贵州赫章菜园子铁矿床成矿构造分析和控矿规律研究  

Metallogenic Structure Analysis and Ore-controlling Regularity Study on Caiyuanzi Iron Deposit in Hezhang,Guizhou

作　　者：苏特 刘健[1,3] 汪洋 王军[2] 刘明民[1,3] SU Te;LIU Jian;WANG Yang;WANG Jun;LIU Ming-min(No.103 Geological Party,Guizhou Bureau of Geology and Mineral Resources Development,Tongren 554300,Guizhou,China;No.113 Geological Party,Guizhou Bureau of Geology and Mineral Resources Development,Liupanshui 553000,Guizhou,China;Engineering Technology Innovation Center of Mineral Resources Explorations in Bedrock Zones,Ministry of Natural Resources,Tongren 554300,Guizhou,China)

机构地区：[1]贵州省地质矿产勘查开发局103地质大队,贵州铜仁554300 [2]贵州省地质矿产勘查开发局113地质大队,贵州六盘水553000 [3]自然资源部基岩区矿产资源勘查工程技术创新中心,贵州铜仁554300

出　　处：《贵州地质》2023年第3期207-215,共9页Guizhou Geology

基　　金：贵州省锰矿资源预测评价科技创新人才团队(黔科合平台人才[2018]5618)资助。

摘　　要：贵州赫章菜园子铁矿是产于泥盆系碳酸盐岩中的全隐伏矿床,为揭示该矿床的成矿地质背景和控矿规律,本文通过区域成矿地质背景分析、矿区地质调查、历年生产勘探资料系统整理编图,系统地总结了矿区构造控矿规律与构造演化序列。研究表明:泥盆纪强烈伸展、断陷作用形成的垭都—蟒硐断裂次级北西向同沉积断层为导矿构造,北西向次级地堑为容矿构造,含铁流体沿同沉积断层通道喷溢,并在次级地堑盆地中心沉积成矿,形成层状、似层状菱铁矿体;燕山期垭都—蟒硐断裂派生的一系列北西西向张扭性断裂带为脉状、网脉状菱铁矿有利容矿空间,脉状菱铁矿体具有向南东侧伏趋势;北西西向羽状张扭性断裂倾角由陡变缓地段为脉状矿体矿化强度最大区域。根据这些控矿规律可以有效地在矿区及其周边进行找矿预测。The Caiyuanzi iron deposit in Hezhang,Guizhou is a fully concealed deposit occurring in Devonian carbonate rocks.In order to reveal the ore-forming geological background and ore-controlling factors of the deposit,based on the analysis of regional ore-forming geological background,geological survey of mining area and systematic compilation of production and exploration data over the years,this paper systematically summarizes the structural ore-controlling law and tectonic evolution sequence of the mining area.The study shows that the secondary synsedimentary fault of the NW Yadu-Pangdong fault formed by strong extension and fault depression in the Devonian is the ore-conducting structure,the NW-trending secondary graben is the ore-bearing structure,and the iron-bearing fluid gushes along the channel of the synsedimentary fault.it is deposited and mineralized in the center of the secondary graben basin to form a layered and layer-like siderite orebody.A series of NWW-trending tensional and torsional fault zones derived from Yadu-Pangdong fault in Yanshan period are vein-like and reticulate siderite favorable ore-bearing space,and veined siderite orebodies generally pour to the south-east;the maximum mineralization intensity of vein orebodies is where the dip angle of NWW-trending feather tensional faults changes from steep to slow.According to these ore-controlling laws,ore prospecting and prediction can be carried out effectively in the mining area and its surrounding areas.

关 键 词：菱铁矿 构造演化 构造控矿规律 菜园子 贵州 

分 类 号：P618.31[天文地球—矿床学] P542.3[天文地球—地质学]