Influenced by the subduction of the Paleo-Pacic plate,the eastern part of the North China Craton(NCC)underwent intense destruction during the Mesozoic,leading to complex magmatic activities and mineralization events t...Influenced by the subduction of the Paleo-Pacic plate,the eastern part of the North China Craton(NCC)underwent intense destruction during the Mesozoic,leading to complex magmatic activities and mineralization events that formed the Jiaodong and Liaodong gold districts.However,the currently gold proved reserves in two regions dier signicantly,sparking debate over the consistency of their controlling models.This study employs high-precision short-oset Controlled-Source Electromagnetic Method(CSEM)advanced detection technology,focusing on the Sanshandao fault in the Jiaodong district and the Jianshanzi fault in the Liaodong district,to reveal the ne-scale resistivity structures of deep controlling factors in both districts.A new structural-fluid joint controlling model for the NCC is proposed.In the Jiaodong district,the Sanshandao fault exhibits both ore-guiding and mineralization attributes,forming a structural-fluid joint step-like model.In contrast,the Qingchengzi area in the Liaodong district is shaped by the combined eects of stratigraphy,folds,and faults.Deep regional faults,induced by Mesozoic tectonomagmatic activities,intersect the strata and act as ore-guiding structures,while early strata form interlayer fracture zones under subsequent folding,constituting a structural-fluid joint ladder-like model.The ndings enrich the fault control theory of decratonic gold deposit and suggest that the gentle slopes of interlayer fracture zones around regional faults may be vital targets for future gold prospecting,indicating that substantial gold resources may yet be discovered in the Liaodong district.展开更多
基金supported by a project from the Ministry of Science and Technology National Key R&D Program of China(2024ZD10028052022YFC2903505)National Natural Science Foundation of China(42030106).
文摘Influenced by the subduction of the Paleo-Pacic plate,the eastern part of the North China Craton(NCC)underwent intense destruction during the Mesozoic,leading to complex magmatic activities and mineralization events that formed the Jiaodong and Liaodong gold districts.However,the currently gold proved reserves in two regions dier signicantly,sparking debate over the consistency of their controlling models.This study employs high-precision short-oset Controlled-Source Electromagnetic Method(CSEM)advanced detection technology,focusing on the Sanshandao fault in the Jiaodong district and the Jianshanzi fault in the Liaodong district,to reveal the ne-scale resistivity structures of deep controlling factors in both districts.A new structural-fluid joint controlling model for the NCC is proposed.In the Jiaodong district,the Sanshandao fault exhibits both ore-guiding and mineralization attributes,forming a structural-fluid joint step-like model.In contrast,the Qingchengzi area in the Liaodong district is shaped by the combined eects of stratigraphy,folds,and faults.Deep regional faults,induced by Mesozoic tectonomagmatic activities,intersect the strata and act as ore-guiding structures,while early strata form interlayer fracture zones under subsequent folding,constituting a structural-fluid joint ladder-like model.The ndings enrich the fault control theory of decratonic gold deposit and suggest that the gentle slopes of interlayer fracture zones around regional faults may be vital targets for future gold prospecting,indicating that substantial gold resources may yet be discovered in the Liaodong district.
