| 华北与阿拉善两个古陆在早古生代晚期拼合——来自宁夏牛首山沉积岩系的证据 |
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| 引用本文： | 李锦轶,张进,曲军峰.华北与阿拉善两个古陆在早古生代晚期拼合——来自宁夏牛首山沉积岩系的证据[J].地质论评,2012,58(2):208-214. |
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| 作者姓名： | 李锦轶 张进 曲军峰 |
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| 作者单位： | 中国地质科学院地质研究所，北京，100037;中国地质科学院地质研究所，北京，100037;中国地质科学院地质研究所，北京，100037 |
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| 基金项目： | 本文为国家973项目（编号2007CB411306）和中国地质调查局项目（编号1212010711817, 1212010611806,1212011121064，1212011085476）的成果。 |
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| 摘 要： | 华北与阿拉善两个古陆块是何时拼合在一起的,一直是地质界激烈争论的问题.本文报道了宁夏牛首山西南麓出露的泥盆纪与石炭纪地层波痕及斜层理等沉积构造和构造变形方面的新资料,结合前人近年来获得的区域上奥陶纪砂岩碎屑锆石年龄资料,推测华北与阿拉善两个古陆拼合发生在晚奥陶世至泥盆纪早期之间的某一地质时期.
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| 关 键 词： | 牛首山 沉积构造 构造变形 华北与阿拉善拼合时限 |
Amalgamation of North China Craton with Alxa Block in the Late of Early Paleozoic: Evidengce from Sedmentary Sequences in the Niushou Mountain, Ningxia Hui Autonomous Region, NW China |
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| LI Jinyi, ZHANG Jin, QU Junfeng.Amalgamation of North China Craton with Alxa Block in the Late of Early Paleozoic: Evidengce from Sedmentary Sequences in the Niushou Mountain, Ningxia Hui Autonomous Region, NW China[J].Geological Review,2012,58(2):208-214. |
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| Authors: | LI Jinyi ZHANG Jin QU Junfeng |
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| Institution: | Institute of Geology, Chinese Academy of Geological Sciences, Beijing,100037 |
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| Abstract: | It has been a hot-debated issue in geological field when the North China craton was amalgamated with the Alxa block together. This paper reports new data on both the sedimentary structures, such as cross-bedding and ripples, and structural deformation of Devonian and Carboniferous strata exposed in southwest slope of the Niushou Mountain, Ningxia Hui Autonomous Region, NW China. In combination with available debris zircon aging spectrums of Ordovician sandstones, it is supposed that the amalgamation of the North China craton with the Alxa block took place in a geological time between Late Ordovician and Early Devonian. |
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| Keywords: | Niushou Mountain sedimentary structure structural deformation amalgamation of the North China with the Alxa Blocks |
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