| 佳木斯地块及邻区早古生代——晚中生代构造演化 |
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| 引用本文： | 张夺,刘永江,李伟民,温泉波,吴迪升.佳木斯地块及邻区早古生代——晚中生代构造演化[J].世界地质,2018,37(4):1149-1166. |
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| 作者姓名： | 张夺 刘永江 李伟民 温泉波 吴迪升 |
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| 作者单位： | 1. 吉林大学地球科学学院, 长春 130061;2. 中国海洋大学海洋地球科学学院, 山东 青岛 266100;3. 海底科学与探测技术教育部重点实验室, 山东 青岛 266100;4. 吉林省区域地质矿产调查所, 长春 130061 |
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| 基金项目： | 国家重点研发计划深地项目（2017YFC0601300-01）、科技部973课题项目（2013CB429802）、青年基金项目（41302175）联合资助. |
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| 摘 要： | 为厘清嘉荫—牡丹江缝合带的形成时代,确定佳木斯地块早古生代—晚中生代构造演化过程,笔者对佳木斯地块及邻区出露的一些特征岩石的相关资料进行了收集与系统分析。分析结果显示,黑龙江杂岩外来岩块原岩具有类似蛇绿岩的特征,锆石U--Pb年龄结果显示其形成时代为257～210 Ma,云母及蓝闪石Ar--Ar年龄显示基质与外来岩块共同发生高压变质与退变质事件的时间为193～145 Ma,结合出露于佳木斯地块与松嫩地块的早古生代-早侏罗世火成岩地球化学特征及锆石U-Pb年龄,提出佳木斯地块与松嫩地块间经历了早古生代拼合—二叠纪末期三叠纪裂解—侏罗纪-白垩纪初期再次拼合的构造演化过程。古太平洋板块向西的俯冲作用,驱动了其最终的拼合,形成了以黑龙江杂岩为标志的嘉荫—牡丹江缝合带。
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| 关 键 词： | 锆石U-Pb年龄 Ar-Ar年龄 地球化学 佳木斯地块 古生代 中生代 构造演化 |
| 收稿时间： | 2018-01-14 |
| 修稿时间： | 2018-11-08 |
Early Paleozoic-Late Mesozoic tectonic evolution in Jiamusi Block and adjacent areas |
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| ZHANG Duo,LIU Yong-jiang,LI Wei-min,WEN Quan-bo,WU Di-sheng.Early Paleozoic-Late Mesozoic tectonic evolution in Jiamusi Block and adjacent areas[J].World Geology,2018,37(4):1149-1166. |
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| Authors: | ZHANG Duo LIU Yong-jiang LI Wei-min WEN Quan-bo WU Di-sheng |
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| Institution: | 1. College of Earth Sciences, Jilin University, Changchun 130061, China;2. College of Marine Geosciences, Ocean University of China, Qingdao 266100, Shandong, China;3. Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Qingdao 266100, Shandong, China;4. Regional Geological and Mineral Resources Survey of Jilin Province, Changchun 130061, China |
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| Abstract: | In order to clarify the formation age of Jiayin-Mudanjiang suture and determine the Early Paleozoic-Late Mesozoic tectonic evolution of the Jiamusi Block (JB), the authors summarized and analyzed previously reported data on some characteristic rocks exposed on JB and adjacent areas. The analysis results show that the protolith of the exotic rock blocks in Heilongjiang complex has the characteristics of ophiolite with the formation age of 257~210 Ma. The mica and glaucophane Ar-Ar ages show that the time of high-pressure metamorphism and retrograde metamorphism events of the matrix and exotic rock blocks occurred between 193 Ma and 145 Ma. Combined with the geochemical characteristics and the zircon U-Pb ages of the Early Paleozoic-Early Jurassic igneous rocks exposed on the Jiamusi and Songnen blocks (JB and SB), the authors proposed an amalgamation model of JB and SB. In Early Paleozoic, the JB and SB amalgamated, after that, JB broke-up from SB during Late Permian to Early Triassic, followed by the final amalgamation with SB during Jurassic to Early Cretaceous. The last amalgamation was driven by the westward subduction of Paleo-Pacific, leading to the formation of Jiayin-Mudanjiang suture which is marked by Heilongjiang complex. |
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| Keywords: | zircon U-Pb ages Ar-Ar ages geochemistry Jiamusi Block Paleozoic Mesozoic tectonic evolution |
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