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| The effect of applying large scale magnetic measurement method to the prospecting for gold deposits in Xiao Qinling Mountains area |
| SHEN Sui-Shui, LI Zhi-Shi, YANG Shou-Qu |
| No. 1 Geological Survey for Mineral Resources, Henan Bureau of Geology and Mineral Resources Development, Luoyang 471023, China |
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Abstract The large-scale magnetic measurement for the prediction of gold blind orebodies in the depth and lots of field magnetic measurement tests and engineering verifications demonstrate that, during the formation of gold deposit, the thermal energy produced by faulted structure cutting through the depth and the multi-periodic magmatic invasion as well as the movement of the mantle and faulting resulted in the remelting, migration and chilling of the gold-rich wall rocks and thus caused the remigration, redistribution and re-concentration of gold, leading to the decoloration and demagnetization of magnetic rocks along the structural zone and the formation of regional negative magnetic anomaly area. Using the high precision magnetic measurement method and utilizing the intensity and scale of the magnetic anomaly, we can delineate the gold-related segment characterized by relatively strong mineralization and alteration. With some practical examples, the authors describe the concrete working method for applying magnetic measurement method to delineating gold-related mineralization enrichment segment, with the purpose of making the magnetic measurement method play an important role in search for gold-related mineralization-alteration zone.
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Received: 31 July 2013
Published: 10 August 2014
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