Coordinated Exploration Model and its Application to Coal and Coal-associated Deposits in Coal Basins of China     

WANG Tong  SUN Jie  LIN Zhongyue  FANG Huiming  WANG Yue  LIU Yifen 《《地质学报》英文版》2021,95(4):1346-1356

China is a top world producer of coal resources with numerous coal-rich basins country-wide that also contain coalbed methane(CBM), an unconventional natural gas resource. Recent exploration of coal and CBM resources has also led to the discovery of rare, precious, and scattered metal minerals, including sandstone-type U and Ga–Ge–Li. High-grade and industrial-value deposits have been discovered in the Ordos, Junggar, and other basins across China during exploration for coal resources. Application of coordinated exploration theories and techniques in multiple energy and coal-associated ore deposits, such as coal and unconventional natural gas in coal, achieves efficient and practical exploration of natural resources. Based on the systematic study of accumulation and occurrence of coal and coal-associated mineral resources in coal basins, the basic idea of coordinated exploration for coal and coal-associated deposits is proposed, and multi-targets and multi-methods based on a coordinated exploration model of coal-associated deposits is developed. Coordinated exploration expands the main exploration objective from coal seams to coal-associated series, extending the exploration target from targeting coal only to coal-associated deposits. Entrance times for exploration are decreased to realize coordinated exploration for coal, unconventional natural gas and syngenetic/associated mineral resources in coal by implementing a 'one-time approach' ―one time in and out of a coal seam to minimize disturbance and time needed for extraction. According to the differences of geological background in China's coal basins, four coordinated exploration model types, including co-exploration of coal and coal-associated unconventional natural gas, coal and solid minerals, coal and metal minerals, and coal with water resources are established. Other models discussed include a multi-target coordinated exploration model for the combination of coal, coal-associated gas, solid minerals, and metal minerals accordingly. The exploration techniques of coal and coal-associated resources include regional geological investigation and research and synthetic application of other techniques including seismic surveys, drilling, logging, and geochemical exploration. Particularly, applying the 'multi-purpose drill hole' or reworking coalfield drill holes into parameter wells, adding sample testing and logging wells, determining gas-bearing layers by logging and gas content measurement, jointly measuring multiple logging parameters, sampling, and testing of coal-strata help in the exploration and evaluation of coal resources, coal-associated unconventional natural gas resources, and coal-associated element minerals. Accordingly, a system of integrated Space–Air–Ground exploration techniques for coordinated exploration of coal and coal-associated minerals is established. This includes high-resolution, hyperspectral remote-sensing technique, high-precision geophysical exploration and fast, precise drilling, testing of experimental samples, as well as coordinated exploration and determination methods of multi-target factors, multi-exploration means, multi-parameter configuration and optimization, big data fusions and interpretation techniques. In recent years, the application of this integrated system has brought significant breakthroughs in coal exploration in Inner Mongolia, Xinjiang and other provinces, discovering several large, ten-billionton coalfields, such as the Eastern Junggar and Tuha basins, and also in exploration and development of CBM from lowrank coals in Fukang, Xinjiang, discovery the Daying U Deposit in Inner Mongolia, the Junggar Ultralarge Ga Deposit, Lincang, Yunnan, and the Wulantuga, Inner Mongolia, Ge-bearing coal deposits, and the Pingshuo Ultralarge Li–Ge Deposit.  相似文献   

New Data of Macrofossils in the Ediacaran Wenghui Biota from Guizhou, South China     

WANG Ye  WANG Yue  DU Wei  WANG Xunlian 《《地质学报》英文版》2016,90(5):1611-1628

The abundance and diversity of macrofossils in the Ediacaran have attracted much attention. The upper Doushantuo macrobiotas in South China, including the Miaohe biota from Hubei and the Wenghui biota from Guizhou, are mainly preserved as the carbonaceous compressions and dominated by macroscopic algae and metazoans. Here, we describe 10 genera and 10 species (including 6 new genera and species) of macrofossils from the Wenghui biota. At present, the Wenghui biota yields macrofossils in more than 31 genera and 33 species, excluding those given no image and established on a few unascertained specimens. Based on the occurrence and distribution of macrofossils in both Miaohe and Wenghui areas, the middle-late Ediacaran (back shales of the upper Doushantuo Formation) in South China can be subdivided into two assemblage biozones in biostratigraphy: (i) the Protoconites–Linbotulitaenia–Eoandromeda–Anomalophton assemblage biozone characterized by abundant and diverse macrofossils and by the ranges of Protoconites, Linbotulitaenia and Anomalophton; and (ii) the Baculiphyca–Gesinella–Cucullus–Beltanelliformis assemblage biozone characterized by the acme of the longer macrofossils Baculiphyca and Gesinella, and by few shorter and discoidal macrofossils.  相似文献   

