TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A deposit formed in rocks of shallow depth from low-temperature hydrothermal solutions.  2, record 1, English, - epithermal%20deposit

Record number: 1, Textual support number: 1 CONT

General characteristics of epithermal deposits. ... Depth of formation : Near surface to 1500 m. Temperature of formation: 50-200 °C.  3, record 1, English, - epithermal%20deposit

Record number: 1, Textual support number: 2 CONT

... epigenetic-hydrothermal deposits are classified according to their depth and temperature of formation-hypothermal deposits being deep-seated high temperature deposits; mesothermal deposits those formed at low temperatures and medium depths, and... epithermal near-surface deposits.  3, record 1, English, - epithermal%20deposit

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Hydrothermal deposits. Minerals which occur usually in cross-cutting bodies such as veins, in igneous, sedimentary and metamorphic rocks.(i) hypothermal vein mineralization(300-500 °C)... ;(ii) mesothermal vein mineralization(200-300 °C)... ;(iii) epithermal vein mineralization(50-200 °C)....  1, record 2, English, - hypothermal%20mineralization

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Minéralisation qui s'est formée sous une température variant entre 300 et 500 °C.  2, record 2, French, - min%C3%A9ralisation%20hypothermale

Record number: 2, Textual support number: 1 CONT

[...] en Kabylie de Collo des minéralisations hypo- et mésothermales montrent une répartition zonale par rapport aux granites miocènes [...]  3, record 2, French, - min%C3%A9ralisation%20hypothermale

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Vein deposit formed within about a kilometre of the Earth’s surface by hot (50-200 °C), ascending solutions which often produce shatter zones.  2, record 3, English, - epithermal%20vein%20deposit

Record number: 3, Textual support number: 1 CONT

... the mesothermal vein deposits typically have gold/silver ratios greater than one, whereas the epithermal vein deposits are generally much more argentiferous.  1, record 3, English, - epithermal%20vein%20deposit

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Gisements hydrothermaux : - filoniens hypothermaux. Exemple : pyrrhotite, nickel, cobalt; - filoniens mésothermaux. Exemple : blende, pyrite, galène, chalcopyrite; - filoniens épithermaux. Exemple : mercure.  1, record 3, French, - gisement%20filonien%20%C3%A9pithermal

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

Of, relating to, or designating mineral and ore deposits formed by hydrothermal action at intermediate temperature and pressure.  2, record 4, English, - mesothermal

Record number: 4, Textual support number: 1 PHR

Mesothermal vein.  3, record 4, English, - mesothermal

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Se dit d'un filon dont les conditions (pression, température) qui ont présidé à sa formation sont moindres que celles qui se rattachent au filon hydrothermal.  2, record 4, French, - m%C3%A9sothermal

Record number: 4, Textual support number: 1 PHR

Gîte filonien mésothermal.  3, record 4, French, - m%C3%A9sothermal

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

The replacement by, conversion into, or introduction of chlorite.  4, record 5, English, - chloritization

Record number: 5, Textual support number: 1 CONT

Chloritization is the replacement of amphiboles ... especially in rocks of lower amphibolite metamorphic facies, by chlorite.  5, record 5, English, - chloritization

Record number: 5, Textual support number: 2 CONT

The main types of alteration around mesothermal veins include carbonatization, sulfidation, alkali metasomatism, chloritization and silicification...  5, record 5, English, - chloritization

Record number: 5, Textual support number: 1 OBS

chlorite alteration: term used at Natural Resources Canada - Earth Sciences Sector  6, record 5, English, - chloritization

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Formation de chlorite selon divers processus et à partir de divers minéraux (surtout silicatés ferromagnésiens).  3, record 5, French, - chloritisation

Record number: 5, Textual support number: 1 CONT

Chloritisation.- Cette altération très complexe comprend une hydratation et une libération de K [...] et de Fe (hématite ou magnétite); il se produit également de la silice, des carbonates [...], de l'épidote, des hydromicas (vermiculite) et les argiles de néoformation (kaolinite, halloysite). Les chlorites sont des silicates d'Al et Mg avec eau de combinaison, qui forment rarement des espèces bien définies.  4, record 5, French, - chloritisation

