| Porphyry deposits are an important source of the world’s copper, gold, molybdenum and other metals. For the purposes of the present degree of exploration and Tongchang degree Fujiawu studies have been higher, cinnabar red research relatively low level. In this paper, field reconnaissance, core catalog and analysis of laboratory experiments, theoretical research combination, completed cinnabar red deposit of fine dissection, continue to enrich the Tongchang and Fujiawu geological data to identify such deposits in mineralization geological characteristics, a combination of the type of alteration and mineralization, alteration zoning patterns established to clarify the shortwave infrared spectral features cinnabar red clay alteration minerals deposit.Through detailed and comprehensive field investigation to clarify the type and distribution of lithologic deposit on a lateral, alteration types and distribution characteristics; cataloged by core drilling to clarify the distribution of the longitudinal lithology, alteration distribution, combined with the indoor microscope observed that the deposits under the main wall rock sericite phyllite and slate, rock mainly granodiorite porphyry, locally associated with the porphyry quartz diorite; alteration zonation is porphyry centric ring zonal distribution, followed by potassium silicate with- Shiying Juan mica-based band- propylitization band, and output was patchy muddy zone; potassium silicate mineralization begins Late salinization, and reached a peak in the conversion stage mineralization, followed by quartz sericite stage; Dexing porphyry copper deposit mainly disseminated, fine veins and veinlets disseminated ore into brass master; ore minerals are mainly chalcopyrite, pyrite, followed by a small amount bornite, molybdenite, tennantite, mirror iron ore, galena, etc. Gangue minerals are quartz, followed by anhydrite, calcite, sericite, still visible in some carbonate minerals in the ore, sulfate minerals and other gangue minerals.By X-ray powder diffraction system to fix the Tongchang, alteration component and different host rock alteration and rock after Fujiawu, cinnabar red three deposits formed by the combination of the occurrence of alteration mineral content of each alteration. Studies have shown that: slate gray color weakness include feldspar-chlorite- calcite alteration of relatively fresh slate, green illite- chlorite alteration slate, sallow suicide- illitization slate and pyrite phyllic of slate; porphyry include fresher granodiorite porphyry and strong potassic porphyry, albite- feldspar-magnetite alteration porphyry, porphyry strong chlorite, chlorite- porphyry illite, illite- calcite and pyrite phyllic porphyry.By deposit alteration minerals cinnabar red shortwave infrared spectroscopy realization of clay mineral micro distinction, and Spectra identified mineral illite, dolomite, montmorillonite, kaolinite and the like. The main types of variable mineral composition illite + chlorite + muscovite,(more water) kaolinite + muscovite, illite + kaolinite, illite, muscovite + closely related, where the mineralization is green clay Stone + muscovite and illite +(more water) kaolinite + muscovite. Studies show cinnabar red clay mineral deposit there are three main absorption peak: 1400 nm, respectively structure of water near the absorption peak, the absorption peak of adsorbed water absorption peak near 1900 nm and 2200 nm Al-OH in the vicinity. Characteristic absorption peak value will vary depending on which alteration minerals and alteration zones occur to the left or right, the mica mineral mineralized zones exhibit different absorption characteristics, and based on the specific absorption characteristics of the delineation of the mineral mica orebody. |
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