论文部分内容阅读
土屋-延东是东天山发现的最大铜多金属矿田,延东铜矿是该矿田主要产铜区.延东铜矿主要矿石类型有两类:闪长玢岩中浸染状矿石和斜长花岗斑岩中细脉浸染状、块状矿石;围岩蚀变主要为绢英岩化、绿泥石-黑云母化和青磐岩化,蚀变分带不明显.成矿流体包裹体研究表明,成矿流体温度较低(均一温度为110℃~240℃),盐度变化较大(0.68%~52.5%),成矿流体组成具多源性,CH4占很大比例,以富含有机质成分为特征.氢、氧同位素组成表明,早期成矿流体以岩浆水为主,晚期为上升岩浆流体与地层中大气降水混合产物.含矿斜长花岗斑岩体SIMS锆石U-Pb年龄为(338.3±1.4)Ma,含矿岩体形成时限为早石炭世.
Tuwu-Yandong is the largest copper-polymetallic ore field discovered in the east Tianshan, and the Yandong copper mine is the main copper-producing area in the ore field. There are two main types of ore in the Yandong copper mine: disseminated ore and diagonal In the long-granite porphyry, veinlets and lump ore are disseminated, and the alteration of wall rocks is mainly sericite, chlorite-biotitization and metamorphic rocks, and the alteration zoning is not obvious. The results show that the temperature of the ore-forming fluid is low (the homogenization temperature is 110 ℃ ~ 240 ℃) and the salinity varies greatly (0.68% ~ 52.5%). The composition of the ore-forming fluid is multi-sourced, Rich in organic components.The composition of hydrogen and oxygen isotopes shows that the early ore-forming fluid is mainly magmatic water and the late is the mixed product of the rising magmatic fluid and the precipitation in the stratum.The isotopic compositions of SIMS zircon U -Pb age is (338.3 ± 1.4) Ma, and the ore-bearing rock mass is formed as Early Carboniferous.