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GABBRO LEUCOCRATE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-08-16

English

Subject field(s)
  • Petrography
DEF

A light-colored gabbro.

OBS

... leucogabbro (formerly termed gabbro-anorthosite ...).

OBS

leucogabbro: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Pétrographie
CONT

Leucogabbros, mélanogabbros. Ce sont des faciès de variation de gabbros classiques, les uns appauvris, les autres enrichis en pyroxène.

OBS

[...] leucogabbro (autrefois appelé «gabbro-anorthosite» [...]

OBS

leucogabbro : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 1

Record 2 2006-11-15

English

Subject field(s)
  • Petrography
CONT

Hornblende diorite is found in Precambrian basement rocks, and is mottled light grey, pale pink, and greenish-black in colour. It consists mainly of substantially altered plagioclase feldspar (60%) and hornblende (40%), with minor amounts of magnetite and small veins of calcite and epidote ... The rock is very coarse- to mainly coarse-grained. Very coarse-grained varieties can be pegmatitic with grains up to 7 cm in length, this type of rock can be called a pegmatitic hornblende diorite.

OBS

pegmatitic hornblende diorite: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Pétrographie
CONT

Des dykes relativement épais, comme la diorite de Dufresnoy dans le Camp central, sont subconcordants à la stratigraphie et présentent des bordures métriques hybrides, qui renferment une abondance de xénolites des unités volcaniques adjacentes, passant graduellement à une phase marginale interne de gabbro à diorite à hornblende recoupée par une diorite quartzifère à hornblende pegmatitique et grenue, qui fait place vers l'intérieur du dyke à une phase dioritique grenue et plus leucocrate.

OBS

diorite à hornblende pegmatitique : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 2

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