摘要
本文从大地构造演化角度探索了胶东地区构造演化的四个阶段（单独演化、碰撞对接、盆地形成及后期改造），并从地层建造、构造变动、岩浆活动及生成机制等方面分析了四个演化阶段与古砂金成矿关系；指出了白垩系莱阳组、王氏组和第三系黄县组、尧山组四个构造层为区内主要找矿层位；预测了莱阳盆地东北部和黄县盆地南部边缘地区为今后找矿远景区。
Jiaodong massif,a product of the coaction of subduction-obduction and nappe-shear-ing translation-shearing during land-land collision of North China landmass and LowerYangtze landmass,is composed of 3 secondary tectonic elements,namely,Jiaobei massif,Jiao-Rong terrane and Wu-Rong juncture.And the massif has experienced 4 evolutionarystages,that is,isolation,collision-combination, basin development and post-basin re-working.This paper is an approach to sedimentary formations,teconic changes,magmat-ic activity,lithofacies and paleogeography of the 4 evolutionary stages,and their rela-tions with placer gold are analyzed. Structural layers formed during the latter two evolu- tionary stages are placer-gold targets,represented by Laiyang Formation and WangshiFormation of Cretaceous and Huangxian Formation and Yaoshan Formation of Ceno-zoic. We should pay special attentions to ancient channels,lake deltas and ancientresidues in the formations. And prospect areas are north edge of the Laiyang Basin,south edge of the Huangxian Basin and the transitional zone to the Jiaobei uplift.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1996年第1期77-84,共8页
Marine Geology & Quaternary Geology
基金
山东省自然科学基金
关键词
胶东地区
构造演化
金矿床
古砂金
找矿前景
Jiaodong area tectonic evolution mineralization relation prospect
