|
Metallogenic series has been an indispensable part of the geological research, metallogenic regularity and metallogenic series of northern Tibet Bangong Lake - central region of the Nujiang River metallogenic belt (suture) had low level of research and work not comprehensive enough. On the basis of previous work, the first comprehensive system of mine pool genesis and sub-series divided. Bangor County in Tibet, found in the south, the north, the west side of the day that is (bismuth indium), snow, such as copper polymetallic ore and Scotia cable (copper and molybdenum), as well as up to such wrong, North pull town deposit near a series of higher Ni content ultrabasic rocks (dot) describe the characteristics of the stratigraphy, tectonics, igneous rocks, deposits (of), spatial distribution, petrological characteristics and petrochemical characteristics of rare earth elements, trace elements and isotopes The geochemical characteristics of diagenetic mineralization age. Metallogenic sub-series is led mainly skarn genesis deposit. Scotia cable Mining metallogenic belt in the middle of a typical skarn-type copper deposit diagenetic mineralization age of 116Ma, is a late Yanshanian. Mafic ultramafic rocks Deposits era is also close to the Yanshanian. Iron, nickel qualitative deposits in mafic rocks formed, copper and neutral - in acid rock. Metallogenic belt in the middle of the skarn type deposits of sulfur source strata sulfur-based mixed sulfur. A source of carbon to the stratum carbon-based, mixed with magma carbon. Magma source, the source of lead based, homogeneous lead isotopic composition. The combination of carbon, oxygen, lead, strontium isotope and inclusion studies show that skarn mineralization solution derived from mixed magmatic water, precipitation in the late. Diagenetic material sources, mineralization pluton is mainly mixed source (transitional type) granites series, that derived from the the sialic shells or lower crust. Appear in this area mafic and ultramafic rocks by basaltic magma from partial melting of the upper mantle in the early crystal fractionation process, stacked to form the bottom of the magma chamber. Scotia claim the deposit is a low-temperature deposits, deposit formation is a result of the interaction in the low-temperature gas-liquid and wall rock. Copper, iron, bismuth, indium mineralization age are Bangong Lake - Nujiang ocean south (ie Gangdise plots) dive to make it closed after collision stage. Metallogenic belt in the middle of bismuth, indium content of the average grade of the industrial-grade requirements. The major form of indium as an independent mineral, mineral species hydroxyl indium stone and natural indium. Bismuth mineral species for bismuth, sulfur and copper ore, natural bismuth, sulfur bismuth copper galena, sulfur, bismuth silver four kinds of minerals. Bismuth, indium content samples are all located in the skarn type deposits. Metallogenic sub-series model, circle the the three prospecting forecast target area, a Bi, In the high content of skarn type prospecting targets, two high Ni content of mafic ultramafic rocks prospecting targets.
|