浅析沽源—红山子铀成矿带潜火山岩与铀成矿的关系——以流纹斑岩为例
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- 英文论文题名：Analysis on the relationship between sub-volcanics and uranium mineralization of Guyuan-Hong Shanzi uranium metallogenic belt-In case of rhyolite porphyry
- 论文作者：李继木 ; 刘阳 ; 牛子良 ; 张韶华
- 英文论文作者：LI Ji-mu ; LIU Yang ; NIU Zi-liang ; ZHANG Shao-hua ; NO.243 Geological Party ; CNNC ; Chengde Mineral resources evaluation center
- 年：2015
- 作者机构：核工业二四三大队;承德市矿产资源评审中心;
- 论文关键词：沽源—红山子铀成矿带 ; 潜火山岩 ; 火山岩型铀矿 ; 流纹斑岩 ; 成矿模式
- 英文论文关键词：Guyuan—Hong Shanzi uranium metallogenicbelt ; sub-volcanic ; volcanic type uranium deposit ; rhyolite porphyry ; metallogenic model
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第1册（铀矿地质分卷、铀矿冶分卷）
- 语种：中文
- 分类号：P619.14
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：7
- 文件大小：454k
- 原文格式：O
- 会议级别：全国
摘要
沽源—红山子铀成矿带位于华北陆块北缘铀成矿省,区内具工业价值的铀矿床以火山岩型为主。已发现的火山岩型铀矿床,在时间和空间上都与潜火山岩有密切的关系,尤以与流纹斑岩关系最为密切:铀成矿时代一般晚于潜火山岩成岩时代,矿体一般产于潜火山岩内外接触带,呈浸染状、群脉状或似层状。笔者近年来一直在沽源—红山子铀成矿带从事铀矿找矿工作,本文以张麻井和红山子铀矿床为例,初步总结潜火山岩与铀成矿的关系:以过渡岩浆室为矿源和热源,以岩浆通道(潜火山岩、火山颈)为热柱,冷水和热液沿附近的构造裂隙循环,在火山机构附近成矿,后期改造叠加再次富集。潜火山岩在这一过程中起到导矿和储矿的双重作用,由此建立潜火山岩成矿模式。依据此成矿模式,对比毕家沟破火山内流纹斑岩特征,总结成矿有利条件,指出找矿方向,圈定找矿靶区。
Guyuan—Hong Shanzi uranium metallogenic belt is located in the northen North China block Metallogenic Province,the uranium deposits with industrial value in this area are mainly of volcanic type.Thevolcanic type uranium deposits which having been discovered have close relation to sub-volcanics in time and space,especially in the most closely related to rhyolite porphyry:uranium metallogenetic ages are later than petrogenic agesof sub-volcanics,mostorebodys are occurred in internal or external contact zone of sub-volcanics and showed as disseminated,vein-group-type and stratiform-like.The author was engaged in uuranium deposit prospecting work in Guyuan—Hong Shanzi uranium metallogenic belt for recent years,this article takes Zhang Majinguraniumdepositand Hong Shanzi uranium depositas examples,preliminary summarized the relationship bet-ween volcanic rocks and uranium mineralization:take transition magma chamber as ore source and heat source,magma channelsC sub-volcanic and volcanic neck) as plume,the cold water and hydrothermal cycled along the nearby structural fissures,metallogenic progress happened nearthe volcanic apparatus,thetransformation and superposition in later stage make it enrichtagain.Sub-volcanic played ore conducting and ore-containing dual roles in the process.Founding an metallogenic model of subvolcanic,then based on this metallogenic model to contrast the characteristics of rhyolite porphyry in Bijiagouvolcanicapparatus,summarized the conditions favourable to metaliogenesis,points out the prospecting direction,delineate the prospecting target.
Guyuan—Hong Shanzi uranium metallogenic belt is located in the northen North China block Metallogenic Province,the uranium deposits with industrial value in this area are mainly of volcanic type.Thevolcanic type uranium deposits which having been discovered have close relation to sub-volcanics in time and space,especially in the most closely related to rhyolite porphyry:uranium metallogenetic ages are later than petrogenic agesof sub-volcanics,mostorebodys are occurred in internal or external contact zone of sub-volcanics and showed as disseminated,vein-group-type and stratiform-like.The author was engaged in uuranium deposit prospecting work in Guyuan—Hong Shanzi uranium metallogenic belt for recent years,this article takes Zhang Majinguraniumdepositand Hong Shanzi uranium depositas examples,preliminary summarized the relationship bet-ween volcanic rocks and uranium mineralization:take transition magma chamber as ore source and heat source,magma channelsC sub-volcanic and volcanic neck) as plume,the cold water and hydrothermal cycled along the nearby structural fissures,metallogenic progress happened nearthe volcanic apparatus,thetransformation and superposition in later stage make it enrichtagain.Sub-volcanic played ore conducting and ore-containing dual roles in the process.Founding an metallogenic model of subvolcanic,then based on this metallogenic model to contrast the characteristics of rhyolite porphyry in Bijiagouvolcanicapparatus,summarized the conditions favourable to metaliogenesis,points out the prospecting direction,delineate the prospecting target.
引文
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