摘要
太行山北段—燕山地区位于中朝板块中部及其北部边缘，以铁、铜、钼、金、银、铅、锌、铀等金属矿产为特色。中生代本区进入陆内造山作用阶段，花岗质岩浆作用及与之有关的成矿作用是克拉通活化的结果。在已研究了与花岗质岩浆作用有关的成矿系列划分、特征和控制因素等基础上，本文重点探讨了成矿系统的划分、时空结构及其控制因素，指出其作为中生代陆内造山作用的结果，明显受到两期不同成矿动力机制的控制，主要由古欧亚构造域成矿系统和西太平洋构造域成矿系统组成。根据构造应力环境，可进一步划分出５个成矿亚系统和Ⅰ～Ⅳ４个成矿系列。成矿系列或矿床具有多期性，不同时代矿床空间分布成带或集中区，三叠纪矿床主要分布于燕辽沉降带北侧，早侏罗世时以辽西为主，中侏罗世时向西扩展到冀东，晚侏罗世时则以太行—燕山西段为主，早白垩世矿床广泛分布于全区，但Ⅲ成矿系列集中等间距分布在几条ＮＷ向带中。矿床这种时空分布规律受控于中生代花岗岩类岩浆活动，而中生代造山作用决定了岩浆岩的时空分布，岩浆起源演化与成矿有关。
Taihang Shan Yan Shan orogenic belt lies in the middle part and the north margin of Sino Korea plate, and it is characterized by iron, copper, molybdenum, gold, sliver, lead, zinc, uranium etc ore deposits. Since Mesozoic, the orogenic belt is controlled by an intracontinental orogenic process, and Mesozoic granitic magmatism, mineralization related to them are the result of craton mobilization. Basing on their work about the division for metallogenic series related to Mesozoic granitic magmatism, and on the study for characters and controlling factors etc. about these metallogenic series, authors discuss the division for metallogenic systems, the distributions in time space and controlling factors as a focal point in this paper. After that, they point out there is an intracontinental metallogenic process in Mesozoic era in this area, it is consisted of two metallogenic systems the paleo Europe Asia tectonic metallogenic system and the West Pacific tectonic metallogenic system. Two metallogenic systems are further divided into five metallogenic subsystems based on tectonic stress. There are four metallogenic series and many ore deposits, which distribute in different belts or areas. These Triassic ore deposits mainly distribute in the north of Yanliao submergence belt, and early Jurassic ores chiefly in the west of Liaoning province. Middle Jurassic ores extend towards west to the east of Hebei province, however late Jurassic ores mainly distribute in the west of Taihang Shan Yan Shan area. Early Cretaceous deposits distribute everywhere, but Cretaceous metallogenic series Ⅲ focus on a few NW trending belts. These distributions in time and space for ore deposits are controlled by Mesozoic granitic magmatism, and Mesozoic orogenic process might limit the distributions in time and space for granites. All ore forming are related to the origin and development of granites.
出处
《地学前缘》
EI
CAS
CSCD
1999年第2期297-304,共8页
Earth Science Frontiers
基金
地矿部"八五"重要基础研究项目
关键词
成矿系统
成矿系列
时-空分布
金属矿床
metallogenic system, metallogenic series, North Taihang Shan Yan Shan area, distribution in time and space
