辽东连山关(3075)铀矿床氢氧同位素特征及矿床成因探讨  

Hydrogen and Oxygen Isotope Characteristics and Genesis of the Uranium Deposit in Lianshanguan(3075),Eastern Liaoning Province

作　　者：汤志帅 何德亮 陈琳 梁西伟 姜晶晶 高存山 TANG Zhishuai;HE Deliang;CHEN Lin;LIANG Xiwei;JIANG Jingjing;GAO Cunshan(Real Estate Trading and Register Center of Wulian County;Land Reserve Center of Wulian County;Rizhao Government Services Center;Natural Resources Law Enforcement and Inspection Corps of Wulian County;The 7th Institute of Geology&Mineral Exploration of Shandong Province)

机构地区：[1]五莲县不动产交易登记中心 [2]五莲县土地储备中心 [3]日照市政务服务中心 [4]五莲县自然资源执法监察大队 [5]山东省第七地质矿产勘查院

出　　处：《现代矿业》2024年第9期64-68,共5页Modern Mining

基　　金：国家自然科学基金青年科学基金项目(编号:41502097)。

摘　　要：连山关地区位于华北克拉通北缘铀成矿带,是辽东地区主要铀矿远景区之一,连山关(3075)铀矿床是品位最富的热液型铀矿床之一。为了探讨该矿床成矿流体的来源,分析成矿模式,为矿区外围找矿提供依据,对比研究了不同成矿阶段的绢云母中氢氧同位素特征。结果表明,成矿早阶段绢云母中的δ^(18)O_(H_(2)O)值为7.04‰~7.24‰,平均值为7.14‰,δD_(H_(2)O)值为-45.42‰~-40.62‰,平均值为-43.02‰;主成矿阶段绢云母中的δD_(H_(2)O)值为4.52‰~6.42‰,平均值为5.47‰,δD_(H_(2)O)值为-16.15‰~-15.85‰,平均值为-16.00‰;成矿晚阶段绢云母中的δ^(18)O_(H_(2)O)值为1.46‰,δD_(H_(2)O)值为4.21‰。区域变质变形作用促使辽河群矿物脱水形成变质流体,变质流体沿着断裂带从辽河群经接触带流向连山关岩体内部。Lianshanguan area is located in uranium metallogenic province in the northern margin of North China Craton.It is one of the main uranium deposit prospect areas in eastern Liaoning Province,and the Lianshanguan(3075)uranium deposit is one of the most rich grade hydrothermal uranium deposits.In order to explore the source of ore-forming fluid,analyze the ore-forming model and provide the basis for pros-pecting outside the mine area,the hydrogen and oxygen isotope characteristics of sericite in different ore-forming stages were compared.The results show that the δ^(18)OH_(2)O values of sericite in the early stage of mineral-ization are 7.04‰to 7.24‰with an average value of 7.14‰,and the δDH_(2)O values are-45.42‰to-40.62‰with an average value of-43.02‰.The δ^(18)OH_(2)O values of sericite in the main ore-forming stage range from 4.52‰to 6.42‰with an average value of 5.47‰,and the δDH_(2)O values range from-16.15‰to-15.85‰with an average value of-16.00‰.The δ18OH_(2)O and δDH_(2)O values are 1.46‰and 4.21‰respectively.The re-gional metamorphic deformation causes the minerals in Liaohe Group to dehydrate and form metamorphic flu-id,which flows from Liaohe Group to Lianshanguan rock mass through the contact zone along the fault zone.

关 键 词：连山关(3075)铀矿床 变质流体 氢氧同位素 

分 类 号：P619.14[天文地球—矿床学]