遵义南部地区铝土矿矿床地质特征及找矿方法

Geological Characteristics and Prospecting Methods of Bauxite Deposit in South Zunyi

遵义南部地区由于受传统地质工作方法限制,仅局限于以"露头"找矿模式。论述了遵义南部地区铝土矿矿床地质特征,通过对区域成矿地质背景,铝土矿富集与古岩溶地貌的关系,地球物理异常特征,分析认为该区铝土矿主要产出于泻湖相。在该相区采用音频大地电磁测深(AMT)方法圈出与铝土矿赋存富集相关的古岩溶基底坑洼,在古岩溶漏斗或低洼处布设钻孔进行"攻深找盲"寻找铝土矿盲矿体(床),以实现遵义南部地区铝土矿找矿方法的新突破。

As restricted by traditional geological working methods, the prospecting model in South Zunyi is limited to ＂outcrop＂.The authors have discussed the geological characteristics of bauxite depositin South Zunyi, analyzed the regional mineralization geological background, relationship between bauxite enrichment and ancient karst landform, and abnormal geophysical characteristics,and concluded that the bauxite mainly comes from lagoonal facies. Therefore, the authors have adopted the audio-frequency magnetotelluric sounding（AMT） in the lagoonal facies to outline the ancient karst base cavities relevant with bauxite occurrence enrichment and then laid drill holes at ancient karst funnels or low areas to find bind bauxite ore bodies（deposits） by ＂going deep and finding blind ore bodies＂, in order to have new breakthrough in bauxite prospecting methods in South Zunyi.