Record number: 5, Textual support number: 2 CONT

[...] vers la profondeur, le molybdène tend à remplacer le tungstène. Au contact des filons, apparaît une altération en séricite et chlorite.  2, record 5, French, - chloritisation

Record number: 5, Textual support number: 1 OBS

chloritisation : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.  5, record 5, French, - chloritisation

Record number: 5, Textual support number: 1 PHR

Chloritisation par rétrométamorphisme.  2, record 5, French, - chloritisation

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

A zone in ore deposits consisting of the top of Lindgren's mesothermal zone and the bottom of the epithermal zone.  2, record 6, English, - leptothermal

Record number: 6, Textual support number: 1 CONT

... epigenetic-hydrothermal deposits are classified according to their depth and temperature of formation-hypothermal deposits being deep-seated high temperature deposits; mesothermal deposits those formed at low temperatures and medium depths, and, thirdly, epithermal, near-surface deposits. Later terms include leptothermal to cover deposits gradational from mesothermal to epithermal, and telethermal for very low-temperature deposits formed at great distances from the source of the hydrothermal solutions which gave rise to them.  3, record 6, English, - leptothermal

Record number: 6, Textual support number: 1 OBS

leptothermal... Mineral grain size averages smaller and more variable than in mesothermal ores. There is an increased development of vugs toward the shallower limit of the zone. Rock alteration varies from sericitic to propylitic. Vertical depth range is estimated from 10, 000 to 15, 000 feet.  2, record 6, English, - leptothermal

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

On sépare quelquefois un type «leptothermal», qui correspond à la partie supérieure du mésothermal, sans posséder franchement les caractéristiques épithermales. Les textures rubanées et drusiques y sont plus développées que dans le mésothermal; le grain plus irrégulier.  1, record 6, French, - leptothermal

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

A mineral deposit that is confined to a stratigraphic unit.  3, record 7, English, - stratabound%20deposit

Record number: 7, Textual support number: 1 CONT

Stratiform gold deposits, though possessing some of the features of mesothermal deposits and other disseminated stratabound deposits, are more similar to other types of stratiform deposits.  4, record 7, English, - stratabound%20deposit

Record number: 7, Textual support number: 1 OBS

Strata-bound Deposits. ... The term strata-bound is applied, irrespective of their morphology, to those deposits which are restricted to a fairly limited stratigraphical range within the strata of a particular region.  2, record 7, English, - stratabound%20deposit

Record number: 7, Textual support number: 2 OBS

... the stratiform deposits of the Zambian Copperbelt are all developed at about the same stratigraphic horizon in the Roan Series ... and these ... may be described as strata-bound. Clearly, stratiform deposits can be strata-bound but strata-bound ores are not necessarily stratiform.  2, record 7, English, - stratabound%20deposit

Record number: 7, Textual support number: 3 OBS

stratabound deposit: term used at Natural Resources Canada - Earth Sciences Sector.  3, record 7, English, - stratabound%20deposit

Record number: 7, Textual support number: 1 PHR

Stratabound ore deposit.  5, record 7, English, - stratabound%20deposit

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

Gîte minéral présentant l'allure d'une strate.  4, record 7, French, - g%C3%AEte%20strato%C3%AFde

Record number: 7, Textual support number: 1 CONT

Les gisements liés à des «strates» sont généralement des gîtes stratiformes. Mais il peut exister aussi, associés à des niveaux lithologiques, des gîtes métamorphiques (skarns) ou magmatiques, comme les gisements de platine d'Afrique du Sud dans les cumulats ultrabasiques.  3, record 7, French, - g%C3%AEte%20strato%C3%AFde

Record number: 7, Textual support number: 2 CONT

Il s'agit de minéraux dispersés (inclusions) ou concentrés en amas ou en véritables lits (gisements «stratoïdes»). [...] Ces divers grands «types» de minéralisations ne s'associent pas indifféremment à n'importe quelle roche basique ou ultrabasique. Les unes se lient à des roches ultrabasiques [...] les autres à des roches basiques plus ou moins feldspathiques [...]  5, record 7, French, - g%C3%AEte%20strato%C3%AFde

