Formation of garnet coronas during high-P retrogression in mafic granulites of the Mesoarchaean Tasiusarsuaq terrane, southern West Greenland

Nicolas Benjamin Stoltz; Annika Dziggel; Jochen Kolb

Formation of garnet coronas during high-P retrogression in mafic granulites of the Mesoarchaean Tasiusarsuaq terrane, southern West Greenland

Nicolas Benjamin Stoltz
, Annika Dziggel
, Jochen Kolb

Department of Mapping and Mineral Resources

Research output: Contribution to journal › Abstract in journal

Abstract

The Mesoarchaean Tasiusarsuaq terrane in southern West Greenland consists of TTG gneisses, and, locally, supracrustal rocks that were metamorphosed to medium-pressure granulite facies conditions at ca. 2.8 Ga. Typical mineral assemblages in mafic granulites are clinopyroxene + orthopyroxene + plagioclase + quartz + hornblende ± garnet, and quartz + plagioclase + clinopyroxene + orthopyroxene + biotite in TTG gneisses. The peak of metamorphism has been estimated at ca. 750-800°C and 8-10 kbar, and was followed by locally extensive amphibolite-facies retrogression, most notably in a several km-wide zones at the northern margin of the terrane.

Original language	English
Article number	EGU2011-10042-1
Number of pages	2
Journal	Geophysical Research Abstracts
Volume	13
Publication status	Published - 2011
Event	EGU General Assembly 2011 - Vienna, Austria Duration: 3 Apr 2011 → 8 Apr 2011

Programme Area

Programme Area 4: Mineral Resources

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@article{e4b69482b00c4fd3b9e7f9ed6bb516a3,

title = "Formation of garnet coronas during high-P retrogression in mafic granulites of the Mesoarchaean Tasiusarsuaq terrane, southern West Greenland",

abstract = "The Mesoarchaean Tasiusarsuaq terrane in southern West Greenland consists of TTG gneisses, and, locally, supracrustal rocks that were metamorphosed to medium-pressure granulite facies conditions at ca. 2.8 Ga. Typical mineral assemblages in mafic granulites are clinopyroxene + orthopyroxene + plagioclase + quartz + hornblende ± garnet, and quartz + plagioclase + clinopyroxene + orthopyroxene + biotite in TTG gneisses. The peak of metamorphism has been estimated at ca. 750-800°C and 8-10 kbar, and was followed by locally extensive amphibolite-facies retrogression, most notably in a several km-wide zones at the northern margin of the terrane.",

author = "Stoltz, \{Nicolas Benjamin\} and Annika Dziggel and Jochen Kolb",

year = "2011",

language = "English",

volume = "13",

journal = "Geophysical Research Abstracts",

issn = "1607-7962",

publisher = "Copernicus Publications",

note = "EGU General Assembly 2011 ; Conference date: 03-04-2011 Through 08-04-2011",

}

TY - JOUR

T1 - Formation of garnet coronas during high-P retrogression in mafic granulites of the Mesoarchaean Tasiusarsuaq terrane, southern West Greenland

AU - Stoltz, Nicolas Benjamin

AU - Dziggel, Annika

AU - Kolb, Jochen

PY - 2011

Y1 - 2011

N2 - The Mesoarchaean Tasiusarsuaq terrane in southern West Greenland consists of TTG gneisses, and, locally, supracrustal rocks that were metamorphosed to medium-pressure granulite facies conditions at ca. 2.8 Ga. Typical mineral assemblages in mafic granulites are clinopyroxene + orthopyroxene + plagioclase + quartz + hornblende ± garnet, and quartz + plagioclase + clinopyroxene + orthopyroxene + biotite in TTG gneisses. The peak of metamorphism has been estimated at ca. 750-800°C and 8-10 kbar, and was followed by locally extensive amphibolite-facies retrogression, most notably in a several km-wide zones at the northern margin of the terrane.

AB - The Mesoarchaean Tasiusarsuaq terrane in southern West Greenland consists of TTG gneisses, and, locally, supracrustal rocks that were metamorphosed to medium-pressure granulite facies conditions at ca. 2.8 Ga. Typical mineral assemblages in mafic granulites are clinopyroxene + orthopyroxene + plagioclase + quartz + hornblende ± garnet, and quartz + plagioclase + clinopyroxene + orthopyroxene + biotite in TTG gneisses. The peak of metamorphism has been estimated at ca. 750-800°C and 8-10 kbar, and was followed by locally extensive amphibolite-facies retrogression, most notably in a several km-wide zones at the northern margin of the terrane.

M3 - Abstract in journal

SN - 1607-7962

VL - 13

JO - Geophysical Research Abstracts

JF - Geophysical Research Abstracts

M1 - EGU2011-10042-1

T2 - EGU General Assembly 2011

Y2 - 3 April 2011 through 8 April 2011

ER -

Formation of garnet coronas during high-P retrogression in mafic granulites of the Mesoarchaean Tasiusarsuaq terrane, southern West Greenland

Abstract

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