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2020 Vol. 7, No. 1
Published: 2020-02-20
 
1 Progress of oil and gas investigation in the piedmont of the Bogda Mountain in Xinjiang
ZHOU Xingui, GAO Yongjin, DU Xiaodi, YANG Youxing, SUN Xiangcan, ZHANG Jinhu, WEN Lei
DOI: 10.19388/j.zgdzdc.2020.01.01
The Bogda Mountain piedmont is located in the eastern segment of the thrust belt in south margin of Jungar Basin. Key geological problems, such as complex structural deformation, vague sedimentary evolution and undefined accumulation factors, have restricted the oil and gas exploration process in this area. A series of comprehensive studies, about the field geological surveys, seismic data processing and interpretation, and source rock geochemical analysis, was conducted by the Xinjiang Project team of Oil and Gas Survey of China Geological Survey in the piedmont of the Bogda Mountain in order to clarify structural deformation patterns and evolution process. The Permian Lucaogou Formation was defined as the source rock deposition center and the oil and gas resource potential in this area was evaluated. Besides, the multiple oil and gas accumulation model was proposed. Drilling practice has further confirmed the good potential of oil and gas resources in the area, which also promoted the process of oil and gas exploration in the area. These investigations have some reference significance for oil and gas exploration in similar areas.
2020 Vol. 7 (1): 1-6 [Abstract] ( 314 ) RICH HTML PDF (6160 KB)  ( 285 )
7 Shale gas resource evaluation method and application: An example of Wufeng Formation-Longmaxi Formation in Jiaoshiba area
CAI Jin, LIU Li, JI Jing, MENG Zhiyong, LI Kai
DOI: 10.19388/j.zgdzdc.2020.01.02
In order to determine the geological resource of the upper gas reservoir of Wufeng Formation-Longmaxi Formation in Jiaoshiba block of Fuling shale gas field and evaluate the resource potential of the block, based on the high degree of exploration and the complete drilling data, the authors utilized the data of seven evaluation and horizontal wells to calculate the shale gas resource in upper gas layer of Wufeng Formation - Longmaxi Formation of the block by the static method. According to the requirement of geological industry standard Regulation of Shale Gas Resources/Reserves Estimation, the capacity method was used to calculate the geological resource of free gas, and the geological resource of absorbed gas was calculated by volume method. The authors explained emphatically the calculation method and various parameters, including the area, thickness, total porosity, free gas saturation, absorbed gas content, etc. The geological resource of the upper gas reservoir of Wufeng Formation-Longmaxi Formation in Jiaoshiba block of Fuling shale gas field was preliminary calculated. The results show that the geological resource is about 110 billion m3, and the resource abundance is about 0.4 billion m3/km2. The grade of the shale gas resources is II-class, and there is a good development potential in the study area. This method is used to calculate and evaluate the resources of the Jiaoshiba block in Fuling shale gas field. The geological resource is obtained and the effect of the block is evaluated. The application of this method has good adaptability. This research is an important basis for the study of shale gas reserves producing situation in Jiaoshiba block.
2020 Vol. 7 (1): 7-13 [Abstract] ( 348 ) RICH HTML PDF (3979 KB)  ( 294 )
14 The characteristics of geothermal resources and their development and utilization suggestions in Yancheng City
Wang Mingpeng
DOI: 10.19388/j.zgdzdc.2020.01.03
Geothermal resources are the clean source of hot mineral water. The development and utilization of geothermal resources can promote and improve the rapid development of tourism, leisure industry, modern agriculture and service industry. The geothermal resources in Yancheng City have low development degree and only utilized for a short time and in extensive and single style. The author in this paper analyzed the geological conditions and distribution of geothermal resources,the characteristics of geothermal water quality, the current situation of exploitation and utilization, the demand for tourism construction, tourism market conditions, environmental conditions and the social and economic development. The results show that the geothermal resources have the function value of tourism leisure vacation, business leisure vacation, agricultural sightseeing tourism and comprehensive development demonstration in Yancheng City. Binhai-Funing, Yancheng urban district, Yancheng Red Crowned Crane coastal wetland tourism area, Majiadang scenic area-Dazong Lake scenic spot, Dongtai and Dafeng urban district and Chinese David’s Deer Park-Forest Park in the Yellow Sea are key development zones of geothermal resources. Based on the analysis of distribution and utilization of geothermal resources, the traffic conditions, the economic conditions, and the distribution characters and the development of tourism, the author puts forward the basic pattern of modern tourism of multi development and comprehensive utilization of geothermal resources in Yancheng City, making geothermal enrichment areas and urban districts as the center, and the important scenic and tourist areas as the nodes to diffuse and radiate the surrounding areas.
