The Analysis Of Skarn Type Deposit Gravity And Magnetic Anomaly Characteristics In Gangdise Metallogenic

This thesis starts from Gravity and Magnetic anomaly Characteristics researchedin Tibet Gangdise Metallogenic Area. The main target to generalize Geophysical signsof Skarn Type Deposit in Gangdise Metallogenic Area.Based on1:1000000and1:200000regional Aeromagnetic and gravity data, regional Aeromagnetic and gravitydata was processed and calculated, accurately reflect the characteristics of theabnormal datum. It can have a preliminary understanding of the whole regionalanomaly features throughout the Gangdise Area.Further combined with the geologicaldata and anomaly characteristics of the typical skarn type deposit in Gangdise Area,the regularity of prospecting skarn type deposit was summarized, at last summed upfor geophysical sign of skarn type deposit.Skarn deposits with developmental role in the formation of the contact intoaccount characteristics of skarn mineralization is a prerequisite for the role, oreprolific in skarn, followed by alteration of the rock or surrounding rock. Acid rock inthe relevant regional aeromagnetic high and low gravity anomaly belt, local magnetichigh, the local gravity anomalies. Aeromagnetic positive and negative anomaliesRooms, Air magnetization corresponds very positive anomaly on the often acidic rock,and carbonate rocks on aeromagnetic and gravity anomalies are weak, so magneticanomalies can be delineated in acidic rock.According to the anomaly characteristics of the skarn type deposit,And it formedin intermediate-acid magmatic rocks and carbonate rocks of the geologicalcharacteristics of the contact zone.By comparing the anomaly, concluded thatintermediate-acid rock mass and skarn type deposit distribution relationship betweenbelt, The way of to judge whether the three superposition. In this way,predict the inGangdise Metallogenic belt of skarn type deposit metallogenic prospectareas.Forecastprospects are mainly concentrated in the north and south Gangdese two largeaeromagnetic anomaly belt,accounting for about75%in thesouth Gangdise area.