The fluid inclusions and H-O-S isotopes of ore-stage quartz and sulfide are studied in order to determine the genetic type and geological characteristics of tungsten polymetallic deposit of Dawangshan in the central Jiangxi Province. Combined with field orebody shape, the study area can be divided into three stages of mineralization, there were some ore pockets in early mineralization stage, no obvious alteration phenomenon with the surrounding rock, the main mineralization stage is the large veins, the surrounding rock occurred greisenization, in the late stage, there were ore minerals in quartz geodes. The results of fluid inclusion petrography and microthermometry showed that the quartz mainly contain gas-liquid inclusions, vapor-rich inclusions, CO2three phase inclusion and gas-liquid-solid three-phase inclusion; The homogenization temperature of fluid inclusions is 180 ℃ ～280 ℃（peak is 190 ℃ ～210 ℃）, salinity is 7.86% ～20.22% NaCleqv （peak is 11% ～17% NaCleqv ）, belonging to the moderate temperature, and moderate-high salinity deposit; The δDV-SMOW values of quartz inclusions is -93.1‰～-72.5‰, the δ18OH2O values is 0.9‰～3.4‰, as can be seen from the temperature-salinity graph of quartz inclusions, ore-forming fluid was mixed with fluid phase of low temperature and low salinity; The δ34S values of sulfide range from -1.3‰ to +1.9‰, shows that sulfur mainly derived from deep magma sources. Combined with previous researches, the crystallization time of wolframite is earlier than quartz’s, and the ore-forming fluids is magmatic water, but mixed with meteoric water. The W-Mo polymetallic ore capsule, aplite veins and pegmatite veins were found in the ore-hosting alkali feldspar granite, and the metallogenic time is consistented with the diagenetic time. By synthetic analysis, the tungsten polymetallic of Dawangshan have good affinity to surrounding rock of alkali feldspar granite, and the magma-liquid immiscibility is a major cause of precipitation of W-Mo polymetallic ore.
Yang Qingkun Xuan Puyan Zhang Xiaoliang Zhou Wanpeng Qu Hongjian. Immiscibility and mineralization of Dawangshan tungsten polymetallic deposit, central Jiangxi Province[J]. Chinese Journal of Geology, 2017, 52(4): 1282-1296.