Inclusions Characteristic Of The East Tianshan Yandong Copper And Fluid Tracer

Yandong porphyry copper deposits is recently discovered in our country which is located in the junction zone of Junggar plate and Tarim plate and the late Paleozoic Era Jueluotage arc island belt of northeast Dongtianshan uplift belt. Kangguertage fracture controlled the structure ,magma and metallogenesis in the area. The dissertation is directed by the basin-fluid-metallogenesis system theory, by analysing and observing the geological background,deposit feature ,mineralization strip and the development of vein rock, as well as researching and determining the composition,property and uniformity temperature of fluid-inclusion, have found the activity feature,composition,origin and the relationship between fluid and the magma activity in order to offer the theory and direction for seeking deposits. By investigation, the author thinks has the progresses as follows: 1. By the observation, the type of fluid-inclusion is original inclusion which distributes in group or equality denseness. The diameter of inclusion is 1μm -15μm which is most salt water inclusion. The shape of inclusion is rotundity or ellipse, the minority is the shape strip or board. The ratio of gas and fluid in the inclusion is less than 10%. 2.The fluid is made up of H20,C02 etc. whose temperature is 110～240℃, thereinto the 140～190℃is important position which shows quartz phenocryst is not the result of magma action but fluid action. 3.The pH range is 0.47～6.4, the most is 0.47～1.39 which belonged acidity deposit. Deoxidize parameter changed from 0.47 to 3.66, the most deoxidize parameter range is 0.11～0.84 which show the metallogenesis under the oxidation conditions. 4.The difference is evident in the inclusion about the composition of the gas phase which shows the complexity of the fluid type and origin. In the inclusion, CH4 is predominated. The inclusion is character in rich organic material(CH4,C2H2,C2H4,C3H6,C3H8,C4H6,C6H6). 5.According to study the inclusion composition of Cu,CO2,CO2/H2O,minerala-zition of water,negative ion,by use of fluid trace, the author thinks the Yandong copper mine has the possibility of expanding to the west and the depth.