Record number: 7, Textual support number: 1 OBS

gisement stratoïde : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.  4, record 7, French, - g%C3%AEte%20strato%C3%AFde

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

... sea-floor spreading centers are ... sites of precipitation of sulfide deposits of copper, iron, lead and zinc, along with sulfate minerals such as barite.  1, record 8, English, - sulfide%20deposit

Record number: 8, Textual support number: 2 CONT

... the sulphidic deposits have a timing and fluid source identical to that of mesothermal quartz-carbonate vein deposits...  4, record 8, English, - sulfide%20deposit

Record number: 8, Textual support number: 1 OBS

sulphide deposit: term used at Natural Resources Canada - Earth Sciences Sector.  5, record 8, English, - sulfide%20deposit

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 CONT

[...] pour de grandes étendues inconnues et difficiles d'accès, notamment en pays couvert, la prospection aéroportée permet de détecter des gisements sulfurés; [...]  5, record 8, French, - d%C3%A9p%C3%B4t%20sulfur%C3%A9

Record number: 8, Textual support number: 2 CONT

[...] des dépôts sulfurés, sensés présenter certains caractères «hydrothermaux» apparaissent loin de tout granite, dans des couches sédimentaires demeurées très souvent tabulaires, mais en général faillées [...] Les plus remarquables d'entre eux sont d'énormes gisements de zinc et plomb dans des strates carbonatées, calcaires ou dolomitiques [...]  6, record 8, French, - d%C3%A9p%C3%B4t%20sulfur%C3%A9

Record number: 8, Textual support number: 3 CONT

Vanadium sur gîtes sulfurés.  7, record 8, French, - d%C3%A9p%C3%B4t%20sulfur%C3%A9

Record number: 8, Textual support number: 1 OBS

dépôt sulfuré : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.  8, record 8, French, - d%C3%A9p%C3%B4t%20sulfur%C3%A9

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

... mesothermal veins are found in structural environments of intermediate level within the crust... characterized by low to medium grade metamorphic rocks and generally dominated by compressive tectonic regimes.  3, record 9, English, - low%2Dgrade%20metamorphosed%20rock

Record number: 9, Textual support number: 2 CONT

Chloritoid is most commonly found in low-grade regionally metamorphosed rocks.  1, record 9, English, - low%2Dgrade%20metamorphosed%20rock

Record number: 9, Textual support number: 1 OBS

low-grade metamorphic rock; low-grade rock: terms used at Natural Resources Canada - Earth Sciences Sector.  5, record 9, English, - low%2Dgrade%20metamorphosed%20rock

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 CONT

Les roches métamorphiques à l'est de cette zone ont donné au K-Ar entre 1,600 et 1,800 m.a. et des roches peu métamorphisées du géosynclinal ont donné des âges similaires.  3, record 9, French, - roche%20faiblement%20m%C3%A9tamorphis%C3%A9e

Record number: 9, Textual support number: 1 OBS

roche de métamorphisme faible; roche faiblement métamorphique : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.  5, record 9, French, - roche%20faiblement%20m%C3%A9tamorphis%C3%A9e

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 DEF

A gold-mining district.  8, record 10, English, - goldfield

Record number: 10, Textual support number: 1 CONT

Uranium is recovered as a by-product of the working of the Witwatersrand goldfields.  9, record 10, English, - goldfield

Record number: 10, Textual support number: 2 CONT

The New Mexican gold-field is probably much more extensive than is generally supposed, and when it is thoroughly prospected, many more rich placers will doubtless be found.  3, record 10, English, - goldfield

Record number: 10, Textual support number: 3 CONT

Mesothermal gold districts.  3, record 10, English, - goldfield

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 CONT

Les districts aurifères de la République Sud-Africaine [...] Affleurements du «système du Witwatersrand» [...]  5, record 10, French, - district%20aurif%C3%A8re

Record number: 10, Textual support number: 2 CONT

[...] le champ d'or alluvial de Bulolo, en Nouvelle-Guinée, a été «estimé» par des prospecteurs parachutés.  3, record 10, French, - district%20aurif%C3%A8re

