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HALO ALTERATION [4 records]
Record 1 - internal organization data 2011-08-17
Record 1, English
Record 1, Subject field(s)
- Geochemistry
- Erosion and Weathering (Geol.)
- Metals Mining
Record 1, Main entry term, English
- halo
1, record 1, English, halo
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- aureole 2, record 1, English, aureole
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
In magnetic and geochemical prospecting, a circular or crescentic distribution pattern into surrounding rocks or ground of a mineral concentration to aid in its location. 3, record 1, English, - halo
Record number: 1, Textual support number: 1 PHR
Alteration halo. 3, record 1, English, - halo
Record 1, French
Record 1, Domaine(s)
- Géochimie
- Érosion et corrosion (Géologie)
- Mines métalliques
Record 1, Main entry term, French
- halo
1, record 1, French, halo
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- auréole 2, record 1, French, aur%C3%A9ole
correct, feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Halos. On sait que beaucoup de minéralisations sont «annoncées» par des modifications dans le chimisme ou la nature minéralogique et pétrographique des roches encaissantes. Les halos de propylitisation autour des concentrations économiques des porphyres cuprifères sont parmi les plus caractéristiques [...] En fait, les halos ne sont qu'un cas extrême des phénomènes de zonalité. Un premier exemple de ces phénomènes nous est fourni par les halos aurifères associés aux gisements d'or de la Mine Lamaque au Québec [...] 3, record 1, French, - halo
Record number: 1, Textual support number: 2 CONT
Plusieurs gîtes de cuivre accompagnés d'altération avec décoloration des roches, sont entourés par des halos [...] dans lesquels la cristallinité de l'illite croît vers l'intérieur. 3, record 1, French, - halo
Record number: 1, Textual support number: 3 CONT
[...] s'il n'existe pas de halos minéralogiques, des halos chimiques de Ag, Mn, Pb et Zn ont été observés [...] Les halos apparaissent jusqu'à 15 ou 20 mètres des filons [...] 3, record 1, French, - halo
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2005-11-20
Record 2, English
Record 2, Subject field(s)
- Geochemistry
- Erosion and Weathering (Geol.)
Record 2, Main entry term, English
- enveloping alteration halo
1, record 2, English, enveloping%20alteration%20halo
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
... many gold-only deposits possess an enveloping alteration halo consisting dominantly of sericite and silica. 1, record 2, English, - enveloping%20alteration%20halo
Record 2, French
Record 2, Domaine(s)
- Géochimie
- Érosion et corrosion (Géologie)
Record 2, Main entry term, French
- enveloppe d'altération
1, record 2, French, enveloppe%20d%27alt%C3%A9ration
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
[...] de nombreux gîtes uniquement aurifères possèdent une enveloppe d'altération qui se compose surtout de séricite et de silice. 1, record 2, French, - enveloppe%20d%27alt%C3%A9ration
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2005-03-07
Record 3, English
Record 3, Subject field(s)
- Metals Mining
- Erosion and Weathering (Geol.)
