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  • A new geological era initiated from blockchain's application
    ZHOU Yongzhang, LIU Nan, CHEN Chuan and YANG Wei
    Human beings have knocked on the gate of blockchain era; nevertheless, the application of blockchain is almost blank in the field of geology.Even Deep Digital Earth(DDE) and the similar ambitious scientific projects fail to realize the situation that blockchain technology can help the effective collection and utilization of "long tail data" scattered in individual scientists or laboratories.Geological science information is a superlarge shared database, which requires that many people should trust each other so as so complete the rewriting of the database.Blockchain will be a very good support technology. It provides rich interactive interfaces based on its system characteristics and smart contracts, especially it has decentralized, tamper proof and privacy protection characteristics, so that it can provide an important foundation for the application of blockchain technology in the geological field. The traceability management of objects and data from geological exploration as well as the collection of long tail data from a wide scientific community should be an important breakthrough in the geological application of blockchain. Geological certificate makes it possible to build a global geological community.
    2020  .  39(1):    1-6    [摘要](169)    [PDF](125)
  • Dating and reconstruction of protoliths of the Laojunmiao Group and its indications for basement in eastern Junggar, Xinjiang
    YANG Shuo, LIU Ge, JIN Liuyuan, ZHENG Haifeng and WANG Shengdong
    The Laojunmiao Group which is exposed on the northeastern margin of the Runggar basin consists of metamorphic complex of high greenschist facies to amphibolite facies. Its formation age and tectonic setting has been controversial for a long time. Zircon U-Pb dating of K-feldspar mylonite schist yielded a number of ages which are mostly concentrated on 500~544Ma with, a few belonging to early Neoproterozoic(740~920Ma).According to the youngest peak age(~520Ma), the age of Laojunmiao Group is redefined as early Cambrian.The lithogeochemical characteristics of Laojunmiao Group show that it has the characteristics of the continental crust, the protoliths formation is similar to a set of flysch formation and its tectonic environment should belong to the continental margin sea.As the problem in regard of the basement properties of funggar basin has not been conclusive yet, the results of this study in combination with, regional data can prove the existence of Precambrian basement in Eastern Junggar.
    2020  .  39(1):    7-17    [摘要](155)    [PDF](126)
  • Sedimentary characteristics and cobalt-rich crust resource potential of Weijia Guyot in the Western Pacific Ocean
    ZHAO Bin, Lü Wenchao, ZHANG Xiangyu, HE Gaowen, YANG Yong, WEI Zhenqun, MA Weilin and DENG Yi'nan
    Based on the subbottom profiles, DSDP drilling and related studies, the authors studied sedimentary environment, deposition history, sediment thickness and cobalt-rich crust resource potential of Weijia Guyot in the Western Pacific Ocean. The main conclusions are as follows:there are mainly three types of reflection characteristics on the top of the Weijia Guyot, which represent three sedimentary units; there are three depositional centers and four depositional rarefaction areas on the top of Weijia Guyot, and dcpositional rarefaction or basement outcrop areas have good crust metallogcnic conditions; the depositional anomaly area in the eastern center was related to the second volcanic activity during Eocene. This study has a very important guiding significance for the future exploration of cobalt-rich crust resources on the Weijia Guyot.
    2020  .  39(1):    18-26    [摘要](147)    [PDF](74)
  • Formation age, geochemical characteristics and geological significance of the Early Jurassic monzonitic granites in southern Xiao Hinggan Mountains
    YIN Zhigang, PANG Xuechang, WANG Chunsheng, HAO Ke, LIU Songjie, GONG Zhaomin, ZHANG Shengting and WANG Guanqun
    In this paper, the formation age and petrogenesis of the monzonitic granites were confirmed through LA-ICP-MS zircon U-Pb dating and geochemical analysis in southern Xiao Hinggan Mountains.It is found that the isotopic age of monzogranite is 188±2Ma, suggesting Early Jurassic. The geochemical characteristics show that Si and ALK are abundant, CaO, Fe2O3, TiO2, MnO, MgO and P2O5 are relatively poor, with A/CNK being 0.95~1.12 and A/NK being 1.17~1.32, implying aluminum-weakly peraluminous high potassium calc-alkaline series granites; They are enriched in large ion lithophile elements Rb, K and high field strength elements Hf, Zr, Th, and depleted in large ion lithophile elements Ba, Sr and high field strength elements Nb, Ta, Ti and P.The total rare earth elements (∑REE) are abundant, the distribution curve shows that the light rare earth elements are more abundant than the heavy rare earth elements and show right-inclined pattern, with weak negative Eu anomalies.The geochemical characteristics of elements indicate that the granites belong to I-type granites.Combined with regional research data, it is suggested that the Early Jurassic monzonitic granites in southern Xiao Hinggan Mountains were formed under an extensional environment similar to back-arc basin which might have been related to double-subductions of the Paleo-Pacific plate beneath the Eurasian continent and the Mongol-Okhotsk oceanic plate beneath the Ergima Massif, and the magmas originated from partial melting of lower crustal materials.
