胶东——苏北——大别山榴辉岩——石榴石橄榄岩带及其地质意义

THE ECLOGITE—GARNET PERIDOTITE ZONE IN THE JIAODONG—SUBEI—DABIESHAN REGION AND ITS GEOLGICAL SIGNIFICANCE

摘要:

从山东东部经鲁南、苏北到大别山地区分布的太古界—早元古界胶东群或大别群角闪岩相变质杂岩中有众多的榴辉岩、石榴石橄榄岩及橄榄岩体出露,有些以单一岩石类型的岩体出现,有些是榴辉岩与石榴石橄榄岩或橄榄岩密切伴生,大多数岩体与围岩呈整合接触,即岩体边界面产状与围岩片麻理产状相一致。这条榴辉岩—石榴石橄榄岩带(或称为深成高压变质岩带)延绵一千余公里,宽近百公里,有数千个岩体出露,大者数平方公里,小者长仅数米。这条岩带分三个区集中出露,一是山东东部区,包括山东荣成、威海、文登和乳山;二是鲁南、苏北区,包括山东日照和莒南,江苏东海、新沂和赣榆;三是大从山东东部经鲁南、苏北到大别山地区分布的太古界—早元古界胶东群或大别群角闪岩相变质杂岩中有众多的榴辉岩、石榴石橄榄岩及橄榄岩体出露,有些以单一岩石类型的岩体出现,有些是榴辉岩与石榴石橄榄岩或橄榄岩密切伴生,大多数岩体与围岩呈整合接触,即岩体边界面产状与围岩片麻理产状相一致。这条榴辉岩—石榴石橄榄岩带(或称为深成高压变质岩带)延绵一千余公里,宽近百公里,有数千个岩体出露,大者数平方公里,小者长仅数米。这条岩带分三个区集中出露,一是山东东部区,包括山东荣成、威海、文登和乳山...

Abstract:

Ia this paper the author defined and described the eclogite—garnet peridotite zone in the Jiaodong (Eastern Shandong Province)—Subei(Northern Jiangsu Province)—Dabieshan region, and presented briefly the results of the petrological and geochemical study on the eclogite and garnet peridotite in the Dabieshan mountain area. A comparison of the basic and ultrabasic rocks in this zone with those in Xinjiang Inner Mongolia and Yanshan Depression areas was made and finally, the genesis of this eclogite—garnet per...