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Acta Petrologica Sinica, 2021
西南三江的德钦-维西地区出露有大量中二叠-晚三叠世岩浆岩，但是它们的形成与两个古特提斯分支洋（即金沙江洋和昌宁-孟连洋）的关系存在很大争议，制约了我们对该地区古特提斯构造演化的理解。本文对得荣县附近的玄武岩和流纹岩、兰坪县附近的安山岩以及德钦县附近的沉火山角砾岩进行了系统的野外地质调查、岩石学和地球化学研究，目的是查明它们的成因和形成环境，为深入探讨古特提斯构造演化提供有力的制约。LA-ICP-MS锆石U-Pb定年结果表明，得荣玄武岩（约236Ma）、兰坪安山岩（约233Ma）以及德钦沉火山角砾岩（约232Ma）均形成于晚三叠世，而得荣流纹岩则形成于中二叠世（约261Ma）。地球化学研究表明，得荣玄武岩多属于拉斑质玄武岩，具有变化的TiO2和MgO含量，缺乏明显的轻重稀土元素分馏，以不同程度亏损Nb、
Liu Fulai
exaly +2 more sources
西南三江的德钦-维西地区出露有大量中二叠-晚三叠世岩浆岩，但是它们的形成与两个古特提斯分支洋（即金沙江洋和昌宁-孟连洋）的关系存在很大争议，制约了我们对该地区古特提斯构造演化的理解。本文对得荣县附近的玄武岩和流纹岩、兰坪县附近的安山岩以及德钦县附近的沉火山角砾岩进行了系统的野外地质调查、岩石学和地球化学研究，目的是查明它们的成因和形成环境，为深入探讨古特提斯构造演化提供有力的制约。LA-ICP-MS锆石U-Pb定年结果表明，得荣玄武岩（约236Ma）、兰坪安山岩（约233Ma）以及德钦沉火山角砾岩（约232Ma）均形成于晚三叠世，而得荣流纹岩则形成于中二叠世（约261Ma）。地球化学研究表明，得荣玄武岩多属于拉斑质玄武岩，具有变化的TiO2和MgO含量，缺乏明显的轻重稀土元素分馏，以不同程度亏损Nb、
Liu Fulai
exaly +2 more sources
Journal of Asian Earth Sciences, 2017
Abstract This study presents coupled zircon U-Pb and Hf isotopic analyses of 82 igneous rocks that are mainly from the Urumieh-Dokhtar magmatic arc (UDMA) and Sanandaj-Sirjan zone (SSZ), Iran, together with additional 11 samples from Armenia, along the central part of the Neotethyan orogenic belt.
Han-Yi Chiu +2 more
exaly +2 more sources
Abstract This study presents coupled zircon U-Pb and Hf isotopic analyses of 82 igneous rocks that are mainly from the Urumieh-Dokhtar magmatic arc (UDMA) and Sanandaj-Sirjan zone (SSZ), Iran, together with additional 11 samples from Armenia, along the central part of the Neotethyan orogenic belt.
Han-Yi Chiu +2 more
exaly +2 more sources
Lithos, 2021
Abstract As a record of ancient subduction, eclogites preserve critical information for exploring geodynamic processes at convergent plate boundaries. The Changning–Menglian orogenic belt (CMOB) in the southeastern Tibetan Plateau is situated between the Gondwana-derived Baoshan–Tengchong Block and the Eurasia-derived Lanping–Simao Block.
Fulai Liu, Jia Cai, Lei Ji
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Abstract As a record of ancient subduction, eclogites preserve critical information for exploring geodynamic processes at convergent plate boundaries. The Changning–Menglian orogenic belt (CMOB) in the southeastern Tibetan Plateau is situated between the Gondwana-derived Baoshan–Tengchong Block and the Eurasia-derived Lanping–Simao Block.
Fulai Liu, Jia Cai, Lei Ji
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Geological Journal
ABSTRACT Porphyry Cu(MoAu) deposits are economically critical mineral resources that form under complex geodynamic regimes, particularly within collisional orogenic belts such as the Sanjiang Tethyan orogen in southwestern China.
Bin Du +5 more
exaly +2 more sources
ABSTRACT Porphyry Cu(MoAu) deposits are economically critical mineral resources that form under complex geodynamic regimes, particularly within collisional orogenic belts such as the Sanjiang Tethyan orogen in southwestern China.
Bin Du +5 more
exaly +2 more sources
Gondwana Research, 2018
Abstract There are many Miocene collision- and subduction-related porphyry Cu deposits in the Eastern Tethyan orogenic belt. However, the petrogenesis of the ore-related magmas and the mechanism of metal enrichment remain controversial. Here, we present a geochemical study and comparison of the major Miocene ore-related porphyries and coeval ore ...
Bo Wan, Morteza Talebian
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Abstract There are many Miocene collision- and subduction-related porphyry Cu deposits in the Eastern Tethyan orogenic belt. However, the petrogenesis of the ore-related magmas and the mechanism of metal enrichment remain controversial. Here, we present a geochemical study and comparison of the major Miocene ore-related porphyries and coeval ore ...
Bo Wan, Morteza Talebian
exaly +2 more sources
Gondwana Research, 2016
Abstract An integrated study involving zircon geochronology, Hf isotopic characteristics and trace elements combined with detailed field investigation was carried out for the felsic magmatic system in the Yangla skarn copper deposit area in the Sanjiang orogenic belt, southwestern China.
Xuyang Meng
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Abstract An integrated study involving zircon geochronology, Hf isotopic characteristics and trace elements combined with detailed field investigation was carried out for the felsic magmatic system in the Yangla skarn copper deposit area in the Sanjiang orogenic belt, southwestern China.
Xuyang Meng
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International Journal of Earth Sciences, 2022
Xianzhi Pei, Zuochen Li, Shaowei Zhao
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Xianzhi Pei, Zuochen Li, Shaowei Zhao
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Multiple Tethyan ocean basins and orogenic belts in Asia
Gondwana Research, 2021Abstract Four Tethyan ocean basins are recognised in Asia, the Proto-Tethys (Late Proterozoic - Silurian), Palaeo-Tethys (Middle Devonian - Late Triassic), Meso-Tethys (Middle Permian - Late Cretaceous) and Ceno-Tethys (late Middle Triassic - Eocene).
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Acta Geologica Sinica - English Edition, 2017
AbstractThe Qushi'ang granodiorite (QSG) is located at the central east of the ophiolitic melange belt in the East Kunlun Orogenic Belt (EKOB) in the northern margin of the Qinghai‐Tibetan Plateau. LA‐MC‐ICP‐MS zircon U–Pb dating suggests that the granodiorite and mafic microgranular enclaves (MMEs) crystallized 246.61±0.62 and 245.45±0.9 Ma ago ...
Guochao CHEN +8 more
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AbstractThe Qushi'ang granodiorite (QSG) is located at the central east of the ophiolitic melange belt in the East Kunlun Orogenic Belt (EKOB) in the northern margin of the Qinghai‐Tibetan Plateau. LA‐MC‐ICP‐MS zircon U–Pb dating suggests that the granodiorite and mafic microgranular enclaves (MMEs) crystallized 246.61±0.62 and 245.45±0.9 Ma ago ...
Guochao CHEN +8 more
openaire +1 more source