2020 Vol. 7 (1): 14-22 [Abstract] ( 388 ) RICH HTML PDF (3973 KB)  ( 1258 )
23 Aeromagnetic field feature and iron ore target prospecting in deep coverage area of Qihe in Shandong Province
WANG Weiping, WU Chengping, MA Xunbiao
DOI: 10.19388/j.zgdzdc.2020.01.04
Through the 1∶50 000 helicopter aeromagnetic survey, the authors investigated the saving status and distribution characteristics of intrusive rock and skarn iron ore in deep coverage area of Qihe in Shandong Province. Based on the high precision aeromagnetic data and the geology and drill hole data, the authors studied the aeromagnetic anomaly and the fracture distribution character of magmatic rock in this area, and compiled the stratigraphic structure deduced from aeromagnetic data in Qihe of Shandong Province. According to the study of magnetic iron ore ΔT abnormal curve characteristics for different scale and burial depth in deep coverage area, aeromagnetic ΔT abnormality comparison result and the human-computer interactive inversion of aeromagnetic ΔT in important section L8040, the aeromagnetic field characters in deep coverage area were acquired and the geological and geophysical ore prospecting marks were built. Besides, the ore-forming favorable areas were also predicted. Seven iron ore prospecting areas and eight iron ore prospecting targets were determined and the amount of iron ore resources was predicted to be 150 million tons. This research has reference significance for basic geological research and deep coverage iron ore prospecting in Qihe of Shandong Province.
2020 Vol. 7 (1): 23-29 [Abstract] ( 383 ) RICH HTML PDF (7779 KB)  ( 245 )
30 Geological characteristics of Banxi antimony deposit in Taojiang County of Hunan Province
FU Shengyun, SHEN Changming
DOI: 10.19388/j.zgdzdc.2020.01.05
Banxi antimony deposit is located in the Banxi antimony metallogenic belt in Taojiang County, with long exploitation history but little investigation of reginal and deposit geology. In order to find out more this type of antimony deposits in this region, on the basis of previous data and field investigation, the authors summarized the regional geology and the deposit geological characteristics, and deeply studied the ore-controlling factors and ore-forming era. The results show that antimony deposits are mostly distributed at the junction of secondary faults and anticlines beside regional large faults, and the distribution of gold-antimony metallogenic belts is controlled by the deep faults. Orebodies are mainly formed in secondary faults of NW, NE, EW, NNW and NNE groups. The formation of regional antimony deposits began in Caledonian and reached the peak in Yanshanian. The dip end of anticline or anticline in the mining area controls the location of the deposit, while secondary folds, faults, interlayer fracture zones and dip ends in the anticline control the ore body. Orebodies mainly occurred in Lengjiaxi Group of Precambrian and low-grade metamorphic rock series of Banxi Group, also in clastic and carbonate rocks of Nanhua-Silurian and Devonian-Carboniferous. The wall rock alteration mainly includes arsenopyrite, pyritization, silicification, sericitization, chloritization and carbonatization. Natural type of ore has quartz -stibnite ore, pyrite-quartz-stibnite ore and arsenopyrite-pyrite-quartz-stibnite ore, carbonate-quartz-stibnite ore. The metallogenic epoch of the deposit belongs to Yanshan period. These results will provide reference and guidance for the further ore prospecting of antimony deposits in Banxi area.
