The Research On Superimposed Mineralization And Prospecting Direction In The Yunnan Pulang Porphyry Copper Deposit

Yunnan Pulang porphyry copper deposit located the southwest of Sanjiang metallogenic belt, originated in GeZa structure-magmatic arc of which the southern YiDun island arc, located in central of the GeZa copper polymetallic ore prospecting ready area, are often considered to be representative of the Indo-Chinese epoch porphyry metallogenic, as Asia's single largest ore reserves of porphyry copper deposit, it has its particularity in our porphyry copper deposit, Study of the deposit on the GeZa arc zone base Geology and Mineral Resources Evaluation of prediction are of great significance. Pulang porphyry copper deposit in Pulang- Hongshan copper polymetallic ore subzone the southern margin, Mine strata is Triassic statistically Tumugou group, Main outcropped indo-chinese epoch plant compound acid porphyry or bin rock, tectonic fracture, strongly altered rock, Typical of the "porphyry" alteration zoning.The area in addition to the formation of Indo-Chinese epoch porphyry, skarn type copper polymetallic deposit, also found Xiuwachu tungsten and molybdenum mine,Relin polymetallic ore, Tongchanggou Mo-polymetallic deposit, Hongshan copper-molybdenum ore etc in late Yanshan porphyry depositsTherefore, this article of "critical infrastructure ready Prospecting Geological Research" projects under the "Shangri-La County, Yunnan Province region Geza ready copper polymetallic ore exploration area key basic geological research" project work "Southwest Sanjiang metallogenic belt southern section of Geology and Mineral Resources Survey" project under the "Southwest Sanjiang metallogenic belt south section of important mineral potential target selection and investigation" based project work, to carry out the " Yunna Pulang porphyry copper deposit superimposed mineralization and prospecting direction of research ".by Pulang Mining lithologic structural mapping and alteration mineral mapping, discussion superimposed mineralization, Perfection metallogenic model, combined with the alteration mineral combination distribution characteristics, prospecting establish prediction model, delineated prospecting target area.Through the Pulang mining area of lithology-tectonic fill(Ed.) map, further find out the space distribution of the intrusive rocks and their relationship with the mineralization; based on field geological observation, Pulang I main orebody with copper quartz monzonitic porphyry capture quartz diorite porphyrite?In the adit PD1 Copper bearing quartz vein and gas-liquid cryptoexplosive breccia(cone) penetration the early ore bearing porphyry?Molybdenite body along the porphyry copper(vein) in the late tectonic fissure filling geological characteristics, in combination with light thin section microscopic observation?scanning electron microscopy(sem) analysis?distribution of trace rare earth elements and ICP-MS zircon U- Pb chronology study, confirm the deposit Objective existence superimposed mineralization.Through the Pulang firld alteration mineral mapping, mastered the near-infrared alteration mineral analysis method, out closely related to mineralization alteration mineral assemblages: The analysis results show, Alteration minerals are kaolinite, epidote, Mg- chlorite, illite, montmorillonite, mica, lapis lazuli, diopside, tremolite, spodumene, through chlorite, hornblende calcite, the main alteration minerals kaolinite, epidote, Mg- chlorite, amphibole and mica etc. I main orebody on the distribution of altered minerals are mainly biotite(Bi), kaolinite(Kao), white mica(Mu) and sericite(Se), and a small amount of Mg- chlorite(Ch), I main orebody in the east and west on both sides of the quartz monzonitic porphyry of the distribution of the main alteration mineral types and the distribution of the main ore body, quartz diorite porphyrite in distribution of the main alteration mineral for epidote(Ep), hornblende(Am) and Mg- chlorite(Ch).Based on the superimposed mineralization research, to further improve the metallogenic model, with the alteration mineral mapping results and geophysical exploration marks, prospecting prediction model is established, target area for prospecting uranium ore-formation. Believe in both sides of the I main orebody distribution area of quartz monzonitic porphyry body has good prospecting potential, is to achieve further prospecting favorable prospecting target area. Among them, for on the eastern side of I main ore prospecting target area, In the field work found copper mineralization quartz monzonitic porphyry and granite diorite porphyry, at the same time has not yet been delineation of I main orebody prospecting line 8(yunnan geology investigation institute former prospecting line number) of eastern north adjacent, is the first choice to carry out deep engineering verification target area.