Molecular Organic Geochemical Characteristics and Coal Gas Potential Evaluation of Mesozoic Coal Seams in the Western Great Khingan Mountains     

QU Yue  SHAN Xuanlong  DU Tiantian  DU Xianli  ZHAO Rongsheng 《《地质学报》英文版》2020,94(2):409-417

Coal-bearing strata are widespread in the western Great Khingan Mountains. Abundant coal resources have been found in the Jurassic Alatanheli Groups, the Cretaceous Bayanhua Groups, the Damoguaihe Formation and the Yimin Formation. The organic geochemical characteristics were analyzed in combination with hydrocarbon source rock evaluation and molecular organic geochemistry experiments, and the coal gas potential of coal seams was evaluated. The source rock evaluation results indicated that the Mesozoic coal samples have the characteristics of high organic matter abundance(TOC>30%), low maturity(Ro values of approximately 0.6%), and type Ⅲ composition. The hydrocarbon generation potentials of the Alatanheli Groups and Bayanhua Groups are high, while the generation potentials of the Damoguaihe Formation and the Yimin Formation are low. The results of geochemistry show that the depositional environment of the coal seam was a lacustrine, oxidizing environment with a low salinity, and the source of the organic matter was mainly higher plants. Affected by weak degradation, the coal seams mainly formed low-maturity gas of thermal catalytic origin. The Cretaceous coal seams contain a large amount of phytoplankton groups deposited in a low-stability environment affected by a transgression event, and the potential range varied widely. For the Jurassic coal seams, the depositional environment was more stable, and the coal seams feature a higher coal-forming gas potential.  相似文献   

Arc-trench System of the Paleo-Tethys Ocean: Inferred from Ophiolite in the Southern Lancangjiang Belt, SW China     

ZHAI Qingguo  TANG Yue  HU Peiyuan  JIN Xiaochi  WANG Jun  WANG Haitao 《《地质学报》英文版》2020,94(Z1):79-79

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Pre-Cryogenian integrative stratigraphy,biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas     

Peiyuan HU  Qingguo ZHAI  Guochun ZHAO  Peter A.CAWOOD  Yue TANG  Yiming LIU 《中国科学:地球科学(英文版)》2024,(4):899-918

The composition and geological evolution of pre-Cryogenian material in the Tibetan Plateau and its surrounding areas have played an important role in studying the formation and evolution of early supercontinents on Earth. This paper systematically summarizes the characteristics of pre-Cryogenian sedimentation, paleontology, magmatism, and metamorphism in the Tibetan Plateau and its surrounding areas. Based on existing data, the records of pre-Cryogenian sedimentation and paleontology are mainly ...  相似文献   

A New Ichnogenus Kailidiscus Produced by Attachment from the Middle Cambrian Kaili Formation in Taijiang, Guizhou Province, China   总被引：1，自引：0，他引：1  

WANG Yue 《《地质学报》英文版》2006,80(1):27-37

Over 190 specimens of an attachment ichnofossil Kailidiscus （n. ichnogen.） have been found in the Kaili Bitoa, a Burgess Shale-type biota, from the middle Kaili Formation （early Middle Cambrian） in Taijiang County, Guizhou Province, southern China. Kailidiscus is an epichnia with a circular to oval attachment platform, on which there is a carbonaceous film probably formed by the body of the living organism. Structures such as a marginal furrow, an inner and outer marginal ride, many convex fold-ridges, and a large caved peripheral furrow on the attachment platform may be the result of basal tissues of a sessile organism that wrinkled to increase the attachment＇s surface area. The Kailidiscus organism may have been a sessile cnidarian attached to the muddy seafioor. Kailidiscus organisms lived in relatively quiet water, and were buried by a sudden influx of sediment.  相似文献   

Resolution-dependent subsonic non-thermal line dispersion revealed by ALMA     

Nan-Nan Yue  Di Li  Qi-Zhou Zhang  Lei Zhu  Jonathan Henshaw  Diego Mardones  Zhi-Yuan Ren 《天文和天体物理学研究(英文版)》2021,(1)

