| 滇西剑川盆地剑川组岩石特征及火山喷发-沉积期次 |
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| 引用本文： | 覃 琼,徐亚东,郑国栋,张克信,魏明浩. 滇西剑川盆地剑川组岩石特征及火山喷发-沉积期次[J]. 地质科技通报, 2019, 38(5): 165-173 |
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| 作者姓名： | 覃 琼 徐亚东 郑国栋 张克信 魏明浩 |
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| 作者单位： | 中国地质大学（武汉）地球科学学院流域关键带演化实验室;中国地质大学（武汉）地质调查研究院;武平县天盛矿业投资集团有限公司;中南地质科技创新中心;核工业二九〇研究所;重庆地质矿产研究院 |
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| 基金项目： | 国家自然科学基金项目(41302279);中国地质调查局项目(DD20190811;1212011121261;12120113012500) |
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| 摘 要： | 滇西剑川盆地为青藏高原东南缘的一个新生代拉分盆地,其沉积记录和盆缘构造的耦合可以揭示始新世晚期剑川盆地的环境特征。通过分析剑川组岩石特征,得出其物质来源和形成演化,反映剑川组火山岩是大陆造山后(板块碰撞以后)由陆内形成的岩浆喷发活动;通过分析剑川组的岩相特征,得出剑川组火山记录由强到弱表现为明显的特征,下段为火山喷发期次,上段为火山沉积期次。综合岩性岩相结果,得出剑川盆地始新世晚期板块碰撞后期的火山喷发沉积规律。
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| 关 键 词： | 滇西剑川盆地 喷发-沉积期次 岩石特征 |
Rock Characteristics and Volcanic Eruption-Sedimentary Periods of Jianchuan Formation in Jianchuan Basin,Western Yunnan |
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| Qin Qiong,Xu Yadong,Zheng Guodong,Zhang Kexin,Wei Minghao. Rock Characteristics and Volcanic Eruption-Sedimentary Periods of Jianchuan Formation in Jianchuan Basin,Western Yunnan[J]. Bulletin of Geological Science and Technology, 2019, 38(5): 165-173 |
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| Authors: | Qin Qiong Xu Yadong Zheng Guodong Zhang Kexin Wei Minghao |
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| Affiliation: | (Hubei Key Laboratory of Critical Zone Evolution, School of Earth Sciences,China University of Geosciences(Wuhan), Wuhan 430074, China;Geological Survey, China University of Geosciences(Wuhan), Wuhan 430074, China;Wuping County Tiansheng Mining Investment Group Co., Ltd.,Longyan Fujian 364300,China;Geological Science and Technology Innovation Center of Central South China, Wuhan 430074, China;Research Institute No.290, CNNC, Shaoguan Guangdong 512026, China;Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China) |
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| Abstract: | Jianchuan Basin in western Yunnan is a Cenozoic pull-apart basin on the southeast margin of Qinghai-Tibet plateau. The coupling of sedimentary records and basin margin structure can reveal the environmental characteristics of this basin in the late Eocene. The analysis of the rock characteristics of Jianchuan Formation reveals its material source and formation evolution. The result reflects that the volcanic rocks of Jianchuan Formation are formed by magmatic eruption activities in the land after the continental orogeny ( after plate collision ). The analysis of the lithofacies characteristics of Jianchuan Formation concludes that the volcanic record of Jianchuan Formation is obviously cyclicity from strong to weak, with the lower segment showing volcanic eruption cyclicity, and the upper segment showing volcanic sedimentary cyclicity. Based on the lithofacies results, the volcanic eruption and deposition laws in the late Eocene plate collision period in Jianchuan Basin were obtained. |
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| Keywords: | Jianchuan Basin in western Yunnan eruptive-sedimentary cycle rock characteristics |
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