阿尔金北缘红柳沟-拉配泉一带铜金矿床硫同位素特征及其意义

李月臣; 陈柏林; 陈正乐; 夏斌

阿尔金北缘红柳沟-拉配泉一带铜金矿床硫同位素特征及其意义

李月臣^{1, 2},
陈柏林³,
陈正乐³,
夏斌¹

1.
中国科学院广州地球化学研究所, 广东广州 510640
2.
新疆资源环境中心, 新疆乌鲁木齐 830000
3.
中国地质科学院地质力学研究所, 北京 100081

基金项目:

国家技术支撑计划项目 2006BAB07B02-04

中国科学院创新工程项目 kzcx2-yw-107-03

详细信息

作者简介:
李月臣(1966-), 男, 高级工程师, 主要从事矿床地球物理、地球化学和矿产勘查的管理与研究

中图分类号: P618.41,P613
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- 被引次数: 0
出版历程
- 收稿日期: 2007-02-16
- 刊出日期: 2007-06-01

SULFUR ISOTOPE FEATURES OF CU-AU POLYMETALLIC DEPOSITS IN THE HONGLIUGOU-LAPEIQUAN AREA ON THE NORTHERN MARGIN OF THE ALTYN TAGH MOUNTAINS AND THEIR RELATION TO THE TECTONIC EVOLUTION

1.
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong
2.
Xinjiang Resource and Environment Center, ǜrǜmqi 830000, Xinjiang, China
3.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081

摘要

摘要: 通过对阿尔金北缘地区铜金矿床的硫同位素研究, 结合矿床地质特征, 划分了区内矿床的成因类型, 认为主要有3类:似层状海相火山沉积型铜多金属矿床、韧性剪切带型(铜)金矿床、受裂隙控制的脉状岩浆热液型铜多金属矿床。结合区域构造演化特点, 探讨了矿床成因类型与区域构造演化阶段的关系, 认为区域成矿作用可分为3个阶段:第一阶段为早古生代早中期板块构造海底扩张作用时期, 形成以喀腊大湾为代表的海相火山沉积型铜多金属矿床; 第二阶段是早古生代晚期板块构造聚合碰撞作用时期, 形成以大平沟和红柳沟为代表的韧性剪切带型(动力变质热液型)(铜)金矿床; 第三阶段是早古生代末板块构造碰撞后的岩浆活动和偏脆性断裂构造活动时期, 形成以索尔库里北山和拉配泉为代表的受裂隙控制的岩浆热液型铜多金属矿床。从硫同位素特征、矿床成因类型及其与区域构造演化的关系上分析, 该区具有较好的铜金多金属矿床找矿远景。
- 铜多金属矿床 /
- 硫同位素 /
- 成因类型 /
- 区域构造演化 /
- 阿尔金北缘
Abstract: The northern margin of the Altyn Tagh Mountains is one of the important metallogenic provinces recently found in northwestern China.Based on the sulfur isotope study of Cu-Au polymetallic deposits in the area, combined with the geological characteristics of the mineral deposits, the authors consider that there are mainly three genetic types of Cu-Au polymetallic deposit in the area:stratified submarine volcanic-sedimentary type Cu-polymetallic deposits, ductile shear zone type gold (Cu) deposits and lode magmatic hydrothermal type Cu-Au polymetallic deposits controlled by structural fractures.According to the characteristics of the tectonic evolution, the authors discuss the relation between the deposit genetic types and stages of tectonic evolution.Three mineralization stages may be distinguished.The first stage was a period of sea-floor spreading in the early-mid Early Paleozoic, forming submarine volcanic-sedimentary type Cu-polymetallic deposits represented by the Kaladawan copper deposit.The second stage was a period of plate convergence and collision in the mid-late Early Paleozoic, forming ductile shear zone type (dynamometamorphic hydrothermal type)(copper-) gold deposits represented by the Dapinggou and Hongliugou gold deposits.The third stage was a period of magmatic activity and brittle faulting after plate collision at the end of the Early Paleozoic, forming lode magmatic hydrothermal type copper-polymetallic deposits controlled by fractures, as exemplified by the Xorkol Beishan and Lapeiquan deposits.Based on an analysis of the sulfur isotope features and the genetic types of the copper-gold deposits and their relation to the tectonic evolution, the authors suggest that this area has favorable prospects for copper-gold polymetallic deposits.
- sulfur isotope /
- Cu-Au polymetallic deposit /
- genetic type /
- tectonic evolution /
- northern margin of the Altyn Tagh Mountains

HTML全文

图 1 阿尔金北缘地区区域构造及铜金多金属矿床(点)分布图

(据1/20万芒崖、巴什考供幅、索尔库里幅地质图和本文资料编制)
Kz-新生界；J_1-2-中下侏罗统；J-侏罗系；P₁-下二叠统；C-石炭系；O-奥陶系；On-青白口系；Jx-蓟县系；Ch-长城系；Pt₁-古元古界；Pt-元古宇；Ar₃-新太古界；ξγ₅¹-印支期钾长花岗岩；γδ₄海西期花岗闪长岩；δ₄-海西期闪长岩；γπ₄-海西期花岗斑宕脉；γ₃-早古生代花岗岩；γδ₃-早古生代花岗闪长岩；δ₃-早古生代闪长岩；υ₂-早古生代辉长岩; αφ₃-早古生代超铁镁质岩；1.地质界线；2.断裂；3.韧性剪切带；4.金矿床；5.金矿点；6.铜锌矿床；8.铁矿床

Figure 1. Tectonic map of the northern Altyn Tagh area, northwestern China, showing the distribution of Cu-Au polymetallic deposits

下载: 全尺寸图片幻灯片

图 2 阿尔金北缘铜金矿及相关矿床、岩石硫同位素投影

Figure 2. Projection of sulfur isotope composition of ores from copper-gold deposits and their related ore deposits and rocks in the northern Altyn Tagh

下载: 全尺寸图片幻灯片

表 1 阿尔金北缘铜矿床硫同位素测试结果

Table 1. Sulfur isotope analysis of copper-gold deposits in the northern Altyn Tagh area

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