鄂东北梨木岭钼矿床元素异常分布与矿化富集规律对控矿断裂的指示
|
摘要
鄂东北地区梨木岭矿床为近几年新发现的一脉型钼矿床,矿区内钼矿(化)体受北北东走向的断裂控制,已发现32条赋存其中。通过对矿区内元素异常的分布特征以及矿化富集规律的研究,探讨其对北北东向控矿断裂的指示意义,认为土壤测量元素异常的分布对北北东向控矿断裂的等距性分布以及左行平移性质具有一定的指示意义;岩石测量元素异常分布显示北北东向控矿断裂普遍富集W-Sn-Bi(Ag)等高温元素,中温元素Mo-Cu-Pb-Zn由北西至南东方向则具有富集减弱的水平分带特征;目前工程控制钼矿化垂深600 m,钼矿化富集受断裂性质、岩石破碎变形程度、节理裂隙发育状况及围岩岩性等多种因素影响,主矿体品位厚度显示了明显的水平变化规律,结合矿床地质特征以及成岩成矿的测年数据,认为北北东控矿断裂早白垩世脆性剪切变形作用是钼矿化富集的主导因素。
The Limuling molybdenum-polymetallic deposit as a new pulse deposit had found 32 molybdenum mineralization bodies in the NNE faults in the recent years.This paper researches the distribution of the major ore-forming elements and the mineral enrichment regularities,aiming for discussing its implication to the NNE ore-controlling faults.The elements distribution of soil anomaly can signify the isometric distribution and the left translation of the NNE ore-controlling faults.The elements distribution of rock anomaly shows that the NNE ore-controlling faults whicn are commonly rich in high temperature elements W-Sn-Bi(Ag)have the elements zoning characteristics,however medium temperature elements Mo-Cu-Pb-Zn reduce from NW to SE.The vertical depth of molybdenum mineralization is 600 m,the mineral enrichment is affected by several factors,such as the degree of rock fracture,the development of joints and fissures, the lithology of surrounding rocks and the property of the NNE faults.The apparent horizontal changes of the ore body thickness and grade with the deposit geology and the ore-rock ages imply that the brittle shear deformation of the NNE faults in the early Cretaceous is the dominant factor of the mineral enrichment.
The Limuling molybdenum-polymetallic deposit as a new pulse deposit had found 32 molybdenum mineralization bodies in the NNE faults in the recent years.This paper researches the distribution of the major ore-forming elements and the mineral enrichment regularities,aiming for discussing its implication to the NNE ore-controlling faults.The elements distribution of soil anomaly can signify the isometric distribution and the left translation of the NNE ore-controlling faults.The elements distribution of rock anomaly shows that the NNE ore-controlling faults whicn are commonly rich in high temperature elements W-Sn-Bi(Ag)have the elements zoning characteristics,however medium temperature elements Mo-Cu-Pb-Zn reduce from NW to SE.The vertical depth of molybdenum mineralization is 600 m,the mineral enrichment is affected by several factors,such as the degree of rock fracture,the development of joints and fissures, the lithology of surrounding rocks and the property of the NNE faults.The apparent horizontal changes of the ore body thickness and grade with the deposit geology and the ore-rock ages imply that the brittle shear deformation of the NNE faults in the early Cretaceous is the dominant factor of the mineral enrichment.
引文
[1] 王世称,成秋明,金若时.勘查地球化学工作述评[J].长春地质学院学报,1989(1):63-66.
[2] 陈国达,黄瑞华.关于构造地球化学的几个问题[J].大地构造与成矿学,1984(1):7-18.
[3] 葛良胜,张文钊,袁土松,等.蒙古南戈壁—中国东乌旗跨国境成矿带东段金多金属成矿与找矿[M].北京:地质出版社,2009:114-121.
[4] 贾大成,张潇,卢焱,等.吉林省延吉五凤和五星山浅成低温热液型金矿床[M].北京:地质出版社,2011:101-105.
[5] 汪贻水,彭觥,肖垂斌,等.矿山地质选集:第一卷矿山地质实用手册[M].长沙:中南大学出版社,2015:299-305.
[6] 范川,周晓宁,李正华,等.湖北省蕲春县梨木岭铜钼矿断裂构造控矿规律浅析[J].资源环境与工程,2014,28(6):786-791.
[7] 周晓宁,范川,李正华,等.蕲春县梨木岭—金家沟地区钼多金属矿床矿化类型空间分布规律浅析[J].资源环境与工程,2015,29(6):795-799.
