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PORPHYROBLAST [5 records]
Record 1 - internal organization data 2017-04-20
Record 1, English
Record 1, Subject field(s)
- Mineralogy
Record 1, Main entry term, English
- andalusite porphyroblast
1, record 1, English, andalusite%20porphyroblast
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Andalusite porphyroblasts are well developed in the Hongusan area and their microstructure can be used to link the deformational history with the metamorphism. 2, record 1, English, - andalusite%20porphyroblast
Record number: 1, Textual support number: 1 OBS
andalusite porphyroblast : term used at Natural Resources Canada-Earth Sciences Sector. 3, record 1, English, - andalusite%20porphyroblast
Record 1, French
Record 1, Domaine(s)
- Minéralogie
Record 1, Main entry term, French
- porphyroblaste d'andalousite
1, record 1, French, porphyroblaste%20d%27andalousite
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
L'ilménite zincifère subsiste surtout au cœur de porphyroblastes syntectoniques d'andalousite. 2, record 1, French, - porphyroblaste%20d%27andalousite
Record number: 1, Textual support number: 1 OBS
porphyroblaste d'andalousite : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre. 3, record 1, French, - porphyroblaste%20d%27andalousite
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2012-04-20
Record 2, English
Record 2, Subject field(s)
- Mineralogy
Record 2, Main entry term, English
- megacryst
1, record 2, English, megacryst
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
A large mineral crystal ... in a finer-grained matrix. 2, record 2, English, - megacryst
Record number: 2, Textual support number: 1 CONT
Kimberlites ... have a distinctive inequigranular texture due to the presence of large rounded, anhedral macrocrysts (i.e., megacrysts and xenocrysts) plus euhedral to subhedral phenocrysts set in a finer grained groundmass. 3, record 2, English, - megacryst
Record number: 2, Textual support number: 1 OBS
A nongenetic term introduced by Clarke(1958...). It may be a phenocryst, a xenocryst, a porphyroblast, or a porphyroclast. 2, record 2, English, - megacryst
Record number: 2, Textual support number: 2 OBS
megacryst: term used at Natural Resources Canada - Earth Sciences Sector. 4, record 2, English, - megacryst
Record 2, French
Record 2, Domaine(s)
- Minéralogie
Record 2, Main entry term, French
- mégacristal
1, record 2, French, m%C3%A9gacristal
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
[...] cristal de grande taille, souvent automorphe, enchâssé dans une matrice à grains fins. 2, record 2, French, - m%C3%A9gacristal
Record number: 2, Textual support number: 1 CONT
Les kimberlites [...] présentent une texture hétérogranulaire distinctive attribuable à la présence de gros macrocristaux (mégacristaux et xénocristaux) automorphes de forme arrondie ainsi que de phénocristaux automorphes et subautomorphes qui sont répartis dans une matrice à grain plus fin. 3, record 2, French, - m%C3%A9gacristal
Record number: 2, Textual support number: 1 OBS
Contrairement au terme phénocristal qui implique une cristallisation à partir du magma initial, le terme mégacristal n'a pas de connotation génétique. 2, record 2, French, - m%C3%A9gacristal
Record number: 2, Textual support number: 2 OBS
mégacristal : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre. 4, record 2, French, - m%C3%A9gacristal
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2011-02-09
Record 3, English
Record 3, Subject field(s)
- Mineralogy
- Gemmology
Record 3, Main entry term, English
- rotational garnet
1, record 3, English, rotational%20garnet
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
- helicitic garnet 2, record 3, English, helicitic%20garnet
correct
- snowball garnet 3, record 3, English, snowball%20garnet
correct
- pinwheel garnet 4, record 3, English, pinwheel%20garnet
correct
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
A spectacular example of synkinematic porphyroblast growth is provided by the so-called snowball garnets, which have spiral trails of inclusions that indicate rotation of either the garnet or the matrix foliation during garnet growth. 5, record 3, English, - rotational%20garnet
Record number: 3, Textual support number: 2 CONT
Garnets in certain metamorphic rocks contain inclusion fabrics whose geometry is very similar to that of the model. Such syntectonic, snowball, or rotational garnets, as they have previously been termed, can be studied in three dimensions. 6, record 3, English, - rotational%20garnet
Record number: 3, Textual support number: 1 OBS
Pinwheel garnet and snowball garnet are designations sometimes applied to those garnets whose inclusions appear to have been rotated. These garnets occur sporadically in foliated metamorphic rocks. Although their presence in diverse rocks has been interpreted variously, present-day consensus appears to be that they represent rotation during growth under conditions of dynamic metamorphism that involved differential pressures. 7, record 3, English, - rotational%20garnet
Record number: 3, Textual support number: 2 OBS
