铁岭凡河地区元古宙地层格架建立初探

铁岭凡河地区元古宙地层始于凡河元古宙坳拉谷沉积，根据岩石地层学、生物地层学、年代地层学等研究成果，结合现代层序地层学理论，自下而上划分六个层序，即关门山层序，虎头岭层序、二道沟层序、石门层序、杨士屯层序、于北沟层序。每个层序仅由海侵体系域和高水位体系域组成，分别代表海侵退积地层结构和海退进积地层结构，而中间饥饿段则以加积为主。各层序间均为不整合，其类型包括海岸暴露带和海侵面。在此基础上，建立了区域地层格架。

STUDIES ON THE MINERALIZATION OF GOLD DEPOSITS IN LIAONING PROVINCE

Liaoning province is one of important gold deposit sources,in which the gold deposits can be divided into 6 types:magmatic hydrothermal type,continental volcanic rock type,syn ductile shear metamorphic hydrothermal type,metamorpic magma hydrothermal diplogenetic type,sand conglomerate type and river facies alluvial type(alluvial gold placer). The forming of gold is closely related with specified strata,structures,magmatic rocks. Stable isotope data show that the ore forming material of the gold deposits mainly came from old crystalline basement: Archean metamorphic complex(the first source bed)and Early Proterozoic medium epimetamorphic rocks(derived source bed);ore bearing hydrothermal mainly is magmatic water,metamorphic water and meteorogical water(in many cases,it is a mixture of two of them),in which metrorological water is the most important. There are three mineralization stages:Archean Early Proterozoic source bed and syn ductile shear zone metamorphic hydrothermal gold deposits;Late Triassic Early Yanshanian magmatic hydrothermal and diplogenetic deposits;Late Yanshanian continental volcanic rock type deposits.