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在库尔斯克地磁异常区(KMA区)的前寒武系内,查明井研究了某些被米哈伊洛夫群火山形成物所充填的晚太古代绿岩带。剖面下部岩石由喷出的科马提岩建造组成,并呈科马提玄武岩、辉石料马提岩和橄榄科马提岩等的岩流互层产出;剖面上部产出的是拉斑玄武岩流组成的厚地层,这些拉斑玄武岩已转变为阳起角闪显微角闪岩和角闪显微闪岩。该群总的厚度为1500—3000米。超基性岩(蛇纹石化橄揽岩、变辉岩)
In the Precambrian in the Kumash area (KMA area), Discovery wells investigated some of the Late Archean greenstone belts that were filled with Mihajloofu volcanic formations. The lower part of the rock is composed of expelled kamamatite rock and is interbedded with lithofacies of the Kemati basalt, pyroxene matiole and olive komatiite. The upper part of the profile produces tholeiite basalt Flow composed of thick formations, these tholeiite basalts have been transformed into the Yangjian hornblendeep amphibolite and hornblende amphibolite. The total thickness of the group is 1500-3000 meters. Ultrabasic rocks (serpentiniferous olivines, metamorphic rocks)