Showing papers in "Journal of Asian Earth Sciences in 2020"

TL;DR: In this article, the origin of enriched signatures in mafic igneous rocks above subduction zones is investigated, showing that the mass balance in major and trace elements between source and product indicates that subducting crustal rocks were not directly incorporated into the mantle sources of both series.

TL;DR: In this paper, the authors proposed the concept of unconventional petroleum sedimentology and its research task, method, aim and importance are preliminarily discussed, and their research task and method is investigated.

TL;DR: In this article, the authors proposed that the formation of Mesozoic granitoids and volcanic rocks in SE China was related to multiple stages of subduction and rollback of oceanic slab on the southeast margin of the South China Block.

TL;DR: In this article, the authors synthesize the geologic, geochemical, geochronological and stratigraphical dataset and propose an integrated geodynamic model to illustrate the tectonic evolution of the East Kunlun orogen.

TL;DR: In this paper, the authors analyzed the eight months preceding the 7.5 earthquake in Indonesia and found that there was a seismic acceleration that started two months before the mainshock.

TL;DR: In this paper, the authors analyzed the porosity of Ordovician Wufeng and Silurian Longmaxi groups in the Sichuan Basin by using the field emission-scanning electron microscopy, helium pycnometry, and low-pressure gas adsorption experiments.

TL;DR: The evolution of Indochina and adjacent areas can be divided into six mega-episodes: 1) The Neoproterozoic-Early Cambrian mega-episode was characterized by shallow marine environment in the Sino-Vietnam composite terrane as mentioned in this paper.

TL;DR: In this article, a set of new geochronological, elemental and Sr-Nd isotopic data for the late Paleozoic mafic rocks in the Nan and Luang Prabang tectonic zones were presented.

TL;DR: In this paper, an integrated study of whole-rock geochemistry, LA ICP-MS zircon U-Pb geochronology, and Zircon Hf isotopic geochemistry of the YGX granitic intrusion was undertaken to constrain its magmatic source and petrogenesis.

TL;DR: In this article, a knowledge-based seismic acoustic impedance inversion method which employs rule-based method for porosity estimation is presented. But the method is not suitable for geologically complex structures and is not able to provide precise and comprehensive model of the subsurface structures when dealing with insufficient data.

TL;DR: In this paper, low-temperature thermochronology data from the Great Xing'an Range (GXR) was used to reconstruct the detailed thermal history of the Mesozoic-Cenozoic tectonics of Northeastern China.

TL;DR: In this article, the authors have reported significant concentrations of rare earth elements (REEs) in different geological formations and mineral resources, such as Pulmoddai and other beach placer deposits, Eppawala carbonatite, alluvial placer and pegmatites.

TL;DR: In this paper, the Mesozoic Ordos Basin was reconstructed via integrated approaches including stratigraphic correlation, sedimentary facies analysis, provenance analysis, and fission track analysis.

TL;DR: Based on a compilation of published radiometric dating datasets, an updated chronostratigraphic framework was proposed for the Junggar Basin this paper, which constrains the ages of two main petroleum source intervals, the Fengcheng Formation and the Lucaogou and equivalent formations, as Early Permian and Middle permian, respectively.

TL;DR: In this article, the authors present oxygen isotope values of carbonates (δ18Ocarb) and carbon isotope value of long-chain n-alkanes ( δ13Calk) from a continuous geological section in the Qaidam Basin, northwestern China.

TL;DR: In this paper, the authors re-examined the crustal and uppermost mantle shear velocity structure under Northeast China using the broadband ambient seismic noise data from several temporary and permanent arrays in this region.

TL;DR: This article showed that strong monsoons are associated with intensified reworking of pre-existing floodplain sediments over millennial timescales and that over longer time periods (>106 y) strengthening of the monsoon is linked to faster bedrock erosion and increased sediment flux of the ocean.

TL;DR: The North China Craton (NCC) is one of the oldest cratons in the world, and has undergone six major tectono-metallogenic cycles as mentioned in this paper.

TL;DR: Based on the latest two-dimensional and three-dimensional seismic exploration data, regional geological background, and previous research results, the attributes and timing of this structural belt of the NW margin as well as the basin type related to it are clarified in this article.

TL;DR: In this paper, an end-member mixing and Gibbs model is used to study the evolution of groundwater hydrochemistry based on the 74 water samples in Thailand and Bangladesh, and the evolution path of groundwater in Bangkok Bay is Ca/Mg-HCO3→ Na (Mg)-Cl→ Na-Cl, which led to increased Na+, K+, and HCO3 concentrations in groundwater and enrichment of fluorine in groundwater caused fluorine pollution.

TL;DR: In this article, the authors used TE-TIMS Pb-Pb ages for five mafic dykes across the Western Dharwar Craton (WDC) reveal emplacement ages of 2212.3, 0.9, and 0.7.

TL;DR: In this article, the authors reconstructed the tectono-thermal evolution of Cambrian-Ordovician strata and the hydrocarbon generation history of the Tarim Basin, which suggests that the eastern Tarim basin may also have hydrocarbons potential and can guide future oil and gas exploration.

TL;DR: In this article, a new calibration strategy for rutile U-Pb dating using the most popular zircon as reference material was developed, which could effectively decrease the matrix-dependent elemental fractionation of rutiles and zircons to a better level.

TL;DR: In this paper, the authors investigated the petrogenesis and tectonic setting of andesitic-dacitic-rhyolitic volcaniclastic rocks and dacitic porphyries in the Sanweishan area, northern Dunhuang region.

TL;DR: In this paper, the authors investigated and mapped ground fissures in more than 1500 localities across 22 provinces in China to reveal their spatial distribution, and analyzed the generative processes of ground fracture formation.

TL;DR: In this article, the authors determined a new model of S-wave velocity tomography under Mainland China and surrounding areas by inverting 321,666 Swave arrival times from 15,618 events recorded by the China Seismic Network (CSN) and at stations in East Asia compiled by the International Seismological Center (ISC).

TL;DR: In this article, a comparison of residual Jurassic strata in the northwestern Qaidam Basin, the adjacent Saishiteng Mountains and the Suganhu area to the north based on sedimentology and provenance analyses was performed.

TL;DR: In this article, seawater intrusion into coastal aquifers at Cha-Am District in Phetchaburi Province (Thailand), as a model area that is adversely affected by this problem, was evaluated.

TL;DR: In this article, the authors present a low-temperature thermochronology from a broad region covering major tectonic units including the Xuefeng, Jiuling, Nanling, and Wuyi mountains.

TL;DR: Based on observations in cores and thin sections as well as elemental and organic geochemical analyses, the authors systematically analyzes petrological characteristics of Eocene lacustrine fine-grained sedimentary rocks in the Jiyang Depression from perspectives of mineralogical compositions, sedimentary structures and organic matter abundance.