| The north of Duolong Ore district belongs to The southern margin of the South Qiangtang –The western part of TaNiantaweng Composite terrane belt, central is the west of the Bangong Lake Nu River combination zone.Southern part belongs to west the northern Gangdese block.Stratum are early Jurassic quse formation(J1q),early- middle Jurassic Sewa formation(J1-2s), early Cretaceous Meiriqie group(K1m), and the Paleogene Oligocene Cantor group(E3k), Quaternary(Q). Basic intrusive diabase, Basic intrusive rocks are diabase.intermediate acid intrusive rock is mainly granite diorite.The key mining minerals are copper gold deposit types.By summing and analysising the complete intermediate gradient profiles of Bolong、Duobuza and Naruo, ombinning with the data of cataloging drilling, we have a research on indication of ore and rock with this method and have already analysis 14 sections intotal:Firstly, This paper has subsection statistics of the apparent resistivity and area of the polarizability values of mineral(rock) apparent resistivity of the three mining, compare ore body(rock) polarizability value with non ore body(rock), found no apparent difference between them.Secondly,it has an analysis and a comparation various types of apparent resistivity, polarization curve combination, including "high apparent resistivity-low polarization rate", "low resistivity, high polarization rate", "high resistivity, high polarization rate", "low resistivity, low polarization rate ", resistivity "two high a low" and " two low a high ",polarization "two high a low" and " two low a high ",. Through comparing these 6 kinds of characteristic curve and drilling engineering of mine and rock, We found the following conclusions: ①The ore(rock) body exist when have the same curve type, and values of ρs、ηs are similar, sometimes there are no ore(rock) body. ② The ore(rock) body exist when have the same curve type, and values of ρs、ηs are far, sometimes there are no ore(rock) body. ③ The ore(rock) body exist when have the different curve type, and values of ρs、ηs are similar, sometimes there are no ore(rock) body. ④The ore(rock) body exist when have the different curve type, and values of ρs、ηs are far, sometimes there are no ore(rock) body. ⑤There existence of some regular changes in some profiles but it is not universe. ⑥ Although some information frequently apparent in ore(rock) body parts, but it is not exclusive.In addition, according to the ore rock, buried depth, the author has made the preliminary discussion, found that it is unable to determine the buried depth, rock mass from the measurement data or data combination rule with the ladder method of electrical excitation.Based on the above results, the ladder method of electric excitation has little significance on Cu and Au mineral exploration of Duolong Ore district. |
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