    2020  .  39(1):    27-39    [摘要](147)    [PDF](110)
  • Zircon U-Pb dating of Bolongke A-type granite on the margin of northern North China Plate and its geological significance
    LI Chunlin, WANG Zongxiu and TAO Tao
    Bolongke granite, emplaced in the Upper Jurassic volcanic strata, is located on the north margin of the North China Craton (NCC).Detailed petrographical observation reveals that the granite occurs in the forms of euhedral and subeuhedral crystals and exhibits mymekitic and pegmatitic texture and massive structure.Sencitization and argillation exist in part of plagioclases caused by weathering. The LA-ICP-MS analysis of zircons yielded empkcement ages of 134.0±1.8Ma(MSWD=1.8) and 134.9±4.1Ma(MSWD=2.0), indicating that the Bolongke granite was fomied in the Early Cretaceous.A geochemical study of the intrusion suggests that it belongs to high-K calc-alkaline series and is characterized by depletion of Ba, Sr and enrichment of such elements as Rb, Th, Pb and Hf, with obviously negative Eu anomalies. To sum up, the intrusion shows the charactejstics of A-type granite. Tectonic discrimination diagrams indicate that Bolongke granite was fomed in an anorogenic extension environment. Combined with the achievements obtained by previous researchers, the authors tentatively hold that the emplacement of Bolongke granite belonged to the Mesozoic magmatic events in the North China Craton and was produced by lithospheric thinning.
    2020  .  39(1):    40-50    [摘要](177)    [PDF](161)
  • Zircon U-Pb dating, geochemistry and tectonic implications of the Artala Middle Triassic A-type granite in Inner Mongolia
    WANG Jinfang, LI Yingjie, LI Hongyang and DONG Peipei
    The newly recognized Artala A-type granite occurs along the Erenhot-Hegenshan suture in Xi Ujimqin Banner of Inner Mongolia and is composed of monzogranite.LA-ICP-MS zircon U-Pb dating yielded a weighted average age of 242.9±1.5Ma.The age suggests that the granite was emplaced in the Middle Triassic.The granite belongs to high-K Calc-alkaline series, and is characterized by rich SiO2(75.89%~76.79%) and K2O(4.18%~4.30%),high alkali(Na2O+K2O=8.23%~8.57%),low CaO, MgO, Sr, Ba, Eu, Ti, P, and relatively high Ga, Rb and Th. In addition, it has lower total rare earth element (REE) content with obviously negative Eu anomalies(δEu=0.11~0.14), showing a typical flat gull-wing shaped REE distribution pattern.The Artala monzogranite exhibits the typical geochemical characteristics of A-type granites. According to the chemical subdivision diagrams of the A-type granitoids, the Artala A-type granite belongs to A-type granitoid, which was formed and emplaced in a post-collisional extension setting. Based on the previous studies of the time-space evolution of the ophiolites, arc granitoids, and post-collisional granitoids in the Erenhot-Hegenshan suture, the authors suggest that the Erenhot-Hegenshan oceanic basin of the Paleo-Asian Ocean was probably closed at the end of the Permian and that the Erenhot-Hegenshan suture entered the post-collisional extension tectonic evolution period in Triassic.
