摘要
衡阳盆地大地构造处于华南板块与扬子板块相结合的钦-杭成矿带西段,属钦杭成矿带中部与南岭东西向构造-岩浆-成矿带中段北缘交汇区。铜多金属矿床均分布在中新生代断陷盆地中及周边,其受区域上构造演化特定时期断陷盆地控制下的统一构造岩浆(火山)热液活动的制约,与深大断裂及其交会区强烈的构造-岩浆(火山)热液活动密切相关,主成矿时代为中-新生代。厘定了衡阳盆地内以铜为主的矿床成矿系列,共划分2个成矿系列组合,6个成矿系列,13个成矿亚系列。成矿规律和找矿新突破表明:区内铜多金属矿找矿方向应集中于岩体外接触带、深大断裂交汇部位、斑岩体顶部、不整合面和岩性转换部位。
The geotectonics of the Hengyang Basin is located in the west segment of the Qinzhou-Hangzhou metallogenic belt where between the south China Plate and the Yangtze Plate,it belongs to the intersection area between the middle part of the Qinzhou-Hangzhou metallogenic belt and the north edge of the east-west tectonic-magmatic-metallogenic belt in middle Nanling Mountains.The copper polymetallic deposits are distributed in and around Mesozoic Cenozoic faulted basins.They are restricted by the unified tectonomagmatic(volcanic)hydrothermal activity under the control of faulted basins in a specific period of regional tectonic evolution,and are closely related to the strong tectonomagmatic(volcanic)hydrothermal activity in deep faults and their intersection areas.The main metallogenic epoch is meso-cenozoic.The metallogenic series of copper-dominated deposits in Hengyang Basin has been determined,which is divided into two metallogenic series assemblages,six metallogenic series and thirteen metallogenic sub-series.The metallogenic regularity and new prospecting breakthrough show that the prospecting direction of copper-polymetallic deposits in this area should be concentrated in the outer contact zone of rock mass,the intersection of deep and large faults,the top of porphyry bodies,the unconformity interface and lithologic conversion position.
作者
何友宇
南小龙
覃金宁
朱成生
姜必广
李光耀
HE You-yu;NAN Xiao-long;QIN Jin-ning;ZHU Cheng-sheng;JIANG Bi-guang;LI Guang-yao(Brigade 306 of Hunan Nuclear Industry Geological Bureau, Hengyang 421008, China;Tianjin Center, China Geological Survey, Tianjin 300170, China)
出处
《科学技术与工程》
北大核心
2022年第5期1775-1785,共11页
Science Technology and Engineering
基金
湖南省核工业地质局科研项目(KY2015.306-1)。
关键词
铜多金属矿
成矿系列
构造格局
找矿突破
衡阳盆地
copper polymetallic deposits
metallogenic series
tectonic framework
breakthrough in mineral exploration
Hengyang Basin
