摘要
山东胶南地区的白云母赋存于榴辉岩及其围岩中。研究表明，白云母的化学成分与温度、压力和原岩成分有关，其阳离子数Ｓｉ一般＞３．３，属多硅白云母。白云母的晶体结构以３Ｔ型为主，ｂ０＝０．９０３０ｎｍ～０．９０５４ｎｍ。
The muscovite occurs in eelogite and its country rocks in Jiaonan area,Shandong province.Its chemical compositions are related to the temperature and pressure during metamorphism,and to the composition of protolith.Most muscovite belong to is phengite with crystal structure (Si>3.3) 3T polytype.The b 0 values are 0.903 0 nm￣0.905 4 nm.The 40 Ar 39 Ar isotopic age is about 155 Ma.
出处
《矿物岩石》
CAS
CSCD
北大核心
1997年第2期17-21,共5页
Mineralogy and Petrology
关键词
白云母
化学成分
同位素年龄
榴辉岩
围岩
Jiaonan area\ muscovite\ chemical compositions\ isotopic age
