胶北西部平度、莱州一带粉子山群研究新进展

NEW PROGRESS OF RESEARCH ON THE FENZISHAN GROUP IN THE PINGDU-LAIZHOU AREA IN THE WEST OF JIAOBEI REGION

摘要:

近年来研究发现，粉子山群祝家夼组之下尚发育一套变质碎屑岩夹含铁岩系，主体岩性为黑云变粒岩、长石石英岩、斜长角闪岩夹磁铁角闪（石英）岩。故新建小宋组，使粉子山群的地层序列更为完善。已有资料表明，粉子山群变质相可达高角闪岩相。通过区域对比，认为粉子山群与荆山群同属早元古代，为同时异地异相产物；并认为这套地层原为辽东地区辽河群的组成部分，后经远距离推覆才拼贴于胶北地体上，推移距离大约１００公里。

Abstract:

Studies in the recent years have showed that a sequence of metamorphosed detrial rocks interalated with ironstone has been found under the Zhujiakuang Formation of the Fezishan Group. The dominant lithology of the sequence includes biotite leptynite, feldspe quartzite,amphibolite interelated with magnetite hornblende quartzite. So the xiaosong Formation is established that has made the stratigraphic sequence of the Fezishan Group more complete.The date available have indicated that the metamorphic grabs of ...