中国东部苏鲁造山带的印支期俯冲极性及其造山过程
中国东部苏鲁造山带的印支期俯冲极性及其造山过程
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LI Sanzhong , ZHENG Qiliang , LI Xiyao , ZHAO Shujuan , SUO Yanhui , GUO Lingli , WANG, Yongming , ZHOU Zaizheng , LIU, Xiaoguang , LAN Haoyuan , ZHANG, Jian , GUO Runhua and LI, Shaojun
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Beijing: Marine Geology and Quaternary Geology
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Chinese
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Beijing: Marine Geology and Quaternary Geology
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中国东部的苏鲁造山带印支期先后经历了大洋消减俯冲、大陆碰撞、陆壳深俯冲、陆内造山等复杂过程。综合苏鲁造山带的构造地质学、岩石学、岩相古地理学、年代学进展,发现以下事实用传统的华南向华北俯冲难以解释:(1)徐淮地区形成了明显的朝北西拓展的逆冲构造变形,此外,苏鲁造山带中还存在大量的北西向逆冲推覆构造;(2)苏鲁造山带中出露的白垩纪花岗岩中来自古元古代的继承锆石,以及Sr、Nd、Pb同位素示踪结果都显示与华北地块南缘地质体更为相似;(3)苏鲁造山带北侧的胶莱盆地以及胶北隆起缺乏晚古生代到中生代的弧后火山岩证据;(4)华北南缘三叠纪时期的古地理环境更接近被动大陆边缘。基于这些事实,本文认为,晚古生代-早三叠世早期苏鲁段的商丹洋可能向南东俯冲,不同于秦岭-大别段的商丹洋向北俯冲,消减到秦岭-大别微陆...
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中国东部苏鲁造山带的印支期俯冲极性及其造山过程
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TN_cdi_proquest_journals_2754190164
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https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_proquest_journals_2754190164
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ISSN
0256-1492
DOI
10.16562/j.cnki.0256-1492.2017.04.002