海南省昌江县土外山金矿床矿体赋存规律及找矿方向  

Ore body hosting laws and prospecting directions in Tuwaishan Gold Deposit in Changjiang County,Hainan Province

作　　者：周文林 胡杨 钟祖勲 Zhou Wenlin;Hu Yang;Zhong Zuxun(Hainan Jinchang Gold Mine Co.,Ltd.)

机构地区：[1]海南金昌金矿有限公司

出　　处：《黄金》2024年第8期94-98,共5页Gold

基　　金：海南省海洋地质资源与环境重点实验室基金项目(22-HNHYD22YHJKF02l)。

摘　　要：土外山金矿床经历了近20年的开采,保有储量显著减少,亟须探矿增储。通过对区域成矿背景、矿区及矿床地质特征的分析,区域上的北东向戈枕断裂对金矿床分布具有控制作用,土外山金矿床由西向东划分了4个矿带。矿体受戈枕断裂上盘次级断裂控制。由西向东矿体间的无矿间距一般10~50 m,单一矿体走向无矿间距40~80 m。矿体被多组北东向断裂联合控制,呈现菱形网格状分布特征,且反映了断裂交会处赋矿的特点。根据已圈定的3处富矿柱特征及其赋存规律,预测第四富矿柱在10勘探线和12勘探线。各富矿柱之间有低品位薄矿体和矿化,以及两侧的小透镜状富矿体产出。依据控矿构造的近似等间距分布、矿体的侧伏及侧伏角、矿体垂深的分段富矿规律,可在不同富集矿段寻找蚀变岩型矿体。After nearly 20 years of exploitation,the reserves of Tuwaishan Gold Deposit have significantly decreased,necessitating exploration to increase reserves.By analyzing the regional metallogenic background and the geological characteristics of the mining area and deposit,it was found that the northeast-trending Gezhen fault controls the distribution of the gold deposit.The Tuwaishan Gold Deposit is divided into 4 ore zones from west to east.The ore bodies are controlled by secondary faults in the hanging wall of Gezhen fault.The barren intervals between ore bodies range from 10 m to 50 m,while the barren intervals along the strike of individual ore bodies range from 40 m to 80 m.The ore bodies are jointly controlled by multiple sets of northeast-trending faults,showing a rhombus grid pattern and reflecting the ore-hosting characteristics at fault intersections.Based on the characteristics and occurrence patterns of 3 delineated ore-hosting columns,the fourth rich ore column is predicted between Exploration Line 10 and 12.Low-grade thin ore bodies and mineralization,as well as small lenticular rich ore bodies,are found between the rich ore columns.According to the approximately equidistant distribution of ore-controlling structures,the lateral extension of ore bodies and the lateral angle,and the segmented enrichment patterns of ore bodies vertically,altered rock type ore bodies can be sought in different enriched ore sections.

关 键 词：土外山金矿床 构造控矿 成矿规律 深部找矿 矿带 海南省 

分 类 号：TD15[矿业工程—矿山地质测量]