Record number: 10, Textual support number: 3 CONT

Pour les grands champs aurifères alluviaux, la teneur limite d'exploitabilité est de l'ordre de 0,15 à 0,20 g par mètre cube d'alluvion en place [...]  3, record 10, French, - district%20aurif%C3%A8re

Record number: 10, Textual support number: 4 CONT

Dans l'exploitation par dragues flottantes des grands champs d'or alluvionnaires, les godets des dragues traînent sur le bed-rock et le raclent s'il est suffisamment tendre.  3, record 10, French, - district%20aurif%C3%A8re

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 CONT

... mesothermal veins are found in structural environments of intermediate level within the crust(mesozonal environments), characterized by low to medium grade metamorphic rocks and generally dominated by compressive tectonic regimes.  3, record 11, English, - mesothermal%20vein

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 DEF

[...] filon qui a été rempli à moindre profondeur et à moindre température qu'un filon hypothermal.  2, record 11, French, - filon%20m%C3%A9sothermal

Record number: 11, Textual support number: 1 CONT

[...] les filons mésothermaux (300-200°) forment un système de veines [...] complexes qui ne sont pas en rapport direct avec le magma ou les pegmatites. La gangue est quartzeuse ou carbonatée, et renferme des minéraux de basse température comme le kaolin.  3, record 11, French, - filon%20m%C3%A9sothermal

Record number: 11, Textual support number: 2 CONT

Les filons mésothermaux sont ceux qui exhibent les meilleurs exemples de zonalité. Les variations minéralogiques n'y sont ni trop rapides, ni assez lentes pour être imperceptibles.  4, record 11, French, - filon%20m%C3%A9sothermal

Record 11,  Textual support,  Spanish

Record number: 11, Textual support number: 1 DEF

Filón hidrotermal que se ha formado a temperaturas medias.  1, record 11, Spanish, - fil%C3%B3n%20mesotermal

Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 CONT

Genetic models for mesothermal vein deposits are still the subject of much debate. However, despite the wide variety of structural and geologic settings, these deposits share characteristics which point toward their formation by hydrothermal fluids...  1, record 12, English, - geologic%20setting

Record number: 12, Textual support number: 2 CONT

... the two major types of chromite deposit belong to very different geological environments.  7, record 12, English, - geologic%20setting

Record 12,  Textual support,  French

Record number: 12, Textual support number: 1 CONT

[...] les processus de minéralisation aboutissant à l'apparition de gîtes [...] ne peuvent et ne doivent être étudiés que dans leur cadre historique et en liaison étroite avec tous les autres aspects de cette évolution [de l'écorce terrestre]. Cette dernière et impérative nécessité [...] justifie la préoccupation actuelle d'une classification «naturelle» [...] des «types» de gisements [...] dans leur cadre géologique.  3, record 12, French, - cadre%20g%C3%A9ologique

Record number: 12, Textual support number: 2 CONT

La formation des corps minéralisés est parfois intimement mêlée à celle des roches encaissantes [...], tandis que, d'autres fois, le corps minéralisé apparaît comme un intrus au milieu de son entourage géologique.  3, record 12, French, - cadre%20g%C3%A9ologique

Record number: 12, Textual support number: 3 CONT

[...] la gîtologie, c'est-à-dire l'étude de tous les aspects ou éléments du milieu géologique associés aux concentrations minérales.  5, record 12, French, - cadre%20g%C3%A9ologique

Record number: 12, Textual support number: 4 CONT

Dans tel environnement géologique, on peut espérer trouver telle substance [...]  6, record 12, French, - cadre%20g%C3%A9ologique

Record 12,  Textual support,  Spanish

Record 13,  Textual support,  English

Record number: 13, Textual support number: 1 DEF

A mineral deposit formed at moderate temperatures and moderate pressures, in and along fissures or other openings in rocks, by deposition at intermediate depths, chiefly from hydrothermal fluids derived from consolidating intruding rocks.  4, record 13, English, - mesothermal%20deposit

