Mesozoic monazite in Neoproterozoic metasediments: Evidence for low-grade metamorphism of Sinian sediments during Triassic continental collision, Liaodong Peninsula, NE China
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- WAN YUSHENG
- Institute of Geology, Chinese Academy of Geological Sciences Beijing SHRIMP Centre
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- SONG TIANRUI
- Institute of Geology, Chinese Academy of Geological Sciences
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- LIU DUNYI
- Institute of Geology, Chinese Academy of Geological Sciences Beijing SHRIMP Centre
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- YANG TIANNAN
- Institute of Geology, Chinese Academy of Geological Sciences
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- YIN XIAOYAN
- Institute of Geology, Chinese Academy of Geological Sciences Beijing SHRIMP Centre
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- CHEN ZHENYU
- Institute of Mineral Resources, Chinese Academy of Geological Sciences
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- ZHANG QIAODA
- Institute of Geology, Chinese Academy of Geological Sciences Beijing SHRIMP Centre
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Abstract
Sericite phyllite from the Sinian Shisanlitai Formation, Dalian area, Liaodong Peninsula, NE China, contains an assemblage of newly-formed lower-greenschist facies minerals (sericite, chlorite, Fe minerals and Ti minerals) plus aggregates of fine-grained monazite. The texture of the monazite, its mineral inclusions, and its close association with Fe oxide minerals show that it is not detrital or diagenetic, but a product of the low-grade metamorphism. SHRIMP U-Th-Pb dating of the monazite at 217 ± 15 Ma shows that the metamorphism, and associated regional deformation and fluid flow, occurred in the Late Triassic, coeval with the waning stages of the Dabie-Sulu orogeny. The Dabie-Sulu tectonothermal event has produced both deformation and metamorphism in rocks of the eastern North China Block at least up to ∼200 km north of the main continent-continent collision zone.
Journal
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- GEOCHEMICAL JOURNAL
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GEOCHEMICAL JOURNAL 41 (1), 47-55, 2007
GEOCHEMICAL SOCIETY OF JAPAN
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Keywords
Details 詳細情報について
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- CRID
- 1390001204551500032
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- NII Article ID
- 10018880156
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- NII Book ID
- AA00654975
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- COI
- 1:CAS:528:DC%2BD2sXltFyrtbc%3D
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- ISSN
- 18805973
- 00167002
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- NDL BIB ID
- 8689863
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed