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2015 Vol. 2, No. 1
Published: 2015-01-01
Orignal Article
 
       Orignal Article
1 New Understanding of the Dayong-Guzhang-Jishou Fault
ZHANG Xiao-yang, ZOU Guang-jun
The regional geological and mineral survey projects of 1∶50,000 Huayuan and Guzhang have found out the deformation features of the Dayong-Guzhang-Jishou fault in northwest Hunan province, and the distribution characteristics of lithology, lithofacies and palaeocoenosis in the Early Paleozoic rock stratigraphic units at both sides of the fault. Comprehensive studies show the fault is an important boundary between the Wuling and Xuefeng blocks in the southeastern margin of Yangtze plate, and the fault, as a long-term active structure, controls the distribution of regional lithology, lithofacies and mineral resources. These new understanding are favorable to the prospecting and exploration of sedimentary manganese, lead and zinc deposits in the northwest Hunan province.
2015 Vol. 2 (1): 1-8 [Abstract] ( 391 ) RICH HTML PDF (18467 KB)  ( 1243 )
9 Advances in Study of Skarn-type Scheelite Deposit
ZHAO Xin-min, GUO Zhou-ping, BAI Yun
Skarn-type scheelite deposit is widespread and has the greatest economic value, occupies an important place among all tungsten deposits in the world, and accounts for half of the total tungten reserves in the world In China, skarn-type scheelite makes up at least 60％ of the total tungsten reserves. Therefore, study of skarn-type scheelite deposit is of great economic and strategic importance. In previous studies, some researchers have done a lot of works on skarn-type scheelite deposit and obtained a series of achievements. In this paper, on the basis of previous data, the spatial and temporal distribution, the geological and metallogenic characteristics, the ore-forming fluid and source, the metallogenic mechanism and comparison of typical deposits in domestic and abroad are discussed, and an overview of the current state in study of the skarn-type scheelite deposit is presented.
2015 Vol. 2 (1): 9-13 [Abstract] ( 457 ) RICH HTML PDF (11820 KB)  ( 308 )
14 New Progress of International Mineral Exploratory Situation and Technology in 2014——In View of Global Mineral Exploration from “China Mining Congress & Explo 2014”
Su Yi-na
The “China Mining Congress & Explo 2014” themed as “sustainable development through innovation”, was successfully held at the end of October, 2014. During the congress, domestic and overseas technical experts and associations from all areas of the mining sector deeply discussed the hottest topics of current global economic situation and mining industry trends, and the hottest topics include mineral exploration and technology innovation in 2014. With the booming of economic and social demand for mineral resources, the global mineral exploratory situation had changed and exploratory investment had grown, high technologies had been widely used as major technical method, and the states and communities have paid more attention to mineral exploration. Mineral exploration enters a new period of diversified cooperation, technical promotion and prosperous development.
2015 Vol. 2 (1): 14-17 [Abstract] ( 290 ) RICH HTML PDF (8290 KB)  ( 308 )
18 Major Progress and Achievements in Study of the Metallogenic Prospect and Prospecting Deployment of Mineral Resources in Northwest China
LI Wen-yuan, DONG Fu-chen, ZHANG Zhao-wei, TAN Wen-juan, JIANG Han-bing, XIAO Chao-yang
The most important metallogenic epochs are Proterozoic period and Paleozoic period in Northwest China which lies in the hinterland of Eurasia, and the main metallogenic types are extrusive volcanic iron deposits, banded iron formation (BIF) iron deposits, magmatic copper-nickel sulphide deposits, volcanic hosted massive sulphide copper polymetallic deposits, sedimentary exhalative lead-zinc deposits and epithermal gold deposits. The ore genesis closely relates to the large igneous provinces of Carboniferous-Early Permian in central south of Central Asian Tectonic Region, and the relevant metallogenic feature is characterized by Late Paleozoic endogenic mineralization. Both of the Tarim and Ordos basins are important oil storage basins, with some metal deposits located in their surrounding areas. Taxkorgan ore concentrating area of west Kunlun and Qimantage ore concentrating area of east Kunlun have been found in Qinling-Qilian-Kunlun orogenic belt of northeast of Tethyan tectonic domain. According to the multivariate comprehensive analysis of mineralization characteristics, typical deposits and new prospecting discoveries, we evaluated the mineral resources potential and prospecting potential, pointed out the mineral prospects and exploration areas, and put forward proposals for further work of Northwest China.
2015 Vol. 2 (1): 18-24 [Abstract] ( 329 ) RICH HTML PDF (14195 KB)  ( 351 )
25 3D Inversion System of Magnetotelluric Sounding and its Application
ZHANG Kun, HE Yu-xian, YAN Jia-yong
Magnetotelluric is a geophysics exploration method for studying the crust and upper mantle electrical structure, which measures the surface orthogonal electric and magnetic fields based on the electromagnetic induction and natural electromagnetic fields. Thereafter, the audio-frequency magnetotelluric method which collects the high frequency domain of natural field and controlled source audio-freguency magnetotelluric method which collects artificial source are derived. These methods are widely used in deep structure study, mineral resources exploration, oil and gas exploration, and so on. Though the field work achieves 3D level in recent years, 3D data processing and inversion are insufficient and the efficiency and accuracy of interpretation is limited. To solve these problems, we develop the 3D inversion system of magnetotelluric sounding which contains static shift correction, initial model design and 3D inversion. The system effectively solves the static shift of data process and 3D inversion problem. A lot of algorithms in the system are improved which have advantages on calculation accuracy, efficiency and cost savings. And the system has a good application prospect.
