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鍏抽敭璇�: 鑳朵笢閲戠熆, 鐜茬彂澶嶅紡宀╀綋, 閲嶇鑱斿悎鍙嶆紨, 涓夌淮鍙鍖�, 鍓ヨ殌娣卞害

Abstract:

The Linglong complex rock mass锛宎 prominent large granite body located in the northwest of Jiaodong锛宻erves as the principal ore-hosting rock within the Jiaodong gold concentration area.Notably锛実old deposits associated with granite as the primary wall rock constitute over 90% of the total metal reserves in this region.This complex primarily comprises the Late Jurassic Linglong intrusive rock锛宎long with the Early Cretaceous Guojialing锛學eideshan锛孡aoshan锛宎nd Yushan intrusive rocks锛宎mong others.The Linglong complex rock mass锛宎 significant intrusive rock formation in eastern China锛宨s crucial for understanding regional geological structures and informing mineral resource development.Utilizing high-precision gravity and magnetic data at a 1鈭�50 000 scale from the Jiaodong area锛宑ollected since the early 21st Century锛宎nd constrained by existing geological锛宒rilling锛宎nd deep geophysical survey profiles锛宼he 2D geological characteristics of 47 sections in the northwest of Jiaodong were comprehensively interpreted by using the gravity and magnetic inversion method with man-machine interaction.Based on this foundation锛宎 three-dimensional model of the Linglong composite rock mass has been developed utilizing a 3D visualization platform.Comprehensive ana-lysis reveals that the Linglong composite rock mass exhibits an irregular mushroom cloud-like morphology锛寃ith a central thickness measuring approximately 15 kilometers.The predominant component of this complex is the Late Jurassic Linglong intrusive rocks锛寃hile the core may contain a substantial Cretaceous A-type granite intrusion.Although these formations appear sporadically on the Earth鈥檚 surface锛宼hey are interconnected at depth and exhibit a significant scale of occurrence.Drawing upon findings from prior studies concerning the erosion degree of intrusive rocks锛宎s well as the age and rate of large-scale crustal uplift锛宨t is inferred that the Linglong complex rock mass was situated at a depth of approximately 30 km to 35 km during the Late Jurassic period.This research holds significant reference value for comprehending the post-mineralization alteration and preservation of the Jiaodong gold deposit锛宎s well as for predicting and assessing deep gold resources.

Key words: Jiaodong gold mine, Linglong complex rock mass, gravity-magnetic joint inversion, 3D visua-lization, erosion depth

涓浘鍒嗙被鍙�: 

• P618.51