rotational garnet: term used at Natural Resources Canada - Earth Sciences Sector. 8, record 3, English, - rotational%20garnet
Record 3, French
Record 3, Domaine(s)
- Minéralogie
- Gemmologie
Record 3, Main entry term, French
- grenat hélicitique
1, record 3, French, grenat%20h%C3%A9licitique
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- grenat à structure hélicitique 2, record 3, French, grenat%20%C3%A0%20structure%20h%C3%A9licitique
correct, masculine noun
- grenat en boule de neige 3, record 3, French, grenat%20en%20boule%20de%20neige
correct, masculine noun
- grenat boule de neige 4, record 3, French, grenat%20boule%20de%20neige
correct, masculine noun
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Grenat ayant subi une rotation en cours de métamorphisme. 3, record 3, French, - grenat%20h%C3%A9licitique
Record number: 3, Textual support number: 1 CONT
Le grenat hélicitique possède des inclusions se disposant en spirale. 5, record 3, French, - grenat%20h%C3%A9licitique
Record number: 3, Textual support number: 1 OBS
hélicitique : Caractérise les minéraux disposés en forme de spirale dans une roche métamorphique ayant subit une rotation. 6, record 3, French, - grenat%20h%C3%A9licitique
Record number: 3, Textual support number: 2 OBS
grenat hélicitique : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre. 7, record 3, French, - grenat%20h%C3%A9licitique
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2004-10-26
Record 4, English
Record 4, Subject field(s)
- Petrography
Record 4, Main entry term, English
- porphyroblast
1, record 4, English, porphyroblast
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
- metacryst 1, record 4, English, metacryst
correct
- pseudophenocryst 2, record 4, English, pseudophenocryst
correct
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
A pseudoporphyritic crystal in a rock produced by metamorphic recrystallization. 2, record 4, English, - porphyroblast
Record number: 4, Textual support number: 1 CONT
... limy strata have been altered to non-limy rocks by decalcification which has left abundant graphite in the host rocks and ankerite as metacrysts and replacement zone; ... 3, record 4, English, - porphyroblast
Record 4, French
Record 4, Domaine(s)
- Pétrographie
Record 4, Main entry term, French
- porphyroblaste
1, record 4, French, porphyroblaste
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- phénoblaste 2, record 4, French, ph%C3%A9noblaste
correct, masculine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Cristal de grande taille (plusieurs centimètres parfois) ayant cristallisé dans une roche métamorphique. 3, record 4, French, - porphyroblaste
Record number: 4, Textual support number: 1 CONT
Quelques-uns des minéraux de néoformation parsemés se développent beaucoup plus vite que ceux de la trame ambiante. Ils ont ainsi une beaucoup plus grande taille que les autres et rappellent les cristaux porphyriques (phénocristaux) des roches éruptives. On les nomme «porphyroblastes» ou «phénoblastes». 4, record 4, French, - porphyroblaste
Record number: 4, Textual support number: 2 CONT
La structure porphyroblastique [...]. De gros cristaux, les porphyroblastes ou phénoblastes, se détachent dans la trame plus fine de la roche. Cette structure se rapproche de la structure porphyrique des roches éruptives et les phénoblastes sont semblables aux phénocristaux (le suffixe blaste étant réservé aux minéraux d'origine métamorphique). 5, record 4, French, - porphyroblaste
Record number: 4, Textual support number: 3 CONT
[...] des couches calcaires ont été transformées par décalcification en roches non calcaires, un processus d'altération qui a laissé du graphite en abondance dans les roches hôtes et de l'ankérite sous la forme de porphyroblastes et de zones de remplacement; [...] 6, record 4, French, - porphyroblaste
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2003-10-10
Record 5, English
Record 5, Subject field(s)
- Mineralogy
- Petrography
Record 5, Main entry term, English
- -blast
1, record 5, English, %2Dblast
correct, suffix
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
A suffix applied to metamorphic terms and used to indicate the in situ growth of crystals during metamorphic recrystallization. 1, record 5, English, - %2Dblast
Record number: 5, Textual support number: 1 OBS
For example, the term "porphyroblast" refers to a large, well-formed crystal which grew in situ as a rock was metamorphosed. 1, record 5, English, - %2Dblast
Record 5, Key term(s)
- blast
Record 5, French
Record 5, Domaine(s)
- Minéralogie
- Pétrographie
Record 5, Main entry term, French
- -blaste
1, record 5, French, %2Dblaste
correct, suffix, masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
[...] suffixe utilisé dans des termes comme [...] porphyroblaste, [...] et s'appliquant à des structures ou à des minéraux des roches métamorphiques formés pendant (syncinématiques); ou après (postcinématiques ou hystérogènes) une phase métamorphique donnée, et n'effaçant pas nécessairement les anciennes structures. 2, record 5, French, - %2Dblaste
Record 5, Key term(s)
- blaste
Record 5, Spanish
Record 5, Textual support, Spanish
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