Advanced Materials Research Vols. 807-809

Abstract: Compared with conventional reservoir, shale reservoir has distinctive characteristics such as ultra-low porosity and permeability, rich in organic matter and special ways of shale gas occurrence. These make remarkable differences between the evaluation of shale reservoir and conventional reservoir. To make an authentic assessment study on inorganic pore in shale, this article evaluated the inorganic pore of Niutitang shale in Qiannan depression with the helping of SEM, thin section and so on. Results of the study suggested that in Niutitang shale formation there mainly developed three kinds of inorganic pores, including floc interparticle pore, micro-channel and micro-fracture. Besides, all the inorganic pore diameters there were less than 5μm, most distributed in 0.25μm-1.0μm and its inorganic porosity values range from 1.71% to 3.86%, the average value was 2.67%.

Abstract: Southeast Yunnan Area is an Important Nonferrous Metals Mineral Resources Base in Yunnan Province, with Good Metallogenic Conditions. the Structure Characteristics of Kai Yuan Da Zhuang Mining Area is more Complex, with Favorable Conditions for Mineralization. Based on Detailed Geological Investigation, Combined with the Geochemical Data and Geological Setting, Deposit Features of Da Zhuang Antimony Ore Deposit and Summarizes Geochemical Characteristics, that is to Study the Genesis of this Deposit and is to Predict the Mining Ore.

Abstract: In outcrops, a fault often appears to be a geologic body with some volume which is called as a fault zone. In the geologic modeling, a fault is often characterized as a surface which cannot characterize the inner structures of the fault zone and the physical differences led by different clast fillings in the fault zone. So, a new method of fault zone modeling was applied in Weizhou oilfield, the proposed method was as follows: First, the two boundaries of a fault zone were characterized as two surfaces, and the distance between the two surfaces was decided by the extent of the fault zone, and the area between the two boundary surfaces was the fault zone. Second, fault zone could be divided into several parts which would characterize its inner structures and properties. When the fault zone is characterized as a geologic body, its inner structures and properties such as its closure can be characterized, which can provide a geologic model that is closer to the actual for the post numerical reservoir simulation.

Abstract: Pangjiagou-xiajinbaogou Au-Ag polymetallic ore in Hebei Chengde magmatic activity is very strong, mainly Late Jurassic - Early Cretaceous of granite and Late Yanshanian alteration of acidic rocks, archean metamorphic rocks and Middle Proterozoic strata containing mainly gold seam. Studies show that the area is insignificant on main rock resistivity, and all kinds of mineral body, mineralized rocks Fs> 2.4%, gneiss containing high gold abundance, gold body, auriferous quartz veins are greater than 2.4% Fs,can be used as an indirect sign on geophysical prospecting. Sb, As, Pb, Ag, Au and other elements of the exception can be used as indirect signs on geochemical prospecting. After considering this area geophysical, geochemical characteristics analysis of, binding studies geological conditions, prospecting method using the analogy prediction target region, the success of the orebody found.

Abstract: Luziyuan lead-zinc deposit located in Fengwei, Zhenkang,Yunnan Province, at the direction of 140°, horizontal distance is about 10km. The deposit closely related to acidic magmatism and geological structure. According to the latest exploration results of Yunnan Geological Survey, the amount of lead-zinc resources is 280 million tons, it is super-mega deposit. Mineralization factors as tectonics, deep fault, concealed rock, ore formation and surface north-east trending fault zone control the formation of the deposit. Gravity abnormal, magnetic abnormal, geochemical abnormal and associated mineralization of the mine relate to prospecting potential.

Abstract: Results of advanced tectonic interpretation show that the growth structures in the Chaochang area mainly include the basin basement growth faults, the cap formation growth faults and the reversal anticline. In order to exactly explain the evolution history of the tectonics, a numerical modeling study was done for a selected tectonic profile by using the TSM software. The modeling researches include recovering denudation thickness, decompaction correction and faults elimination correction. Results show that the study area principally experienced faulted period, fault-depressed diversionary period, depression period and reverse period. Comprehensive study of the tectonic interpretation, the recovery of tectonic evolution sections and the quantitative analysis of extension parameters, indicates that Chaochang area developed the upper and lower fault systems that were bounded by Denglouku Formation by the extension stress.

Abstract: JiuDingshan copper-molybdenum polymetallic mine located in the "Sanjiang" metallogenic belt Southern Section, is typical of copper molybdenum deposit related to porphyry activities. Mining area is located in Erhai - honghe fault and Chenghai - binchuan fracture clamping of the triangle,Lijiang-heqing porphyry Cu-Mo-Au mineralization zone and the alkali rich porphyry clusters, the tectonic background of mining area is complicated at the same time, strong tectonic activities, has the very good ore-forming geological conditions and great prospecting potential.

Abstract: High-Alumina clay ore is the protective exploitation of mineral stipulated by the Ministry of Land and Resources. Due to its physicochemical properties and ore characteristics are quite different from current ore types --refractory clay mineral. It is usually taken as a general refractory clay mine of high-Alumina clay in practical applications, which leads to massive misuse and great waste of high-Alumina clay ore. This paper will redefine the attribuation of high-Alumina clay ore by analysing its differences and similarities with refractory clay minerals and bauxite mines in mineralogy, rock chemistry as well as physical structure, and present some advice on its comprehensive usage aiming at the existed problems in comprehensive development and utilization.

Abstract: The concentration of fourteen environmentally important trace elements (Be, V, Cr, Co, Ni, Cu, Zn, Mo, Sn, Ba, Tl, Pb, Th and U) was studied in thirteen coal samples from Xinan coalfield, Henan province. In addition, virtrinite reflectance analysis, proximate analysis and elemental analysis were also conducted on these samples. The vitrinite reflectance values (Ro) ranges from 2% to 2.35%, revealing that these samples are lean coal. The coals have low moisture content, with M_ad value ranging from 0.57 to 0.95%. The ash and volatile matter content vary between 8.11-22.61% and 10.36-14.64%, respectively. Carbon, hydrogen, sulphur and nitrogen content vary between 71.51-83.54%, 3.068-3.879%, 0.494-2.326% and 0.953-1.38%, respectively. In comparison with the crustal average (Clarke value), some potentially hazardous elements are moderately enriched in the coals from Xinan coalfield, such as Pb, Th, U, Sn and Mo. The average concentration of most of the elements in Xinan coalfield coals is in the range of Chinese coals and world coals. No elements with the abnormally high concentrations analyzed are found.

Abstract: Boli coal basin has abundant coal resources and its structure shows southward protruding arcuate structure. There is difference about basement in western and eastern, so it can be further divided into continental craton basement in west and continental craton edge active zone basement in east. For this reason, the coal-bearing strata at the west is stable and its structure is relatively simple. On the contrary the eastern coal-bearing strata is less, poor-quality and thickness is unstable. There are two groups of faults and four folds that mainly control coal-bearing strata distribution. It can be divided into six coal-controlled structural styles in Boli coal basin based on system analysis and summarized about geological exploration data.