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2016 Vol. 3, No. 4
Published: 2016-08-20
 
1 Application of remote sensing in integrated survey on mineral exploration in Beketan, Altyn
YI Huan, LI Jianqiang, HAN Haihui, GAO Ting, YANG Min, REN Guangli
Altyn area is a potential area of exploration for gold, copper, lead, zinc and other minerals. However, conventional geological survey is difficult in this area, because the natural environment is harsh. In the “remote sensing integrated survey on mineral exploration in Altyn Metallogenic Belt ”project, high spatial resolution and multi (high) spectral resolution remote sensing data are used to make high resolution remote sensing image map. And abnormal information about Fe3+, Al—OH, Mg—OH and CO32-, has been extracted and selected. Also remote sensing interpretations of lithology and structure have been completed in different scales. Based on field investigation and typical deposit research, remote sensing is applied to ore prediction, and two structural altered gold mineralization clues are found in Beketan, Altyn. In this paper, the mineralization mechanism of structural altered gold deposit has been summarized, and prospecting direction in this area has been pointed out.
2016 Vol. 3 (4): 1-5 [Abstract] ( 387 ) RICH HTML PDF (2070 KB)  ( 406 )
6 Geological conditions and exploration prospect of shale gas in Dawuba Formation of Lower Carboniferous of Daiye-1 well in southern Guizhou Province
LU Shufan, HE Ben, DU Shengjiang
Recent studies have shown that the black shale in Dawuba Formation of Lower Carboniferous is widely distributed in southern Guizhou Province. The formation with black shale has become an objective layer of shale gas exploration in this area. In this study, the black shale samples in Dawuba Formation of Daiye-1 well are analyzed to obtain some crucial parameters of shale gas and evaluate exploration potential. The results show that, firstly, the sedimentary environment of Dawuba Formation is mainly deep sea shelf and the thickness of black shale is 80 m;secondly, kerogen maceral is mainly sapropelinite, exinite and vitrinite. The kerogen type of Dawuba Formation is dominated by type Ⅰ to type Ⅲ. The TOC content of black shale in Dawuba Formation is 1.5%-3.3% and the Ro ranges from 2.15% to 2.66%; thirdly, quartz and clay minerals are the dominant minerals in the black shale, and the content of brittle minerals (calcites not contained) ranges from 35% to 64%; finally, the shale gas content of field measurement is between 0.49 m3/t and 4.97m3/t with the average value of 2.20 m3/t. Meanwhile, the Dawuba Formation with great thickness has good gas content, organic geochemical index and reservoir potentiality by field investigation and laboratory tests. Furthermore, the black shale of Dawuba formation has good exploration prospects, so it is significant to further investigate the basic geology, shale reservoir exploitation and shale gas regularity.
2016 Vol. 3 (4): 6-11 [Abstract] ( 419 ) RICH HTML PDF (4767 KB)  ( 479 )
12 Research on shallow geothermal energy resources occurrence rule of major cities in Guanzhong basin
ZHOU Yang, LI Feng, YAN Wenzhong, MU Genxu, LIU Jianqiang
Shallow geothermal energy with many advantages of non-polluting, renewable, widely distributed, is a clean energy in architecture and also an advanced technology, so it has broad prospects for development and utilization. According to the factors of regional engineering geology, hydrogeology and environmental geology conditions, zoning suitability evaluation system of groundwater heat pumps and ground source heat pump have been established, and a comprehensive evaluation system of the suitability district of shallow geothermal energy in every city has been built. Based on the results of the suitability assessment, this paper evaluated the shallow geothermal energy resources in the main cities, including heat capacity calculation, heat power calculation and thermal potential. This research intents to enrich the theories of development and utilization of shallow ground water and lay the foundation of exploitation and utilization of shallow ground water temperature. So it is possible to build a resource-saving and environment-friendly society, improve our existing energy structure, and promote the realization of the goal of national energy strategy.
