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1954年冬及1955年夏作者因搜集论文资料,曾先后两次到白银厂矿田及其附近地区工作,为时共约两个月。归校后,写成研究生毕业论文,本文系论文中之部分内容。 一、火山岩特点 自白银厂沿变质岩老山向西北方向之一带断續分布了大量下部古生代的火山岩,根据迄今所得材料,知此种火山岩在白银厂发育最为完善,亦最具代表性。
In the winter of 1954 and the summer of 1955, the author collected data twice and worked twice for the Baiyinchang ore field and its vicinity for about two months. After returning to school, wrote a graduate thesis, this paper is part of the thesis. I. CHARACTERISTICS OF VOLCANIC ROCKS A large number of volcanic rocks in the lower Paleozoic are intermittently distributed along the metamorphic rocks in one of the northwestern directions of the Baiyin Plant. According to the materials obtained so far, it is known that the volcanic rocks are the most developed and most representative in the Baiyin Plant.