在马塔加米(Matagami)地区分布有18个以上的块状硫化物矿床,成群产在太古宙一个大火山中心内和其周围。火山岩是由拉斑玄武岩组合中海底喷发双模式的玄武岩—流纹岩岩套构成的,并被同期的辉长岩岩脉和岩床所切割,贝尔河火成杂岩产在火山岩层之下,它是一种高层位次火山的层状辉长岩一斜长岩深成岩体。这种喷出岩岩套中的玄武岩成员,具有一种前进的和完整的拉斑玄武岩富铁趋向,是代表下伏辉长岩深成 There are more than 18 massive sulphide deposits in the Matagami area, clustered in and around a large volcano center in the Archean. Volcanic rocks are composed of basalt-rhyolite rock formations erupted in sea floor at the bottom of the tholeiite assemblage and are cut by gabbro dikes and bedrock during the same period. The Beierhe igneous complex is produced under volcanic rocks, It is a high-level volcanic layered gabbro-plagioclase pluton. The basalt members of this expelled rock suite have a progressive and complete tholeiite-rich basalt trend and are representative of the underlying gabbro