山东招掖地区郭家岭斑状花岗岩的地质地球化学特征及其成因探讨

STUDY ON THE GEOLOGIC AND GEOCHEMICAL CHARACTERISTICS AND GENESIS OF THE PORPHYRITIC GRANITES IN THE ZHAOYUAN YEXIAN AREA IN SHANDONG PROVINCE

摘要:

招掖地区斑状花岗岩,即所谓郭家岭斑状花岗闪长岩的组成部分。自东向西有郭家岭体岩、南围岩体、北截岩体、上庄岩体、三山岛岩体,裸露面积约500平方公里,以岩基、岩株、岩枝等产于玲珑花岗岩的北部。班状花岗岩与金矿关系密切,许多金矿,尤其是玲珑、焦家式大型、特大型金矿直接产于其中或近接触带内。因而受到国内广大地质工作者的关注,先后做了大量的地质工作和研究工作,但长期以来对其成因、时代等认识不一,分歧较大。本文试在前几年工作的基础上并荟萃各方资料予以探讨,不当之处,敬请指正。

Abstract:

The porphyri(?) granites in the Zhaoyuan-Yexian area represent one part of the Linglong batholithic complex. Its petrological, mineralogical, petrochemical and geochemical characteristics, including those of mineral inclusions indicate that the porphyritic granites as the "Linglong granites" are not the product of fractional crystalization from the mantle-derived magma, but have been the product of granitization originated from the Jiaodong Group of the Archaean-Proterozoic metamorphic rocks.The gold ore de...