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The Research On The Distributing Law Of Ore-forming Element And The Tectono-metallogenic Characteristics Of Dongxiang Copper Deposit

Posted on:2004-02-29Degree:MasterType:Thesis
Country:ChinaCandidate:S H FuFull Text:PDF
GTID:2120360092996263Subject:Structural geology
Abstract/Summary:PDF Full Text Request
Dongxiang copper deposit is located at the transition zone between Cathaysia and Jiangnan terrains, which is Geotectonically included in Jiangxi-Guangxi Diwa System, Southeast Diwa Region. Dongxiang copper deposit is a part of northeast Jiangxi colored-metal zone. In this paper, based on former researching works and regional geologic background analysis, we studied the distribution law of copper and geotectonic metallogenic characteristics of the ore deposit, and forecasted copper enrichment trend from copper deposit geologic characteristics' view, aiming at full understanding the metallogenic characteristics of Dongxiang copper deposit. We propose the concept of Digital Tenor Model(DTM) for the first time, and applied it in practice to solve some problems of deposit. On the base of basic geologic reference of the deposit, we designed many Digital Tenor Models of different ore-bodies, prospecting lines and profiles. We could use those models to study the shape, the distribution and the scale of ore-bodies, and learn the location and distribution of copper deposit. We could also use the model to reveal some information about effects of regional stratum, faults and magmatic rocks on ore-rich body, and to help solve some practical problems during mining and laneway digging. After considering practical conditions of deposit, we applied Gamma Spectrometry(GS) methods to the whole deposit area and Shallow Seismic Exploration(SSE) methods to the west of No.63 prospecting line of VII ore-body. Based on field and theoretical studies of five Shallow Seismic Exploration profiles and twelve Gamma Spectrometry profiles, we designed five experimental drills, and forecasted the future of exploration. From above analysis and research, we can draw some conclusions as follows:1. The complexity of metallogenic mechanisms of Dongxiang copper deposit have close relationship with it's geotectonic background. Dongxiang copper deposit located in the transition zone between Pingxiang-Guangfeng deep faults and northeast Jiangxi deep faults, and in the transition zone between Cathaysia and Jiangnan terrains. As results of mix of deep mantle-source materials and shallow metallogenic materials, and tectonic movement of south unit and north unit, Dongxiang copper deposit become a multi-metal deposit especially enriching Cu, together with Fe, W, S, Ag, Au, Bi, Cs and Te etc..2. Ore-forming of copper deposit has much to do with the geotectonic of deposit area. The studied deposit area is located on a monocline geotectonic unit divided by several groups of faults. Therefore, the secondary widen transverse and lognitudinal drapes may have great influence on ore forming and location. Faults distributed extensively in the deposit offer essential channels and space for activation and enrichment of metallogenic materials. NE-NEE orientation faults are the most important ore-controlling tectonic, as is especially the case for Fl fault, which traversing the whole deposit area.3. We can apply these Digital Tenor Models to solve problems confronted during deposit exploration. Those models can help study shape, scale and distribution of different ore bodies in the deposit area, reveal the relationship between tectonics ofthe deposit area and copper deposit realization, they can also offer some information for deposit exploration and laneway digging.4. The Shallow Seismic Exploration technology and the Gamma Spectrometry technique reveal the tectono-metallogenic characteristic of the ore body, so as the storing place of mine. Through the study we know the valley of syncline and the peak of anticline are all good storing places of ore-forming element. To form large industrial ore deposit, the condition of magma channels and the metallogenic fluid must be up to the mustard synchronously.
Keywords/Search Tags:Dongxiang copper deposit, Digital Tenor Model, Tectonometallogenic characteristic, Shallow Seismic Exploration
PDF Full Text Request
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