Record number: 13, Textual support number: 1 CONT

... epigenetic-hydrothermal deposits are classified according to their depth and temperature of formation-hypothermal deposits being deep-seated high temperature deposits; mesothermal deposits those formed at low temperatures and medium depths, and, thirdly, epithermal near-surface deposits.  5, record 13, English, - mesothermal%20deposit

Record number: 13, Textual support number: 2 CONT

... mesothermal deposits... may be associated with regional tectonic fractures. Common in both normal and reversed faults.  5, record 13, English, - mesothermal%20deposit

Record number: 13, Textual support number: 1 OBS

Mesothermal deposits("transitional" deposits of Panteleyev, 1986), which may form as deep as perhaps 3000 m in close association with intrusions, have many characteristics in common with epithermal deposits, including aspects of their origin.  3, record 13, English, - mesothermal%20deposit

Record 13,  Textual support,  French

Record number: 13, Textual support number: 1 DEF

Gisement hydrothermal qui a été formé par des solutions ascendantes à moindre profondeur et à moindre température qu'un gisement hypothermal.  5, record 13, French, - g%C3%AEte%20m%C3%A9sothermal

Record number: 13, Textual support number: 1 CONT

Gîtes mésothermaux. Ce sont ceux qui permettent le mieux l'application pratique de la zonalité, car les variations minéralogiques n'y sont ni trop rapides ni assez lentes pour être imperceptibles.  2, record 13, French, - g%C3%AEte%20m%C3%A9sothermal

Record number: 13, Textual support number: 2 CONT

Les dépôts mésothermaux autres que les veines de quartz aurifère peuvent se rencontrer avec les failles inverses ou normales ou une combinaison des deux [...]  2, record 13, French, - g%C3%AEte%20m%C3%A9sothermal

Record number: 13, Textual support number: 1 OBS

Les gîtes mésothermaux (les gîtes «transitionnels» de Panteleyev, 1986), qui peuvent se former à des profondeurs atteignant peut-être 3 000 m, en étroite association avec des intrusions, présentent de nombreuses caractéristiques communes avec les gîtes épithermaux, y compris certains aspects concernant leur origine.  4, record 13, French, - g%C3%AEte%20m%C3%A9sothermal

Record 13,  Textual support,  Spanish

Record 14,  Textual support,  English

Record number: 14, Textual support number: 1 CONT

The main types of alteration around mesothermal veins include carbonatization, sulfidation, alkali metasomatism, chloritization, and silicification... Alkali metasomatism, the addition of Na, K, and Ca to wallrocks, is observed in proximity to most veins.  2, record 14, English, - alkali%20metasomatism

Record 14,  Textual support,  French

Record 14,  Textual support,  Spanish

Record 15,  Textual support,  English

Record number: 15, Textual support number: 1 CONT

General characteristics of mesothermal deposits... Nature of ore zones : Extensive replacement deposits or fracture fillings.  3, record 15, English, - fracture%20filling

Record number: 15, Textual support number: 2 CONT

Fracture fillings may ... form at various stages and represent intermittent open-system conditions that probably occur briefly during pegmatite crystallization.  4, record 15, English, - fracture%20filling

Record number: 15, Textual support number: 3 CONT

Gold typically occurs as coatings on, or as inclusions and fracture-fillings within, sulphide grains ...  2, record 15, English, - fracture%20filling

Record 15,  Textual support,  French

Record number: 15, Textual support number: 1 CONT

Un très grand nombre de filons peuvent être considérés comme des remplissages de fractures [...]  6, record 15, French, - remplissage%20de%20fractures

Record number: 15, Textual support number: 2 CONT

Si les magmas sont souvent chargés en métaux, les solutions hydrothermales qui les accompagnent peuvent aussi mobiliser et véhiculer des minéralisations préexistantes [...] Ces minéralisations se déposent soit par remplacement dans des calcaires (gangue réactive), soit en remplissage de fractures.  7, record 15, French, - remplissage%20de%20fractures

Record number: 15, Textual support number: 3 CONT

[...] le cuivre se comporte d'une manière différente selon qu'il se trouve disséminé ou en remplissage de cassure dans les systèmes porphyriques.  4, record 15, French, - remplissage%20de%20fractures

