东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

胶东金青顶金矿床成矿流体来源的黄铁矿微量元素及He-Ar同位素证据

ISSN号：1000-3657
期刊名称：Geology in China
时间：2012.2.2
页码：195-204
分类：P618.51[天文地球—矿床学;天文地球—地质学]
作者机构：[1]河北省区域地质矿产调查研究所,河北廊坊065000, [2]中国地质大学地质过程与矿产资源国家重点实验室,北京100083, [3]山东金洲矿业集团有限公司,山东乳山264500, [4]中国石油集团工程设计有限公司华北分公司,河北任丘062552
相关基金：国家自然科学基金项目（90914002）; 全国危机矿山接替资源找矿项目（20089937）; 高等学校学科创新引智计划项目（B07011）资助
相关项目：华北克拉通破坏在太行山带的金属成矿效应

作者：张运强| 李胜荣| 陈海燕| 张秀宝| 周起凤| 崔举超| 宋玉波| 郭杰|

关键词：黄铁矿, 微量元素, 氦氩同位素, 成矿流体, 金青顶金矿, 胶东, pyrite, trace elements, He-Ar isotope, ore-forming fluids, Jinqingding gold deposit, Jiaodong

中文摘要：

金青顶金矿床是目前国内最大的石英单脉型金矿,其金储量超过50 t,规模为大型。对该矿床成矿流体性质和来源的研究十分必要。笔者通过Ⅱ号矿体主要载金矿物黄铁矿微量元素的研究发现,其Co/Ni为2.317～11.734（平均7.17）,显示主要为热液成因;高场强元素（HFSE）特征显示,成矿早期以富F流体为主,主成矿期以富Cl流体为主;稀土配分模式显示成矿物质并不是直接来源于围岩昆嵛山二长花岗岩。对黄铁矿流体包裹体He、Ar同位素特征的研究表明,3He/4He、40Ar/36Ar分别为0.1～2.2 Ra（平均值0.60 Ra）,462.7～1 507.5（平均值831）,显示成矿流体主要源自地壳,并与深部幔源流体发生了不同程度的混合,且上升过程中有少量大气降水加入。

英文摘要：

The Jinqingding gold deposit with identified reserves of more than 50t is currently the largest lode gold deposit in terms of single vein gold resources and is also a superlarge gold deposit located in the middle part of the Muping-Rushan gold belt in Jiaodong;nevertheless,the genetic type and source of ore-forming fluids in the gold deposit constitute a problem that needs urgent solution.A study of trace elements and REE compositions and features of gold-bearing pyrite from No.Ⅱ ore body of the Jinqingding gold deposit reveals that the pyrite displays hydrothermal characteristics with Co/Ni ratios from 2.317 to 11.734（7.17 on average）.The HFSE indicates that the ore-forming fluid originally belonged to the F-rich system and generally evolved into the Cl-rich system at the chief metallogenic stage,and the distribution patterns of REE shows that the source of matallogenic materials was not mainly from Mesozoic Kunyunshan monzonitic granite.According to an analysis of the characteristic parameters（3He/4He=0.1～2.2 Ra（0.60 Ra on average））,40Ar/36Ar =462.7～1507.5（831 on average）,it is considered that the source of matallogenic materials was mainly derived from the lower crust and was contaminated by meteoric water during the intrusion,and the mantle fluids were involved in the metallogenic process.

同期刊论文项目