中文摘要:井边矿床位于庐枞盆地中部，为中低温热液脉型铜(金)矿床。矿体沿断裂和构造破碎带呈陡倾脉状产出。矿石构造主要为细(网)脉状、晶洞(簇)状，次为角砾状；矿石结构为交代和结晶作用形成的各种结构。黄铁矿成分标型Co/Ni、Fe/（S+As）、S/Se等比值特征显示成矿热液主要为中低温岩浆热液。黄铜矿单矿物、巴家滩岩浆岩的稀土元素特征与盆地砖桥旋回火山-次火山岩的稀土元素特征总体类似，矿石稀土元素继承或保存了含矿岩浆岩的源区信息。结合区域地质年代学资料以及矿体和正长斑岩脉均产于与火山_次火山安山玢岩相同的构造体系中等现象，推测成矿热液可能来源于火山喷发之后的次火山-侵入岩的岩浆期后热液。断裂构造是控制井边矿床的重要因素。本区构造与中国东部中生代新华夏体系一致，在区域南北左行对扭力场中，发生了强烈的断裂构造活动。“应变菱形解析”显示： 第一序次的NE向、NW向与第二序次NW向、EW向、NNW向断裂共同控制矿床的产出。井边矿化区的分布呈现出从虎栈—张榜总体沿NE40°成带、NW310°成行的特点。
Abstract:The Jingbian ore deposit is a medium-low temperature hydrothermal type Cu (Au) deposit lying in central Luzong basin. The ores are mainly in the veinlet, stockwork, crystal aggregate forms with subordinate brecciated structure. The textures of the ore are complex, resulting from metasomatism and crystallization. The ore bodies are commonly steeply-dipping veins, controlled by fault structure and tectonic shatter zone. The typomorphic values of Co/Ni，Fe/（S+As），and S/Se of pyrite show that the hydrothermal ore-forming solution mainly came from medium-low temperature magmatic hydrothermal fluids. The overall REE characteristics are similar to those of chalcopyrite from the Jingbian copper (gold) deposit，Bajiatan intrusive rock and volcanic rock and subvolcanic rocks of Zhuanqiao Formation. The REE characteristics of chalcopyrite inherited or retained source characteristics of ore_bearing magmatic rocks. In addition, regional geochronology and the phenomenon that the same tectonic system controls ore bodies and syenite porphyry veins indicate that the hydrothermal ore-forming solution probably came from magmatic hydrothermal solution of the intrusive rocks subsequent to volcanic rock and subvolcanic rocks. Fracture structure is an important factor controlling the Jingbian ore deposit, and the structure in this area is consistent with the Neo-cathaysian tectonic system of Mesozoic in eastern China. The fault structural activity is strong in Luzong area, controlled by regional NS-trending sinistral shear force field and rotational action. Using the means of “Analysis of Diamond in Stress Action”, the authors reveal that the formation of the Jingbian ore deposit was controlled by the structures which consisted mainly of NE- and NW-striking faults and subordinately of NW-，EW- and NNW-trending faults. It is inferred that the mining areas of Zhangban and Huzhan in the ore deposit constitute a NE-trending metallogenic belt, and that the two ends and two sides of the belt are promising areas for ore exploration.
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基金项目:本文得到中国地质调查局资源评价项目（编号：1212010781014，1212010631701）、中国地质大学地质过程与矿产资源国家重点实验室开放课题（编号：MGMR2001-1）资助
引用文本：
覃永军,曾键年,王思源,陆建培,杨梅珍,陈津华.2010.安徽庐枞盆地井边铜(金)矿床成矿特征及控矿地质因素探讨[J].矿床地质,29(5):915~930覃永军,曾键年,王思源,陆建培,杨梅珍,陈津华.2010.Metallogenic characteristics and ore-control factors of Jingbian copper (gold) deposit in Luzong basin，Anhui Province[J].Mineral Deposits29(5):915~930
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