摘要
徐州市泉山东麓寒武系石灰岩中,分布有浅成中性侵入岩。岩相学和地球化学初步研究表明,其岩性为闪长玢岩,其SiO2含量61.68%,Na2O含量3.80%,K2O含量3.07%,Ba、Sr、W等微量元素含量较高,轻稀土富集,重稀土亏损,Eu正异常,其稀土元素球粒陨石标准化配分模式与班井闪长玢岩和班井花岗闪长玢岩的非常相似。
The intermediate hypabyssal intrusive rocks were found near the east piedmont of Quanshan Mountain in Xuzhou in Cambrian system. Through optical microscopic observation and geochemistry analysis： it was dioritic porphyrite, and the content of SiO2 （61.68%）, Na20 （3.80%） ,K20 （3.07%） , higher micro elements of Ba, Sr, W, enriched LREE, poor HREE and positive Eu abnormal. The standard partition mode of rare earth element chondrite was quite similar to Banjing dioritic porphyrite and granodiorite porphyrite. It was concluded that the geochemical characteristics were related to the magma activity of Banjing rock mass.
出处
《地质学刊》
CAS
2011年第3期265-267,共3页
Journal of Geology
关键词
闪长玢岩
泉山岩体
地质特征
江苏徐州
Dioritic porphyrite
Quanshan rock mass
Geological properties
Xuzhou, Jiangsu
