现代地质2024，Vol.38Issue(4)：1134-1146,13.DOI:10.19657/j.geoscience.1000-8527.2023.088
新疆吾合沙鲁铜矿床含铜岩系安居安组下段砂岩粒度特征与沉积环境分析
Grain-sizeCharacteristics and Sedimentary Environment Analysis of the Lower Member of the Anju'an Formation,A Copper-bearing Rock Series at the Shalu Copper Deposit,Wuhe,Xinjiang
摘要
Abstract
The Wuhe Shalu copper deposit is located at the northern margin of the Wuqia foreland basin in the Tianshan Mountains,Southwest Xinjiang.Large sets of Meso-Cenozoic continental sand bodies are deposited in this basin,forming important ore-bearing rock series of lead,zinc,copper,uranium,and other sandstone-type deposits.The lack of sedimentological studies on this deposit has long restricted the understanding of regional metallogeny and hindered mineral exploration.Therefore,this paper uses the Wuhe Shalu copper deposit as a case study,focusing on the clastic sedimentary rocks of the Neogene Miocene Anju'an Formation containing cop-per.This study primarily uses methods from sedimentology,sequence stratigraphy,lithofacies paleogeography,and clastic petrology.Samples for grain-size analysis of the lower member of Anju'an Formation in the mining area were systematically collected.Grain-size analysis and analytical methods of clastic rock were used to con-duct in-depth research on the sediments in the mining area.The results show that the sedimentary facies type of Anju'an Formation is consistent with that of braided river delta.We identified two sedimentary subfacies:brai-ded river delta plain and braided river delta front.In addition,we recognized six sedimentary microfacies in each lithologic segment:distributary channel sand bar,natural embankment on land,underwater distributary channel,interdistributary bay,estuarine sand bar,and far sand bar.The lower part of the Anju'an Formation is the main copper-rich horizon in the study area.The microfacies of the underwater distributary channel and the distributary channel sand bar are key targets for copper exploration in the Wuhe Shalu area.The sudy results provide a prospecting strategy for resource prediction on both sides and the periphery of the Wuhe Shalu copper deposit,and also serve as an important reference for searching for sandstone copper deposits in this area.关键词
砂岩型铜矿/粒度特征/沉积环境/安居安组/吾合沙鲁/乌恰盆地Key words
sandstone-type copper deposit/grain size characteristic/sedimentary environment/Anju'an For-mation/Wuhe Shalu/Wuqia Basin分类
天文与地球科学引用本文复制引用
柳坤峰,冯昌荣,徐磊,祁晓鹏,蔡振锋,谢晋,翟黎明,雷浩..新疆吾合沙鲁铜矿床含铜岩系安居安组下段砂岩粒度特征与沉积环境分析[J].现代地质,2024,38(4):1134-1146,13.基金项目
2013年中央返还两权价款资金项目(T14-1-LQ01) （T14-1-LQ01）
2016年中央返还两权价款资金项目(T16-2-LQ20) （T16-2-LQ20）
2017年新疆地质勘查基金招标项目(T17-3-XJ011). （T17-3-XJ011）
