Methods to estimate the pressure-temperature histories of garnet peridotite and eclogite in the ultrahigh-pressure metamorphic belts: A review of geothermobarometers and their geological applications

• NAEMURA Kosuke

  Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo

• NAKAMURA Daisuke

  Department of Earth Sciences, Faculty of Science, Okayama University

• HIRAJIMA Takao

  Department of Geology and Mineralogy, Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University

Bibliographic Information

Other Title

• 超高圧変成帯中のザクロ石橄欖岩およびエクロジャイトの温度圧力履歴解析法：地質温度圧力計の概説と適用
• チョウコウアツ ヘンセイタイ チュウ ノ ザクロイシカンランガン オヨビ エクロジャイト ノ オンド アツリョク リレキ カイセキホウ : チシツ オンド アツリョクケイ ノ ガイセツ ト テキヨウ

Abstract

  Ultrahigh-pressure (UHP) metamorphic rocks, represented by coesite- or its pseudomorph-bearing eclogites, have been found mainly from continent-continent collision orogenic belts, and garnet peridotite bodies are also known to occur in such UHP belts. The UHP eclogites and garnet peridotite bodies/layers/lenses are commonly enclosed within metamorphic rocks derived from continent crustal materials composed by moderate to low pressure metamorphic minerals, although they should have been located under deep mantle depths (>50 km). Therefore, elucidation of juxtaposition processes between the mantle material and the host crustal material is one of main subjects for the petrology in the UHP belts. Delineating of pressure-temperature (P-T) paths of these UHP garnet peridotite bodies can give us indispensable constraints to clarify the juxtaposition process of mantle and crustal materials in the continent-collision settings and the exhumation processes of deeply subducted rocks with higher density than the crustal rocks. In this paper, we summarize the commonly used methods to determine P-T histories of the UHP garnet peridotite bodies (i.e., geo-thermometer and barometer) and discuss P-T paths of UHP rocks in collision type orogenic belts, and their tectonic significance.<br>

Journal

• Japanese Magazine of Mineralogical and Petrological Sciences

  Japanese Magazine of Mineralogical and Petrological Sciences 41 (6), 225-246, 2012

  Japan Association of Mineralogical Sciences

Keywords

• UHP metamorphism
• Garnet peridotite
• Thermometer
• Barometer
• Pressure-temperature path
• Eclogite

Details

• CRID: 1390282681502947840
• NII Article ID: 10031134512
• NII Book ID: AA1146088X
• DOI: 10.2465/gkk.120531
• ISSN: 13497979
• ISSN: 1345630X
• NDL BIB ID: 024222539
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024222539
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed