A newly discovered Late Cretaceous metamorphic belt along the active continental margin of the Neo-Tethys ocean
文献类型：期刊论文
| 作者 | Wang, Dan2; Fu-Lai Liu2; Palin, Richard1; Jia-Min Wang4; Wo, Mathias3; Ji, Lei2; Wang, Fang2 |
| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2022 |
| 卷号 | 134期号:1-2页码:223-240 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B35900.1 |
| 英文摘要 | High-grade metamorphic rocks and crustal melts provide crucial evidence for growth and differentiation of the continental crust, and are widespread in collisional orogens. However, their importance in the evolution of continental arcs remains poorly understood. Metamorphism and related anatexis in the preserved continental margin of the Neo-Tethys ocean serves as a key natural laboratory to investigate this process. Along the Neo-Tethyan arc margin, the Gaoligong shear zone, Yunnan region of China, is an important locality for linking Lhasa in the north with Sibumasu and Burma in the south. Here, Late Cretaceous granulitefacies metamorphism and crustal anatexis have been identified for the first time in the Gaoligong area. Zircon and monazite U-Pb dating indicates that S-type granites formed at 87-73 Ma, granites and buried pelitic sediments were simultaneously metamorphosed at 75-70 Ma during Neo-Tethyan subduction, and all lithologies were overprinted by a younger 40-30 Ma magmatic and strike-slip event related to India-Asia collision. Phase equilibria modeling of high-grade anatectic gneiss in the MnO-Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O-TiO2 system indicates peak pressure-temperature (P-T) conditions of 780-800 degrees C and 6.5-7.5 kbar and defines a cooling and decompressional P-T path for the metapelites. This demonstrates that sediments within the Neo-Tethyan active conti- nental arc were buried to >20 km depth at 75-70 Ma. In combination with the metamorphic record of the Lhasa, Burma, and Sibumasu blocks, an extensive Late Cretaceous metamorphic belt must have formed along the Neo-Tethyan subduction zone. This spatially correlates with coeval gabbro-diorite suites exposed in the Gangdese, Sibumasu and Burma terranes that were triggered by thinning of the lithospheric mantle. This prolonged Late Cretaceous mantle-derived magmatism and lithospheric thinning may have provided a regional-scale heat source for high-grade metamorphism and crustal anatexis along the active continental margin of the Neo-Tethys ocean. |
| WOS关键词 | RIVER SHEAR ZONE ; ZIRCON U-PB ; EASTERN HIMALAYAN SYNTAXIS ; PARTIAL MELTING EQUILIBRIA ; HF ISOTOPIC CONSTRAINTS ; INDIA-ASIA COLLISION ; S-TYPE GRANITES ; NORTH CASCADES ; TECTONIC EVOLUTION ; WESTERN YUNNAN |
| 资助项目 | National Natural Science Foundation of China[91855206] ; National Natural Science Foundation of China[41372069] ; National Natural Science Foundation of China[41972065] ; National Key Research and Development Project of China[2016YFC0600310] ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences[J2001] ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources[J1901-20-2] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000740439000005 |
| 出版者 | GEOLOGICAL SOC AMER, INC |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/103983]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Wang, Dan |
| 作者单位 | 1.Univ Oxford, Dept Earth Sci, South Parks Rd, Oxford OX1 3AN, England 2.Chinese Acad Geol Sci, Inst Geol, Key Lab Deep Earth Dynam, Minist Nat Resources, Beijing 100037, Peoples R China 3.Univ Basel, Dept Environm Sci Mineral & Petrol, Bernoullistr 30, CH-4056 Basel, Switzerland 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Dan,Fu-Lai Liu,Palin, Richard,et al. A newly discovered Late Cretaceous metamorphic belt along the active continental margin of the Neo-Tethys ocean[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2022,134(1-2):223-240. |
| APA | Wang, Dan.,Fu-Lai Liu.,Palin, Richard.,Jia-Min Wang.,Wo, Mathias.,...&Wang, Fang.(2022).A newly discovered Late Cretaceous metamorphic belt along the active continental margin of the Neo-Tethys ocean.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,134(1-2),223-240. |
| MLA | Wang, Dan,et al."A newly discovered Late Cretaceous metamorphic belt along the active continental margin of the Neo-Tethys ocean".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 134.1-2(2022):223-240. |
入库方式： OAI收割
来源：地质与地球物理研究所
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