Advanced Materials Research Vols. 1073-1076

Abstract: Landsat imagery of TM, ETM+ and L8 were taken as data source and the partial least-squares regression was conducted to investigate the response of dynamics of Ross Ice Shelf and Ronne-Flchner Ice Shelf belonging to rift-opening calving dominant ice shelves to the natural environmental factors. The results show that, these two ice shelves have been extending to the ocean at nearly uniform speed along each coastline. The factors influence the dynamics of ice shelves via affecting the glacier movement. Surface air temperature and surface wind velocity facilitate the extension of ice shelves. Sea surface temperature, near-surface current velocity and atmospheric precipitable water are negatively correlated with the areal changes of ice shelves along each coastline. Salinity of the ocean is influenced by the ice shelves, and is positively correlated to the areal changes.

Abstract: In order to discuss the effect of tectonic stress on the structural evolution of coal, given the importance attached to High-resolution Transmission Electron Microscopy and micro-FTIR analysis, we investigated several aspects of material structures of high-rank Carboniferous period coal, located in the northern foreland basin of the Dabie orogenic belt in eastern China. High powered crystal lattice images of Bright Fields (BF) and Selected Area Diffraction patterns (SAD) of different types of metamorphism in coal were obtained. The organic molecular characters of different metamorphism types coal and the effecting factors are studied. The results show that:(1) the Basic Structural Units (BSU) become increasingly more compact as a function of rising temperature and pressure. Under pressure, the local orientation of molecules is strengthened, the arrangement of BSU speeds up and the degree of order is clearly enhanced; (2) tectonic stress is in favor of the chemistry environment transfer of hydrogen in coal, resulting in the decrease of aliphatic hydrocarbon and the increase of aromatic hydrocarbon in content, and accelerating the polycondensation and ordering of large molecules texture of coal.

Abstract: In this paper 1:10 000 high-precision magnetic survey work has been done using GSM-19T proton magnetometer in Halaganlawusu area. There were data processing including gridding, filtering, reduction to the pole, continuation, derivation, and so on. By precise interpretation and inference with magnetic anomaly, the distribution characteristics of basic rock mass was found out. According to the magnetic survey data and geological research, fitting-inversion of measured magnetic section P1, P2 were done. It preliminarily concluded the distribution characteristics of underground ore rock mass and achieved the effect of the geophysical prospecting.

Abstract: Simulation experiments on biogenic coalbed methane were conducted under an anaerobic condition provided by an anaerobic glove chamber and using parent anaerobic methanogen. These experiments aimed to analyze the isotope fractionation behavior of secondary biogenic coalbed methane generated from the lignite samples collected from Zhaotong Basin, Yunnan Province, China. Results showed that the δ¹³C₁ values of the simulated biomethane varied from −52.31‰ to −58.41‰, which were in the normal distribution range compared with those of biogenic methane. Given the organic maceral in the parent rock, the methanogen used, and the biological generation pathway of CH4, δ¹³C₁ values continued to decrease as the simulation experiment proceeded. The carbon isotope ratio transferred from raw coals to biogenic methane in the simulation, indicating the significant relationship of source material inheritance. The fractional degree of δ¹³C₁ was probably controlled by the organic maceral component in coal, which was manifested by the positive correlation between δ¹³C₁ and humic matter content, as well as the negative correlation between δ¹³C₁ and inertinite content.

Abstract: Oil and natural gas are very important. As reservoir geological phenomena have characteristics of complexity and nonlinearity, this paper presented a new approach of case-based reasoning with GIS to oil-gas reservoir comprehensive mapping, to which the characteristics of geological phenomena and the spatial relations among them are much considered, the reasoning is based on the attribute similarity reasoning and the spatial similarity reasoning. Experiments to the east region adjacent to Sulige gas field in north China were carried out. The results show that this approach is effective and much efficient, and it may have certain universality to similar problems or phenomena.

Abstract: Geza island arc located in the southwest Sanjiang tectonic igneous rock belts which was a products of Ganzi-Litang oceanic crust diving to Zhongdian Landmasses in late Triassic. Lithogeochemical characteristics shown that the porphyry(porphyrite) and island-arc granite rocks have the same rock series (high-K calc-alkaline) and the same genetic type (I-type granite); these rocks trace elements similar to the granite of island arc,which enriched in Ba, La, Hf, Au,chalcophile elements Cu,Pb, siderophile elements Mo, Ni, and depleted in Rb, Nb, P, Ti. In this region, the similarities of porphyry and local acidic volcanic rocks in the main elements, REE and other trace elements and the composition suggest that they both have the same or similar magmatic source rocks. It is shown that the characteristics of the rock with the island arc granite partial melting of source rock, that may come from the arc type volcano rock or island arc volcano rock cognate magma evolution.

Abstract: Fracture effectiveness, extension and connectivity from borehole surface into deep formation are the key factors to control producibility of volcanic formations. A systematic and integrated fracture delineation approach was set up which integrated available measurements with multi-scale depth of investigation to cover borehole surface, near wellbore and deep formation. High resolution micro-resistivity image was used to identify fractures on the borehole surface; shear anisotropy enhanced by dispersion analysis was used to evaluate fractures away from the borehole; Borehole acoustic reflection survey technique was applied in vertical wells to assess probable fracture networks deep into formation up to maximal 10 meters. This multi-scale approach had been implemented in multiple wells drilled in volcanic formations in Junggar basin, which helped a lot on fracture evaluation and productivity estimation.

Abstract: The control action of palaeogeomorphology to sedimentation is a hotspot of research in recent years, especially in the analysis of oil and gas basin. This paper is based on the history and present of palaeogeomorphology research and summarizes the recovery method of palaeogeomorphology. In the work of recover palaeogeomorphology, recovery of denuded thickness is one of the most important steps. Principles and the applicability of each method are analyzed, such as depositional rate, vitrinite reflectance and so on.

Abstract: Based on well logging and seismic calibration, the approximate paleo-level method was used to recreate the palaeotopography before deposition of Yageliemu stage, and then the study area was subdivided into three geomorphic units, high uplift, slope and depression. The braided river delta, oxidized shallow water delta, bank-bars as well as lacustrine sedimentary systems were identified through cores, mineralogy and logging data. Via debris composition, heavy mineral, seismic property studies, the lateral distribution of sedimentary systems were identified. This research revealed that the source to sink systems in study area are obviously controlled by topography, and there are two source districts, uplift and south-east, and braided river delta sediments developed in both the south and north sides of the eroded paleo-unplift. The southeastern source lack sediments supply, therefore only small oxidized shallow delta developed.

Abstract: In the era of big data, new information technologies introduced into the study of mining exploration to realize the wisdom prospecting has important significance. Based on 3S technology, 3D modeling and visualization technology, database technology and virtual reality technology, this paper studied the 3D integrated digital mine construction of big data era and presented a new concept of 3D visualization and data management integration modeling of digital mine. A case study of eastern Gejiu Sn-Cu deposit in Yunnan province of China achieved the integrated modeling of ground and underground, and also the multi-information integration and analysis of geology, geography, 2D and 3D. An integrated management platform was built in the application to integrate a variety of mine data organically, which provided support for mine production management, the deep prospecting practice and the comprehensive study and application of geological big data of mine.