Rock Magnetic Analysis of Igneous Rocks and Its Geological Significance in Xiangshan,Jiangxi Province
To acquire accurate physical properties of the igneous rocks within the Xiangshan volcanic basin in Jian-gxi,facilitating deep geophysical uranium exploration,the magnetism of the three main igneous rock types in the Xiangshan region—porphyroclastic lava,rhyodacite,and granite porphyry—has been comprehensively analyzed.Rocks of the same lithology exhibit significant magnetic differences across regions.It shows that the porphyroclas-tic lava comprises magnetite/hematite mixtures and magnetite-dominated types.The rhyodacite is classified into magnetite/hematite mixed type,hematite-dominated type,and the granite porphyry exhibits weak magnetism with little variance.The magnetic halos of porphyroclastic lava indicate ancient crater locations.The magnetic signa-tures of typical volcanic rocks in Xiangshan have been identified,paving the way for locating ancient/sub-volcanic crater mineralization institutions and conducting deep uranium exploration.
igneous rocksrock magnetismmagnetitehematiteXiangshan uranium ore field
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