摘要
通过对沟里整装勘查区内果洛龙洼、阿斯哈、瓦勒尕、色日等大中型金矿床野外地质调查及相关资料综合研究的基础上,分析了金矿的成矿要素,并探讨了预测意义。研究结果表明:沟里整装勘查区内金矿的形成时代应为印支晚期,成矿受古特提斯洋闭合及向伸展转化的后造山环境制约;金矿与元古宇金水口岩群关系密切,金矿分布区与金水口岩群分布区吻合,推测金水口岩群为金矿的矿源层;印支晚期岩浆作用为金矿的形成提供了热源及成矿物质;多期次断裂与金矿的成矿作用关系密切,香日德—德龙断裂控制金矿的形成和矿体侧伏方向、赋矿标高,是导矿、控矿断裂;北东向、北西向及南北向次级断裂为重要容矿断裂。金矿成矿要素可以归纳为:元古宇金水口岩群、印支晚期岩浆岩和断裂内外接触带三位一体。沟里整装勘查区及周边今后的找矿勘探工作,应围绕香日德—德龙断裂两侧、早—中三叠世花岗闪长岩及金水口岩群寻找金矿;深部找矿应根据矿体侧伏规律布置钻孔等勘探工程。
Based on the comprehensive study of field geological survey and related data of large and medium-sized gold deposits such as Guoluolongwa,Asiha,Walega and Seri in Gouli integrated exploration area of Qinghai Province,this paper analyzes the metallogenic elements of gold deposits and discusses the significance of prediction.The results show that the formation age of the gold deposits in the area should be late Indosinian,and the mineralization is restricted by the post orogenic environment of the closed collision and extension of the Paleo-Tethys Ocean;Gold deposits are closely related to the Paleoproterozoic Jinshuikou rock group,and the distribution area of gold deposits is consistent with the distribution area of Jinshuikou rock group.It is speculated that the Jinshuikou rock group is the source layer of gold deposits;Late Indosinian magmatism provided heat source and ore-forming materials for the formation of gold deposits;the multi-stage fault structure in the area is closely related to the mineralization of gold deposits,the Xiangride-Delong fault in the area controls the formation of gold deposits,the lateral direction of ore bodies and the ore-bearing elevation,and is the ore-conducting and ore-controlling fault in the area;the NE,NW and SN secondary faults are important ore-bearing faults.The gold metallogenic elements can be summarized as:Paleoproterozoic Jinshuikou rock group,Late Indosinian magmatic rocks,internal and external contact zone fault structure trinity.The prospecting and exploration work in Gouli area and its surrounding area should focus on both sides of the Xiangride-Delong fault,and search for gold deposits in the early-middle Triassic granodiorite and Jinshuikou rock group;drilling and other exploration works should be arranged in deep ore prospecting according to its lateral regulation.
作者
张纪田
张志强
孙国胜
马生贵
李雪
刘根驿
Zhang Jitian;Zhang Zhiqiang;Sun Guosheng;Ma Shenggui;Li Xue;Liu Genyi(College of Earth Sciences,Jilin University;The Third Nonferrous Geological Exploration Institute in Qinghai Province)
出处
《黄金》
CAS
2021年第7期11-16,共6页
Gold
基金
中国地质调查局发展研究中心项目(WKZB1911BJM300369/006,WKZB2011BJM300175/016)
国家自然科学基金项目(41572056)。
关键词
金矿
成矿要素
预测意义
金水口岩群
沟里整装勘查区
gold deposit
metallogenic elements
predictive significance
Jinshuikou rock group
Gouli integrated exploration area
作者简介
张纪田(1993-),男,安徽阜阳人,硕士研究生,研究方向为矿物学、岩石学、矿床学,长春市建设街2199号,吉林大学地球科学学院,130061,E-mail:2452491026@qq.com。
