The application of wide field electromagnetic method in the porphyry copper deposit in northwestern Yunnan
The Pulang super-large porphyry copper-polymetallic deposit is hosted within a composite intrusive complex consisting of quartz diorite porphyry,quartz monzonite porphyry,and granodiorite porphyry,with mineralization closely linked to the intrusive bodies.To investigate the morphology and extent of concealed deep-seated intrusions and enhance deep exploration potential,wide field electromagnetic method surveys were conducted in the study area.Comprehensive data processing and geological interpretation revealed that the method effectively identifies deep-seated intrusive bodies and major structures.When compared to borehole geological data,the resistivity of large,intact granite bodies was found to be more stable,and the method demonstrated higher accuracy in delineating lithological boundaries.The results indicate that extensive composite intrusions exist in the deep eastern and southern parts of the mining area,with structurally fractured zones within these intru-sions offering significant exploration potential.These findings provide key geophysical parameters for identifying deep exploration targets in future prospecting activities.
wide field electromagnetic methodporphyry copper depositdeep explorationnorthwestern Yunnan
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