用真空烧爆、水浸取法测定了白云鄂博铁矿主、东矿的萤石、赤铁矿、磁铁矿、钠辉石、白云石等矿物的包裹体成分（钾、钠、钙、镁、氟、氯、-24SO、和ΣCO2及pH）。成分数据的聚类分析表明，氧化铁矿物一部分与沉积成因的白云岩有关，而另一部分与热液交代产物（萤石、钠辉石）有关。300℃和5x107Pa时，酸性Na-F-Cl溶液在“静态-动态”交替条件下与赤铁矿-白云岩反应的结果是形成萤石-赤铁矿-钠（铁）硅酸盐组合。流动反应有利于交代作用的进行和铁在热液中运移。

本文于300℃，500bar时，用金袋式热液设备测定了MH（磁铁矿+赤铁矿）缓冲组合在HCl水溶液中的溶解度。计算了热水溶液中离子的活度，并用岭回归和叠代的方法处理实验数据，与多种可能的Fe存在形式模型拟合。结果表明，实验溶液中的Fe主要成FeOH+存在。求得MH组合溶解反应的平衡常数K=57.161。计算了0f,FeOH+ΔG＝260.3kJ/mol。300℃时，在地质上可能的pH和氯化物浓度条件下，热液中的Fe主要成羟络合物存在。

In order to verify the presence of residual organic matter in some S-type granites, a method used conventionally in petroleum geochemistry for isolation of kerogen was employed to separate carbonaceous material (CM) from the Xihuashan granite, Jiangxi Prov., China. Optical, XRD and SEM/EDAX analyses identified the acid-insoluble residue as mainly composed of various mineral debris, with a minor carbonaceous fraction found in the residue. LMR and micro-FTIR studies showed that the residue contained a small amount of CM, which is heterogeneous in composition and structural state. The occurrence of CM in the granite implies that this granitic magma originated from sediments and crystallized at relatively lower temperatures and high pressures. This deduction is consistent with geological and geochemical studies of the Xihuashan granite. A tentative model was suggested which connects CM in S-type granite with organic matter in sedimentary rocks. The conditions under which CM can be preserved in S-type granite are discussed. The occurrence of some heavy hydrocarbons is expected in the Xihuashan granite.

The Xihuashan, Dangping and Piaotang deposits in the Jiangxi Province, south China can be considered as typical high-temperature hydrothermal quartz vein-type W-Sn mineralization, that is temporally and spatially related to Mesozoic S-type granite. Microthermometric studies of fluid inclusions in various minerals from these deposits were conducted to obtain homogenization temperature and salinity data. Major organic and inorganic aqueous components of the fluid inclusions were extracted by a crush-leaching, and concentrations of short-chain carboxylate (formate, acetate, propionate, oxalate), fluoride, chloride and sulfate anions in the leachates were determined using ion chromatography. The results indicate the presence of formate and acetate as well as minor amounts of oxalate and propionate in leachates, and the dominance of formate over other carboxylates. The molar ratio of acetate to formate appears to be a potential indicator of the redox state for the ore fluid system. Oxygen and hydrogen isotopic data show that inclusion water in quartz is mainly magmatic in origin. It is postulated that the dissolved carboxylate anions in the ore fluids for the deposits probably were generated by the breakdown of kerogen in "primitive sedimentary rocks" during the formation of S-type granites. The possibility of inorganic synthesis of the carboxylate species in a C-H-O system can not be excluded.

为了研究金在黄铁矿表面沉淀的机理，于室温、常压，在氯化物溶液中进行了黄铁矿粉末吸附金的实验。在不同pH 的溶液中，黄铁矿均可吸附金，而且pH 值明显地影响吸附速率。扫描电镜观察表明，反应后黄铁矿粒表面有金晶体形成。XPS研究得知，黄铁矿光片与含金氯化物溶液反应后表面有Auo存在；硫在反应初期为S0、2-2 3 O S，随后转变为- 24SO，而铁成为Fe3+。黄铁矿中的Fe2+和-22S是溶液中金的还原剂。金在黄铁矿表面沉淀可能涉及吸附、还原和晶体生长等过程。