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四川渡口钒钛磁铁矿红格矿区北部,分布着一套变质岩系,岩性主要为千枚状板岩、变质砂岩、大理岩、绢云石英片岩、斜长角闪片岩、条带状眼球状混合岩、花岗片麻岩等,不含迭层石。过去笼统将其划归“震旦系”。1982年底和1983年4月,笔者等几个单位的同行们,先后到野外反复观察,认为这套变质岩系与邻近未变质含迭层石的灯影组及观音崖组、列古六组岩性有显著差别,应属前震旦纪变质岩系。它是区域变质作用产物,但不是局部
A series of metamorphic rocks are distributed in the northern part of the Hongge mining area of Sichuan Ferry Vanadium Titanium Magnetite. The lithology is mainly composed of a thousand-shaped slate, metamorphosed sandstone, marble, sericite quartz schist, plagioclase amphibolite, Eye-shaped mixed rock, granite gneiss, etc., does not contain laminated stone. In the past it was generally classified as “Sinian.” At the end of 1982 and April 1983, colleagues from several units such as the author repeatedly went to the field to observe repeatedly that the metamorphic series are related to the Dengying Formation and the Guanyinya Formation and the Leukagen Formation rocks There are significant differences in sex, which should belong to the former Sinian metamorphic rocks. It is a product of regional metamorphism, but not local