| 内蒙古乌斯尼黑蛇绿混杂岩带形成时代的地质新证据 |
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| 引用本文： | 鲍庆中,张长捷,吴之理.内蒙古乌斯尼黑蛇绿混杂岩带形成时代的地质新证据[J].地质与资源,2011,20(1):16-20. |
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| 作者姓名： | 鲍庆中 张长捷 吴之理 |
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| 作者单位： | 1. 沈阳地质矿产研究所, 辽宁 沈阳 110034;2. 内蒙古地质矿产勘查院, 内蒙古 呼和浩特, 010010 |
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| 基金项目： | 中国地质调查局地质调查项目 |
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| 摘 要： | 贺根山-乌斯尼黑蛇绿混杂岩带的属性和形成时代存在明显的认识上的分歧.早期认为是二叠纪侵入的超镁铁质岩体.该超镁铁质岩体侵入了下二叠统格根敖包组,并被哲斯组地层不整合覆盖,形成时代为二叠纪.20世纪80年代以来,通过中国北方板块构造研究,在硅质岩中采集到的一系列化石资料表明,贺根山地区蛇绿混杂岩的形成时代应为中-晚泥盆世...
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| 关 键 词： | 蛇绿混杂岩带 古风化壳 不整合面 形成时代 地质证据 乌斯尼黑 内蒙古 |
| 收稿时间： | 2010-12-29 |
NEW GEOLOGICAL EVIDENCES FOR THE FORMING AGE OF WUSINIHEI OPHIOLITIC MELANGE IN INNER MONGOLIA |
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| BAO Qing-zhong,ZHANG Chang-jie,WU Zhi-li.NEW GEOLOGICAL EVIDENCES FOR THE FORMING AGE OF WUSINIHEI OPHIOLITIC MELANGE IN INNER MONGOLIA[J].Geology and Resources,2011,20(1):16-20. |
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| Authors: | BAO Qing-zhong ZHANG Chang-jie WU Zhi-li |
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| Institution: | 1. Shenyang Institute of Geology and Mineral Resources, Shenyang 110032, China;2. Inner Mongolia Institute of Geology and Mineral Resources Exploration, Hohhot 010010, China |
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| Abstract: | Arguments remain on the structure environment and forming age of the Hegenshan-Wusinihei ophiolitic mélange.It used to be considered the ultramafic intrusive rock into the Permian Gegenaobao formation,covered unconformably by Zhesi formation.Since 1980s,with the discovery of radiolarian fossils in associated silicalite,the ophiolitic mélange was dated Early-Middle Devonian or earlier.During field survey,the authors found paleo-weathering crust on the top of the rock series and disconformity between the ophiolitic mélanges and Gegenaobao formation of Late Carboniferous-Early Permian.Therefore the ophiolitic mélange should be formed before Late Carboniferous. |
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| Keywords: | ophiolitic mélanges belt paleo-weathering crust unconformity forming age geological evidence Wusinihei in Inner Mongolia |
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