Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Craton
The North China Craton (NCC) constitutes one of the fundamental Precambrian nuclei of Asia. The Paleoproterozoic khondalite belt along the northern margin of the NCC shows evidence for extreme crustal metamorphism at temperatures exceeding 1000 degrees C and pressures of 10-12 kbar with the formatio...
Published in: | Earth and Planetary Science Letters |
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earth and planetary science letters
2008
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ftpekinguniv:oai:localhost:20.500.11897/249541 2023-05-15T14:05:20+02:00 Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Craton Santosh, M. Tsunogae, T. Ohyama, H. Sato, K. Li, J. H. Liu, S. J. Santosh, M (reprint author), Kochi Univ, Fac Sci, Dept Nat Environm Sci, Akebono-cho 2-5-1, Kochi 7808520, Japan. Kochi Univ, Fac Sci, Dept Nat Environm Sci, Kochi 7808520, Japan. Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan. Tokyo Inst Technol, Dept Earth & Planetary Sci, Tokyo 1528551, Japan. Peking Univ, Dept Geol, Beijing 100871, Peoples R China. Kochi Univ, Fac Sci, Dept Nat Environm Sci, Akebono-cho 2-5-1, Kochi 7808520, Japan. 2008 https://hdl.handle.net/20.500.11897/249541 https://doi.org/10.1016/j.epsl.2007.10.058 en eng earth and planetary science letters EARTH AND PLANETARY SCIENCE LETTERS.2008,266,(1-2),149-165. 963344 0012-821X http://hdl.handle.net/20.500.11897/249541 doi:10.1016/j.epsl.2007.10.058 WOS:000253274500011 EI SCI ultrahigh-temperature granulites fluid inclusions CO2 carbonic metamorphism North China craton Columbia supercontinent PB ZIRCON GEOCHRONOLOGY CRUSTAL METAMORPHISM CHARNOCKITE FORMATION PALEOPROTEROZOIC EVOLUTION PHASE-EQUILIBRIA EAST ANTARCTICA ORTHO-PYROXENE GRANULITES Journal 2008 ftpekinguniv https://doi.org/20.500.11897/249541 https://doi.org/10.1016/j.epsl.2007.10.058 2021-08-01T08:54:34Z The North China Craton (NCC) constitutes one of the fundamental Precambrian nuclei of Asia. The Paleoproterozoic khondalite belt along the northern margin of the NCC shows evidence for extreme crustal metamorphism at temperatures exceeding 1000 degrees C and pressures of 10-12 kbar with the formation of diagnostic ultrahigh-temperature (UHT) mineral assemblages including sapphirine + quartz, high alumina orthopyroxene + sillimanite and high-temperature mesoperthites. Here we record for the first time the common occurrence Of CO2-rich fluid inclusions in peak UHT minerals in the Mg-Al granulites of NCC, and trace the fluid evolution history. From microthermometric and laser Raman spectroscopic studies, we show that the syn-metamorphic fluid in the UHT rocks was pure CO2- While very high density carbonic fluids are preserved in some cases, corresponding to entrapment at peak conditions, many of the inclusions underwent density modification during the rapid and near-isothermal exhumation of the rocks following peak LET metamorphism and initial cooling at depth. The present study area within the northern margin of the NCC defines a collisional orogenic belt where continental collision and deep subduction were possibly followed by extensional collapse of the orogen. Evidence for the extensional phase is provided by the several mafic magmatic intrusions of Paleoproterozoic age that are seen emplaced within the granulite facies supracrustals. The thermal anomaly displayed by the UHT granulites may thus correlate with asthenospheric upwelling and emplacement of mafic magmas, possibly associated with plume activity, which provided the heat and CO2 input to achieve extreme crustal metamorphism and generation of dry granulite facies assemblages. Our study is the first report of syn-metamorphic CO2-rich fluids in UHT granulites from a Paleoproterozoic (ca. 1.92 Ga) terrane and provide evidence for carbonic metamorphism at ultrabigh-temperatures as North China Craton joined the Columbia supercontinent amalgam. (c) 2007 Elsevier B.V. All rights reserved. Geochemistry & Geophysics SCI(E) EI 70 ARTICLE 1-2 149-165 266 Journal/Newspaper Antarc* Antarctica East Antarctica Peking University Institutional Repository (PKU IR) East Antarctica Earth and Planetary Science Letters 266 1-2 149 165 |
institution |
Open Polar |
collection |
Peking University Institutional Repository (PKU IR) |
op_collection_id |
ftpekinguniv |
language |
English |
topic |
ultrahigh-temperature granulites fluid inclusions CO2 carbonic metamorphism North China craton Columbia supercontinent PB ZIRCON GEOCHRONOLOGY CRUSTAL METAMORPHISM CHARNOCKITE FORMATION PALEOPROTEROZOIC EVOLUTION PHASE-EQUILIBRIA EAST ANTARCTICA ORTHO-PYROXENE GRANULITES |
spellingShingle |
