Zircon U-Pb Age and Geological Implications of Ultramafic Rocks in Changshagou, Altun Area, Xinjiang Province

GUO Jin-cheng; XU Xu-ming; CHEN Hai-yan; LI Xian; DONG Hong-kai; TI Zhen-hai

Northwestern Geology > 2014 > 47(4): 170-177.

GUO Jin-cheng, XU Xu-ming, CHEN Hai-yan, et al. Zircon U-Pb Age and Geological Implications of Ultramafic Rocks in Changshagou, Altun Area, Xinjiang Province[J]. Northwestern Geology, 2014, 47(4): 170-177.

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Zircon U-Pb Age and Geological Implications of Ultramafic Rocks in Changshagou, Altun Area, Xinjiang Province

Hebei Institute of Regional Geological and Mineral Resource Survey, Langfang 065000, China

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Received Date: June 16, 2014
Revised Date: October 23, 2014
Available Online: July 28, 2022
Published Date: December 04, 2014

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Abstract

During 1:50000 scale regional survey, the author discovered that the ultramafic rocks from Altun ophiolite tectonic mixtite belt are mainly composed of plagioclase pyroxene amphibolite, pyroxene peridotite, and serpentinized peridotite. Geochemistry of the diabase shows that the geochemistry of the major is characterized by low contents of SiO₂, CaO, K₂O, Na₂O and high contents of MgO and FeO. With a low DI value (0.35-14.45), the magmatic differentiation is not obvious; while the solidification degree, with a high SI value (47.82-70.05), is relatively high. The ultramafic rocks belong to calcium series and magnesian ultrabasic rock, with the Rittman index of 0.97 and the M/F index from 1.94 to 4.39. Among the compositions, the TiO₂ content in pyroxene peridotite is close to that of mid-ocean ridge mantle(0.10%-0.40%). Characteristics of rare earth element and trace element are similar to those of mantle peridotite. All these characteristics indicate that the ultramafic rock is a part of ophiolite suite derived from the primitive mantle. The plagioclase pyroxene amphibolite may be ultramafic diamictite. Meanwhile, the authors firstly got the U-Pb age (510.60±1.40 Ma) of zircon from pyroxene peridotite and hold that its age is considered to be the Cambrian and it may represent early products of South Altun oceanic basin.
- ultramafic rocks,
- Zircon U-Pb dating,
- geological implications

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郭金城, 徐旭明, 吴永祥, 等. 新疆阿尔金地区1:5万J45E012015、J45E012016、J45E012017、J45E013015、J45E013016、J45E013017六幅区域地质矿调查报告 [R]. 河北省区域地质矿产调查研究所, 2013.

Guo Jincheng, Xu Xuming, Wu Yongxiang, et al. Geological survey report and geological map at scale 1:250000 of Suwushijie Quadrangle [R]. Published by Hebei Institute of Regional Geological and Mineral Resource Survey, 2013.

西安地质矿产研究所. 昆仑—阿尔金成矿带基础地质综合研究报告 [R]. 2012.

Xian Geological Survey, Geological survey report and geological map at scale 1:250000 of Suwushijie Quadrangle [R]. Published by Xian Geological Survey, 2012.

许立权, 邓晋福. 内蒙古达茂旗哈尔陶勒盖地区蛇绿岩形成环境探讨 [J]. 中国地质, 2006, 33(5): 1038-1043.

Xu Liquan, Deng Jinfu. Tectonic environment of ophiolites in the Har Tolgoi area, Damao Qi, Inner Mongolia [J]. Geology in China, 2006, 33(5): 1038-1043.

广西壮族自治区地质调查院. 1:25万瓦石峡幅、古尔嘎幅区域地质调查报告 [R]. 2002.

Guangxi Geological Survey, Geological survey report and geological map at scale 1:250000 of Washixia Quadrangle [R]. Published by Guangxi Geological Survey, 2002

冯益民. 蛇绿岩概念及其构造含义的变化 [J]. 西北地质, 1986, 19(03): 12-15.

Feng Yimin. Ophiolite concept and the change of construct meaning [J]. Northwestern Geology, 1986, 19(03): 12-15.

马中平, 孙吉明, 唐卓, 等. 阿尔金山南缘长沙沟—清水泉一带镁铁-超镁质杂岩体Cu-Ni-PGE含矿性讨论 [J]. 西北地质, 2010, 43(4): 18-24.

Ma Zhongping, Sun Jiming, Tang Zhuo, et al. Discussions on the Magmatic Cu-Ni-PGE Sulfides Mineralization Potential of the Changshagou-Qingshuiquan Layered Ma-fic-Ultramafic Intrusions, Altyn Tagh [J]. Northwes-tern Geology. 2010, 43(4): 18-24.

刘良, 车自成, 王焰, 等. 阿尔金茫崖地区早古生代蛇绿岩的Sm-Nd等时线年龄证据 [J]. 科学通报, 1998, 33(8): 880-883.

Liu Liang, Che Zicheng, Wang yan, et al. Early Palaeozoic ophiolite evidence from Rb-Sr isochron ages of macrocrystalline calcite in Mangya, Altyn Tagh [J]. Chinese Science Bulletin, 1998, 33(8): 880-883.

马中平, 李向民, 孙吉明, 等. 阿尔金山南缘长沙沟镁铁-超镁铁质层状杂岩体的发现与地质意义——岩石学和地球化学初步研究 [J]. 岩石学报, 2009, 25(4): 793-804.

Ma Zhongping, Li Xiangmin, Sun Jiming, et al. Discowery of layered mafic-ultramafic intrusion in Changshagou, Altyn Tagh, and its geological implication: A pilot study on its petrological and geochemical characteristics [J]. Acta Petrologica Sinica, 2009, 25(4): 793-804.

张旗, 李达周, 张魁武, 等. 义敦型镁铁-超镁铁岩的主要特征及其与蛇绿岩的对比 [J]. 岩石学报, 1990, 6(03): 33-42.

Zhang Qi, Li Dazhou, Zhang Kuiwu, et al. The Characteristics of Yidun-type mafic-ultra-mafic rocks and their comparison with ophiolites [J]. Acta Petrologica Sinica, 1990, 6(03): 33-42.

马中平, 李向民, 徐学义, 等. 南阿尔金山清水泉镁铁-超镁铁质侵入体LA-ICP-MS锆石U-Pb同位素定年及其意义 [J]. 中国地质, 2011, 38(4): 1071-1078.

Ma Zhongping, Li Xiangmin, Xu Xueyi, et al. Zircon LA-ICP-MS U-Pb isotopic dating for Qingshuiquan layered mafic-ulmafic intrusion southern Altun orogen, in northwestern China and its implication [J]. Geology in China, 2011, 38(4): 1071-1078.

简平, 刘敦一, 孙晓猛. 滇川西部金沙江石炭纪蛇绿岩SHRIMP测年: 古特地斯洋盆演化的同位素年代学制约 [J]. 地质学报, 2003, 77(2): 217-228.

Jian Ping, Liu Dunyi, Sun Xiaomeng. SHRIMP Dating of Carboniferous Jinshajiang Ophiolite in western Yunnan and Sichuan: Geochronological constraints on the Evolution of the Paleo-Tethys Oceanic Crust [J]. Acta Geologica sinica, 2003, 77(2): 217-228.

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	XIE Juan, YANG Jun, ZHANG Jun. 2001: Survey and evaluation of geological environment in Qaidam Basin. Northwestern Geology, 34(3): 29-34.

Zircon U-Pb Age and Geological Implications of Ultramafic Rocks in Changshagou, Altun Area, Xinjiang Province

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