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米易海塔地区五马箐组地层,前人争议较多。争论焦点主要围绕其时代归属及成因问题。通过野外实际工作,发现五马箐组片岩、片麻岩内有大量长英质脉体。据其空间展布、岩石学及稀土元素特征,判定具混合岩特征。因此认为五马箐组地层岩石组合与河口群地层存在一些可比性,时代早于会理群,晚于康定群,属区域动热变质作用及混合岩化作用形成。
Five Yi Ma Tama area strata formation, more controversial predecessors. The main focus of controversy revolves around the issue of its ownership and causes. Through the actual field work, we found that there are a large number of long quartz veins in the Wumadian schist and gneiss. According to its spatial distribution, petrology and characteristics of rare earth elements, to determine the characteristics of mixed rocks. Therefore, it is considered that there is some comparability between the stratigraphic rock assemblage of Wumaandu Formation and Hekou Group strata. The age is earlier than that of Huili Group and later than Kangding Group, and belongs to the formation of dynamic thermal metamorphism and mixed rock formation.