东北地区大地构造演化与成矿制约

    TECTONIC EVOLUTION AND MINERALIZATION CONSTRAINTS IN NORTHEAST CHINA

    • 摘要: 东北地区处于华北板块、西伯利亚板块与西太平洋板块交汇部位, 是研究华北克拉通、古亚洲洋构造域、古太平洋构造域复合造山与成矿作用的重要地区. 东北地区成矿地质条件优越, 是我国战略性矿产资源找矿的重点片区之一. 2011年以来, 为保障我国资源能源可持续发展和重大基础地质问题的解决, 国家逐渐加强了东北地区基础地质调查和研究工作, 在东北地区主要成矿带、盆-山结合带及资源基地开展了大量1:5万区域地质矿产调查、成矿地质背景及综合研究等工作, 取得了一大批基础性和原创性地质成果, 填补了东北地区中大比例尺地质调查空白. 本文以“东北地区区域地质志”项目为依托, 对2011年以来开展的基础地质调查项目取得的新数据和成果进行了系统梳理, 总结了东北地区取得的主要基础地质研究成果或进展. 在此基础上, 进一步分解了华北克拉通、兴-蒙造山带等大地构造单元, 恢复了古亚洲洋、鄂霍次克洋、古太平洋构造演化历史, 完善了东北地区大地构造格架, 并探讨了其对区域成矿作用的制约, 为新一轮找矿突破战略实施提供基础地质支持.

       

      Abstract: Northeast China, located at the convergence of North China plate, Siberian plate and Western Pacific plate, is an important area for studying the composite orogeny and mineralization of North China Craton, Paleo-Asian Ocean tectonic domain and Paleo-Pacific tectonic domain, and also one of the key regions of strategic mineral resources prospecting due to its superior metallogenic geological conditions. Since 2011, China has continuously strengthened the basic geological survey and research work in Northeast China, carrying out a series of 1:50 000 regional geological and mineral surveys, metallogenic background and comprehensive studies in the main metallogenic belt, basin-mountain junction belt and resources base in the area, to ensure the sustainable development of resources and energy and solve major basic geological problems. Lots of basic and original geological achievements have been made, which have successively filled the blank of large-scale geological surveys in Northeast China. Relying on the Regional Geology of Northeast China project, the study systematically sorts out the new data and results obtained from the basic geological survey projects since 2011, and summarizes the main basic geological research and achievements in Northeast China. On this basis, the tectonic units of North China Craton and Xing'an-Mongolian orogenic belt are further decomposed, which have restored the tectonic evolution history of the Paleo-Asian Ocean, Okhotsk Ocean and Paleo-Pacific Ocean, and completed the tectonic framework of Northeast China. With the discussion of the tectonic constraints on regional mineralization, the results will provide basic geological support for the new round of prospecting breakthrough strategic action.

       

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