秦岭群的构造变形和变质史及其时代问题雏议

THE HISTORY OF STRUCTURAL DEFORMATION AND METAMORPHISM OF THE QINLING GROUP AND ITS AGE ASSIGNMENT

摘要: 一、前言秦岭地处我国南北两大构造单元的结合要地,在我国地质发展史上的重要性是不言而喻的。近年来由于对秦岭群的时代问题颇有争议,直接影响着东秦岭地区一系列地质问题的进一步深入探讨。这样一来,秦岭群的时代问题自然就成为目前东秦岭区域地质研究中的关键问题,也是我国地质界最关心的问题之一。概括地说,关于秦岭群的时代问题主要有两种不同意见:一种意见认为秦岭群是前寒武纪古老变质岩系（黄汲清,1931;张伯声,1959;张秋生,1980;王鸿祯,1982）,其

Abstract: In this paper, the tectono-stratigraphic method is used to approach the problem of the age of the Qinling Group. On the basis of an analysis of the history of deformation and metamorphism of the Qinling Group and in combination with the characteristics of its sedimentary formation and isotopic age data, the authors consider that the geological age of the Qinling Group is neither Archeozoic nor Paleozoic, but Proterozoic.