燕山地区金矿床包裹体成分特征

The characters of fluid inclusions of gold deposits in Yanshan region

燕山地区金矿床主要有 5种类型 ,并明显地分为南北两个成矿带 ,其流体包裹体的成分特征也存在显著差别。北矿带主要表现为高H2 O、低CO2 ,K+/Na+值低 ,K+、Na+含量高 ,盐度低等特征。南矿带则主要表现为低H2 O、高CO2 ,K+/Na+值稍高 ,Ca2 +含量高 ,盐度高等特征。阐述了产于变质岩和侵入岩中两类金矿床包裹体成分的差异和成矿流体成分的差异。

Yanshan area can be divided into south and north mineralization belts. There are five types gold deposits in this area. Study shows that the characters of the gold deposits in two belts are different. H 2O,K + ,Na + are higher and CO 2, K +/Na +, salinity are lower in north belt ,and in south belt it is on the contrary , especially, Ca 2+ is higher in south belt. at the same time Study shows the features of fluid inclusion composition from the deposit occurred in intrusive rock and metamorphic rock are different.