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| 东准噶尔卡拉麦里断裂带的地质特征及其对中亚地区晚古生代洋陆格局重建的约束 | |
| 引用本文： | 李锦轶,杨天南,李亚萍,朱志新.东准噶尔卡拉麦里断裂带的地质特征及其对中亚地区晚古生代洋陆格局重建的约束[J].地质通报,2009,28(12):1817-1826. |
| 作者姓名： | 李锦轶 杨天南 李亚萍 朱志新 |
| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037 2. 中国地质科学院地质研究所,北京,100037;中国地质调查局发展研究中心,北京,100037 3. 中国地质科学院地质研究所,北京,100037;新疆地质调查研究院,新疆,乌鲁木齐,830000 |
| 基金项目： | 国家"973"项目课题《大型断裂系统与古构造格局改造》，《中亚型造山与成矿综合研究》，中国地质调查局国土资源大调查工作项目《中美矿产资源对比研究》，《全国重要矿产成矿地质背景研究》，《中国北方及邻区大型断裂活动历史及其对古构造-成矿格局的改造》，《东天山地区构造格架研究》 |
| 摘 要： | 卡拉麦里断裂带是新疆北部乃至中亚地区一条显著的大型断裂带，是在古生代洋盆关闭以后形成的。对于其前身古洋盆关闭过程中的古洋岩石圈板块的俯冲极性，在地质界有单向俯冲和双向俯冲2种对立的认识，对于该带是否是不同古板块之间的缝合带也存在截然不同的论点。根据２０多年来的研究积累和对前人资料的综合研究，简要地论述了该断裂带及其南侧地区的地质组成和构造变形特征，提出了该带是弧后盆地关闭的遗迹，其南侧为弧后盆地被动边缘，在该弧后盆地关闭的过程中古洋岩石圈板块向北俯冲的论点。最后，简要地探讨了该带对东准噶尔古构造－成矿格局演变和中亚地区古生代洋陆格局重建的制约。 |
| 关 键 词： | 卡拉麦里断裂带 弧后盆地被动陆缘 前陆褶皱冲断带变形 向北单向俯冲 古构造－成矿格局的改造 |
Geological features of the Karamaili faulting belt, eastern Junggar region, Xinjiang, China and its constraints on the reconstruction of Late Paleozoic ocean-continental framework of the Central Asian region. |
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| LI Jin-yi,YANG Tian-nan,LI Ya-ping,ZHU Zhi-xin.Geological features of the Karamaili faulting belt, eastern Junggar region, Xinjiang, China and its constraints on the reconstruction of Late Paleozoic ocean-continental framework of the Central Asian region.[J].Geologcal Bulletin OF China,2009,28(12):1817-1826. | |
| Authors: | LI Jin-yi YANG Tian-nan LI Ya-ping ZHU Zhi-xin |
| Institution: | 1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;2. Development and Research Centre, China Geological Survey, Beijing 100037, China;3. Xinjiang Institute of Geological Survey, ürümqi 830000, Xinjiang, China |
| Abstract: | The Karamaili faulting belt is well-known in the Northern Xinjiang and Central Asian area, and it came into being after the closure of the Paleozoic ocean. It has been a hot-debated issue on the ancient subduction polarity of the zone as well as whether it's a suturing belt among different ancient plates. Based on our investigation and indoor research of previous literatures during the past 20 years, this paper has briefly stated major geological features of the belt and its adjacent region, and put forward to some new points that the ocean, precursor of the belt, with remark of Karamaili ophiolite belt was a back-arc basin, that the region south of the belt was part of passive margin of the basin, and that the oceanic lithospheric plate was subducted northwards in the period of closure of the basin. Finally, the constraints of the belt on the distortion of ancient tectonic as well as metallogenic framework of the East Junggar region and the reconstruction of Paleozoic ocean-continent framework of the Central Asian region are briefly discussed. |
| Keywords: | Karamaili faulting belt passive margin of back-arc basin structural deformation similar to foreland fold-thrust belt northward subduction distortion of ancient tectonic-metallogenic framework |
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