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 Wysłany: Pon 12:26, 21 Lut 2011 Temat postu: moncler milano Liaoning Jinxi East Green Fort SILV |
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Liaoning Jinxi East Green Fort SILVER Geological characteristics and genesis
Largest depression Valley, oblique cross-Star Mining magmatic rocks in space by F. Oblique fracture King up to the outbreak of alkaline basalt breccia and porphyry rocks, followed by coarse Security Bin (spot) rock,[link widoczny dla zalogowanych], Anshan Xuan Wu porphyry, rhyolite and dacite porphyry, rhyolitic tuff, granite porphyry filling According to the rocks in the lower part of tube (Ye Chuanqing, 1994),[link widoczny dla zalogowanych], mine are alkaline basalt magma evolution series. Department of crust-mantle magma source mixed units, intrusive age of the Late Cretaceous (78Ma, K-Ar method) (According to areas with volcanic activity. Geological features 2 East Green Fort silver polymetallic deposit is the main body by the silver zinc, manganese ore body, iron ore body, composed of molybdenum ore Ore Cambodia. The results show that the known ore bodies are distributed in mine breccia pipe broke in or near the fracture of the ramp by F zoning. horizontal direction. granitic porphyry M0 were out of a Fe-Zn, Pb, Ag; vertically, from surface to deep for the Mn ~ Pb, Ag, zn-M0 a Fe. orebody shape was fine stockwork, vein, lens (lenticular) and cystic, with a branching complex phenomenon. One silver lead and zinc ore body is relatively simple mineral composition of ore minerals pyrite, sphalerite mainly associated with a small amount of galena, chalcopyrite and minor tetrahedrite, pyrrhotite, magnetite and silver telluride, argentite; gangue minerals calcite, rhodochrosite-based, as well as a small amount of barite , quartz and sericite and so on. ore from the main structure form - he shaped granular structure, crushed structure, including structure, account structure, emulsion droplet-like structure and the text seems like structure; ore dense block structure, small vein , disseminated and brecciated structures such as the main structure. The study of hydrothermal lead-zinc silver mineralization is divided into four stages: (1) a hematite magnetite stage; (2),[link widoczny dla zalogowanych], molybdenite ~ a pyrite quartz stage; (3) silver metallic phase; (4) carbonate phase. and silver lead, zinc and other metals mineralized rock alteration are closely related to iron and manganese carbonate, carbonate of i and alteration of the iron ore for the serpentinization, tremolite and sliding of petrochemicals; and alteration and molybdenum mineralization is closely related to the main silicification, sericite 3 ore 31 ore Lian trapped into uniform method of physical and chemical conditions, burst method measured the formation temperature of primary metal sulfides in the 122. 9 ~ 271 �� between the range of forming pressure anonymous to 212.2 �� 3km gas composition of fluid inclusions are mainly H20, C02; liquid components of a K-Cl-Na type Ca shaking. To Cl A> F, Ca> Mg and high alkali metal Na, K content and low Na / K ratio features. Forming a high salinity solution, the change between the 23.56 ~ 68.84wtNaCI; pH value of 8.56 ~ 9.23, Eh is a 0.78 a 0.84, indicating that silver lead and zinc into mine the tail is alkaline,[link widoczny dla zalogowanych], reducing conditions for the 3.2 stable isotopes geochemistry s value of the enrichment of the order of metal sulfide pyrite> sphalerite> galena, 9 samples a Lead isotope samples have similar composition to the lower distribution of the lower crust evolution line Post. 3 dark mineral inclusions aD value of liquid changes in a 73 between a 86; a calcite products 8uO green cicada _ to + l1.4 ��,[link widoczny dla zalogowanych], converted into the value of total l'0H10 for 2.99 ��)} c-value is a 66 ��. stable isotope data show that the forming material from the deep source, the main ore-forming hydrothermal to magmatic water, meteoric water mixed in late. 4 Conclusion. East Green Fort deposit is a typical low temperature volcanic rock type (or the outbreak of breccia pipe type) filling and replacement-type epithermal Ag polymetallic deposits of molybdenum mineralization in time and space are subject to a volcanic fault structure and volcanic activity joint control, material source of deep source (lower crust or upper mantle) characteristics. faults near the sub-volcanic porphyry or breccia pipe of a developed area of the outbreak, is to find favorable areas for this type of deposit.
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