Record 15,  Textual support,  Spanish

Record 16,  Textual support,  English

Record number: 16, Textual support number: 1 CONT

... mesothermal veins are found in structural environments... characterized by low to medium grade metamorphic rocks and generally dominated by compressive tectonic regimes.  1, record 16, English, - compressional%20tectonic%20regime

Record number: 16, Textual support number: 2 CONT

A common characteristic of the faults and shear zones hosting mesothermal veins is that they have all been formed in compressional tectonic regimes : displacements range from strike-slip to reverse dip-slip.  1, record 16, English, - compressional%20tectonic%20regime

Record 16,  Textual support,  French

Record number: 16, Textual support number: 1 OBS

S'il survient une accélération de la subduction, le système se coince et il se développe des contraintes compressives suffisantes pour créer des plissements. Ce régime de compression est toutefois de courte durée (les structures compressives restent donc limitées) [...]  2, record 16, French, - r%C3%A9gime%20tectonique%20de%20compression

Record 16,  Textual support,  Spanish

Record 17,  Textual support,  English

Record number: 17, Textual support number: 1 DEF

A deep-seated high temperature deposit, below the mesothermal zone.  2, record 17, English, - hypothermal%20deposit

Record number: 17, Textual support number: 1 CONT

General characteristics of hypothermal deposits. (After Lindgren 1933). Depth of formation: 3000-1500 m. Temperature of formation: [approximately] 300-600°C. Occurrence: In or near deep-seated acid plutonic rocks in deeply eroded areas ...  3, record 17, English, - hypothermal%20deposit

Record number: 17, Textual support number: 2 CONT

... hypothermal deposits [have formed] at 3 km to more than 5 km.  4, record 17, English, - hypothermal%20deposit

Record 17,  Textual support,  French

Record number: 17, Textual support number: 1 DEF

Gîte minéral formé à pression et température élevées.  4, record 17, French, - g%C3%AEte%20hypothermal

Record number: 17, Textual support number: 1 CONT

[...] Lindgren a indiqué les domaines de profondeur et de température qu'il assignait aux dépôts hypo-, méso- et épithermaux. [...] les «hypo» sont les gîtes «profonds» et chauds, et «épi» signifie plus élevé et de basse température.  5, record 17, French, - g%C3%AEte%20hypothermal

Record number: 17, Textual support number: 2 CONT

Beaucoup de dépôts hypothermaux [...] sont dans, ou associés à, des failles inverses ou des décrochements.  5, record 17, French, - g%C3%AEte%20hypothermal

Record number: 17, Textual support number: 3 CONT

^...] les gîtes hypothermaux [sont] formés à des profondeurs de 3 à 5 km et plus.  6, record 17, French, - g%C3%AEte%20hypothermal

Record 17,  Textual support,  Spanish

Record 18,  Textual support,  English

Record number: 18, Textual support number: 1 CONT

Genetic models for mesothermal vein deposits are still the subject of much debate.... In the metamorphic model, gold is derived from the underlying host rocks by dissolution into a metamorphic fluid released during prograde metamorphism, and focused into shear zones, faults, and related dilational zones. Interaction of such metamorphic fluids with magmas and magmatic fluids may be fundamental to production of a fluid with an appropriate composition to dissolve the gold and other vein constituents...  2, record 18, English, - metamorphic%20fluid

Record 18,  Textual support,  French

Record number: 18, Textual support number: 1 CONT

Le zinc (100 p.p.m. dans les tholéites à olivine non altérées) est lessivé dans toutes les roches fortement altérées des zones perméables et transporté par les fluides métamorphiques. Le nickel est peu déplacé lors des processus métamorphiques.  2, record 18, French, - fluide%20m%C3%A9tamorphique

Record 18,  Textual support,  Spanish

Record 19,  Textual support,  English

Record number: 19, Textual support number: 1 CONT

Typical tonnage and grade of mesothermal deposits are a few million tonnes of ore at a grade of 6 to 10 g/t gold.  2, record 19, English, - tonnage

Record number: 19, Textual support number: 2 CONT

Most [porphyry copper] deposits have grades of 0.4-1% copper and total tonnages range up to 1000 million with a few giants being even larger than this ...  3, record 19, English, - tonnage