2020 Vol. 7 (1): 30-37 [Abstract] ( 355 ) RICH HTML PDF (5878 KB)  ( 238 )
38 Geochemical characteristics and geological implication of adamellite in Yazigou area of Qimantag, Qinghai Province
WANG Panxi, WANG Zhenning
DOI: 10.19388/j.zgdzdc.2020.01.06
The metal deposits, related to acid-intermediate magmatic intrusive activities, have been discovered in Qimantag area, and the area has become the most important and favorable prospecting Fe-Cu-Pb-Zn multimetallic metallogenic belt. Through the petrography and rock geochemistry study of adamellite in Yazigou area, the authors discussed its petrogenesis, tectonic setting and relation with mineralization. The results show that Yazigou adamellite has the typical features of high silicic, potassium and alkali contents and low aluminium, calcium, magnesium and iron contents, and the rocks belong to weakly peraluminous and high-kalium calc-alkaline rock series. The average value of ∑REE is 181.24×10-6 and the values of δEu are 0.07~0.11,with the average value of 0.09, indicating a remarkable Eu depletion. The rare earth patterns of rocks/chondrite show slightly right-dipping V-type curves, and light and heavy rare earth fractionation is not obvious. The rocks are significantly enriched in large ion lithophile elements of Rb, K, and active incompatible elements of U, Th , Pb, while high field strength elements of Nb, Ta, P,Ti, and large ion lithophile elements of Ba and Sr are relatively depleted. The adamellite of Yazigou region belongs to A2-type granite, which was formed in post-collision stage of collisional orogenic setting. This area has many porphyry-type copper molybdenum and skarn-type lead-zinc ore occurrences, so the prospecting work should be emphasized in adamellite of Late Triassic epoch.
2020 Vol. 7 (1): 38-46 [Abstract] ( 339 ) RICH HTML PDF (5711 KB)  ( 355 )
47 LA-ICP-MS zircon U-Pb ages and geological significance of the meta-intermediate-acidic volcanic rocks in Mangui area of Da Hinggan Mountains
LI Zhonghui, LI Ruijie, LI Yang, SHA Huanyu
DOI: 10.19388/j.zgdzdc.2020.01.07
Through the zircon U-Pb isotopes chronology research of the meta-intermediate-acidic volcanic rocks of Neoproterozoic-Lower Cambrian Dawangzi Formation in Mangui area of Da Hinggan Mountains, the authors explored the forming age and geological significance of the rocks. Dawangzi Formation is composed of meta-andesite, meta-dacite, rhyolite and a small amount of meta-crystalline tuff, and lacks interbeds of sedimentary rocks such as slate, metasandstone and schist. The authors determined the zircon U-Pb isotopes age of the meta-andesite, and the zircon 206Pb/238U weighted mean age is (199±1) Ma, indicating that the forming age of Dawangzi Formation meta-intermediate-acidic volcanic rocks is the early stage of Early Jurassic, not Neoproterozoic-Early Cambrian as in previous research. Early Jurassic volcanic rocks distributed in Erguna Block provide a provenance for Mohe Basin. Erguna Block was in the volcano-magmatic arc tectonic background in Early Jurassic. This research supplies new data for the geodynamics study during the closure of Mongolia-Okhotsk Ocean.
