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Petrogenesis, LA-ICP-MS zircon U-Pb geochronology and geodynamic implications of the Kribi metavolcanic rocks, Nyong Group, Congo craton
Springer Science and Business Media LLC - Tập 41 - Trang 470-495 - 2022
Hermine Mvodo, Sylvestre Ganno, Gus Djibril Kouankap Nono, Donald Hermann Fossi, Philomene Estelle Nga Essomba, Marvine Nzepang Tankwa, Jean Paul Nzenti
Metavolcanic rocks are well-exposed in the Kribi area within the Nyong Group, Congo craton, but their origin, age, and tectonic significance are poorly known. Here we report integrated field mapping and petrography, geochemistry, and LA-ICP-MS zircon U-Pb ages of these metavolcanic rocks to constrain their petrogenesis and geodynamic implications. The studied rocks consist of mafic granulite, garn...... hiện toàn bộ
Nitrous oxide (N2O) emissions from a mesotrophic reservoir on the Wujiang River, southwest China
Springer Science and Business Media LLC - Tập 36 - Trang 667-679 - 2017
Xiaolong Liu, Siliang Li, Zhongliang Wang, Guilin Han, Jun Li, Baoli Wang, Fushun Wang, Li Bai
Aquatic ecosystems have been identified as a globally significant source of nitrous oxide (N2O) due to continuous active nitrogen involvement, but the processes and influencing factors that control N2O production are still poorly understood, especially in reservoirs. For that, monthly N2O variations were monitored in Dongfeng reservoir (DFR) with a mesotrophic condition. The dissolved N2O concentr...... hiện toàn bộ
Variations of trace elements under hydrological conditions in the Min River, Eastern Tibetan Plateau
Springer Science and Business Media LLC - Tập 37 - Trang 509-518 - 2018
Xuetao Zhu, Yun-chao Lang, Jun Zhong, Hu Ding, Huijun He, Zhifeng Yan, Si-liang Li
In order to better understand the relative importance of hydrologic variation and anthropogenic disturbance and their complex interactions within the trace elemental geochemical cycle, water samples were collected monthly over 1 year in the Min River, eastern Tibetan Plateau, and analyzed for trace element composition. The dissolved trace elements exhibited different relationships with increasing ...... hiện toàn bộ
Hydrocarbon distribution along the Soapaga thrust (Eastern Cordillera, Colombia) based on new strategic geochemistry samples
Springer Science and Business Media LLC - Tập 41 - Trang 335-350 - 2021
Eduardo A. Rossello, Rolando Di Primio
The Colombian Eastern Cordillera constitutes a region with potential for finding hydrocarbon reserves that are still under-explored, despite the existence of oil and tar sand production. The intense tectonic deformation affects the petroleum systems and increases exploration challenges due to the different generation, maturation, and entrapment conditions that they produce. Diverse geochemical ana...... hiện toàn bộ
Preliminary analysis on roles of metal–organic compounds in the formation of invisible gold
Springer Science and Business Media LLC - Tập 40 - Trang 1050-1072 - 2021
Medet Junussov, Mádai Ferenc, Kristály Ferenc, Tóth Tivadar, Fintor Krisztián, Muránszky Gábor, Prekob Ádám, Hámor-Vidó Mária
The paper comprises new analytical data on the nature and occurrence of gold in solid pyrobitumen, closely associated with the main gold-bearing sulfide arsenic ores of the Bakyrchik gold deposit (Kazakhstan), related to post-collisional magmatic-hydrothermal origin. Gold mineralization of the deposit occurs mainly in the form of an “invisible” type of gold in the structures of arsenian pyrite and...... hiện toàn bộ
Petrogenesis of the Borjuri diorite pluton in the Mikir Massif of Northeast India: implications for post-collisional intermediate magmatism during the Pan-African orogeny
Springer Science and Business Media LLC - Tập 42 - Trang 747-764 - 2023
Tribujjal Prakash, Ashima Saikia, Pallabi Basumatary, Bibhuti Gogoi
The Assam-Meghalaya Gneissic Complex (AMGC) of northeast India contains numerous Pan-African granitic bodies that have been attributed to post-collisional rift-related magmatism. The present study is concerned with the first appraisal of intermediate magmatism (diorite, monzonite, and monzodiorite) found in the Borjuri Pluton of Mikir Massif, which is the eastern extension of AMGC. The diorites ar...... hiện toàn bộ
Gardaneh Salavat porphyry copper system: Is it about metal endowment or fertility of the porphyritic intrusion?
Springer Science and Business Media LLC - Tập 41 - Trang 496-514 - 2022
Seyyed Reza Mashhadi
Gardaneh Salavat porphyry copper system is located in the northwest of Iran. It comprises a quartz diorite to diorite porphyritic intrusion that created extensive alteration haloes in the host rocks. Despite all technical considerations, the exploration activities did not yield to ore discovery. As the matter of fact, all of the geological, geophysical, and geochemical characteristics of a porphyr...... hiện toàn bộ
The assessment of heavy metal pollution in river sands of Jalingo, Nigeria using magnetic proxy parameters, pollution, and ecotoxicological indices
Springer Science and Business Media LLC - Tập 41 - Trang 1083-1103 - 2022
Maxwell O. Kanu, Augustine A. Abong
The measurement of environmental magnetic properties and metal contents of sands from Nukkai (NKR), Mayo-Gwoi (RMYG) and Lamurde (LR) rivers located in Jalingo, Nigeria are reported. We seek to determine the extent of anthropogenic impact on the river sands using magnetic-proxy-parameters, pollution and ecotoxicological indices and multivariate statistics. Measurements of magnetic susceptibility χ...... hiện toàn bộ
Equilibrium and kinetic Si isotope fractionation factors and their implications for Si isotope distributions in the Earth’s surface environments
Springer Science and Business Media LLC - Tập 35 - Trang 15-24 - 2015
Hong-tao He, Siting Zhang, Chen Zhu, Yun Liu
Several important equilibrium Si isotope fractionation factors among minerals, organic molecules and the H4SiO4 solution are complemented to facilitate the explanation of the distributions of Si isotopes in Earth’s surface environments. The results reveal that, in comparison to aqueous H4SiO4, heavy Si isotopes will be significantly enriched in secondary silicate minerals. On the contrary, quadra-...... hiện toàn bộ
Facies development and sedimentology of the Middle Miocene carbonates of the Raghama Formation, northeastern Saudi Arabia
Springer Science and Business Media LLC - - Trang 1-10 - 2023
Mansour H. Al-Hashim, Abdelbaset S. El-Sorogy, Meshal Wadani
Ragahama Formation comprises a siliciclastic continental deposits followed by marine carbonates, representing prograding alluvial fans from adjacent high hinterlands seaward into lagoons and fringing reef environments. The present work aimed to document the facies development and sedimentology of the Raghama carbonates exposed along the eastern coastal plain of the Red Sea, northwestern Saudi Arab...... hiện toàn bộ
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