摘要
青海省那陵格勒河中游地区位于秦—祁—昆成矿域东昆仑成矿省祁漫塔格—都兰华力西期铁、钴、铜、铅、锌、锡、硅灰石(锑、铋)成矿带,该区及其周边已发现金属矿床(点)几十处,具有良好的金、铁、铅、锌、铜、镍矿找矿前景。本研究基于对该区水系沉积物样品新测试获取的20种元素,统计分析元素分布与特征参数,由此总结富集离散规律、元素组合特征及其与成矿地质条件的关系。研究结果显示:白沙河(岩)组中Pb、Bi、Zn明显富集,成矿指数较高,滩间山群中显著富集Cu、Cr、Ni、Co、V,印支期中酸性高温岩浆活动可以为地层中Cu、Pb、Zn等金属元素的活化提供充足的热动力。地层与印支期中酸性岩浆接触交代形成的矽卡岩带,可作为寻找矽卡岩型Cu、Pb、Zn多金属矿床的有利部位。结合成矿地质条件和地球化学特征,总计圈定了39处地球化学综合异常,并划分出5处找矿远景区,其中野马泉—牛苦头—黑山铜、金、锑与克提哈尔—红卫山铜、钴、镍、钒多金属成矿远景区可作为区内重点的铜多金属成矿远景带,具有较大的成矿潜力。本研究为区域多种有色金属矿产靶区优选、资源潜力评价和下一步地质找矿工作提供了参考。
The middle reach of the Nalinggele River in Qinghai Province is located in the Qin-Qi-Kun ore domain and the Variscan Qimantag Dulan Fe-Co-Cu-Pb-Zn-Sn-W ore belt in the eastern Kunlun mineral province.Over ten metal deposits/prospects have been discovered in/around this area,with good prospects for gold,iron,lead,zinc,copper,and nickel exploration.This study is based on the new 20-element analysis on stream sediment samples,and statistical analysis of element distribution and characteristic parameters to summarize the enrichment and dispersion regularities,element assemblage characteristics,and their relationship with metallogenic conditions.The results show that Pb,Bi,and Zn are significantly enriched in the Baishahe Formation,with a high mineralization index.Cu,Cr,Ni,Co,and V are significantly enriched in the Tanjianshan Group.The high-temperature Indosinian felsic magmatic activity could provide sufficient heat for the metal remobilization(e.g.,Cu,Pb,Zn)in the formation.The skarn belt formed by contact metamorphism and metasomatism between the strata and the Indosinian felsic magma represents a favorable site for skarn-type Cu,Pb,Zn polymetallic mineral exploration.In combination with the geological conditions and geochemical characteristics of mineralization,a total of 39 geochemical comprehensive anomalies have been delineated,and 5 prospects have been defined.Among them,the Yemaquan-Niukutou-Heishan Cu-Au-Sb and the Ketihar-Hongweishan Cu-Co-Ni-V polymetallic prospects can be regarded as the key Cu polymetallic metallogenic prospect zone in the region with relatively high metallogenic potential.This study provides a reference for the optimization of multiple non-ferrous metal mineral target areas in the region,resource potential evaluation,and further geological exploration work.
作者
张伟
安茂国
王志鹏
杨启
陈怀鑫
马晓峰
支成龙
邢其涛
裴长世
王娜
刘铭
ZHANG Wei;AN Maoguo;WANG Zhipeng;YANG Qi;CHEN Huaixin;MA Xiaofeng;ZHI Chenglong;XING Qitao;PEI Changshi;WANG Na;LIU Ming(Shandong Provincial Lunan Geology and Exploration Institute(Shandong Provincial Bureau of Geology and Mineral Resources No.2 Geological Brigade),Jining,Shandong 272100,China;Technical Innovation Center for Comprehensive Treatment of Coal Mining Subsidence Area,Ministry of Natural Resources,Jining,Shandong 272100,China;Jining Engineering Research Center for Exploration and Comprehensive Utilization of Three Rare minerals,Jining,Shandong 272100,China;Qinghai Jinxing Mining Co.,Ltd.,Xining,Qinghai 810008,China)
出处
《现代地质》
CAS
CSCD
北大核心
2023年第3期690-707,共18页
Geoscience
基金
山东省重点研发计划项目(2017CXGC1603)
青海省地质调查项目(青地调勘[2013]27号,青地调社[2019]97号)。
关键词
水系沉积物
地球化学
综合异常
找矿远景
那陵格勒河中游地区
青海省
stream sediment
geochemical characteristic
integrated anomaly
ore prospect
middle reach of the Nalinggele River
Qinghai Province
