摘要
老湾花岗岩的岩石化学、稀土元素和同位素特征指示出老湾花岗岩源于下地壳经部分熔融作用形成。源岩中含有壳源和幔源物质，具类似于高钾钙碱性安山岩的岩石化学特点。详细的研究表明了早元古界桐柏山群不能成为老湾花岗岩的源岩。模拟的太古代岩系岩石化学成分经高程度的部分熔融作用可以形成老湾花岗岩。
The lithochemistry,REE and isotope characteristic of strontium,oxygen and lead of Laowan granite show that the granite originates from lower crust by partial melting.The lithochemical characteristic of source rock containing crust and mantel substance bears analogy to that of high potassium calc alkali andesite.Early Proterozoic Tongbaishan group cannot be the source rock of the granite by study in detail.But simulation rock composition of the Archaean can form granite if partial melting grade is high.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
1999年第5期6-11,共6页
Journal of Hefei University of Technology：Natural Science
基金
地质矿产部"九五"重大基础项目
关键词
花岗岩
源区成分模拟
岩石化学
稀土元素
Laowan granite
simulation source region composition
high calc alkali magmatic rock
