Earth Science Frontiers ›› 2025, Vol. 32 ›› Issue (6): 338-349.DOI: 10.13745/j.esf.sf.2025.9.1

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The tectonic setting of Jurassic-Cretaceous intrusive arcs and mineralization in Northeast China

FENG Yanfang1,2(), LI Jize1, JIN Xiao1, $\boxed{\hbox{DENG Jinfu}}$2, XIE Yalin1, NIU Lu1, XIONG Yinhong3   

  1. 1. Natural Resources Survey Center, China Geological Survey, Beijing 100055, China
    2. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
    3. Kunming Natural Resources Survey, China Geological Survey, Kunming 650111, China
  • Received:2024-12-26 Revised:2025-03-28 Online:2025-11-25 Published:2025-11-12

Abstract:

During the Jurassic to Cretaceous period, the composite intrusive arcs in Northeast China can be divided into two intrusive arcs in the north and south. The north is the Great Xing’an Range-Lesser Xing’an Range intrusive arc and the south is the Zhangguangcai Range-Yanliao intrusive arc. The petrotectonic assemblage and ore deposits within the intrusive arcs of Northeast China show close spatial and temporal relations. In the northern side, the Great Xing’an Range-Lesser Xing’an Range intrusive arc shows obvious NE-trending horseshoe shapes, divided into three rings from the outside to the inside. Its rock assemblage in the order of Xidaweng-Daguokuidingzi intrusive arc (TTG suite) → Manzhouli-Lesser Xing’an Range intrusive arc (GG suite) → Yakeshi intrusive arc (G suite). In addition, the Zhangguangcai Range-Yanliao intrusive arc in the southern side consists of the Linjiang-Fusong-Suifenhe intrusive arc (TTG suite) → Ulanhot-Linxi-Chifeng-Chengde-Xianghuangqi intrusive arc (GG suite) → West Ujimqin Banner-Duolun intrusive arc (G suite). The corresponding tectonic settings are, in order, outer oceanic subduction zone → main oceanic subduction zone → inner oceanic subduction zone, and the ore mineralization is Au-Cu → Au and Cu-Mo → Mo. As the intrusive arcs mature, the corresponding ore minerals also differ, revealing the intense relationship between the compositional polarity of the intrusive arc and ore mineralization. The complex oceanic-oceanic plate convergence formed by the subduction of the western Mongolian-Okhotsk Ocean and the eastern Raohe-Hamatong Ocean, Izanagi Ocean, as well as the reactivation of the southern lithospheric discontinuous tectonic zone, promoted the Yanshanian metallogenic explosion in northeast China. Based on the exploration and research of the geological background of mineralization, it is predicted that Northeast China may become a large-scale base for gold, molybdenum, and copper mineral resources in the future.

Key words: intrusive arc, compositional polarity, metallogenic environment, Northeast China

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