Metamorphic evolution of calcsilicate granulites near Battye Glacier, northern Prince Charles Mountains, East Antarctica
Calcsilicate granulites of probable Middle Proterozoic age ( c .1000–1100 Ma) in the vicinity of Battye Glacier, northern Prince Charles Mountains, East Antarctica, contain prograde metamorphic assemblages comprising various combinations of wollastonite, scapolite, clinopyroxene, An‐rich plagioclase...
Published in: | Journal of Metamorphic Geology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1997
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1525-1314.1997.00024.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1525-1314.1997.00024.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1525-1314.1997.00024.x |
id |
crwiley:10.1111/j.1525-1314.1997.00024.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1525-1314.1997.00024.x 2024-04-28T07:59:39+00:00 Metamorphic evolution of calcsilicate granulites near Battye Glacier, northern Prince Charles Mountains, East Antarctica STEPHENSON, N. C. N. COOK*, N. D. J. 1997 http://dx.doi.org/10.1111/j.1525-1314.1997.00024.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1525-1314.1997.00024.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1525-1314.1997.00024.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Metamorphic Geology volume 15, issue 3, page 361-378 ISSN 0263-4929 1525-1314 Geochemistry and Petrology Geology journal-article 1997 crwiley https://doi.org/10.1111/j.1525-1314.1997.00024.x 2024-04-05T07:38:34Z Calcsilicate granulites of probable Middle Proterozoic age ( c .1000–1100 Ma) in the vicinity of Battye Glacier, northern Prince Charles Mountains, East Antarctica, contain prograde metamorphic assemblages comprising various combinations of wollastonite, scapolite, clinopyroxene, An‐rich plagioclase, calcite, quartz, titanite and, rarely, orthoclase, ilmenite, phlogopite and graphite. Comparison of the prograde assemblages with calculated and experimentally determined phase relations in the simple CaO–Al 2 O 3 –SiO 2 –CO 2 –H 2 O system suggests peak metamorphism at ≥835 °C in the presence (in wollastonite‐bearing assemblages at least) of a CO 2 ‐bearing fluid ( X CO ≥0.3) at a probable pressure of 6–7 kbar. Well‐preserved retrograde reaction textures represent: (1) breakdown of scapolite to anorthite+calcite±quartz; (2) formation of grossular–andradite garnet and, locally, (3) epidote, both principally by reactions involving scapolite breakdown products and clinopyroxene; (4) local coupled replacement of clinopyroxene and ilmenite by hornblende and titanite, respectively; and finally (5) local sericitization of prograde and retrograde plagioclase. These retrograde reactions are interpreted to be the result of cooling and variable infiltration by H 2 O‐rich fluids, possibly derived from crystallizing pegmatitic intrusions and segregations that may be partial melts, which are common throughout the area. Article in Journal/Newspaper Antarc* Antarctica Battye Glacier East Antarctica Prince Charles Mountains Wiley Online Library Journal of Metamorphic Geology 15 3 361 378 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Geochemistry and Petrology Geology |
spellingShingle |
Geochemistry and Petrology Geology STEPHENSON, N. C. N. COOK*, N. D. J. Metamorphic evolution of calcsilicate granulites near Battye Glacier, northern Prince Charles Mountains, East Antarctica |
topic_facet |
Geochemistry and Petrology Geology |
description |
Calcsilicate granulites of probable Middle Proterozoic age ( c .1000–1100 Ma) in the vicinity of Battye Glacier, northern Prince Charles Mountains, East Antarctica, contain prograde metamorphic assemblages comprising various combinations of wollastonite, scapolite, clinopyroxene, An‐rich plagioclase, calcite, quartz, titanite and, rarely, orthoclase, ilmenite, phlogopite and graphite. Comparison of the prograde assemblages with calculated and experimentally determined phase relations in the simple CaO–Al 2 O 3 –SiO 2 –CO 2 –H 2 O system suggests peak metamorphism at ≥835 °C in the presence (in wollastonite‐bearing assemblages at least) of a CO 2 ‐bearing fluid ( X CO ≥0.3) at a probable pressure of 6–7 kbar. Well‐preserved retrograde reaction textures represent: (1) breakdown of scapolite to anorthite+calcite±quartz; (2) formation of grossular–andradite garnet and, locally, (3) epidote, both principally by reactions involving scapolite breakdown products and clinopyroxene; (4) local coupled replacement of clinopyroxene and ilmenite by hornblende and titanite, respectively; and finally (5) local sericitization of prograde and retrograde plagioclase. These retrograde reactions are interpreted to be the result of cooling and variable infiltration by H 2 O‐rich fluids, possibly derived from crystallizing pegmatitic intrusions and segregations that may be partial melts, which are common throughout the area. |
format |
Article in Journal/Newspaper |
author |
STEPHENSON, N. C. N. COOK*, N. D. J. |
author_facet |
STEPHENSON, N. C. N. COOK*, N. D. J. |
author_sort |
STEPHENSON, N. C. N. |
title |
Metamorphic evolution of calcsilicate granulites near Battye Glacier, northern Prince Charles Mountains, East Antarctica |
title_short |
Metamorphic evolution of calcsilicate granulites near Battye Glacier, northern Prince Charles Mountains, East Antarctica |
title_full |
Metamorphic evolution of calcsilicate granulites near Battye Glacier, northern Prince Charles Mountains, East Antarctica |
title_fullStr |
Metamorphic evolution of calcsilicate granulites near Battye Glacier, northern Prince Charles Mountains, East Antarctica |
title_full_unstemmed |
Metamorphic evolution of calcsilicate granulites near Battye Glacier, northern Prince Charles Mountains, East Antarctica |
title_sort |
metamorphic evolution of calcsilicate granulites near battye glacier, northern prince charles mountains, east antarctica |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.1111/j.1525-1314.1997.00024.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1525-1314.1997.00024.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1525-1314.1997.00024.x |
genre |
Antarc* Antarctica Battye Glacier East Antarctica Prince Charles Mountains |
genre_facet |
Antarc* Antarctica Battye Glacier East Antarctica Prince Charles Mountains |
op_source |
Journal of Metamorphic Geology volume 15, issue 3, page 361-378 ISSN 0263-4929 1525-1314 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1525-1314.1997.00024.x |
container_title |
Journal of Metamorphic Geology |
container_volume |
15 |
container_issue |
3 |
container_start_page |
361 |
op_container_end_page |
378 |
_version_ |
1797572255629180928 |