- Geological Research and Exploration
- Geochemistry
Record 3, Main entry term, English
- alteration envelope
1, record 3, English, alteration%20envelope
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
- alteration aureole 2, record 3, English, alteration%20aureole
correct
- alteration halo 1, record 3, English, alteration%20halo
correct
- halo of alteration 3, record 3, English, halo%20of%20alteration
correct
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
The ... different types of alteration commonly combine to form zoned alteration envelopes ... The zoning, mineralogy and dimensions of the alteration envelopes vary according to the composition of the host lithology. 4, record 3, English, - alteration%20envelope
Record number: 3, Textual support number: 2 CONT
The bulk of the copper in the skarn was deposited in veinlets which cut the andradite-diopside rocks. The alteration envelopes along these veins contain actinolite-calcite-quartz-nontronite assemblages. 5, record 3, English, - alteration%20envelope
Record number: 3, Textual support number: 3 CONT
Many alteration haloes show a zonation of mineral assemblages resulting from the changing nature of the hydrothermal solution as it passes through the wall rocks. 5, record 3, English, - alteration%20envelope
Record number: 3, Textual support number: 4 CONT
Alteration haloes are developed in the wall rocks along the veins as narrow (less than 10 centimetres) zones of calcite, chlorite, epidote, K-feldspar, muscovite and anatase. 4, record 3, English, - alteration%20envelope
Record 3, French
Record 3, Domaine(s)
- Mines métalliques
- Érosion et corrosion (Géologie)
- Recherches et prospections géologiques
- Géochimie
Record 3, Main entry term, French
- halo d'altération
1, record 3, French, halo%20d%27alt%C3%A9ration
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- auréole d'altération 2, record 3, French, aur%C3%A9ole%20d%27alt%C3%A9ration
correct, feminine noun
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
Il est [...] possible que certains «halos» [...] d'altération soient en réalité des fronts de drainage ou de sécrétion latérale vers des cassures, que d'autres soient dus à la diagenèse [...] 3, record 3, French, - halo%20d%27alt%C3%A9ration
Record number: 3, Textual support number: 2 CONT
Auréole d'altération minéralogique. 3, record 3, French, - halo%20d%27alt%C3%A9ration
Record number: 3, Textual support number: 1 OBS
Les corps métallifères [...] peuvent ne pas être visibles à la surface du sol. C'est à l'aide de guides géologiques que l'on soupçonne alors la présence d'une masse minéralisée. Ainsi les altérations en halos autour des minéralisations, la paléogéographie, les contacts avec les granites [...] sont autant de guides qu'il faut savoir exploiter pour découvrir du minerai. 4, record 3, French, - halo%20d%27alt%C3%A9ration
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2004-03-09
Record 4, English
Record 4, Subject field(s)
- Erosion and Weathering (Geol.)
- Geochemistry
Record 4, Main entry term, English
- fenitization
1, record 4, English, fenitization
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
- fenite alteration 2, record 4, English, fenite%20alteration
correct
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
As generally used today, widespread alkali metasomatism of quartzo-feldspathic country rocks in the environs of carbonatite complexes. 3, record 4, English, - fenitization
Record number: 4, Textual support number: 1 CONT
... fenitization ... is associated with carbonatite hosted deposits and ... is characterized by the development of nepheline, aegirine, sodic amphiboles and alkali feldspars in the aureoles of the carbonatite masses ... 4, record 4, English, - fenitization
Record number: 4, Textual support number: 2 CONT
Vanadium deposits mined in the western U.S.A. seem to be the result of fenitization of country rocks at the contact of carbonatite complexes which have been further modified and enriched by subsequent weathering. 5, record 4, English, - fenitization
Record number: 4, Textual support number: 1 PHR
Fenite alteration halo. 2, record 4, English, - fenitization
Record 4, French
Record 4, Domaine(s)
- Érosion et corrosion (Géologie)
- Géochimie
Record 4, Main entry term, French
- fénitisation
1, record 4, French, f%C3%A9nitisation
correct, feminine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- formation de fénites 2, record 4, French, formation%20de%20f%C3%A9nites
feminine noun, masculine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Transformation hydrothermale d'une roche avec transports de matière aboutissant à la formation de fénite. 3, record 4, French, - f%C3%A9nitisation
Record number: 4, Textual support number: 1 CONT
Exceptionnelles, [les carbonatites] se présentent en petits gisements intrusifs ou filoniens [...] En bordure de ces intrusions, on note un métamorphisme de contact particulier : formation de fénites (ou fénitisation), roches acquérant une composition de syénite alcaline. 2, record 4, French, - f%C3%A9nitisation
Record number: 4, Textual support number: 2 CONT
La fénitisation, qui débute parfois par une bréchification, donne naissance à des roches feldspathiques. 4, record 4, French, - f%C3%A9nitisation
Record number: 4, Textual support number: 1 PHR
Auréole de fénitisation. 5, record 4, French, - f%C3%A9nitisation
Record 4, Spanish
Record 4, Textual support, Spanish
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