山东省胶南地区斜长花岗岩的发现

详细信息

THE DISCOVERY OF PLAGIOGRANITE IN THE JIAONAN AREA, SHANDONG PROVINCE

Institute of Geological Survey and Research, Shandong Bureau of Geology and Mineral Exploration and Development, Weifang, Shandong

摘要: 胶南地区斜长花岗岩与中元古代变辉长岩相伴产出，由６０％的斜长石和４０％的石英组成。化学成分以高硅、低至中等的铝、低Ｋ２Ｏ为特征，与大洋斜长花岗岩相似。其单颗粒锆石ＰｂＰｂ同位素年龄是（１３７０．６±１４．３）Ｍａ。
Abstract: Plagiogranite was discovered in the Jiaonan area, Shandong province. It occurs in association with Middle Proterozoic metagabbro. The rock consists of 60% plagioclase and 40% quartz and has high Si, low to moderate Al and low K₂O, being similar in chemical composition to oceanic plagiogranite. Its Pb Pb age of single grain zircon is （1 370.6±14.3） Ma.
- Collision orogenic belt /
- plagiogranite /
- Jiaonan area