2020 Vol. 7 (1): 47-52 [Abstract] ( 374 ) RICH HTML PDF (4944 KB)  ( 208 )
53 LA-ICP-MS zircon U-Pb ages and geochemical characteristics of Sangejing gabbro in Beishan area of Inner Mongolia
CHEN Haidong, GAO Yong, HE Guoqiang, QIU Jinxiong, LU Ning
DOI: 10.19388/j.zgdzdc.2020.01.08
Beishan area, located in the central segment of the southern margin of Central Asian Orogenic Belt, has undergone intense magma activities. In order to ascertain the tectonic evolution in Beishan area, the authors carried out the research of geochronology and geochemistry for Sangejing gabbro of Beishan area. The results show that the LA-ICP-MS zircon U-Pb age of the gabbro is (404.9 ± 1.6) Ma, and the formation age is Early Devonian. The geochemical characteristics show that the gabbro has high Al2O3 content(18.99% ~ 21.12%, above 17%) and belongs to high-alumina basaltic rock. There is evident fractionation between LREE and HREE, and (La/Yb)N value is 7.16 ~ 9.07. The large ion lithophile elements (e.g., Rb, Ba, K, Sr) are enriched and the high field strength elements (e.g., Ta, Nb, P) are depleted. The above characteristics indicate that the formation of Sangejing gabbro is related with the subduction belt. Combined with the regional geological features, the authors thought that Sangejing gabbro could be the products of the early arc magmatism and formed during the main ocean basin southward subduction in Hongshishan area.
2020 Vol. 7 (1): 53-59 [Abstract] ( 355 ) RICH HTML PDF (4927 KB)  ( 163 )
60 Main progress and achievements of marine geological survey in Hainan Province
TONG Changliang, SUN Longfei, HUANG Shirui
DOI: 10.19388/j.zgdzdc.2020.01.09
Hainan Province has made great progress in marine geological survey with the cooperation of the central and local governments. In order to further improve the effects of marine geological work in Hainan Province, the authors have reviewed the main progress of marine geological survey carried out in recent years, including four parts of marine geological survey, coastal zone survey, marine sand survey and island survey. 1∶1,000,000 scale marine geological survey has covered the whole South China Sea, and 3 sheets of 1∶250,000 marine geological survey have been carried out. The coastal zone and bay geological surveys have been carried out, and the general geological situation in less than 20 m depth coastal sea around Hainan Island has been identified. The survey scale of key coastal sections could reach 1∶50,000, and the geological resources and environmental conditions of the coastal zone have been systematically combed out. The investigation of marine sand resources mainly aims at zirconium-titanium sand ore and marine sand resources for construction, and the sediment types and distribution of marine sand potential in the shelf area around Hainan Island have been preliminarily identified. The areas with good deposit conditions have been investigated in detail, and a number of areas for development of marine sand resource have been found out. The offshore islands research mainly focused on the basic geological conditions, and based on current development and utilization status, some suggestions were put forward. A comprehensive land and sea geological survey of the Xisha Islands has been systematically carried out for the first time, a large number of basic geological data with a large scale have been obtained, and the formation and evolution process of these islands has been studied to provide reference for the island construction. Through geological work, plenty of basic marine geological data in Hainan Province have been obtained, and the marine resources and environment condition have been identified, which provides reliable geological support for the marine economic development of Hainan Province.
2020 Vol. 7 (1): 60-70 [Abstract] ( 362 ) RICH HTML PDF (8855 KB)  ( 243 )
71 Characteristics and prevention of geological hazards in Xuzhou City
TANG Zhigang, YAN Shimin, CAI Chenggang, WANG Hongpei
DOI: 10.19388/j.zgdzdc.2020.01.10
The main types of geological hazards in Xuzhou City are rockfall, ground collapse and ground subsidence, due to the exploitation of mineral resource and groundwater for a long time. In order to find out the characteristics, developing trend and threat degree of geological disasters in Xuzhou City, and provide better guidance for the prevention and control of geological disasters, based on city geological survey and mine geological environment survey in Xuzhou City, the authors summarized the types of various geological hazards, through referring to the investigation and prevention work of geological hazards in Xuzhou City in recent years. The formation mechanism and temporal distribution of various geological hazards in Xuzhou City were also investigated. The developing trend of various geological hazards were predicted based on the geological environment conditions, and the corresponding prevention measures were put forward. At present, the prevention and control work of geological hazards in Xuzhou City has achieved certain results, which can provide some reference for the prevention work of geological hazards in other regions.