ultrahigh-temperature granulites fluid inclusions CO2 carbonic metamorphism North China craton Columbia supercontinent PB ZIRCON GEOCHRONOLOGY CRUSTAL METAMORPHISM CHARNOCKITE FORMATION PALEOPROTEROZOIC EVOLUTION PHASE-EQUILIBRIA EAST ANTARCTICA ORTHO-PYROXENE GRANULITES Santosh, M. Tsunogae, T. Ohyama, H. Sato, K. Li, J. H. Liu, S. J. Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Craton |
topic_facet |
ultrahigh-temperature granulites fluid inclusions CO2 carbonic metamorphism North China craton Columbia supercontinent PB ZIRCON GEOCHRONOLOGY CRUSTAL METAMORPHISM CHARNOCKITE FORMATION PALEOPROTEROZOIC EVOLUTION PHASE-EQUILIBRIA EAST ANTARCTICA ORTHO-PYROXENE GRANULITES |
description |
The North China Craton (NCC) constitutes one of the fundamental Precambrian nuclei of Asia. The Paleoproterozoic khondalite belt along the northern margin of the NCC shows evidence for extreme crustal metamorphism at temperatures exceeding 1000 degrees C and pressures of 10-12 kbar with the formation of diagnostic ultrahigh-temperature (UHT) mineral assemblages including sapphirine + quartz, high alumina orthopyroxene + sillimanite and high-temperature mesoperthites. Here we record for the first time the common occurrence Of CO2-rich fluid inclusions in peak UHT minerals in the Mg-Al granulites of NCC, and trace the fluid evolution history. From microthermometric and laser Raman spectroscopic studies, we show that the syn-metamorphic fluid in the UHT rocks was pure CO2- While very high density carbonic fluids are preserved in some cases, corresponding to entrapment at peak conditions, many of the inclusions underwent density modification during the rapid and near-isothermal exhumation of the rocks following peak LET metamorphism and initial cooling at depth. The present study area within the northern margin of the NCC defines a collisional orogenic belt where continental collision and deep subduction were possibly followed by extensional collapse of the orogen. Evidence for the extensional phase is provided by the several mafic magmatic intrusions of Paleoproterozoic age that are seen emplaced within the granulite facies supracrustals. The thermal anomaly displayed by the UHT granulites may thus correlate with asthenospheric upwelling and emplacement of mafic magmas, possibly associated with plume activity, which provided the heat and CO2 input to achieve extreme crustal metamorphism and generation of dry granulite facies assemblages. Our study is the first report of syn-metamorphic CO2-rich fluids in UHT granulites from a Paleoproterozoic (ca. 1.92 Ga) terrane and provide evidence for carbonic metamorphism at ultrabigh-temperatures as North China Craton joined the Columbia supercontinent amalgam. (c) 2007 Elsevier B.V. All rights reserved. Geochemistry & Geophysics SCI(E) EI 70 ARTICLE 1-2 149-165 266 |
author2 |
Santosh, M (reprint author), Kochi Univ, Fac Sci, Dept Nat Environm Sci, Akebono-cho 2-5-1, Kochi 7808520, Japan. Kochi Univ, Fac Sci, Dept Nat Environm Sci, Kochi 7808520, Japan. Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan. Tokyo Inst Technol, Dept Earth & Planetary Sci, Tokyo 1528551, Japan. Peking Univ, Dept Geol, Beijing 100871, Peoples R China. Kochi Univ, Fac Sci, Dept Nat Environm Sci, Akebono-cho 2-5-1, Kochi 7808520, Japan. |
format |
Journal/Newspaper |
author |
Santosh, M. Tsunogae, T. Ohyama, H. Sato, K. Li, J. H. Liu, S. J. |
author_facet |
Santosh, M. Tsunogae, T. Ohyama, H. Sato, K. Li, J. H. Liu, S. J. |
author_sort |
Santosh, M. |
title |
Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Craton |
title_short |
Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Craton |
title_full |
Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Craton |
title_fullStr |
Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Craton |
title_full_unstemmed |
Carbonic metamorphism at ultrahigh-temperatures: Evidence from North China Craton |
title_sort |
carbonic metamorphism at ultrahigh-temperatures: evidence from north china craton |
publisher |
earth and planetary science letters |
publishDate |
2008 |
url |
https://hdl.handle.net/20.500.11897/249541 https://doi.org/10.1016/j.epsl.2007.10.058 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
EI SCI |
op_relation |
EARTH AND PLANETARY SCIENCE LETTERS.2008,266,(1-2),149-165. 963344 0012-821X http://hdl.handle.net/20.500.11897/249541 doi:10.1016/j.epsl.2007.10.058 WOS:000253274500011 |
op_doi |
https://doi.org/20.500.11897/249541 https://doi.org/10.1016/j.epsl.2007.10.058 |
container_title |
Earth and Planetary Science Letters |
container_volume |
266 |
container_issue |
1-2 |
container_start_page |
149 |
op_container_end_page |
165 |
_version_ |
1766277150071062528 |