Zircon SHRIMP U-Pb dating of the amphibolite from "Heilongjiang Group" and the granite in Mudanjiang area, NE China, and its geological significance
东北牡丹江地区"黑龙江群"中斜长角闪岩与花岗岩的锆石SHRIMP U-Pb定年及其地质学意义

Lithology and geochemistry of rocks in Mudanjiang area indicate that the so-called"Heilongjiang Group"contains remnants of oceanic crust,representing formations developed in an ancient active continental margin setting.The Mashan Group in this area is the basement of the Jiamusi Massif,and the"Heilongjiang Group"represents the orogenic sequence,including Alpine-type lherzolite and amphibolite schist that has a geochemical affinity of MORB.SHRIMP zircon U-Pb dating shows that the amphibolite schist yielded a...