吉林大学学报(地球科学版) ›› 2022, Vol. 52 ›› Issue (5): 1525-1539.doi: 10.13278/j.cnki.jjuese.20210404

• 地质与资源 • 上一篇    下一篇

柴北缘阿日特克山斑岩型铜钼矿床流体包裹体、稳定同位素特征及其地质意义

唐名鹰1,2,3,朱德全1,2,丁正江3,4,5,陈建1,2,王炜晓1,2,董振昆1,2,高振华1,2,苗晓军1,2,郑成龙1,2   

  1. 1.山东省第八地质矿产勘查院，山东 日照 276826 

    2.山东省地矿局有色金属矿找矿与资源评价重点实验室，山东 日照 276826 

    3.山东省深部金矿探测大数据应用开发工程实验室，山东 威海 264209 

    4.山东省第六地质矿产勘查院，山东 威海 64209  5.山东理工大学资源与环境工程学院，山东 淄博 255000

  • 收稿日期:2021-12-09 出版日期:2022-09-15 发布日期:2022-10-07

Fluid Inclusions, Stable Isotope Characteristics and Geological Significance of  Aritekeshan Porphyry Cu-Mo Deposit in  Northern Qaidam Basin

Tang Mingying1,2,3,Zhu Dequan1,2,Ding Zhengjiang3,4,5,Chen Jian1,2,Wang Weixiao1,2,Dong Zhenkun1,2,Gao Zhenhua1,2,Miao Xiaojun1,2,Zheng Chenglong1,2   

  1. 1. No.8 Institute of Geology and Mineral Resources Exploration of Shandong Province, Rizhao 276826,Shandong, China  

    2. Key Laboratory of Nonferrous Metal Ore Exploration and Resource Evaluation of Shandong Provincial Bureau of Geology and Mineral Resources, Rizhao 276826, Shandong, China 

    3. Shandong Provincial Engineering Laboratory of Application and Development of Big Data for Deep Gold Exploration, Weihai 264209, Shandong, China 

    4. No.6 Institute of Geology and Mineral Resources Exploration of Shandong Province, Weihai 264209, Shandong, China 

    5. School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255000, Shandong, China

  • Received:2021-12-09 Online:2022-09-15 Published:2022-10-07

PDF (PC)

149

摘要：

阿日特克山铜钼矿床位于柴北缘中北段，为近年来新发现的隐伏斑岩型矿床，矿体产出于海西晚期—印支期花岗闪长（斑）岩和古元古代达肯大坂岩群接触部位。为探讨该矿床成矿流体特征和成矿机制，本文对矿床野外地质特征、流体包裹体及稳定同位素组成进行了系统的研究。根据不同类型矿脉之间的相互关系，可将热液成矿期次划分为成矿早期石英阶段、成矿期辉钼矿-多金属硫化物-石英阶段和成矿晚期石英-方解石阶段。流体包裹体岩相学研究表明，阿日特克山铜钼矿床流体包裹体以Ⅰ型（富液相L+V两相水溶液包裹体）、Ⅱ型（富气相L+V两相水溶液包裹体）和Ⅲ型（含子矿物三相水溶液包裹体）为主。显微测温及包裹体拉曼光谱分析结果显示，成矿流体体系为中高温、中低盐度、中高密度的NaCl-H2O体系，至成矿晚期，流体性质变化为低温、低盐度、高密度流体，矿床形成深度为0.40~4.00 km。氢氧同位素分析测试结果显示，δDV-SMOW值为-92.9‰~-78.4‰，δ18OH2O值为-7.4‰~2.0‰，表明成矿流体以混合流体为主，随着成矿流体的演化，有更多的大气降水不断混入。矿石中金属硫化物δ34S值处于9.4‰~11.7‰之间，平均值为10.2‰，表现出明显的地层硫特征，为岩浆热液与围岩地层相互作用所致。综上认为，阿日特克山铜钼矿床为矽卡岩型-斑岩型矿床，形成于海西晚期—印支期俯冲碰撞构造环境，混合成矿流体强烈的不混溶作用为斑岩型铜钼矿床形成的主要机制。

关键词: 流体包裹体, 稳定同位素, 斑岩型铜钼矿床, 阿日特克山, 柴北缘

Abstract:

  Aritekshan Cu-Mo deposit is a newly discovered concealed porphyry deposit, located in the central-north part of the northern Qaidam basin. The orebodies occurred in the contact area between the Late Hercynian-Indosinian granodiorite (porphyry) and Paleoproterozoic Dakendaban Group. In order to explore the characteristics of ore-forming fluids, the ore-forming mechanism and genesis of the deposit, this paper systematically studied the field geological characteristics, fluid inclusions and stable isotope composition of the deposit. According to the relationship between different types of ore veins, the hydrothermal metallogenic stages can be divided into the early mineralization quartz stage, molybdenum-polymetallic sulfide-quartz stage and late mineralization quartz-calcite stage. The fluid inclusions are mainly Type Ⅰ (liquid-rich L+V two-phase aqueous inclusions), Type Ⅱ (gas-rich L+V two-phase aqueous inclusions) and Type Ⅲ (three-phase aqueous solution inclusions containing daughter minerals). The results of microthermometry and inclusion Raman spectrum analysis show that the ore-forming fluid system is NaCl-H2O system with medium-high temperature, medium-low salinity, and medium-high density. In the late stage of mineralization, the properties of the fluids changed to low temperature, low salinity and high density fluid, with the deposit formation depth of 0.40-4.00 km. The values of DV-SMOW and δ18 OH2O range from -92.9‰ to -78.4‰ and -7.4‰ to 2.0‰ respectively, indicating that the ore-forming fluids are mainly mixed fluids. With the evolution of ore-forming fluids, the continuous mixing of meteoric water affects mineralization. Theδ34S of metal sulfide in the ore ranges from 9.4‰ to 11.7‰, with an average value of 10.2‰, showing obvious characteristics of strata sulfur, which is caused by the interaction between magmatic hydrothermal fluid and surrounding rock strata. It is believed that  Aritekshan Cu-Mo deposit is a skarn-porphyry type deposit, which was formed in the subduction and collision during Late Hercynian-Indosinian, which is consistent with the diagenetic age of granodiorite. The strong immiscibility of mixed ore-forming fluids is the main mechanism of the formation of porphyry Cu-Mo deposit.

