TL;DR: In this article, the authors used geochemical data acquired from the GMGS3 and GMGS4 gas hydrate drilling expeditions conducted by the Guangzhou Marine Geological Survey (GMGS) to explore the origin of hydrate gases and their relationship to deep hydrocarbon reservoirs, and to evaluate the contribution of different genetic types of gases to the formation and accumulation of gas hydrates in the Shenhu area of the northern part of the South China Sea (SCS).

TL;DR: In this paper, the authors reconstruct the landscape evolution of the Tian Shan region and analyze the relations between the planation surfaces preserved within the eastern Tarim Basin and the sedimentary record.

TL;DR: In this article, the authors present in situ zircon U-Pb ages as well as whole-rock elemental and Sm-Nd isotopic compositions for late Archean sanukitoids of the Bundelkhand Craton, India.

TL;DR: In this paper, the Chang 7 source rocks in the Ordos Basin have been studied and shown to possess an excellent source rock potential, and the shales hold a better potential than the mudstones.

TL;DR: In this article, the authors reported new results from systematic field work as well as new geochronological, petrological, geochemical, and zircon Lu-Hf isotope analyses of granite and contemporaneous mafic microgranular enclaves (MMEs) from the Nyemo region in southern Tibet.

TL;DR: In this paper, the effects of mantle metasomatism by sediment-and hydrous mantle melts are investigated in a 2-layer reaction experiment, which leads to formation of a strongly K-enriched phlogopite-pyroxenite layer sandwiched between the two starting materials.

TL;DR: In this article, the authors investigated the active fault characteristics derived from local earthquake data combined with a digital elevation model, and determined the focal mechanism of earthquakes, based on the first polarity picks.

TL;DR: In this paper, the authors present rarely reported early Paleoproterozoic granitoids from the southwestern Yangtze Block, with integrated studies of zircon U-Pb ages, Lu-Hf isotopic compositions and whole-rock geochemistry.

TL;DR: In this paper, the authors describe the structural characteristics and tectonic evolution of the Yangsan Fault, which transects mainly Mesozoic-Cenozoic sedimentary and igneous rocks, and infer that four main movement phases have occurred on the fault: (1) Late Cretaceous sinistral slip faulting with a component of extensional deformation, under a regime of NW-SE compression, which occurred under a regional NE-SW compressional regime; (2) late Paleogene intense dextral slip fracture regime, during NNW

TL;DR: In this paper, the authors investigated the alteration of reservoir wettability induced by authigenic minerals and the impacts on oil accumulation in tight sandstone reservoirs using a suite of mineralogical and geochemical characterization techniques, including thin section observation, SEM-EDS, XRD, QEMSEM, CL, quantitative grain fluorescence (QGF), fluorescence spectral analysis, contact angle measurement and sealed coring oil saturation testing on the fourth member of the Lower Cretaceous Quantou Formation (K1q4) in the southern Songliao Basin, China.

TL;DR: In this article, the influence of train vibration on the tensile strength behavior of loess was investigated using a modified horizontal extensograph, and the results indicated that vibration reduces the tension-resistance and ductility of Loess soil structure.

TL;DR: In this paper, a comprehensive study of zircon U-Pb-Hf isotopes and whole-rock geochemistry on the Neoproterozoic gabbro-diorites, biotite granites, and K-feldspar granites in the southwestern margin of the Yangtze Block, South China is presented.

TL;DR: In this paper, the pyrite framboids in the Chang 7 Member of the Upper Triassic Yanchang Formation are characterized by large mean diameters (9.7-16.6μm) with a wide distribution range that plots in the area indicative of dysoxic to oxic paleoredox conditions during deposition.

TL;DR: In this paper, the sedimentary characteristics and forming mechanism of fine-grained sediments in the Permian Lucaogou Formation within the Jimsar Sag were investigated based on core and thin section observation, SEM combined with XRD and geochemical data.

TL;DR: In this article, the apatite fission track (AFT) ages for six detrital samples are reported to resolve the exhumation history of the upper reaches of the Heihe River, draining North Qilian Shan and Tuole Shan.

TL;DR: In this paper, new magnetotelluric (MT) images were obtained along two profiles across the Xiaojiang strike-slip fault system (XJFS), one of the most tectonically active areas in southwest China.

TL;DR: In this paper, integrated paleocurrent orientation, gravel component, sandstone modal composition and detrital zircon U-Pb isotopic analyses were applied to trace the source area and reconstruct the source-to-sink relations between the Alxa Massif and Ordos Basin.

TL;DR: In this paper, the authors proposed the geologic significance of the economic sweet spots in shale systems by overlapping geologic, engineering and economic sweet-spaces, and evaluated the distribution of economic and technical sweet spots.

TL;DR: In this article, the tuffaceous rocks in the Banxi area were analyzed with regard to their whole-rock major and trace-element concentrations, and zircons in the tufaceous rocks were analyzed for LA-(MC)-ICPMS U-Pb ages, trace elements and Hf isotopic compositions.

TL;DR: In this paper, the Yulong porphyry Cu-Mo ore district in eastern Tibet features a series of Eocene felsic porphyries intrusions, only one of which is intensively mineralized.

TL;DR: In this article, the deformation features and failure mechanism of a homogeneous loess slope and a double paleosol-interlayer loess slopes under different excavation slope angles were analyzed and compared.

TL;DR: Zhang et al. as discussed by the authors analyzed the characterization of the tight oil in Ordos Basin, Songliao Basin, Bohai Bay Basin, Junggar Basin, and Qaidam Basin, within the Mesozoic and Cenozoic formations.

TL;DR: Partial melting of the garnet-bearing biotite gneiss from the Jianggalesayi area in the southern Altyn Tagh high pressure (HP) -UHP metamorphic belt has been identified and reported in this article.

TL;DR: In this paper, the authors present new geochronological and petrochemical data for Early Cretaceous magmatic rocks of the Gaoligong Orogen, and conclude that the diorites, granodiorites and granites are similar to rocks found within the BNS.

TL;DR: In this article, a series of Late Mesozoic A-type granitoids, including the Xiangshan volcanic-intrusive complex, was recently identified along the Gan-Hang volcanic belt, which was close to the boundary of the Yangtze and Cathaysia blocks in South China.

TL;DR: In this article, a biostratigraphic study in the Atbashi Range of southern Kyrgyzstan indicates that sedimentary strata unconformably overlie the HP-LT metamorphic rocks within the Turkestan suture zone and have a late Kasimovian (ca. 305) age.

TL;DR: In this article, the authors present detailed geochemical compositions of the clay components of the sediments in the Huaitoutala section (ca. 15.3 to 12.6 Ma) of the northeastern Qaidam Basin to reconstruct the chemical weathering history of the catchment since the Middle Miocene.

TL;DR: In this paper, a case from a typical agricultural town in the Weihe watershed, northwest (NW) of China, Dali, which has been severely affected from earth fissures in recent years was reported.

TL;DR: In this paper, the authors conclude that the Ordovician-Devonian granitic rocks in southeast China formed during the period from 452 to 381 million years ago, yielding an age peak at around 450-430 million years.