2020 Vol. 7 (1): 71-77 [Abstract] ( 374 ) RICH HTML PDF (3293 KB)  ( 503 )
78 Functional division of groundwater in Tianshi Town and its surrounding areas in Shaanxi Province
SONG Yaya, ZHANG Peidong, ZHANG Hangbo, KANG Hua, SHI Wei, HOU Juan
DOI: 10.19388/j.zgdzdc.2020.01.11
In order to achieve reasonable exploitation, scientific management and effective protection of groundwater in Tianshi Town and its surrounding areas in Shaanxi Province, based on the technical outline for the division of national groundwater function zones, the authors established the index system of groundwater function division, combing with the distribution characteristics of groundwater resources, the hydrogeological condition, the current situation of the groundwater development and utilization and demands for ecological and environmental protection in the region. The comprehensive exponential model and MapGIS technology were adopted. The groundwater function in the study area was classified as suitable mining area, moderate mining area and no-mining area. The research results can provide scientific basis for formulating and implementing the protection scheme of groundwater system and exploiting groundwater reasonably in Tianshi Town and its surrounding areas.
2020 Vol. 7 (1): 78-84 [Abstract] ( 346 ) RICH HTML PDF (3204 KB)  ( 227 )
85 Analysis on optimizing layout of mineral resources development in Qimantag metal ore concentration area of Qinghai Province
MA Yameng, TAN Xiumin, ZHAO Hengqin, ZHANG Yongxing, YI Yuejun
DOI: 10.19388/j.zgdzdc.2020.01.12
Qimantag metal ore concentration area of Qinghai Province has rich mineral resources and broad metallogenic prospect and it is the most important iron polymetallic metallogenic prospective area in East Kunlun metallogenic belt. In order to promote the sustainable development and exploitation of mineral resources, the authors established the evaluation index system of mineral resource development layout from three aspects of mineral resources conditions, technical and economic conditions, and environmental impact. The system was constructed by means of evaluation index selection, index weight and evaluation criteria determination, and evaluation index calculation. Then, the mineral resource development layout in Qimantag metal ore concentration area was evaluated. The results of evaluation analysis show that the average value of the comprehensive evaluation of the eleven development units is 7.0, and the overall development advantages of the ore concentration area are general. There are two development units with a comprehensive evaluation value above 8.0 belonging to the key priority deployment and development areas, namely Xirihamu polymetallic mining area and Hutouya-Yingqinggou polymetallic mining area. Besides, seven development units are considered as alternative areas and two development units, with comprehensive evaluation value lower than 6.0, are not suitable for development at present.
2020 Vol. 7 (1): 85-90 [Abstract] ( 366 ) RICH HTML PDF (3748 KB)  ( 319 )
91 Analysis on thermal conductivity of typical geomorphological units in Shaanxi Province based on superposition method
ZHANG Le, ZHOU Yang, LIU Jianqiang, JIN Guang, ZHANG Yage
DOI: 10.19388/j.zgdzdc.2020.01.13
In recent years, shallow geothermal energy has received extensive attention, but the failure rate of existing projects is high due to insufficient analysis of the thermal conductivity of the strata during the development and utilization process. In order to solve this problem, the authors collated 46 sets of thermal response test results that have been carried out in different geomorphological units in Shaanxi Province. Based on the linear heat source model, the thermal conductivity of typical geomorphological units in Shaanxi Province was analyzed by superposition method. The results show that the thermal conductivity of three geomorphological units(mountain basin, desert plateau and fault basin) decreases gradually. In the same geomorphological unit, the thicker the loess cover of Quaternary, the worse the thermal conductivity of the borehole. The difference of thermal conductivity in loess tableland is quite large, and the influencing factors of thermal conductivity in the geomorphological unit can be further studied. Based on the study of the distribution characteristics of thermal conductivity in different geomorphological units, some suggestions for the development and utilization of shallow geothermal energy in different regions were put forward, thus providing some ideas and technical supports for further efficient and high-quality development of shallow geothermal energy.
2020 Vol. 7 (1): 91-96 [Abstract] ( 302 ) RICH HTML PDF (2505 KB)  ( 303 )
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