2016 Vol. 3 (4): 12-18 [Abstract] ( 447 ) RICH HTML PDF (14984 KB)  ( 331 )
19 Division and characteristics of the Cretaceous formation in southern Yarlung-Zangbo suture zone in Tibet
ZHANG Jidong, FAN Yonggui, LIU Silin, MA Chao, LI Xian, LIAO Yunfeng, LIU Hongzhang
A large number of Radiolarian fossils were found in the southern Yarlung-Zangbo suture zone of Xiukang Group, Lake Rakshastal-Saga county, eastern Danga region through the 1∶250 000 regional geological survey. And lithostratigraphic units for seven formation from Jurassic to Eocene are disintegrated through the detailed investigation and the characteristic of Radiolarian fossils.The Cretaceous formations are defined as Zheba Formation and Sangdanlin Formation. The characteristic of Zheba Formation is mainly composed of siliceous rocks, mudstone, shale and basaltic sandstone, and Zheba Formation is a conformity between upper Jurassic Danga Formation and lower Cretaceous Sangdanlin Formation, and it is rich in Radiolarian fossils of lower Cretaceous. The characteristic of Sangdanlin Formation mainly consists of quartz sandstone, sandstone, mudstone, shale and siliceous rocks, intercalated with basalt. Sangdanlin Formation is a conformity between Zheba Formation of Early Cretaceous and Denggang Formation of Paleocene, and it is abundant in radiolarian and foraminifera fossils of Late Cretaceous. The establishment and research about the Zhaba and Sangdanlin Formations of Cretaceous can further enrich the basic information in southern Yarlung-Zangbo suture zone. It also improves our research level and provides new data for the sedimentary palaeogeographic and tectonic study in this area.
2016 Vol. 3 (4): 19-28 [Abstract] ( 329 ) RICH HTML PDF (9777 KB)  ( 95 )
29 Research on sedimentary tectonic metallogenic of Hongyanxi area in the northwest Hunan
LIANG Enyun, LIU Wei, LIU Yaorong, HUANG Leqing, LIU Gengyin, PENG Nengli, CAO Jiehua
Hongyanxi area in the northwest of Hunan is on the south central of Xiangxi-Exi polymetallic metallogenic belt and it belongs to the southeast of upper Yangtze region. The major sedimentary formations are from Cambrian to Silurian and there are many Pb-Zn deposits along Hongyanxi fracture with northeast strike. These Pb-Zn deposits are in the limestone of Tongzi Formation and Honghuayuan Formation of Ordovician period. Firstly, this paper used stratum, rock and tectonic feature to characterize stratum, rock and tectonic feature about the Pb-Zn mine, found out the metallogenic geological background and qualification, and summarized the metallogenic law. This study also analyzed the forming mechanisms of the storm deposit in Tongzi Formation, bioherm limestone in Honghuayuan Formation, crazing construction in Baota Formation and turbidities of far source in Xintan Formation. So the model of Ordovician-Silurian sedimentary tectonic evolution was built, which was from passive continental margin (extensional system) to foreland basin (compressional system). Secondly, this paper investigates the connection between fracture and Pb-Zn deposits, and found out the faults strike to northeast and north-north-east are the ore-transmission structures, and those pointing to northwest are ore-hosting structures. Also the form of metallogenic environment of Pb-Zn deposit from aspect of fluid inclusion was discussed. The results show the mineralizing hydrothemal is similar to the hot brine in the basin, which is originally coming from interlayer and meteoric water. Finally, the Pb-Zn metallogenic model was built.
2016 Vol. 3 (4): 29-36 [Abstract] ( 313 ) RICH HTML PDF (6867 KB)  ( 407 )
37 Gravity and magnetic features and its geologic significance in Zhaotong Basin of Yunnan
QU Niannian, LI Jiabin
Based on the previous geology and other research results, according to regional gravity and magnetic data, this paper analyzed the gravity and magnetic features and also processed and explained the low gravity anomaly in Zhaotong Basin. The basement structure form, strata development characteristics and fault structure distribution were revealed in detail through basement density interface inversion and profile inversion based on gravity data. And the effect of the fault and fold structure in the processing of huge thick lignite layer was analyzed in Zhaotong Basin. So it is concluded that Zhaotong Basin is a tectonic depression basin.
2016 Vol. 3 (4): 37-42 [Abstract] ( 354 ) RICH HTML PDF (2263 KB)  ( 494 )
43 Comprehensive evaluation of mine geological environment in Guangxi based on RS and GIS
LIAO Zhenwei, WANG Zhixing, HUANG Cheng, HE Weijun
This paper chose Guangxi Province as the study area and used remote sensing technology to investigate the mine geological environment and obtain the data of exploitation situation, mining activities area, geological disasters, environmental pollution and restoration and control. Firstly, fourteen factors based on geography and geology information were taken for evaluation. Then, grid method was adopted provide comprehensive evaluation of mine geological environment. Finally, the mine geological affected areas were classified into four levels: the seriously affected areas, the more severely affected areas, generally affected areas and had no effect areas. So this study can provide some ideas and technical support for environment control, relevant policies and regulations.
