| 摘要: |
| 本文根据岩性组合、剖面结构及与下伏地层接触关系等特征,认为贵州地区上白垩统茅台组是炎热干燥气候条件下,于燕山构造运动后未曾夷平基面上沉积的河湖相红色磨拉石建造,沉积盆地性质为山间盆地。茅台组现今的大范围零星散布,主要是喜马拉雅运动后遭受长期侵蚀剥蚀造成的。 |
| 关键词: 沉积环境 河湖相磨拉石建造 内陆山间盆地 茅台组 贵州 |
| DOI： |
| 附件 |
| 投稿时间：2014-07-10修订日期：2014-08-20 |
| 基金项目:中国地质调查局贵州省地质系列图件编制与综合研究!(编码:1212010911009)资助 |
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| Sedimentary environments of the Maotai Formation in Guizhou |
| QIN Shou-rong, ZHANG Ming-fa, KUANG Zhong, HUANG Xin-xin, HUANG Wen-jun |
(1. Guizhou Institute of Geological Survey, Guiyang 550005, Guizhou, China;
2. Institute of Regional Geological Survey, Guizhou Bureau of Geology and Mineral Resources, Guiyang 550005, Guizhou, China) |
| Abstract: |
| The Upper Cretaceous Maotai Formation strata are widespread in Guizhou except the Chishui region, with a maximum outcropped area of 25 km2 around the Yuqing region and a residual thickness of about 1440 m along the Rongjiang River. There is a unconformity between the Maotai Formation and underlying Qingbaikouan Xiajiang Group/Danzhou Group-Jurassic strata. Although commonly cropped out along the faults,the Maotai Formation strata are not controlled by the associated faults. Instead,they represent red fluvial-lacustrine molasse formations deposited above the unleveled surfaces in the intracontinental intermontane basins under the xerothermic climatic conditions from the Yanshanian movement onwards. |
| Key words: sedimentary environment fluvial-lacustrine molasse formation intracontinental intermontane basin Maotai Formation Guizhou |