    2020  .  39(1):    51-61    [摘要](301)    [PDF](259)
  • LA-ICP-MS zircon U-Pb dating and genetic types of uranium-bearing granite porphyry in northern Xiangshan orefield, Jiangxi Province
    WANG Liling, ZHANG Shuming, XU Xun, ZHANG Xin, RUAN Xiaoyu, LAN Dechu, WU Zhichun and QI Jiawei
    The Xiangshan uranium orefield is the largest volcanic rock type uranium deposit so far found in China. The main uraniumore type in the north is the granite porphyry type uranium deposit.The uranium mineralization is related to the ultra-hallow intrusion-phase granite porphyry in time and space.Most of the previous work was aimed at the main rocks in a single deposit, and the age date of granite porphyry obtained were quite different, which has affected the in-depth study of Xiangshang granite porphyry uranium orefield. In this paper, the main mineral-granitic porphyry system of the uranium deposits in the northern part of Xiangshan, including Hengian, Youfang, Shazhou and Yunji, was selected to carry out field geological survey, geochemical characteristics study and LA-IXP-MS zircon U-Pb dating, with the purpose of determining the petrogenetic age and genesis type of one-bearing main rocks in Xiangshan granite porphyry uranium deposit.The weighted mean 206Pb/238U ages of granite of Hengjian, Youfang, Shazhou and Yunji are 135.6±1.3Ma (MSWD=0.45, n=26),136.2±1.3Ma(MSWD=1.2,n=21Ma(MSWD=0.67, n=24) and 134.3±1.1Ma(MSWD=0.88, n=25) respectively, concentrated on the range of 132~137Ma, suggesting the Early Cretaceous period. It is concluded that the original type of granitic porphyry in the north of Xianghan is bounded by the transition type between A-type granite and S-type granite, named A-S granite. Granite porphyry magma originated from the Middle Proterozoic crust. Crustal material, as the main component, was involved in the formation of porphyry, with the addition of a small amount of mantle materal.The granite porphyry was formed by the stretching system under the intraplate tectonic environment.It might have been the effect of magmatic intrusion due to plate retreat after the Pacific plate subduction.
    2020  .  39(1):    62-79    [摘要](136)    [PDF](68)
  • A study of the coordination theory and evaluation method of resource environment carrying capacity
    LI Ruimin, YIN Zhiiqiang, LI Xiaolei, LIU Qiong, MENG Hui, HUANG Daomao, WANG Yi, WANG Longping, WANG Xinbao, LIU Jiankui, SUN Chao and ZHAO Degang
    The evaluation of carrying capacity of resources and environment is the basis for the spatial planning of national land and usage control, and hence is receiving more and more attention from the government. On the basis of research practice in long-term carrying capacity of resources and environment, the authors chose the natural resource environment system and its relationship with the social economic system as the main research object, proposed the "resource and environment bearing coordination theory", and then initially established the evaluation techniques and methods of resource and environmental carrying capacity at different spatial scales, After that, the authors constructed the background, status and carrying capacity evaluation indicators system of geological environment, water and soil environment, groundwater resources, mineral resources, geotliermal resources, geological heritage resources and other types of geological resources and environmental. Finally, the authors further standarciized the evaluation process of resources and environmental carrying capacity at different scales. These results provide powerful technical support for the orderly promotion of geological resources and environmental carrying capacity evaluation of natural units and administrative units at national, regional and county scales.
    2020  .  39(1):    80-87    [摘要](97)    [PDF](83)
  • An analysis of coordination relationship between groundwater resources and economic carrying capacity based on hyperbolic distance coordination model
    WANG Yi, LI Ruimin, GAO Mengmeng, LIU Qiong, YIN Zhiiqiang, LI Xiaolei and YANG Nan
    Resources and environment conditions are important factors for supporting social and economic development. China's natural resources and environment conditions are very complex, regional dierences are great, and the gap of regional economic development is widening day by day.How to analyze the degree of coordination and matching between resources, environment and social economy is the first problem to be clarified in order to promote the sustainable development of regional economy.Based on the coordination theory of resource and environment carrying capacity, the authors constructed a coordination analysis model method of resource-economy system based on hyperbolic distance coordination degree.According to the model, the authors made coordinated relationship analysis of China's 514 counties which rely on groundwater resources and have developed a higher degree of groundwater resources as well as economic data, and evaluated the level of coordination between economy and the groundwater resources endowment of these counties. The results show some differences of coordination between the two systems and between the degrees of space. Most areas in Northeast and Northwest China are in the positive region of groundwater resources and economic coordination, and regional economic development still has certain potential, whereas most areas of North China and South China are in the negative coordination zone, where the economic development exceeds the carrying capacity of groundwater resources.
