梅山群的再定位、区域对比和构造含义

REPLACING OF MEISHAN GROUP IN NORTH DABIE MOUNTAINS AND ITS CORRELATION AND TECTONIC IMPLICATION

金寨地区新的１∶５００００区调成果表明，梅山群并不是原来认为的那样是变质的石炭系，它实际上包括未变质石炭系、绿片岩相佛子岭群和角闪岩相变质岩三部分地质体，彼此构造接触，应予以解体。新定义的梅山群可能是经受了强协调化作用的变质混杂堆积，代表秦岭—大别造山带前中生代的主缝合带，隔开了以北晚泥盆世—石炭纪的杨山煤系和以南同时代的南湾—诸佛庵组变质复理石。梅山群沿走向向东可与卢镇关群。

The results of new mapping work carried out in 1993—1995 in Jinzhai area,Anhui Province show that the Meishan Group, generally accepted as metamorphic Carboniferous,actually contains three different parts including non metamorphic Carboniferous,greenschist facies of Fuziling Group and the amphibolite facies sequence,faulted contact each other. So it should be deintegrated. The re defined Meishan Group seems to be a metamorphic melange,has been coherentized and represents the pre Mesozoic main suture of Qinling Dabie orogen,separated the Late Devonian Carboniferous Yangshan coal bearing sequence from the southern meta flysch Nanwang Zhufuan Formation. Along strike the Meishan Group can be correlated with Luzhenguan Group occuring in the eastern section of Dabie orogen and the Shangcheng Group distributed in the eastern and western Henan respectively.