鲁东胶北地区中太古代唐家庄岩群

TANGJIAZHUANG GROUP OF MESO—ARCHEAN

摘要:

１０余年来，通过对鲁东胶北地区太古宙地层的研究，原胶东群中剔除出大量的变质变形深成侵入岩，并从其底部分离出一套呈包体状态残存于花岗质岩石中的紫苏磁铁石英岩、二辉斜长角闪麻粒岩等，据此建立了唐家庄岩群。该岩群为一套经受角闪麻粒岩相高级变质的表壳岩组合，同位素测年数据为２７６３～２９３６Ｍａ，与之相伴产出的超基性岩同位素地质年龄值为２６９３～３１５０Ｍａ，其特征与鲁西地区沂水岩群相似，说明太古宙时鲁东和鲁西曾是一个统一的克拉通陆核。

Abstract:

In Last ten years,through the study on Archean strata in Jiaobei area(northeast of Shandong),many metamorphic and deformed plutonic intrusives were rejected from Jiaodong group,and seperated hypersthene-magnesite-quartzite,two pyroxene-plagioclase-hornblend-granulite from its bottom part,which occurred in graphites as enclave.On the basis of these study,Tangjiazhuang group has been established.It is a supracrustal rocks association experienced high-grade metamorphism of amphibolite-granulite phase.Its isoto...