    2020  .  39(1):    88-93    [摘要](60)    [PDF](47)
  • A discussion on the evaluation method of geological environment carrying capacity of Hebei Province
    WANG Xinbao, LI Ruimin, SUN Chao, MENG Hui, WANG Xinzhou, CAO Yi, WANG Linying, HAN Chong and ZHAO Degang
    With the rapid economic and social development, population growth and urbanization in Hebei Province in the past decades, geological disasters such as collapse, landslides, mudslides, ground subsidence, ground fissures and land subsidence have been increasingly generated, which affects economic development of Hebei. The province's economy and society are developing well and fast.The main reason for the formation of these geological disasters is that the intensity of human activities exceeds the carrying capacity of the local geological environment.To objectively analyze the geological environment carrying capacity of Hebei Province, the authors established the evaluation index of the regional geological environment carrying capacity of Hebei Province, and carried out the geological environment carrying capacity background evaluationand status evaluation of Hebei Province. Throughthe study and analysis of the evaluation results, the authors put forward a new evaluation index and method for the geological environment carrying capacity status evaluation so as to beter conform to the actual situation of the study area, and carried out an analysis and evaluation so as to establish a multi-party coordinated resource and environmental carrying capacit monitoring and early warning long-term effect. The results obtained by the authors provide a reference for these purposes.
    2020  .  39(1):    94-101    [摘要](93)    [PDF](86)
  • The evaluation on the bearing capacity of geological environment in Anhui Province
    WEI Lu, LIU Jiankui, XIAO Yonghong, LIU Guijian and KANG Jia
    Based on an analysis of the characteristics of geological environment in Anhui Province, the authors selected eight geological environment factors to establish the evaluation index system of geological environment, calculated the weight of each environmental factor by using analytic hierarchy process, and carried out the comprehensive evaluation of the carrying capacity of geological environment.The results show that the carrying capacity of the geological environment in Anhui Province is generally strong. Only some concentrated mining areas such as the Dabie Mountain area, Huangslian City, and Chizhou City-Tongling City-Wuhu City have weak bearing capacity.These areas account for 4.78% of the whole region. According to the bearing capacity characteristics of geological environment in Anhui Province, some suggestions are put forward for carrying out geological environment protection in Dabie Mountain area and southern mountains area in Anhui and repairing the groundwater overdraft area in Anhui Province, with the purpose of providing scientific reference for the development of land space.
    2020  .  39(1):    102-107    [摘要](68)    [PDF](84)
  • Carrying capacity of mineral resources of counties based on DEA: A case study of resource-based counties in Hu'nan Province
    XIANG Guangxin, ZENG Yi, JIANG Xingxiang, LI Shenpeng and ZHANG Jianxin
    Based on an analysis of the characteristics of mineral resources supporting social and economic development, the carrying capacity of mineral resources is defined as the capability of regional mineral resources to maintain economic and social development in a certain period of time, on the premise of minimizing the loss of resources and ecological environment, leaking 20 resource-based counties (cities and districts) in Hu'nan Province as an example on the basis of DEA, the authors selected the area of destroyed land, the amount of ore mined and the amount of sewage discharged as input indicators, and mining employment and mining economy as output indicators. The research shows that the carrying capacity of mineral resources can be divided into five levels, and the main factors affecting the carrying capacity of mineral resources are the strong pollution of "three wastes" and the low treatment rate, the serious situation of occupying and destroying land resources in mineral resources exploitation, the weak mining economy and the mining structure which should be optimized. The empirical research shows that DEA model can quantitatively evaluate the carrying capacity of mineral resources and objectively reflect the short plate elements of carrying capacity of mineral resources.
    2020  .  39(1):    108-113    [摘要](60)    [PDF](51)
  • A study of evaluation of resources and environment carrying capacity of Qixingguan District in Bijie City, Wumeng Mountain, Guizhou Province
    CHEN Wu, LI Ruimin, YIN Zhiqiang, TANG Zuoqi, QIAO Wenlang, QIAO Chang, FU Yong, LIU Lingyun and MENG Hui
    Soutliwest karst area is an important eco-sensitive area in China, where the regional physical and geographical conditions are complex and the eco-geological environment is relatively fragile. The extensive mode of resource development has agravated the damage to the eco-geological environment, resulting in the relatively backward development of regional economy and society. Exploring the coordinated development of resources and environment in such an area is the only way to promote regional sustainable development. In this study, the authors chose Qixingguan District of Bijie City in a cluster of poverty-stricken areas in Wumeng Mountain as an evaluation pilot. To ascertain the status quo of regional geological resources and environment, the authors explored and constructed the evaluation index system of carrying capacity of geological resources and environment suitable for typical areas of Wumeng Mountain. Som conclusions have been reached:(1) The carrying capacity of geological resources in Qixingguan District is generally strong, but its spatial distribution is uneven.(2) The carrying capacity of the soil and water environment in this area is generally high, but the carrying capacity of the soil and water environment in Qilngga District, Yachi Town and Qingshuipu Town is low due to the existence of certain soil and water environmental pollution. (3) The carrying capacity of regional geological safety is mainly medium to strong.Zhuchang and Xiaoba areas in the suburbs of urban areas have strong carrying capacity of regional geological safety, which are favorable areas for urban planning and engineering construction. The evaluation results can provide basic geological basis for regional territorial spatial planning and delimitation of "three districts and three lines".