We report here Atacama Large Millimeter/submillimeter Array(ALMA)N2H+(1-0)images of the Orion Molecular Cloud 2 and 3(OMC-2/3)with high angular resolution(3"or 1200 au)and high spatial dynamic range.Combining a dataset from the ALMA main array,Atacama Compact Array(ACA),Nobeyama 45-m Telescope and Very Large Array(VLA)(providing temperature measurement on matching scales),we find that most of the dense gas in OMC-2/3 is subsonic(σQNT/cs=0.62)with a mean line width(△v)of 0.39 kms-1 full width at half maximum(FWHM).This is markedly different from the majority of previous observations of massive star-forming regions.In contrast,line widths from the Nobeyama Telescope are transonic at 0.69 km s-1(σNT/cs=1.08).We demonstrated that the larger line widths obtained by the single-dish telescope arose from unresolved sub-structures within their respective beams.The dispersions from larger scalesσls(as traced by the Nobeyama Telescope)can be decomposed into three components such thatσls2=σss2+σbm2+σrd2,where small-scaleσss is the line dispersion of each ALMA beam,bulk motionσbm is dispersion between peak velocity of each ALMA beam andσrd is the residual dispersion.Such decomposition,though purely empirical,appears to be robust throughout our data cubes.Apparent supersonic line widths,commonly found in massive molecular clouds,are thus likely due to the effect of poor spatial resolution.The observed non-thermal line dispersion(sometimes referred to as’turbulence’)transits from supersonic to subsonic at~0.05 pc scales in the OMC-2/3 region.Such transition could be commonly found with sufficient spatial(not just angular)resolution,even in regions with massive young clusters,such as the Orion molecular clouds studied here.  相似文献   

Infall in massive clumps harboring bright infrared sources     

Ying-Hua Yue  Sheng-Li Qin  Tie Liu  Meng-Yao Tang  Yuefang Wu  Ke Wang  Chao Zhang 《天文和天体物理学研究(英文版)》2021,(1)

Thirty massive clumps associated with bright infrared sources were observed to detect the infall signatures and characterize infall properties in the envelope of the massive clumps by APEX telescope in CO(4-3)and C17O(3-2)lines.Eighteen objects exhibit a"blue profile"in the CO(4-3)line with virial parameters less than 2,suggesting that global collapse is taking place in these massive clumps.The CO(4-3)lines were fitted via the two-layer model in order to obtain infall velocities and mass infall rates.Derived mass infall rates range from 10-3 to 10-1 M☉yr*(-1).A positive relationship between clump mass and infall rate appears to indicate that gravity plays a dominant role in the collapsing process.Higher luminosity clumps have a larger mass infall rate,implying that those clumps with higher mass infall rates possess a higher star formation rate.  相似文献   

A Review of Seismicity in 2017     

Jiang Xianghu  Wang Yue  Han Yanyan  Xue Yan  Yang Wen  Zang Yang  Deng Shiguang  Ma Yawei  Yao Qi  Song Jin  Shi Haixi  Zhang Xiaotao  Meng Lingyuan  Zhou Longquan 《中国地震研究》2018,32(1):141-149

正1 SURVEY OF GLOBAL SEISMICITY A total of 8 strong earthquakes with M_S≥7.0 occurred in 2017(from January 1 to December31,2017)throughout the world,according to the China Seismic Network,including one with M_S≥8.0,i.e.,the great earthquake with M_S8.2 which occurred on September 8,2017 in  相似文献   

Spatiotemporal Differences and Classification Regulation of Urbanization Impact on Agricultural Development in Shrinking Areas: A Case Study of 15 Shrinking Cities in Three Provinces of Northeast China     

CHEN Xiaohong  LIU Haihan  AN Yongle  DAI Yue  PAN Wei  WANG Ying  TANG We 《中国地理科学(英文版)》2023,(6):1053-1067

Studying the impact of urbanization on agricultural development in shrinking areas is important for maintaining food security and promoted agricultural development in China. Based on the measurement results of the shrinking cities in the three provinces of Northeast China, this paper selects 15 shrinking cities as the research object, and constructs a multi-dimensional index system to explore the impact of the urbanization level of the shrinking areas on the agricultural development in the regio...  相似文献