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摘要: 系统划分大地构造相可以加深对大洋岩石圈和大陆岩石圈之间构造体制转换的认识,有助于开展成矿远景预测和资源潜力评价。根据河北省大地构造相的基本特征,将其划分为3个相系、5个大相、19个相,并进一步划分出亚相。探讨了大地构造相与成矿的关系,认为成矿作用是在一定的大地构造背景下发展演化的,并受到大地构造环境的制约。天山—兴蒙造山相系成矿主要与华力西期侵入岩有关,矿产主要为萤石,零星赋存铍矿、钨矿、铅锌矿; 华北克拉通相系是重要的成矿相系,产有与条带状铁建造(banded iron formation,BIF)有关的铁矿床,与花岗-绿岩带有关的金矿床,与古岛弧亚相有关的沉积变质铁矿、滑石、菱镁矿、石墨等; 东部造山-裂谷相系的成矿与火山岩相、沉积岩相、侵入岩相有关,以接触交代型铁(铜)矿、斑岩型铜钼矿和岩浆热液型金矿为主,另赋存有铅锌矿、锰银矿、煤矿等。研究可为分析区域成矿作用形成的大地构造环境及其演化过程提供成矿地质环境与构造演化阶段的背景资料,为成矿规律和矿产预测研究提供各类矿产预测类型的地质建造与成矿构造特点。Abstract: The systematical division of tectonic facies can deepen the understanding of tectonic transformation between ocean and earth crust, and it is helpful to carry out mineralization prospects prediction and resource potential assessment. According to the basic characteristics of tectonic facies in Hebei Province, the tectonic facies are divided into 3 facies series, 5 macro-facies, 19 facies and several sub-facies. The authors in this paper discussed the relationship between tectonic facies and mineralization, and concluded that development and evaluation of mineralization was under a certain tectonic background, and different mineralization was constrained by tectonic environment. Tianshan-Ximeng orogenic system is mainly related to the variscan intrusive rocks, and the main ores are fluorite, with scattered beryllium, tungsten and lead-zinc. North China Craton is an important metallogenic facy, which contains iron deposits related to the banded iron formation of BIF, gold deposits related to the granite-greenstone belt, and the sedimentary metamorphic iron, talc, magnesite and graphite related to paleo-island arc subfacies. Themetallogenesis of orogenic-rift facies series in Eastern China is related to volcanic, sedimentary and intrusive lithofacies, and is dominated by contact metasomatic iron (copper), porphyry copper-molybdenum deposits and magmatic hydrothermal gold deposits, with lead-zinc mine, manganese silver mine, coal and so on. This research could provide background material of metallogenic geological environment and evaluation stage for tectonic setting and evaluation process in the study area, and geological formation and metallotectonics characteristics of different minerals in metallogeny and mineral prediction.
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Key words:
- tectonic facies /
- metallogenesis /
- tectonics-rock assemblage
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