湘东北黄金洞地区黄土嘴金矿床地质特征及成矿规律

黄土嘴金矿床位于扬子陆块东南缘江南新元古代造山带之湘东北断隆带，湖南重要金矿产地黄金洞金矿田的北东部。本文旨在研究矿床地质与地球化学特征，总结成矿规律，丰富区域金成矿规律认识。研究表明：矿床成矿物质主要来源于冷家溪群地层，成矿流体为中温、中低盐度还原性变质流体，矿床成因类型归为中低温变质热液型金矿床；区内金成矿经历了2期成矿作用，始于加里东期，燕山期存在与区域成矿作用高峰相响应的成矿叠加作用；区内金矿床形成的主要控矿因素为地层和构造，金矿体对地层具有明显的选择性，次一级的近东西向、北西向的断裂则为含矿构造。研究成果可为该区金矿床找矿勘查提供借鉴。

Geological characteristics and metallogenic regularity of Huangtuzui gold deposit in Huangjindong area northeastern Hunan

Huangtuzui gold deposit is located in the Northeast Hunan fault uplift belt of Jiangnan Neoproterozoic oroge in the southeast margin of the Yangtze Landmass, located in the northeast of Huangjindong gold field, which is an important gold deposit in Hunan.The purpose of this paper is to analyze and study the geological and geochemical characteristics of the deposit, summarize the metallogenic regularities, and enrich the understanding of regional gold metallogenic regularities.The study shows that the ore-forming materials mainly come from the Lengjiaxi Group, The ore-forming fluid is metamorphic fluid from Lengjiaxi Group and reducing fluid of medium temperature and medium-low salinity. The genetic type is medium-low temperature metamorphic hydrothermal gold deposit.Gold mineralization experienced multi-stage mineralization, began in Caledonian period, and there was metallogenic superposition corresponding to the peak of regional mineralization in Yanshanian period.The gold deposits main ore controlling factors are stratum and structure,the gold ore body has obvious selectivity to stratum, and the secondary near EW and NE faults are ore bearing structures.The research results can provide reference for ore prospecting and exploration in this area.