南漳县西部梁山组富锂黏土岩沉积环境分析
Analysis of the Sedimentary Environment of Lithium-Rich Clay Rocks in the Liangshan Formation in the Western Part of Nanzhang County
闫博 1董义方 1蒋臣1
作者信息
- 1. 湖北省地质局第八地质大队;汉江流域资源环境研究中心,湖北 襄阳 441002
- 折叠
摘要
南漳县位于湖北省西北部,隶属于襄阳市,地处汉江以南、荆山东麓,居于鄂西北山区向汉江中游过渡的地带,矿产资源丰富.通过研究南漳县西部梁山组富锂黏土岩微量元素地球化学特征,初步揭示梁山组富锂黏土岩的沉积环境特征.研究区梁山组富锂黏土岩中,Rb/K含量比为 0.002 7～0.005 8,平均值为 0.004 3;Sr/Ba含量比为 0.65～4.76,平均值为 1.55;Sr含量为 32.2～728.0 mg/kg,平均值为190 mg/kg;大多数样品Ba含量均小于300 mg/kg,显示梁山组富锂黏土岩沉积时水体为淡水-微咸水环境.研究区梁山组富锂黏土岩中,U/Th含量比为0.21～0.60,V/(V+Ni)含量比为0.73～0.94,平均值为0.86,显示弱氧化还原的沉积环境.样品中,Sr含量指示梁山组富锂黏土岩沉积时水体温度为 30℃左右.多数样品Sr/Cu含量比为 0.95～5.89,总体显示出湿热气候特征.
Abstract
Nanzhang county is located in the northwest of Hubei province,under the jurisdiction of Xiangyang city,it is situated south of the Hanjiang River and at the eastern foot of the Jingshan Mountain,in the transitional zone from the mountainous area of northwest Hubei to the middle reaches of the Hanjiang River,it is rich in mineral resources.By studying the geochemical characteristics of trace elements in the lithium-rich clay rocks of the Liangshan formation in the western part of Nanzhang county,this paper preliminarily reveals the sedimentary environment characteristics of the lithium-rich clay rocks of the Liangshan formation.In the lithium-rich clay rock of the Liangshan formation in the research area,the Rb/K content ratio is 0.002 7～0.005 8,with an average value of 0.004 3;the Sr/Ba content ratio is 0.65～4.76,with an average value of 1.55;the Sr content is 32.2～728.0 mg/kg,with an average value of 190 mg/kg;most samples have Ba content less than 300 mg/kg,indicating that during the deposition of lithium-rich clay rocks in the Liangshan formation,the water body is in a freshwater-brackish water environment.In the lithium-rich clay rocks of the Liangshan formation in the research area,the U/Th content ratio is 0.21～0.60,the V/(V+Ni)content ratio is 0.73～0.94,and the average value is 0.86,indicating a weak redox sedimentary environment.In the sample,the Sr content indicates that the water temperature during the deposition of lithium-rich clay rocks in the Liangshan formation is around 30℃.The majority of samples have Sr/Cu content ratios ranging from 0.95 to 5.89,indicating overall humid and hot climate characteristics.
关键词
梁山组/富锂黏土岩/沉积环境/微量元素/地球化学/南漳县Key words
Liangshan formation/lithium-rich clay rock/sedimentary environment/trace elements/geochemistry/Nanzhang county引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据