2015 Vol. 2 (1): 25-30 [Abstract] ( 467 ) RICH HTML PDF (14125 KB)  ( 897 )
31 Exploration Prospect of the Cambrian Niutitang Formation Shale Gas in Northwestern Hunan
LI Guo-liang, BAI Dao-yuan, WANG Xian-hui, LUO Peng, JIANG Wen, XIONG Xiong
Niutitang formation black shales are widely distributed in northwestern Hunan, which are the deposition products of reduction environment during Early Cambrian (Terreneuvian-Epoch 2), where the moderate buried depth and large thickness provide good gas reservoir conditions. Physical and chemical analysis shows the black shales are characterized by abundant organic matter (TOC: 0.59%~13.05%, average 3.75%), high maturity (Ro: 1.87%~4.00%, average 3.05%), good hydrocarbon generation potential (the kerogen is dominated by I type with minor II type), favorable reservoir reconstruction (brittle mineral content: 33%~87%, average 68%, clay mineral content:13%~43%, average 26%, and a high ratio of brittle mineral/ clay mineral), and low porosity and low permeability (porosity:0.3%~8.0%, average 3.3%, permeability less than 0.04×10-3 μm2). Comprehensive studies show that Niutitang formation has good potential for shale gas reserves, and the method of conditional probability volume was used to assess resources, which shows abundant shale gas reserves. In addition, six favorable prospecting areas for shale gas are divided in northwestern Hunan, which provides evidence for the further research of shale gas.
2015 Vol. 2 (1): 31-39 [Abstract] ( 365 ) RICH HTML PDF (23568 KB)  ( 592 )
40 Sedimentary Facies Analysis and Stratigraphic Characteristics of the 1st Member of JingXing Formation in Nanjian Area, Yunnan
ZHENG Lang,XIAO Yuan-fu,LI Hong-xiao,XIAO Rui-qing,YANG Kai-rui
This paper presented the characteristic of measured stratigraphic section of the 1st member of Jingxing Formation in Tuguan village, Gonglang town, Nanjian county, western Yunnan province, and discussed the lithostratigraphy, stratigraphic contact relations and lithofacies features. In addition, we proposed that the 1st member of Jingxing Formation which are composed of grayish white sandstone and purplish red mudstone were major in fluvial deposition.
2015 Vol. 2 (1): 40-45 [Abstract] ( 362 ) RICH HTML PDF (11439 KB)  ( 310 )
46 Thoughts and Significances in the Social Service of Geological Survey Data of South Central China
LI li, ZHANG Hai-tao, PANG Ying-chun, DU Xiao-hong
Wuhan Center of China Geological Survey, a geological data management organization in South Central China, undertakes the social service work of geological survey. In recent years, our Center has continuously innovated and explored the service thoughts and measures like geological data integration, thematic data extraction, database construction, data-publishing system development and so on. On these bases, we innovated and explored the mode of geological data integration, development and publishing, and provided various retrieval methods which changed the service mode and greatly improved the service ability. In addition, our Center carried out highly effective social service for geological data through various ways like Web publishing, window reception, electronic reading room and so on.
2015 Vol. 2 (1): 46-49 [Abstract] ( 337 ) RICH HTML PDF (8296 KB)  ( 236 )
50 Patent Situation Analysis Report of China Geological Survey (1999—2013)
WANG Xiao-li, WANG Xue-ping, DING Qun-an
Based on the patent data of CGS’28 agencies in 1990—2013, this report analyzed the achievements features from the aspects of the patent applications and grants, the main technical areas of the distribution of patent application, the type of patents, patent applications subject, the legal status of patents, patent maintenance rate and survival. Some problems were found from the achievements management of CGS' agencies and counter suggestions were offered.
2015 Vol. 2 (1): 50-54 [Abstract] ( 302 ) RICH HTML PDF (9487 KB)  ( 244 )
55 The Design and Realization of the Management System for 1∶50,000 Geological Map based on MAPGIS
ZHAO Lin-lin, LIU Rong-mei
Considering that it is difficult to manage the massive regional geological map data, we proposed a method for managing the digital construction contents by establishing the 1∶50,000 regional geological map management system. Base on the study of technologies relating to MAPGIS and computer science, we put forward a high efficient GIS application solution which has the function of data warehousing management, property code conversion, distributed data storage management, spatial query, geographic elements and content retrieval. Experiments showed the geological map management system could provide a basic platform for regional geological map data standardization management, and this had great significance to ensure the data accumulation of regional geological database construction and the application of social services.
2015 Vol. 2 (1): 55-60 [Abstract] ( 346 ) RICH HTML PDF (9645 KB)  ( 269 )
61 The Construction and Development of Geological Archives Digitalization
LIANG Qi-hua
The digitalization of geological archives is to improve the management and utilization of geological archives, and to provide readers with high-quality and high level service so that the users can refer to the contents, index and full-text information without leaving their home. The construction and development of geological archives digitization was discussed from the aspects of the construction of geological archive database platform, the blueprint for digitalized hardware and software environment, the searchable index setting and the database network permission setting. The superiority lies in four aspects. Digitalization for information management: using advanced digital storage technology solutions to achieve high versatility, safety and standardization; Resource management virtualization: achieving resource sharing by network interconnection and library to library co-construction virtual resource; Intelligent information resources management: allowing the user to search the database with hypertext and multimedia; Convenient for user application: users can obtain more timely and accurate information at any time, any place through the computer.
2015 Vol. 2 (1): 61-66 [Abstract] ( 341 ) RICH HTML PDF (7167 KB)  ( 436 )
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