Record number: 19, Textual support number: 3 CONT

... the large tonnage of molybdenum which is present in the deposits.  3, record 19, English, - tonnage

Record number: 19, Textual support number: 4 CONT

Tonnages generally range from a few tens of thousands up to 20 Mt.  3, record 19, English, - tonnage

Record 19,  Textual support,  French

Record number: 19, Textual support number: 1 CONT

L'exploitabilité d'une concentration métallifère dépend non seulement de sa teneur en métal mais aussi de la quantité totale de métal qu'elle contient ou, autrement dit, de son tonnage.  2, record 19, French, - tonnage

Record number: 19, Textual support number: 2 CONT

La présence de la masse métallifère soupçonnée doit être confirmée par des sondages qui permettront d'avoir une idée sur sa teneur, son volume (tonnage), l'aspect du minerai [...], la forme du gisement [...]  2, record 19, French, - tonnage

Record number: 19, Textual support number: 3 CONT

On estime la valeur du minerai [...] circonscrit, en tenant compte du tonnage, de la teneur en éléments utiles.  3, record 19, French, - tonnage

Record 19,  Textual support,  Spanish

Record 20,  Textual support,  English

Record number: 20, Textual support number: 1 CONT

In general, mesothermal veins are not strongly associated with any particular type of rock, probably simply reflecting the fact that they are controlled by structures which can form in almost any rock type.... In some cases, iron-rich lithologies are a favourable host to mesothermal veins, possibly reflecting a chemical control.  2, record 20, English, - chemical%20control

Record 20,  Textual support,  French

Record 20,  Textual support,  Spanish

Record 21,  Textual support,  English

Record number: 21, Textual support number: 1 CONT

Quartz-Carbonate Vein Gold Deposits in Metamorphic Terranes.... This type of gold deposit consists dominantly of quartz-carbonate veins in metamorphosed volcanic, sedimentary and granitoid rocks. Such deposits are commonly referred to as mesothermal vein deposits in the literature, in part after the classification of Lindgren(1933) ;...  1, record 21, English, - mesothermal%20vein%20deposit

Record number: 21, Textual support number: 2 CONT

Of paramount importance are the abundant quartz-carbonate vein deposits that typify greenstone terrains of all ages; because their inferred conditions of formation are compatible with the low to medium metamorphic grade of their host rocks, these deposits are also commonly referred to as mesothermal vein deposits.  1, record 21, English, - mesothermal%20vein%20deposit

Record 21,  Textual support,  French

Record 21,  Textual support,  Spanish

Record 22,  Textual support,  English

Record number: 22, Textual support number: 1 CONT

Staurolite ... is formed in medium-grade regionally metamorphosed argillaceous rocks.  1, record 22, English, - medium%2Dgrade%20metamorphosed%20rock

Record number: 22, Textual support number: 2 CONT

... mesothermal veins are found in structural environments of intermediate level within the crust... characterized by low to medium grade metamorphic rocks and generally dominated by compressive tectonic regimes.  2, record 22, English, - medium%2Dgrade%20metamorphosed%20rock

Record 22,  Textual support,  French

Record 22,  Textual support,  Spanish

Record 23,  Textual support,  English

Record number: 23, Textual support number: 1 CONT

The epithermal deposits... are distinct... from "mesothermal" or Mother Lode type gold-quartz vein deposits...  1, record 23, English, - Mother%20Lode%20type

Record 23,  Textual support,  French

Record number: 23, Textual support number: 1 CONT

Les travaux ont d'abord été principalement axés sur la définition des meilleurs secteurs au sein de la séquence ultramafique (type Mother Lode) [...]  1, record 23, French, - type%20Mother%20Lode

Record 23,  Textual support,  Spanish

Record 24,  Textual support,  English

Record number: 24, Textual support number: 1 DEF

A crustified vein composed of layers of different minerals, parallel to the walls.  3, record 24, English, - banded%20vein

Record number: 24, Textual support number: 1 CONT

Textures and structures [of mesothermal deposits].... Veins are often banded, large lenses usually massive.  4, record 24, English, - banded%20vein

