摘要
青岛崂山晶洞碱性花岗岩Rb-Sr全岩等时线年龄为134Ma,I_(Sr)=0.7064;石英正长岩和黑云母花岗岩t=146Ma。I_(Sr)=0.7050。青岛岩基全岩的δ^(18)O值为4.8至8.2‰,δD值为-98至-145‰,H_2O含量为0.59至0.07wt％。大气降水热液-岩石相互作用和岩浆开放体系去气作用是造成晶洞碱性花岗岩^(18)O和D贫化的重要原因。
The age of Rb-Sr whole rock isochron of Laoshan miarolitic alkaline granite is 134Ma, I_(Sr)=0.7064. The age of quartz syenite and biotite granite is 146Ma, I_(Sr)=0.7050. The ranges of δ^(18)O and δD values of Qingdao granitoid batholith are from 4.8 to 8.2‰ and -98 to-145‰, respectively. The water contents are from 0,59 to 0.07wt％. Meteoric hydrothermal water-rock interreaction and magmatic degassing of open system have been both responsible for the ^(18)O and D depletions of miarolitic alkaline granite.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第3期37-44,共8页
Acta Petrologica Sinica
基金
国家自然科学基金NSFC-4860074
关键词
碱性
花岗岩
同位素
地球化学
Miarolitic alkaline granite
Isotopic geochemistry
