摘要
在华北地台太古宙高级变质区和花岗岩,绿岩带内系统采集了变质杂岩体和变质火山岩样品2775个,组合成339件分析样,采用15种分析方法对样品进行测试,同时由国际公认的国家一级地球化学标准物质监控分析质量,提出了华北地台长英质片麻岩、变粒岩。
As many as 2775 samples of metamorphic rock. and metavolcanic rocks were systematically collected from Archean high-grade metamorphic terrains and gran- ite-greenstone belts within an exposed area of about 120 000 km2 in North China Plat- form. The samples were then mixed into 339 composite analytical samples and were ana- lyzed by 15 kinds of method using certified reference materials for data quality monitor- ing. Average contents of 13 major compositions and 64 trace elements for 26 metamor- phic rocks,such as gneiss, leptite, granulite, and amphibolite were given.
关键词
华北地台
太古宙
变质岩
平均化学组成
化学成分
North China Platform,Archean, metamorphic rocks, averag. chemical composition