    2020  .  39(1):    114-123    [摘要](72)    [PDF](56)
  • A study of the environmental carrying capacity of groundwater resources in Southwest karst mountain areas: A case study of Qixingguan District of Guizhou Province
    TANG Zuoqi, LI Ruimin, QIAO Wenlang, YIN Zhiqiang, LIU Qiong, CHEN Wu and ZHAO Degang
    Exemplified by the national poverty alleviation crucial area of Qixingguan District in Wumengshan of Guizhou Province, referring to the evaluation theory and method for "national geological resources and environment carrying capacity evaluation and monitoring and early warning", and combined with the hydrogeologcal conditions of groundwater resources of the karst mountain area and the practical development and utiization situation, the authors explored the construction of water resources carrying capacity evaluation method for counties in the karst mountain area. The carrying capacity of groundwater resources in Qixingguan area was systematically evaluated, and it is concluded that the carry capacity of groundwater resources in this area is relatively large, but the uneven distribution of inferior water and resource exploitation intensity reduce the carrying capacity of groundwater resources in some places. The evaluation results provide the basis for regional land space planning and "three districts and three lines" designation.At the same time, the evaluation method also provides reference for the evaluation of carrying capacity of groundwater resources in karst areas.
    2020  .  39(1):    124-130    [摘要](68)    [PDF](52)
  • The evaluation of geo-resources and environment carrying capacity in Yixing City of Jiangsu Province
    ZHANG Li, LI Ruimin, XU Shugang, LI Zhiming, TANG Xin, GONG Yabing, LI Xiaolei, WANG Yi, LI Chunyan and ZHAO Degang
    At present, the studies of the carrying capacity of resources and environment are mostly focused on the regional scale, while the study of the county scale is relatively less. Inviewof such a situation, the authors chose Yixing City as an example, and established the system of assessment index from two aspects of carrying background and actuality, and carried out the evaluation of geo-resources and environment carrying capacity inthree aspects:geological resources, water and soi environment and geological safety. The evaluation provicies support and reference for the technical specification on the evaluation of geological resources and environmental carrying capacity at the county scale. The evaluation results show that the carrying capacity of geological resources in southern hilly and mountainous areas is higher than that in northern plain areas, while the carrying capacity of geological safety is lower than that in northern plain areas.The carrying capacity of soil and water geological environment is generally of medium level.It is suggested that the protection of resources and environmental and the prevention of geological disasters should be strengthened in southern areas of Yixing City, and that emphasis should be placed on prevention and control of water and soil pollution in central areas.The evaluation results provide a scientific basis for the rational use of geological resources and geological environment security in Yixing City.
    2020  .  39(1):    131-137    [摘要](67)    [PDF](65)
  • The method of three kinds of space division based on natural suitability of land space: A case study of Hu'nan Province
    ZENG Yi, XIANG Guangxin, JIANG Xingxiang, LI Shenpeng and ZHANG Jianxin
    In order to satisfy the requirement of space planning, the authors have constructed the prohibitive and restrictive factors of suitability evaluation of construction land and cultivated land with natural geographical condition and institutional policy. In the evaluation, firstly, the restriction of specific indicators on dierent functions such as agriculture and construction in the region is qualitatively analyzed, and the prohibitive indicators such as ecologically important or extremely sensitive areas and waters are "vetoed by one vote". Then, different index grades and weights ae set for comprehensive scoring. The prohibitive factors mens "no" for construction land and cultivated land, and the restrictive factors are limited by value(0~100, the higher the better) and the weight on the suitability. Combined with the evaluation of ecological importance and sensitivity, based on GIS technology, and comparing the suitability grades of ecology, agriculture and construction in the same plot, the authors determine the space types according to the highest level of the three. If the suitability grades ae the same, the space types are determined according to the specific resource and environment attributes of the plot and the current situation of land use, and the ecological, agricultural and construction spaces are adjusted and optimized according to the integrity of the ecosystem and the needs of agricultural modernization. Taking Hu'nan Province as an example, the authors divided the whole space into the construction with development space (20.22%), the agricultural development space(30.3%), the ecological protection space(49.48%).
    2020  .  39(1):    138-145    [摘要](70)    [PDF](64)

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