Key words: fluid inclusion, stable isotope, porphyry Cu-Mo deposit, Aritekeshan, northern Qaidam basin

中图分类号: 

  • P618.56
[1] 辛 未, 孟元库, 许志河, 孙丰月, 钱 烨. 哀牢山成矿带长安金矿床成因：地质特征、流体包裹体测温和H-O-S-Pb同位素制约[J]. 吉林大学学报(地球科学版), 2022, 52(5): 1610-1625.
[2] 王 硕, 孙丰月, 王 冠, 刘 凯, 刘云华. 黑龙江省四平山金矿床成矿作用及矿床成因：来自矿床地质、地球化学、锆石U-Pb年代学及H-O-S同位素的制约[J]. 吉林大学学报(地球科学版), 2022, 52(5): 1626-1648.
[3] 何锦, 郑一迪, 邓启军 , 何雪琴. 我国北方新生代玄武岩地下水化学特征及其成因：以河北省张北县为例[J]. 吉林大学学报(地球科学版), 2022, 52(1): 171-.
[4] 韩强, 云露, 蒋华山, 邵小明, 金仙梅. 塔里木盆地顺北地区奥陶系油气充注过程分析[J]. 吉林大学学报(地球科学版), 2021, 51(3): 645-658.
[5] 岳悦, 孙德有, 侯可军, 彭银彪. 柴北缘乌兰北部三叠纪辉长岩的年代学和地球化学特征[J]. 吉林大学学报(地球科学版), 2021, 51(1): 154-168.
[6] 孙永刚, 李碧乐, 孙丰月, 董峻麟, 钱烨, 姚振. 青海省巴斯湖铅锌矿床M9矿体成因探讨——流体包裹体和H-O-S同位素约束[J]. 吉林大学学报(地球科学版), 2020, 50(5): 1373-1386.
[7] 范媛媛, 刘云华, 于晓飞, 赵强, 李小严, 邓楠, 马塬皓. 甘肃武都金坑子金矿床地球化学特征及成因探讨[J]. 吉林大学学报(地球科学版), 2020, 50(5): 1404-1417.
[8] 王勇军, 刘颜, 黄鑫, 徐昌, 沈立军, 张业智, 张兆民. 胶东牟乳成矿带范家庄金矿床成矿流体特征及其地质意义[J]. 吉林大学学报(地球科学版), 2020, 50(4): 1012-1028.
[9] 梁小龙, 孙景贵, 邱殿明, 徐智涛, 谷小丽, 任泽宁. 大兴安岭西坡比利亚谷银铅锌多金属矿床成因[J]. 吉林大学学报(地球科学版), 2020, 50(3): 781-799.
[10] 孙丰月, 王睿, 王一存, 李顺达, 王可勇, 石开拓, 孙清飞, 王文元. 内蒙古碾子沟钼矿床成矿流体来源、演化及成矿机理[J]. 吉林大学学报(地球科学版), 2020, 50(3): 768-780.
[11] 赵迎冬. 流体包裹体中盐度分析与应用——以福山凹陷为例[J]. 吉林大学学报(地球科学版), 2019, 49(5): 1261-1269.
[12] 苏小四, 高睿敏, 袁文真, 鹿帅, 苏东, 张丽华, 孟祥菲, 左恩德. 基于环境同位素技术的河水补给研究——以沈阳黄家傍河水源地为例[J]. 吉林大学学报(地球科学版), 2019, 49(3): 762-772.
[13] 吴猛, 李怡欣, 刘桂香. 黑龙江省老柞山金矿床成矿流体特征及矿床成因[J]. 吉林大学学报(地球科学版), 2018, 48(5): 1353-1364.
[14] 李向文, 张志国, 王可勇, 孙加鹏, 杨吉波, 杨贺. 大兴安岭北段宝兴沟金矿床成矿流体特征及矿床成因[J]. 吉林大学学报(地球科学版), 2018, 48(4): 1071-1084.
[15] 李文强, 郭巍, 孙守亮, 杨绪海, 刘帅, 侯筱煜. 塔里木盆地巴楚—麦盖提地区古生界油气藏成藏期次[J]. 吉林大学学报(地球科学版), 2018, 48(3): 640-651.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 《吉林大学学报(地球科学版)》编辑部
地址：长春市西民主大街938号(130026)　电话：+86-431-88502374；13756165364　E-mail: xuebao1956@jlu.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发