Qinghai Law Satisfied The Day Gongma Porphyry Copper With Mineralization And Prospecting Direction

Narigongma porphyry copper belt locates in the southwest of the Sanjiang north tectonic belt, the east of Tanggula Mountain in the south of the Qinghai province ,which belongs to the Zaduo county ,Yushu Zang clan autonomous state. . The studying area locates in the east of Tetisi-Himalayan tectonic area ,the north of Sanjiang tectonic belt ,the structural line turns from about east-west direction to the trasition point of south-north diretion, geotectonic position is special .The metallogenic rock are biotite and intense-silicified granite-porphyry of the early stage of Xishan .The tectonic is simple ,which is a monoclinal structure ,northwest trend ,southeast dip.The porphyry Cu-Mo deposit ,skarn Fe-Cu , hydrotherm Mo-Cu-Pb-Zn, porphyrite Fe deposit , and so on .Nariongma and YUlong porphyry copper deposit are the same metallogenic belt in the space ,it has superior ore-formatting geological condition and abundant mineral resources.A series of work have been done, including analysis of geological, geophysical, geochemical and remote-sensing information, outdoor inspection of abnormities, studying on important deposits (ore spot), contrasting with typical deposits and generalizing regional metallogenic regularity etc. Finally, the paper put up a series of oresearch promising areas. The paper focuses on the analysis of classical Narigongma porphyry copper deposit , by studying ore-deposit geology ,mineralogy ,macro structural fabric ,ore-deposit geochemistry ,isotope ,fluid inclusion etc ,we affirm that the ore-deposit type is porphyry Cu-Mo ore deposit .In this deposit ,fluid-melt inclusion is found ,which approves magma-hydrotherm is existent .According to researching mineralogy ,fluid inclusion etc ,we hold that evolvement of the porphyry magma classifies three phase ,including magma phase ,magma-hydrotherm phase and hydrotherm phase ,the three phase is correlated and transitional .The minerogenic fluids belong to H2O-NaCl-CO2 type .In the course of minerogenic fluid evolvement ,because of temperature reduce and PH augment caused by ebullience and mix effect ,is the main factor of sediment of ore-mineral copper pyrite , molybdenite and so on .The intense pyrite-sericite alteration (named phyllite alteration too)exists in the mineralized magmatic body . The abroad distributed pyrite alteration and no fresh granite-porphyry and K-alteration belt in the center of magmatic body ,which indicates that denudation depth is superficial ,the upper part of porphyry rock system may be found in fact ,which indicates rich Cu-MO ore body may lie in the deep part .By contrast...