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| 黔北地区铝土矿形成的地质时代 | |
| 引用本文： | 黄兴,张雄华,杜远生,覃永军,翁申富,雷志远,郄文昆,蒋涛.黔北地区铝土矿形成的地质时代[J].地质科技情报,2012,31(3):49-54. |
| 作者姓名： | 黄兴 张雄华 杜远生 覃永军 翁申富 雷志远 郄文昆 蒋涛 |
| 作者单位： | 1. 中国地质大学地球科学学院,武汉,430074 2. 贵州省地质调查院,贵阳,550005 3. 贵州省地质矿产勘查开发局106地质大队,贵州遵义,563000 |
| 基金项目： | 贵州省地勘基金公益性、基础性项目 |
| 摘 要： | 在黔北地区铝土矿层之下的黄龙组灰岩中采获了大量时代意义很强的(蜓)类及非(蜓)有孔虫化石.经鉴定,这些化石包括(蜓)类5属13种,另有3个未定种,非(蜓)有孔虫8属17种,另有9个未定种.在此基础上建立了两个(蜓)带,自下而上为Pseudostaffella antiqua带和Profusulinella带,由此确定铝土矿层之下黄龙组时代为晚石炭世滑石板期至达拉期早期.此外,通过对区域上石炭纪至二叠纪层序地层及海平面变化的分析研究,确定研究区石炭纪末至中二叠世栖霞期早期为当时区域上海平面下降幅度最大的时期,继而判断铝土矿的形成时代应为石炭纪末至中二叠世栖霞期早期. |
| 关 键 词： | 黔北 黄龙组 铝土矿 沉积时代 |
Age of Bauxite Forming in Northern Guizhou |
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| HUANG Xing , ZHANG Xiong-hua , DU Yuan-sheng , QIN Yong-jun , WENG Shen-fu , LEI Zhi-yuan , QIE Wen-kun , JIANG Tao.Age of Bauxite Forming in Northern Guizhou[J].Geological Science and Technology Information,2012,31(3):49-54. | |
| Authors: | HUANG Xing ZHANG Xiong-hua DU Yuan-sheng QIN Yong-jun WENG Shen-fu LEI Zhi-yuan QIE Wen-kun JIANG Tao |
| Institution: | 1(1.Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074,China; 2.Guizhou Institute of Geological Survey,Guiyang 550005,China;3.106 Geological Party,Guizhou Bureau of Geology and Mineral Exploration & Development,Zunyi Guizhou 563000,China) |
| Abstract: | Bauxite with very high industrial value distributes widely in Wuchuan-Zheng′an-Daozhen region,northern Guizhou,which is overlain by Liangshan Formation of Middle Permian.The formation age of the bauxite in this area remains controversial so far.Huanglong Formation below the ore-bearing strata can be grouped in ascending order into two zones based on the fusulinids(including 13 species,3 undetermined species in 5 genus) and foraminiferas(including 17 species,9 undetermined species in 8 genus) identified here: 1) Pseudostaffella antiqua zone;2) Profusulinella zone.These two zones indicate that the age of Huanglong Formation here is early Dalaun stage of Late Carboniferous.Based on the comprehensive analysis and correlation of the sequence stratigraphy and sea level change in this region,we suggest that the interval from Late Carboniferous to Early Chihsian stage of Middle Permain is in the time with maximum sea level decline,which facilitates the formation of bauxite. |
| Keywords: | northern Guizhou Huanglong Formation bauxite formation age |
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