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Geosciences Journal
IF
1.49
Papers
1214
Papers 1233
1 page of 124 pages (1,233 results)
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#1Archana Bhagwat Kaotekwar (CSIR: Council of Scientific and Industrial Research)
#2Syed Masood Ahmad (CSIR: Council of Scientific and Industrial Research)H-Index: 13
Last.Aradhi Keshav Krishna (CSIR: Council of Scientific and Industrial Research)
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Major and trace elements, including rare earth elements (REEs) geochemistry of bed sediments from the lower reaches of Krishna river suggest their origin mainly from weathering of Deccan basalts and Precambrian rocks of the southern India. The elemental compositions indicate evidence of sedimentary sorting during weathering, transportation and deposition. Highly depleted Na2O and high values of Chemical Index of Alteration (CIA) are suggestive of moderate to strong chemical weathering environmen...
#1Dun Wu (USTC: University of Science and Technology of China)
This paper reports systematically the redox sensitive elements (Mo, V, Cd, Cr, U and Th) and carbon and oxygen isotope data of the Late Carboniferous Taiyuan Formation limestone in the Huainan Coalfield in the southern margin of North China Platform, combined with the observation of limestone slice, and tries to explain the sedimentary environment of each layer of limestone. Through the analysis of the diagenesis of each layer of limestone, except for L7 and L12 limestone, the lithogenesis chang...
#1Changqing Ren (China University of Petroleum)
#2Fugui He (China University of Petroleum)H-Index: 1
Last.Han Feng (PetroChina)
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The Shulu Sag which is a rifted sag with NNE trend is located in the south of Jizhong Depression, Bohai Bay Basin, northern China. The gentle slope and three troughs are situated in the west and east of the sag, respectively. Both of the lower part of Shasan Member (Es3x) and the lower part of Shayi Member (Es1x) act as source rocks in this sag. Researches on the type, quantity, quality and thermal maturity of the respective organic matter have been conducted using Rock-Eval pyrolysis data. Type...
#1Mallika K. Jonnalagadda (Savitribai Phule Pune University)H-Index: 2
#2N. R. Karmalkar (Savitribai Phule Pune University)H-Index: 5
Last.Sagar Kamble (Savitribai Phule Pune University)
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The Spontang ophiolite complex exposed along the Indus Tsangpo Suture Zone (ITSZ) represents a fragment of oceanic lithosphere emplaced after the closure of the Neo-Tethyan Ocean. The complex lying south of the ITSZ forms the highest tectonic thrust slice above the Mesozoic–Early Tertiary continental margin in the Ladakh-Zanskar Himalaya. The complex consists of a well-preserved ophiolite sequence dominated by peridotites, gabbros and ultramafic cumulates along with highly tectonized sheeted dyk...
#1Quang Khai Ha (Kunsan National University)
#2Kangjoo Kim (Kunsan National University)H-Index: 22
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Southern Vietnam is known as one of the most vulnerable areas to climate change in the world due to its low elevation and flat topography, heavy groundwater use, and dense population. This paper introduces hydrogeological conditions and critically reviews groundwater issues that southern Vietnam faces by summarizing previous literatures. Issues that this paper covers include groundwater use and associated phenomenon, acid sulfate soils, the occurrence of saline groundwaters, seawater intrusion, ...
#1Eun-Young Yeo (CNU: Chungnam National University)H-Index: 1
#2Jeong-Heon ChoiH-Index: 13
Last.Albert Chang-sik Cheong (CNU: Chungnam National University)H-Index: 1
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Jeju Island, which lies on the continental shelf in the southern Korean Peninsula, is the emergent portion of a basaltic volcanic field that has erupted since the Early Pleistocene (ca. 1.8 Ma). Volcanic activity that continued into historic times (ca. 1 ka) formed an elongated shield with a central edifice (Mt. Halla) and more than 300 monogenetic cones and rings. The establishment of a temporal framework for Jeju volcanism, particularly during the Late Pleistocene and Holocene activities, requ...
#1Hyo-Jong Lee (SNU: Seoul National University)H-Index: 16
#2Min Sub Sim (SNU: Seoul National University)
Last.Taejin Choi (Chosun University)
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Several nonmarine basins were formed in SW Korea under an extensional or transtensional tectonic regime during the Cretaceous. The Neungju Basin is one of these basins, filled by alluvial to lacustrine deposits interbedded with thick, amalgamated tuff beds. Facies analysis in the northern part of the basin shows that the basin fill is composed of four facies associations, representing (1) alluvial fan, (2) alluvial plain, (3) sandflat, and (4) marginal playa lake environments. The basin fill can...
#1Tayyaba Mateen (Kadai: Kagoshima University)H-Index: 1
#2Kazuaki Okamoto (Saitama University)H-Index: 18
Last.Hiroshi Yamamoto (Kadai: Kagoshima University)H-Index: 15
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U-Pb-Hf isotopes of zircons from the granitic intrusive rocks in the Iwakuni area of Southwest Japan are determined by LA-ICP-MS analysis. The Gamano Granodiorite belonging to the Older Ryoke Granites of the Ryoke Belt yielded U-Pb mean age of 92.3 ± 2.6 Ma (MSWD = 1.8). The Namera Granite belonging to the Younger Ryoke Granites of the Ryoke Belt yielded U-Pb mean age of 106.3 ± 1.6 Ma (MSWD = 2.3). The Shimokuhara Granite belonging to the Hiroshima Granites of the San-yo Belt yielded U-Pb mean ...
#1Tuofei Zhao (JLU: Jilin University)H-Index: 2
#2Bo PengH-Index: 3
Last.Fengyue Sun (JLU: Jilin University)H-Index: 3
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The timing of closure of the paleo-Asian Ocean in northeastern China remains contentious. To investigate this problem and better constrain the final closure time of the paleo-Asian Ocean, we report the geochemical characteristics, zircon U-Pb chronology, and Hf isotopes of the Yangjin’gou granite porphyry in the Hunchun region in the easternmost segment of the Solonker- Xar Moron-Changchun-Yanji Suture (SXCYS). The zircon U-Pb age of the Yangjin’gou granite porphyry is 247.1 ± 1.5 Ma (mean squar...
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