2016 Vol. 3 (4): 43-48 [Abstract] ( 276 ) RICH HTML PDF (7207 KB)  ( 165 )
49 Environmental geochemistry characteristics of selenium rich soil in Taipingzhuang area of Suihua city in Heilongjiang
LEI Fenghua, CUI Yujun, ZHANG Li, LIU Guodong
From the viewpoint of improving economic benefits of agriculture land, this paper investigated the distribution of selenium rich soil and geochemistry characteristics of heavy metals in the Taipingzhuang area of Suihua city by geochemistry method, and evaluated the soil quality. The results show that soil quality of the survey area is good and it is suitable for further development of selenium rich agricultural products. These products would further increase the income of local residents and government, and bring good economic benefits and social impact.
2016 Vol. 3 (4): 49-54 [Abstract] ( 365 ) RICH HTML PDF (2820 KB)  ( 349 )
55 Mineral information extraction technology by airborne hyperspectral remote sensing and its application progress: An example of mineralization belts of western China
YAN Bokun, DONG Xinfeng, WANG Zhe, YANG Suming, YU Junchuan, LI Na, GAN Fuping
In order to improve the extraction technology of mineral information from airborne hyperspectral and boost its application in geological engineering, the authors have completed several types of thematic maps based on CASI/SASI/TASI airborne hyperspectral data, including minerals species and abundance maps, as well as ore prospecting map from 2010 to 2015. All these maps were based on the mineral spectral feature analysis, hyperspectral image preprocessing, mineral information extraction, alteration anomaly information screening and regional prospecting prediction in mineralization belts of western China. A set of hyperspectral technique series was built to solve the problems of image preprocessing and minerals extraction and improve the airborne hyperspectral mapping to be more accurate and microcosmic. These investigations would help to build the foundation for hyperspectral applications in geological engineering and would be helpful to the traditional geological mapping and ore prospecting work.
2016 Vol. 3 (4): 55-62 [Abstract] ( 397 ) RICH HTML PDF (7020 KB)  ( 226 )
63 Study of land subsidence monitoring based on an improved coherent point target technology in Fuyang City
PENG Peng, YANG Honglei
This paper proposed an improved coherent point target InSAR technology. The value of the sub-look coherent was used to identify the coherent point targets of small dataset, and the trend filter was then applied to remove the large-scale residual phase. Using 10 Radarsat-2 Wide Model images over Fuyang City during 2012—2013, the high density coherent point targets were obtained and the reliability of the results were improved. The obtained land subsidence was in accordance with the previous measurement data and our field survey. This method provides the technical supports and application example for risk analysis and the regular monitoring of the land subsidence in Fuyang City.
2016 Vol. 3 (4): 63-68 [Abstract] ( 349 ) RICH HTML PDF (4012 KB)  ( 266 )
69 Application of comprehensive method to search concealed deposit in the shallow area of Hanggaiyinhundi area in Inner Mongolia
WANG Jingui, ZHANG Xinquan, LI Dian, ZHANG Xinzheng, BAI Chundong, ZHANG Zixuan, TIAN Lifu
The Hanggaiyinhundi area of Inner Mongolia is seriously covered and indistinctly prospected. The authors have summarized the previous research on the basis of comprehensive ore-prospecting information and completed some work on launched geological mapping, soil geochemical measurements, intermediate gradient in IP measurement according to the practical situation. This method helps decrease the effective cost and receives good prospecting results by drilling verification, so the objective of comprehensive prospecting was achieved. This study was based on mutual authentication system and focused on the effects and problems of the work in this research area. Finally, the geology-geochemistry-geophysics integrated prospecting models were established through comprehensive analysis of regional geology background, geological characteristics, geochemical characteristics, geophysical characteristics and source materials for mineralization, host space and ore-controlling structure and prospecting indicators.
2016 Vol. 3 (4): 69-75 [Abstract] ( 346 ) RICH HTML PDF (34926 KB)  ( 133 )
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