地质科技通报2025，Vol.44Issue(2)：257-269,13.DOI:10.19509/j.cnki.dzkq.tb20230525
幕阜山岩体北缘鄂南地区构造特征与构造控矿作用
Structural characteristics and tectonic controls on mineralization in the northern margin of the Mufushan pluton,southern Hubei region
摘要
Abstract
[Objective]An intensive Early Cretaceous magmatic-hydrothermal metallogenic system developed in the Mufushan area of the central Jingnan Orogen.This orogenic belt in the South China Block formed through the accretion and subsequent collision of the Yangtze and Cathaysia blocks during the early Neoproterozoic,resulting in the formation of rare metal deposits(Li-Be-Cs-Nb-Ta)and nonferrous metal deposits(Pb-Zn-Cu-Au-Sb).[Methods]This study investigates the structural control of polymetallic deposits in southern Hubei Province utilizing structural analysis,paleostress inversions of fault-slip data,and the spatial distribution of polymetallic ore deposits.[Results]Structural analysis revealed that the Jiangnan fault,striking E-W and originating in the Neoproterozoic,exhibits Triassic top-to-the-north thrusting,Late Cretaceous oblique normal faulting,and Paleogene left-lateral strike-slip motion.The NE-striking Changping fault,formed during the Middle Jurassic Yanshanian orogeny,shows evidence of late Early Cretaceous left-lateral strike-slip motion,late Cretaceous normal faulting,and late Paleogene right-lateral strike-slip motion.Paleostress inversions indicate that southern Hubei Province experienced a series of paleostress fields,including a strike-slip stress field(with maximum principal stress oriented N-S and minimum principal stress oriented N-S)during the late Early Cretaceous,an NW-SE extensional stress field during the late Cretaceous,another strike-slip stress field(with maximum principal stress oriented NE-SW and minimum principal stress oriented N-S)during the early Paleogene,and a NE-SW extensional stress field during the late Paleogene.[Conclusion]Based on the polymetallic deposits in the study area,we conclude that secondary faults subparallel to the primary NE-SW trending fault,along with NW-SE and E-W trending faults intersecting with the primary NE-SW fault,present substantial potential for polymetallic mineral exploration.关键词
幕阜山岩体/构造变形/古应力场/构造控矿作用/江南造山带/鄂南地区Key words
Mufushan pluton/structural deformation/paleostress field/structural ore-controlling of polymetallic deposit/Jiangnan Orogen/southernHubei Province分类
天文与地球科学引用本文复制引用
林子晗,夏元,张航川,徐先兵..幕阜山岩体北缘鄂南地区构造特征与构造控矿作用[J].地质科技通报,2025,44(2):257-269,13.基金项目
湖北省自然科学基金联合基金项目(2023AFD229) （2023AFD229）
