| 青藏高原渐新世构造岩相古地理 |
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| 引用本文： | 徐亚东,张克信,陈锐明,张楗钰.青藏高原渐新世构造岩相古地理[J].地质通报,2013,32(1):44-55. |
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| 作者姓名： | 徐亚东 张克信 陈锐明 张楗钰 |
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| 作者单位： | 1.中国地质大学生物地质与环境地质国家重点实验室，湖北 武汉 430074；
2.中国地质大学（武汉）地球科学学院，湖北 武汉 430074；
3.中国地质调查局西安地质矿产研究所，陕西 西安 710054；
4.中国地质调查局武汉地质矿产研究所，湖北 武汉 430205 |
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| 基金项目： | 中国地质调查局项目《青藏高原新近纪隆升过程与地质事件群研究》(编号:1212011121261);《全国重要矿产成矿地质背景研究》(编号:1212010733802);中央高校基本科研业务费专项资金《青藏高原南部新近纪古气候和古海拔重建研究》(编号:CUG110805) |
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| 摘 要： | 在研究区已发表的渐新统资料的基础上,分析了青藏高原渐新世残留盆地的构造背景、岩石地层序列,并对青藏高原渐新世构造岩相古地理特征进行了讨论,该时期总体地势格局仍为东高西低,塔里木、柴达木、羌塘、可可西里、成都等地区主体表现为大面积的压陷湖盆沉积,冈底斯、喜马拉雅和喀喇昆仑等大面积隆升,沿雅鲁藏布江自东向西的古雅江河形成。渐新世构造岩相古地理的演化特征揭示出该时期青藏高原及邻区构造隆升与沉积响应的耦合关系,划分出2个强隆升期,分别是强隆升期A(34～30Ma)和强隆升期B(25～23Ma)。
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| 关 键 词： | 岩相古地理 渐新世 构造隆升 青藏高原 |
Oligocene tectonic lithofacies paleogeography of the Tibetan Plateau |
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| XU Ya-dong,ZHANG Ke-xin,CHEN Rui-ming,ZHANG Jian-yu.Oligocene tectonic lithofacies paleogeography of the Tibetan Plateau[J].Geologcal Bulletin OF China,2013,32(1):44-55. |
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| Authors: | XU Ya-dong ZHANG Ke-xin CHEN Rui-ming ZHANG Jian-yu |
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| Institution: | 1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, Hubei, China;
2. Faculty of Earth Sciences, China University of Geosciences (Wuhan) , Wuhan 430074, Hubei, China;
3. Xi'an Center of Geological Survey, China Geological Survey, Xi`an 710054, Shaanxi, China;
4. Wuhan Center of Geological Survey, China Geological Survey, Wuhan 430205, Hubei, China |
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| Abstract: | Based on the data obtained from 1:250 000 geological mapping conducted by CGS during 1996-2008 and the previous studies of Oligocene strata, the authors investigated the evolution of the Oligocene tectonic lithofacies paleogeography in the Tibetan Plateau. The paleogeographic configuration remained high in elevation on the eastern side and low in the western side; depressed basins were distributed in Tarim, Qaidam, Qiangtang, Hoh Xil and Chengdu; uplifted and erosional areas lay in Gangdisê, Himalayan and Karakorum; and the paleo-Yarlung Zangbo River flowed from eastern Nang County to western Khalatse. The evolution characteristics of the Oligocene tectonic-lithofacies paleogeography responded to the tectonic uplift of the Tibetan Plateau, with two strong uplift stages existent during 34-30Ma (Stage A) and 25-23Ma (Stage B). |
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| Keywords: | lithofacies paleogeography Oligocene tectonic uplift Tibetan Plateau |
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