SHRIMP Zircon U/Pb Dating on Ultrahigh Pressure Rocks from Yangkou: Implications for the Timing of Partial Melting in the Sulu UHP Metamorphic Belt
详细信息
- 责任者：Zeng Lingsen (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Gao Li’e
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(4)
- 关键词：超高压变质岩 ; ultrahigh pressure metamorphic rocks ; 铀—铅计时 ; U-Pb dating ; 部分熔融 ; partial melting ; 苏鲁造山带 ; Su-Lu Orogenic Belt
- 页码：p.1085-1094
- 图表：8 illus., 2 tables, 66 refs.
- 分类号：0802
- 出版序号：863
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Fertile components in UHP rocks could undergo partial melting at both water-present or-absent conditions during deep subduction as well as early stages of rapid exhumation of continental materials. To further constrain the timing of the partial melting events, the authors have carried out SHRIMP zircon U/Pb dating on UHP metapelite as well as concordant K-rich granitic dike from Yangkou, Shandong Province. The result indicates that the Su-Lu UHP metasediments underwent partial melting at ~221 Ma and prior to the widespread amphibolite facies retrograde metamorphism.
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