發(fā)布時(shí)間：2018-03-07 03:29

  本文選題：東昆侖東段　切入點(diǎn)：哈隴休瑪?shù)V床　出處：《礦物巖石》2017年03期 　論文類型：期刊論文

【摘要】：哈隴休瑪鉬礦位于東昆侖造山帶東段,是近年來(lái)新發(fā)現(xiàn)的斑巖型鉬礦床,規(guī)模已達(dá)中型。與成礦有關(guān)的巖體是晚三疊世花崗閃長(zhǎng)斑巖流體包裹體的研究表明,石英-輝鉬礦階段流體包裹體類型主要有氣液兩相和含CO_2三相包裹體兩種類型,前者鹽水溶液鹽度集中在6NaCI.eqv~12 NaCI.eqv間,后者鹽度較大主要集中在16%NaCI.eqv~20%NaCI.eqv,該階段包裹體均一溫度集中于260℃~360℃;石英-多金屬硫化物階段流體包裹體主要以氣液兩相為主,包裹體均一溫度集中于200℃~260℃,鹽度集中在6%NaCI.eqv~10%NaCI.eqv。成礦流體由中高溫、中-低鹽度、富CO_2的流體向中低溫、低鹽度、低CO_2流體演化。沸騰流體包裹體組合的存在暗示了成礦流體的沸騰作用,可能由于壓力急劇降低而形成。通過(guò)等容線相交法獲得沸騰包裹體組合捕獲時(shí)的壓力為84MPa~120 MPa之間,成礦深度估算為3.2km~4.5km�？傮w上,成礦流體由中高溫、中-低鹽度、富CO_2的流體向中低溫、低鹽度、低CO_2流體演化。該礦床形成于東昆侖造山帶印支晚期后碰撞環(huán)境,成礦花崗閃長(zhǎng)斑巖體主要源自下地殼的部分熔融,金屬M(fèi)o主要來(lái)源于下地殼底部,部分萃取于上部地殼,成礦流體中含CO_2組分是大陸環(huán)境含Mo巖漿系統(tǒng)的普遍特征。
[Abstract]:The Halong Xiuma molybdenum deposit is located in the eastern section of the East Kunlun orogenic belt. It is a newly discovered porphyry type molybdenum deposit in recent years and has a medium scale. The study of fluid inclusions of granodiorite porphyry related to ore-forming shows that the ore-forming rock mass is of late Triassic granodiorite fluid inclusions. The types of fluid inclusions in quartz-molybdenum stage are mainly gas-liquid two-phase and three-phase inclusions containing CO_2. The salinity of the former brine solution is concentrated in the range of 6NaCI.eqvn 12 NaCI.eqv. The latter is mainly concentrated in 16NaCI.eqvn20NaCI.eqv.The homogenization temperature of inclusions at this stage is 260 鈩，

本文編號(hào)：1577766