[8] 龚银杰,朱江,陈冬明,等.大别山南麓梨木岭钼矿床辉钼矿Re-Os同位素年龄及地质意义[J].矿床地质,2017,36(4):992-1002.
[9] 龚银杰,彭三国,朱江,等.武当—桐柏—大别成矿带铜矿成矿规律[J].地质与勘探,2014,50(5):902-909.
[10] 汤加富,周存亭,侯明金,等.大别山及邻区地质构造特征与形成演化:地幔差速环流与陆内多期造山[M].北京:地质出版社,2003:17-19.
[11] Zhai M G,Cong B L,Zhao Z Y,et al.Petrologic-tectonic units in the coesite-bearing metamorphic terrains of the Dabie Mountains,Central China and t eir geotectonic implication[J].Journal of Asian Earth Sciences,1995,11(1):1213.
[12] 陈公信,金经炜,熊家技,等.湖北省岩石地层[M].武汉:中国地质大学出版社,1996:5-56.
[13] 徐书桐,刘贻灿,江来利,等.大别造山带的构造几何学和运动学[M].合肥:中国科学技术大学出版社,2002:1-133.
[14] 李石,王彤.桐柏山—大别山花岗岩类地球化学[M].武汉:中国地质大学出版社,1991:149-159.
[15] 张超,马昌前.大别山晚中生代巨量岩浆活动的启动:花岗岩锆石U-Pb年龄和Hf同位素制约[J].矿物岩石,2008,28(4):71-79.
[16] 杨梅珍,付晶晶,王世峰,等.桐柏山老湾金矿带右行走滑断裂控矿体系的构建及其意义[J].大地构造与成矿学,2014,38(1):94-107.
[2] 陈国达,黄瑞华.关于构造地球化学的几个问题[J].大地构造与成矿学,1984(1):7-18.
[3] 葛良胜,张文钊,袁土松,等.蒙古南戈壁—中国东乌旗跨国境成矿带东段金多金属成矿与找矿[M].北京:地质出版社,2009:114-121.
[4] 贾大成,张潇,卢焱,等.吉林省延吉五凤和五星山浅成低温热液型金矿床[M].北京:地质出版社,2011:101-105.
[5] 汪贻水,彭觥,肖垂斌,等.矿山地质选集:第一卷矿山地质实用手册[M].长沙:中南大学出版社,2015:299-305.
[6] 范川,周晓宁,李正华,等.湖北省蕲春县梨木岭铜钼矿断裂构造控矿规律浅析[J].资源环境与工程,2014,28(6):786-791.
[7] 周晓宁,范川,李正华,等.蕲春县梨木岭—金家沟地区钼多金属矿床矿化类型空间分布规律浅析[J].资源环境与工程,2015,29(6):795-799.
[8] 龚银杰,朱江,陈冬明,等.大别山南麓梨木岭钼矿床辉钼矿Re-Os同位素年龄及地质意义[J].矿床地质,2017,36(4):992-1002.
[9] 龚银杰,彭三国,朱江,等.武当—桐柏—大别成矿带铜矿成矿规律[J].地质与勘探,2014,50(5):902-909.
[10] 汤加富,周存亭,侯明金,等.大别山及邻区地质构造特征与形成演化:地幔差速环流与陆内多期造山[M].北京:地质出版社,2003:17-19.
[11] Zhai M G,Cong B L,Zhao Z Y,et al.Petrologic-tectonic units in the coesite-bearing metamorphic terrains of the Dabie Mountains,Central China and t eir geotectonic implication[J].Journal of Asian Earth Sciences,1995,11(1):1213.
[12] 陈公信,金经炜,熊家技,等.湖北省岩石地层[M].武汉:中国地质大学出版社,1996:5-56.
[13] 徐书桐,刘贻灿,江来利,等.大别造山带的构造几何学和运动学[M].合肥:中国科学技术大学出版社,2002:1-133.
[14] 李石,王彤.桐柏山—大别山花岗岩类地球化学[M].武汉:中国地质大学出版社,1991:149-159.
[15] 张超,马昌前.大别山晚中生代巨量岩浆活动的启动:花岗岩锆石U-Pb年龄和Hf同位素制约[J].矿物岩石,2008,28(4):71-79.
[16] 杨梅珍,付晶晶,王世峰,等.桐柏山老湾金矿带右行走滑断裂控矿体系的构建及其意义[J].大地构造与成矿学,2014,38(1):94-107.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |