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1958年9月为了在云南元江外圍寻找銅鉛矿床的勘探基地,故用金屬量测量进行1/5万普查389Km~2,在这一面积内发現了两个新矿点。經轻型山地工程揭露証实有矿体存在,茲将工作方法和初步經驗介紹如下。一、地質情況和地球化学特点 1.地質情况本区位于康滇古地軸之南端,以元古代昆阳系地层为主,其外围有中生代三迭紀和太古代哀牢山变質岩系等。沿昆阳系底部有大小不等的长英岩和基性岩脈呈岩瘤、岩牆出露,並受强烈变質作用。长英岩偶見有云母,而云母較多者多变質为云母片岩或片麻状长英
September 1958 In order to search for the exploration base of the copper-lead deposit in the periphery of the Yuanjiang River in Yunnan Province, 1,500,000 censuses of 389Km ~ 2 were measured by metal amount, and two new ore points were found in this area. After the light mountain project has confirmed the existence of ore bodies, the working methods and preliminary experience are as follows. I. Geological Conditions and Geochemical Characteristics 1. Geological Conditions The area is located at the southern end of the Kangmian ancient axis and is dominated by the Proterozoic Kunyang Formation. Its periphery includes the Mesozoic Triassic and the Archaelian Ailao Mountain metamorphic rocks. Along the bottom of the Kunyang Department, there are lithic rocks and basaltic veins of varying sizes ranging from lithofacies to petrified rocks exposed by strong metamorphism. Changying rocks occasionally have mica, while those with more micas are more metamorphosed as mica schist or gneissic Chang Ying