摘要
为探讨贵州西部晚古生代裂陷作用及其与成矿作用的关系,文章系统识别了贵州西部裂陷构造,分析了各级别构造发展阶段特点、各类别地质环境特点及其与成矿作用的关系,并对贵州西部晚古生代成矿系列进行了修订和完善。研究得出,全区共有3个矿床成矿系列、7个亚系列、18个矿床式,其中部分与晚古生代裂陷构造作用有密切关系:1贵州西部晚古生代因板内拉张形成了裂陷构造,以及裂陷槽盆与台地相间排列的古地理格局;2峨眉地幔热柱活动是在地壳岩石受裂谷作用破坏最强烈的阶段沿着构造薄弱地段发生的,裂谷构造对岩浆活动产物的就位有一定控制作用;3海西期以陆内裂陷为主,主要形成了多种沉积型矿产的矿体及一些后生热液型矿种的矿源层,其中同生断裂对于沉积、成矿产生了积极作用;4印支期以升降运动为主,而燕山期以水平运动为主,因此主要是燕山期导致大规模褶皱造山和断裂活动,导致晚古生代地质体产生了后生成矿作用,形成了较多的金、铅锌、汞、锑等低温热液矿产。
To study the Late Paleozoic rift structure basin and its relationship with mineralization in western Guizhou, the authors first systematically identified the rift structure in this area, and analyzed the characteristics of tectonic development stage at all levels as well as the geological environmental characteristics and their relation- ship with mineralization, and then revised and perfected the metallogenic series in the Late Paleozoic in western Guizhou. There are 3 metallogenic series, 7 sub-series, and 18 deposit types in this area, with a part of them being closely related to Late Paleozoic basin tectonic setting. Some conclusions have been reached ： In the Late Paleozoic, the lacunae formed due to tension in the interior of the plate in this area, thus exhibited the alternate arrangement of chasmic trough and basin; The activities of the Emei mantle plume occurred in the tectonic weak location at the phase of strongest rifting, and the rift structure had certain control effect on Emeishan basalt magma activity; There were mainly intracontinental lacunae basins in Hercynian, mainly forming the deposi- tional mineral orebodies and part of the source bed of the epigenetic hydrothermal minerals, and syngenetic fault exerted a positive role in sedimentation and mineralization; There was mainly lifting movement in Indosinian period, and was mainly horizontal motion in Yanshanian epoch. Yanshanian epoch, therefore, led to large-scale fold orogeny and faulting that caused epigenetic mineralization in geological bodies in Late Paleozoic, forming abundant gold, lead and zinc, mercury, antimony and other low temperature hydrothermal minerals.
出处
《矿床地质》
CAS
CSCD
北大核心
2015年第6期1155-1171,共17页
Mineral Deposits
基金
贵州省矿产地质与区域成矿规律综合研究项目(编号:12120114058401)
贵州省地矿局2009年度重大科研项目(水城-紫云-南丹晚古生代裂陷作用及其与主要矿产的关系)基金联合资助
关键词
地质学
裂陷构造
成矿作用
成矿系列
晚古生代
贵州
geology, rift basin evolution, mineralization, minerogenetic series, Late Paleozoic, Guizhou
