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The Geological Characteristics and Prospecting Direction of Gongpengzi Cu-Zn-W Deposit in Heilongjiang Province

Author: LiuYu
Tutor: YeSongQing
School: Jilin University
Course: Geological Engineering
Keywords: Gongpengzi Cu-Zn-W Geological Characteristics Prospecting
CLC: P618.4
Type: Master's thesis
Year: 2013
Downloads: 24
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Abstract

Gongpengzi Cu-Zn-W deposit in Heilongjiang Province, is located east coast ofHarbin, The orebody is produced in marble and granodiorite formed skarn zone or nearby.The deposit is a typical skarn deposits,Which is mainly in the late accountable skarnmineralization, with minor residual late hydrothermal ore along the tectonic contact withpenetration, and the role of rock, metal mineral precipitation, superimposed on the skarnrock. Deposit ore-controlling factors for the formation of skarn marble and granodioriteconditions, strong folds, faults conditions. Granodiorite is the area into a major source ofminerals.Heilongjiang Province Gongpengzi tungsten deposits of copper and zinc is amedium-sized skarn deposits which is found on the1960s. The mining resources havebeen exhausted due to the long extensive over exploitation. The mine is in a serious crisisand looking for substitute resources urgently. The study carried out around the mineGongpengzi soil geochemical survey and induced polarization geophysical surveyingwork in the elevator.Soil geochemical survey results shows that the average content of Cu element is18.55×10^-9, the average content of W element is1.83×10^-9, the average content of Moelement is1.14×10^-9, abnormal trend mostly north-east, the basic structure of theregion consistent, and abnormalities in the main granodiorite to granite group andrhyolitic volcanic contact zone area.We carry out intermediate gradient in the south and west of the Gongpengzi miningarea measurements and circled11induced polarization anomalies. Exception to thegeneral trend of the north-east, the south is relatively dense anomalies in the mine and the mine to the south of the specific exceptions, mostly trending. IP anomaliescorrespond to the southern mining geological map of the Early Permian boundary surfaceon Tuen Formation, lithology is mainly sandy slate and a small amount of chert. Thereare few exceptions in granite deep as the8th gongpengzi main ore body parts. From theanalysis of physical parameters, sandstone and slate, hornfels, granite can not be causedby induced polarization anomalies inferred ore body caused by the8th. Mine mostlywestern volcanic covered to rhyolite, rhyolitic tuff, andesite, etc. mainly. IP anomalies inthe North East part of the general was trending as the tectonic line in the same direction.Among J3-1Number Exception largest area of abnormal gradient is also bigger. Theexception is in the8th orebody extends southwestward direction, surface mapping behold,marble and slate, suggesting that the anomaly is caused by abnormal mine.Through the combination of geophysical and geochemical work, structure,magmatic rocks and other geological characteristics of the preliminary analysis,Gongpengzi preliminary delineation of six ore deposits in peripheral target prediction.One deposit is located in the southwest of the predicted target located in the southernsection of the shaft portion folds, gongpengzi ore deposits in the8th southwestwardextension line. Target in the original forecast for the volcanic geological map coveragearea, according to the route geological mapping, see the marbles in the target area andslate. Inferred from the previous data, the area is not thick volcanic cover, under its coverYanshan granite. Therefore, the presence of the target area with skarn geologicalconditions. Target area J3-1anomalies for the local primary geophysical anomaly. Theforecast target from the geological characteristics, geophysical anomalies, etc. all havefavorable metallogenic conditions, found skarn body potential. Another one for the northcentral study area. Where predicted target located gongpengzi deposit faults parallel toone another in the vicinity of faults, the Jurassic volcanic rocks in contact with theYanshan granite, the contact zone and fault structure in the same direction. In thevolcanic and granite soil anomaly better, area, anomalies, high strength, closely nestedelements, concentration centers obvious. Exception to carry out a small amount of soiltrenching revealed after granodiorite initially delineated Cu ore of the body. The targetfor finding or magmatic hydrothermal porphyry-type deposits favorable location.

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