A review of the Paleozoic tectonics in the eastern part of Central Asian Orogenic Belt
A review of the Paleozoic tectonics in the eastern part of Central Asian Orogenic Belt
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DOI：
10.1016/j.gr.2016.03.013
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发表时间：
2017-03
影响因子：
6.1
通讯作者：
Yong‐jiang Liu;Weimin Li;Zhiqiang Feng;Quanbo Wen;F. Neubauer;Chenyue Liang
中科院分区：
文献类型：
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作者：
Yong‐jiang Liu;Weimin Li;Zhiqiang Feng;Quanbo Wen;F. Neubauer;Chenyue Liang
中亚造山带（CAOB）是世界上最大的增生造山带，是中生代地壳生长的主要场所。中国东北及邻区构成了中国大陆板块构造带的东段，是研究中国大陆板块构造带演化和认识东北亚洲构造的重要依据。CAOB东段构造上由额尔古纳地块（EB）、兴安地块（XB）、松辽-锡林浩特地块（SXB）、佳木斯地块（JB）、新林-锡贵图缝合带（XXS）、黑河-鹤根山缝合带（HHS）、牡丹江-依兰缝合带（MYS）和索伦克-萨尔木伦-长春-延吉缝合带（SXCYS）4个微地块和4条缝合带组成。EB和XB在约1000年经向西俯冲、洋岛增生和最后碰撞而合并。五百毫安XB和SXB是由与俯冲相关的早古生代边缘弧、晚古生代边缘弧和早石炭世晚期至晚石炭世早期的最终碰撞合并而成的。JB可能在早古生代时与SXB相连，但在三叠纪时与SXB分离，并在侏罗纪时碰撞。早古生代至晚古生代，古亚洲洋的闭合经历了一个长期的、持续的、幕式的俯冲-增生过程。最后的闭合发生在沿着南天山，西起索隆克、苏尼特右旗、克什科腾旗、萨尔木伦河，经开鲁、通辽、科尔沁左翼中旗、长春，东至磐石、桦甸、敦化、延吉，时间上西至晚二叠世-早三叠世，东至晚二叠世-中三叠世，呈剪刀式闭合。早石炭世以后，这些块体拼合成一个小陆块，西北以蒙古-鄂霍次克缝合带为界，南以索伦克-萨尔木伦-长春缝合带为界，东以蒙古-蒙古缝合带东缘为界，称之为佳木斯-蒙古块体（JMB）。
The Central Asian Orogenic Belt (CAOB) is the largest accretionary orogen in the world, which is responsible for considerable Phanerozoic juvenile crustal growth. The NE China and its adjacent areas compose the eastern segment of the CAOB, which is a key area for providing important evidence of the CAOB evolution and understanding the NE Asian tectonics. The eastern segment of the CAOB is composed tectonically of four micro-blocks and four sutures, i.e. Erguna block (EB), Xing'an block (XB), Songliao-Xilinhot block (SXB), Jiamusi block (JB), Xinlin-Xiguitu suture (XXS), Heihe-Hegenshan suture (HHS), Mudanjiang-Yilan suture (MYS) and Solonker-Xar Moron-Changchun-Yanji suture (SXCYS). The EB and XB were amalgamated by westward subduction, oceanic island accretions and final collision in ca. 500 Ma. The XB and SXB were amalgamated by subduction-related Early Paleozoic marginal arc, Late Paleozoic marginal arc and final collision in the late Early Carboniferous to early Late Carboniferous. The JB probably had been attached to the SXB in the Early Paleozoic, but broken apart from the SXB in the Triassic and collided back in the Jurassic. The closure of Paleo-Asian Ocean had experienced a long continue/episodic subduction–accretion processes on margins of the NCC to the south and the SXB to the north from the Early to Late Paleozoic. The final closure happened along the SXCYS, from west Solonker, Sonid Youqi, Kedanshan (Keshenketengqi), Xar Moron River through Songliao Basin via Kailu, Tongliao, Horqin Zuoyizhongqi, Changchun, to the east Panshi, Huadian, Dunhua, Yanji, with a scissors style closure in time from the Late Permian-Early Triassic in the west to the Late Permian-Middle Triassic in the east. The amalgamated blocks should compose a united micro-continent, named as Jiamusi-Mongolia Block (JMB) after Early Carboniferous, which bounded by Mongo-Okhotsk suture to the northwest, Solonker-Xar Moron-Changchun suture to the south and the eastern margin of JB to the east.