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Geosciences Journal
Papers 1224
1 page of 123 pages (1,224 results)
Published in Geosciences Journal 1.49
X. Lana20
Estimated H-index: 20
(UPC: Polytechnic University of Catalonia),
Dolors Martínez (UPC: Polytechnic University of Catalonia)+ -3 AuthorsAmir Hosseini (UPC: Polytechnic University of Catalonia)
Distances between consecutive aftershocks are analysed by means of mono- and multifractal theory with the aim of quantifying the complexity of the physical mechanism governing them, as well as their predictability and predictive instability. Hausdorff, Ha, and Hurst, H, exponents are determined by semivariograms and rescaled analysis, respectively. The exponent β of the power law describing power spectral contents is also quantified. These three parameters permit a generation of fractional Gauss...
Published in Geosciences Journal 1.49
Yuxiang Zhang2
Estimated H-index: 2
(CAS: Chinese Academy of Sciences),
Zhigang Zeng10
Estimated H-index: 10
(CAS: Chinese Academy of Sciences)
+ -3 AuthorsXuebo Yin11
Estimated H-index: 11
(CAS: Chinese Academy of Sciences)
The origin of the felsic volcanic rocks in the Okinawa Trough (OT) remains uncertain. In the middle Okinawa Trough (MOT), two types of rhyolites (type 1 and type 2 rhyolites) have been recognized. Research on the diverse volcanic rocks should be prioritized to determine the magmatic origins of these rocks. Consequently, in this article, the geochemical differences and controlling factors for these two types of MOT rhyolites are systematically discussed. Type 2 rhyolites have higher Dy/Yb and Nb/...
Published in Geosciences Journal 1.49
Min Sub Sim (SNU: Seoul National University)
Dissimilatory reduction of sulfate to sulfide produces a wide range of sulfur isotope effects, enriching heavy isotopes of sulfur in the remaining sulfate. This isotope fractionation is known to decrease at low sulfate concentrations, which has been used to assess marine sulfate levels throughout the geologic record. So far, the relationships of fractionations to the sulfate concentrations have been examined exclusively in continuous cultures or cell suspensions with continuous removal of the me...
Published on Dec 29, 2018in Geosciences Journal 1.49
Cailian Hao1
Estimated H-index: 1
Weihua Xiao + 1 AuthorsYing Wang
This research aimed to evaluate the phosphorus balances at field level in black Soil Region in northeast China, which is one of three black soil regions in world and is one of the most important agricultural production regions in China. By using the soil nutrient balance method, the phosphorus balances were calculated for 11 fields representing four tillage practices [Conventional tillage system (TCT), No-tillage with straw covered system (TNT), Reduced tillage system (TRT) and Contour tillage s...
Published on Dec 29, 2018in Geosciences Journal 1.49
Rodolfo Pérez-Espinosa (UNAM: National Autonomous University of Mexico), Kailasa Pandarinath13
Estimated H-index: 13
(UNAM: National Autonomous University of Mexico),
Francisco Javier Hernández-Campos
CCWater is a computer program developed for the application of extensively being used triangular diagrams for chemical classification and for identification of equilibrium conditions of waters. The program for these diagrams were developed as a Microsoft Excel™ spreadsheet application and compiled using Visual Basic™ 6.0, which has enabled to execute an Excel™ file from a program created by Visual Basic™ 6.0. The performances of all the four diagrams were validated by applying for the same chemi...
Published on Nov 27, 2018in Geosciences Journal 1.49
Byung-Hee Choi6
Estimated H-index: 6
Youn-Kyou Lee8
Estimated H-index: 8
(Kunsan National University)
+ 2 AuthorsChan Park3
Estimated H-index: 3
A tensile test using a half ring (HR) shaped specimen is attempted for the determination of the tensile strength of rock materials. The HR test is a 3-point bend test similar to the semicircular bend (SCB) test. However, the HR specimen is a curved prismatic bar. The theoretical tensile strength of this special bar can be obtained by an analytical formula derived from a basic theory of strength of materials. Owing to the eccentricity of the HR specimen, the possibility for a single tensile fract...
Published on Dec 29, 2018in Geosciences Journal 1.49
Huiying Cui3
Estimated H-index: 3
(CNPC: China National Petroleum Corporation),
Feng Liang4
Estimated H-index: 4
(CUMT: China University of Mining and Technology)
+ 3 AuthorsWei Ma1
Estimated H-index: 1
(CNPC: China National Petroleum Corporation)
Although there are many similarities between the shale of Cambrian Qiongzhusi Formation and Ordovician Wufeng Formation–Silurian Longmaxi Formation in South China, including total organic carbon content (TOC) and thickness, the drilling results of shale gas exploration are very different. One of the reasons is the difference of the nano-pores number developed in organic matter between them. In order to reveal the causes, the black shale of Upper Proterozoic Xiamaling Formation in North China, wh...
Published on Dec 4, 2018in Geosciences Journal 1.49
Juwan Jeon1
Estimated H-index: 1
(Andong National University),
Qijian Li (CAS: Chinese Academy of Sciences)+ 2 AuthorsDong Jin Lee13
Estimated H-index: 13
(Andong National University)
A new species of the most primitive rosenellid stromatoporoid Cystostroma, C. primordia sp. nov. is reported from the Hunghuayuan Formation (Lower Ordovician, Floian) of Guizhou Province in the South China Block and the Duwibong Formation (Middle Ordovician, Darriwilian) of the Taebaeksan Basin in mid-eastern Korea (North China Block). This species is the first representative of the genus found in both the North and South China blocks. Cystostroma primordia sp. nov. is characterized by the absen...
Published on Dec 4, 2018in Geosciences Journal 1.49
Mohamedharoon A. Shaikh1
Estimated H-index: 1
(MSU: Maharaja Sayajirao University of Baroda),
D. M. Maurya12
Estimated H-index: 12
(MSU: Maharaja Sayajirao University of Baroda)
+ 2 AuthorsL. S. Chamyal10
Estimated H-index: 10
(MSU: Maharaja Sayajirao University of Baroda)
The Kachchh palaeo-rift graben at the western continental margin of India is currently undergoing active coseismic deformation in response to the periodic release of NE-SW oriented compressive stresses along the E-W trending intra-basinal faults. The seismically active Kachchh Mainland Fault (KMF) is the largest intra-basinal fault that is characterized by a narrow zone comprising a chain of domes and anticlines forming the rugged hilly topography of the Northern Hill Range (NHR) in the upthrown...
Published on Mar 29, 2019in Geosciences Journal 1.49
Tianguo Wang , Chaowen Huang1
Estimated H-index: 1
+ 3 AuthorsHuan Li10
Estimated H-index: 10
Magmatism in the Huili area (SW margin of the Yangtze block) was active during the early Mesoproterozoic, and has important implications on the early tectonic evolution of the Yangtze block. We report new data in petrology, whole-rock geochemistry, zircon U-Pb and Hf isotopes for the Yaopengzi dolerite in the Huili area. LA-ICP-MS zircon U-Pb dating of the dolerite yielded an early Mesoproterozoic age of ca. 1515–1513 Ma, coeval with the Columbia supercontinent breakup. The dolerite belongs to t...