Record 24,  Textual support,  French

Record number: 24, Textual support number: 1 DEF

Filon constitué de couches de différents minéraux parallèles aux épontes.  3, record 24, French, - filon%20ruban%C3%A9

Record number: 24, Textual support number: 1 CONT

Certains minéraux de valeur se cristallisent à partir de solutions à haute température, d'autres lorsque la température est moyenne et quelques-uns, à une température assez basse [...] Certains gros filons sont rubanés, les bandes mises en place à haute température étant plus profondes ou plus rapprochées de la masse d'intrusion.  4, record 24, French, - filon%20ruban%C3%A9

Record number: 24, Textual support number: 2 CONT

Quand il y a remplissage, les filons sont souvent rubanés, bréchiques.  5, record 24, French, - filon%20ruban%C3%A9

Record 24,  Textual support,  Spanish

Record 25,  Textual support,  English

Record number: 25, Textual support number: 1 CONT

In most mesothermal gold veins, the gold mineralization occurs in the veins, but in some deposits the bulk of the gold is in the adjacent altered wallrocks, or in both.  1, record 25, English, - altered%20wallrock

Record number: 25, Textual support number: 1 OBS

wall-rock alteration: Alteration of country rock adjacent to hydrothermal ore deposits by the fluids responsible for or derived during the formation of the deposits ....  3, record 25, English, - altered%20wallrock

Record 25,  Textual support,  French

Record number: 25, Textual support number: 1 CONT

Encaissant altéré : enrichi en carbonates et appauvri en silice.  2, record 25, French, - roche%20encaissante%20alt%C3%A9r%C3%A9e

Record number: 25, Textual support number: 1 OBS

Voir fiches «roche altérée» et «roche encaissante».  1, record 25, French, - roche%20encaissante%20alt%C3%A9r%C3%A9e

Record 25,  Textual support,  Spanish

Record 26,  Textual support,  English

Record number: 26, Textual support number: 1 CONT

Mesothermal vein mineralization(200-300°C).  1, record 26, English, - mesothermal%20mineralization

Record 26,  Textual support,  French

Record number: 26, Textual support number: 1 CONT

Les changements minéralogiques en relation avec les minéralisations hypothermales sont l'apparition de grenats, amphiboles, pyroxène, tourmaline, biotite; avec les minéralisations mésothermales : séricite, chlorite, carbonates, silice, et, avec les minéralisations épithermales et surtout volcaniques, en général : quelquefois séricite,souvent chlorite, carbonates, adulaire, alunite, argile.  2, record 26, French, - min%C3%A9ralisation%20m%C3%A9sothermale

Record 26,  Textual support,  Spanish

Record 27,  Textual support,  English

Record number: 27, Textual support number: 1 CONT

Mesothermal veins are associated with folds ranging from those of regional scale... to large to small scale, fault-related asymmetric folds....  1, record 27, English, - fault%2Drelated

Record 27,  Textual support,  French

Record number: 27, Textual support number: 1 CONT

(...) le quartz minéralisé n'est pas lié à des failles ou à des zones broyées découpant la rhyolite.  1, record 27, French, - li%C3%A9%20%C3%A0%20des%20failles

Record 27,  Textual support,  Spanish

Record 28,  Textual support,  English

Record number: 28, Textual support number: 1 DEF

Mesothermal vein gold deposits... are characterized by... lithologic facies [that] range from clastic sedimentary(mainly turbiditic) sequences, to mafic to felsic volcanic piles... At the district scale, two main favourable host rock sequences can be identified : clastic sedimentary sequences and volcanic-dominated sequences.  1, record 28, English, - clastic%20sedimentary%20sequence

Record 28,  Textual support,  French

Record number: 28, Textual support number: 1 OBS

Voir fiche "clastic sequence".  1, record 28, French, - s%C3%A9rie%20s%C3%A9dimentaire%20clastique

Record number: 28, Textual support number: 2 OBS

Voir fiche "lithologic sequence".  1, record 28, French, - s%C3%A9rie%20s%C3%A9dimentaire%20clastique

Record 28,  Textual support,  Spanish