Abstract:The Yanshanian granite in the Sumochagan area, emplaced between Erlian haote-Hegenshan and Suolunshan_Xilamulun River deep_rooted faults, is rich in K, Al, Rb, Th and LREE, and depleted in Sr, Ti, P and Eu, belonging to the high-K calci-alkaline peraluminous granite. εNd（t）ranges from 0.77 to －4.65, t2DMranges from 869 to 1310 Ma, which is similar to things of the granite of ancient microplate in the Hingganling_Mongolian orogenic belt. The μ values of Pb isotope range from 9.2 to 9.5, with an average of 9.37. The ratios of 206Pb/204Pb range from 18.114 to 19.150, with an average of 18.658, those of 207Pb/204Pb range from 15.517 to 15.598, with an average of 15.556, those of 208Pb/204Pb range from 38.384 to 39.054, with an average of 38.614. All these data are plotted in the area between the mantle and the orogenic belt. Geochemical characteristics of the Yanshanian granite formed in a post_collision extensional tectonic envir onment indicates that the Yanshanian granite is a product of the mixture of the crust and the mantle substance. The Yanshanian granite is very closely related to fluorite and base metal mineralization in the Sumochagan area.

Abstract:The Yandang Mountain World Geopark situated in southeastern Zhejiang province is mainly a Cretaceous resurgent caldera composed of four volcanic rock sections and one central intrusive body. It has undergone four stages of eruptio, two collapses, one intrusion and the formation of modern landscape, comprising totally eight evolution phases. Volcanic rocks are of the high-K calc-alkaline series rock association, composed mainly of ryholitic and trachytic dacitic rocks, and the central intrusive body is olivine-andesite-trachytic quartz syenitic porphyrite. They have A/CNK values of 0.9～1.2, suggesting aluminum saturation or ersaturation, and are enriched in LREE and LILEs and depleted in HFSEs. Their δEu values are 0.11～0.32, evidently indicating plagioclase fractional crystallization. (87Sr/86Sr)i ratios and εNd（t）values are 0.707?9～0.716?1 and -6.90～-7.70 for volcanic rocks, and 0.7086～0.7098 and -7.10～-7.68 for quartz syenitic porphyrite, respectively, implying that all the igneous rocks from the Yandang Mountain were evolutional products of co-magmas, and derived mainly from the crust, mixed however with mantle components. The tectonic setting is an active continental margin close to the inner continent instead of a typical island arc or an Andean_type active continental margin.

Abstract:Based on a study of Mapeng rock mass in the Shihu gold deposit, this paper made a systematic determination on the petrochemical composition, trace elements and rare earth elements of the porphyritic granite, granodiorite and quartz diorite respectively. The Sio2 of rock mass averages 67.77％, slightly lower than that of Wang’anzhen quartz syerite of Zijingguan in the northeast, which belongs to the same structural magmatic belt. The total REE of Mapeng rock mass are relatively high, which range from 136.41×10-6 to 167.45×10-6. The REE distribution pattern inclines toward the right. The LREE/HREE value ranges from 12.50 to 18.75,averaging 16.07. It is characterized by obvious enrichment of light REE and depletion of heavy REE. From characteristics of petrology, trace elements and rare earth elements of Mapeng rock mass, the authors have reached the conclusion that the Mapeng rock mass is I_type granite. 

Abstract:By means of thermometry and Raman spectrum technology, this paper has studied c- haracteristics of fluid inclusions of marine lower assemblage in Qianzhong uplift area. The result indicates that the fluid inclusions are characterized by small size， colorlessness and irregular shape, whereas the nature gas is a dry gas mainly composed of CH4. Some CO-bearing inclusions were formed by carbonate ［Ca-(HCO3)2］ decomposition under the condition of temperature and pressure change. The homogenization temperature of inclusions in marine lower assemblage has two temperature ranges, which are 85～125℃ and 125～165℃，respectively. It is thus concluded that the hydrocarbon accumulation periods of this area are Early-Middle Cambrian-Early Triassic and Early Triassic-]Middle-Late Jurassic.

Abstract:During the anatexis of metapelite, the phosphorus content of initial magma is mainly controlled by the apatite contents of the source, the melting degree and the solubility of apatite in the melt. Strong depletion of Ca, ∑REE and Y in the peraluminous magma hinders the crystallization of phosphate minerals such as apatite, xenotime and monazite. The alkali feldspars crystallizing from the P-rich peraluminous magmatic system constitute the main phosphorus reservoirs. As P has strong affinity to Li, an amblygonite-montebrasite assemblage occurs t the last stage of magmatic evolution. In magmatic_hydrothermal transition stage, phosphorus is in favor of the melt and can hardly form P_rich fluid. During the hydrothermal alteration, a lot of secondary apatites were formed as the P was released by Al-Si ordering of alkali feldspar and Ca was provided by external hydrothermal fluid. Some of Sn, W, Mn and U, whose mineralizations were hosted in hydrothermal veins, were probably transported as M-P complex in P_fluid resulting from hydrothermal alteration. 

Abstract:本文以表格的形式列举了经国际矿物学协会(IMA)新矿物与矿物命名委员会(CNMMN)批准、并于2003年度正式发表的新矿物共55种,其中硅酸盐31种,磷酸盐5种,砷酸盐2种,硫酸盐4种,硫化物3种,碳酸盐2种,钒酸盐2种,硼酸盐1种,硒化物1种,硫盐1种,氧化物1种,氢氧化物1种,复杂卤化物1种.文中表格依次列出了矿物的中外文名称及化学式、晶系及晶胞参数、主要粉晶数据、物理性质、光学性质、产状及共生(伴生)组合等.

Abstract:This paper deals with the process of preparing cast stones directly from thermal phosphorous slag liquid. In the experiment, 75% solid phosphorous slag was remelted into thermal liquid, then mixed with 25% secondary raw materials, and subsequently melted together into the modified slag liquid that was cast, crystallized and annealed, thus resulting in the formation of cast stones. XRD and SEM observations confirmed that the main crystal phase of the cast stones was β-wollastonite, and the fibriform crystals assumed compactly granular form with the size of 0.2～ 0.5 μ-m. The bending strength, alkali resistance and acid resistance of the cast stone were respectively 37.17 MPa, 0.02% and 0.42%, conistent with the quality standards of construction materials. The process presented by the authors is suitable for industrial application, and the study is also a basic work of the resource recycle of thermal phosphorous slag liquid and the environment protection of phosphor industry.

Abstract:Using such means as electron microprobe analysis, ICP-MS and ICP_AES， the authors studied the tremolite jade from Luanchuan tremolite jade deposit in the western part of Henan Province. The results show that the samples are almost exclusively composed of tremolite, and are quite similar to Hetian jade in chemical composition. It is held that this tremolite jade deposit is probably a magmatic hydrothermal replacement deposit.

Abstract:Turquoise in the oxidized zone of Yuertan pyrite mine in Baihe County of Shaanxi Province has experienced severe weathering and retrograding. Its color has changed from sky-blue through yellowish green to white, with its texture from massive and smooth to loose and porous. Recent studies of typical turquoise samples by such means as thin section observation, chemical analysis and X-ray powder diffraction and infrared absorption spectroscopic analysis indicate that the factor responsible for weathering and retrograding of turquoise is the replacement of phosphate ions by sulfate ions. And the last important retrograding replacement product is woodhouseite.