Charnockite Formation and Early Precambrian Crust Evolution in Yishui Area, Shandong Province, China

摘要

Charnockite and granulite in Yishui area, Shandong Province are located in the middle part of the Tancheng-Lujiang fault zone, eastern China. Field studies have shown that the charnockites, derived from the adjacent granulites, are classified as three types: enderbite, garnet-enderbite and hypersthene-trondhjemite. In addition, two generations of minerals are present in the charnock- ites: the relic minerals such as garnet, hypersthene and clinopyroxene, and the necorystallized minerals such as plagioclase and K-feldspar. The relic minerals occurring in the granulite facies stage were affected by the later partial melting.