17 Result(s)
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Article
Manganese mineral prospectivity based on deep convolutional neural networks in Songtao of northeastern Guizhou
The world has moved into an era of hidden ore body exploration, necessitating the development of new prospecting and exploration methods. One promising approach is to use the deep convolutional neural network ...
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Article
Landslide susceptibility assessment in Qinzhou based on rough set and semi-supervised support vector machine
As selection of landslide-causing indicators and training samples in landslide susceptibility assessment are the key factors in determining a model’s accuracy, the purpose of this research is to improve the ac...
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Article
Open AccessEnhanced mitigation in nutrient surplus driven by multilateral crop trade patterns
Multilateral crop trade is likely to drive enhancement or mitigation of nutrient surpluses of the trading countries; however, the driving mechanisms are unclear. Here we explore the effects of multilateral cro...
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Identification and stage classification of Precambrian rifts in the Tarim craton, northwestern China
The study of Precambrian rifts, such as those found in the Tarim craton, is of great interest in the field of deep petroleum exploration as the source rocks of the rifts are depositional deep lacustrine facies...
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Article
Lipid Evidence for Oil Depletion by Sulfate-Reducing Bacteria during U Mineralization in the Dongsheng Deposit
Fatty acids were extracted from fluid inclusions, and analyzed for distribution and individual δ13C values to determine if there exists sulfate-reducing bacteria (SRB) and what substrates SRB depleted during U mi...
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Article
The Ocean redox state evolution and its controls during the Cambrian Series 1–2: Evidence from Lijiatuo Section, South China
Well-exposed Lijiatuo Section was chosen to explore the temporal evolution and controls of the oceanic redox state, primary productivity and seawater sulfate levels during the Cambrian Series 1–2, South China....
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Article
Deletion of a DnaK protein gene causes seedling green-revertible albino by retarding chloroplast development in rice
Green-revertible albino mutants are important sources for studying chloroplast structure, chloroplast development, chlorophyll biosynthesis, and plant photosynthesis. In the present study, we characterized a g...
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The role of thermochemical sulfate reduction in the genesis of high-quality deep marine reservoirs within the central Tarim Basin, western China
Deeply buried Ordovician reservoirs within the central Tarim Basin, China, contain elevated concentrations of H2S. This study uses petrography, carbon and sulfur isotopes, and fluid inclusion microthermometry dat...
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Article
Redox condition during Ediacaran–Cambrian transition in the Lower Yangtze deep water basin, South China: constraints from iron speciation and δ 13Corg in the Diben section, Zhejiang
Cherts of the Piyuancun Formation and black mudstones of the Hetang Formation in Diben Town, Kaihua County, Zhejiang were deposited in a deep water basin of the Lower Yangtze area during the Ediacaran–Cambrian...
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Article
Community replacement sequences and paleoenvironmental changes in reef areas of South China from Late Permian to Early Triassic exemplified by Panlongdong section in northeastern Sichuan Basin
The well-known Permian Changhsingian calcisponge reef located at Panlongdong section, Xuanhan county, northeastern Sichuan Basin has attracted wide attention. Due to severe dolomitization and poor quality of t...
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Article
Open AccessLipids of sulfate-reducing bacteria and sulfur-oxidizing bacteria found in the Dongsheng uranium deposit
U-bearing sandstones from the Dongsheng deposit in Ordos Basin contain abundant C15-C18 fatty acids. The fatty acids may have been derived from modern and ancient organisms including organisms from the intervals ...
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Filamentous cyanobacteria fossils and their significance in the Permian-Triassic boundary section at Laolongdong, Chongqing
The microbial communities blooming immediately after the end-Permian mass extinction represent abnormally extreme environments, and vary in different areas. In this study, filamentous cyanobacterial biota was ...
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Article
The allochthonous genesis model about the extra-thick and high-quality coalbed in **anfeng basin, Yunnan Province, China
An extra-thick high-quality brown coal was found to have accumulated in the **anfeng basin in Yunnan Province, China. There are also abundant sedimentary marks of allochthonous genesis in the extra-thick coalb...
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Article
Seismic wave propagating in Kelvin-Voigt homogeneous visco-elastic media
This paper studies, under a small disturbance, the responses of seismic transient wave in the visco-elastic media and the analytic solution of the corresponding third-order partial differential equation. A pla...
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Article
Detection of coalbed fractures with P-wave azimuthal AVO in 3-D seismic exploration
The detection of fractures is important for production and safety in coal fields. Subsurface fractures result in azimuthal anisotropy of the seismic wave, and the amplitude of reflection wave varies with offse...
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Article
Supercondcuting properties in MgB2/Fe wires prepared by PIT method
The MgB2 formation was analyzed physically and chemically and the MgB2/Fe wires were fabricated by powder in tube (PIT) technology. The microstructure of MgB2 in wires was studied by the scanning electrical micro...
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Article
Early Yanshanian post-orogenic granitoids in the Nanling region
Early Yanshanian magmatic suites predominate absolutely in the Nanling granite belt. They consist mainly of monzogranite and K-feldspar granite. There occur associations of early Yanshanian A-type granitoids (...
