Article
Geosciences, Multidisciplinary
Ayon Saha, Dhiman Kumer Roy, Rahat Khan, Tahsin Islam Ornee, Sukhen Goswami, Abubakr M. Idris, Pradip Kumar Biswas, Umma Tamim
Summary: The geochemical compositions, provenance, climate, weathering intensity, and tectonic setting of sediments from the Padma River in Bangladesh have been studied. The results suggest that the sediments are chemically immature arkose that originated from the Higher Himalaya under semi-arid to semi-humid climatic conditions. The sediments have a felsic source origin and were deposited in a passive continental margin.
Article
Geosciences, Multidisciplinary
J. Arribas, G. Garzon, R. Tejero, M. Tsige
Summary: The Rana unit is a relict alluvial fan unit located on the northern border of the Guadiana Basin, with sediment provenance from intensely weathered products, indicating the influence of chemical weathering on sediment source and maturity.
Article
Geosciences, Multidisciplinary
Nagarajan Ramasamy, Kessler Franz, John Jong, Ramkumar Muthuvairavasamy, Abdulmajid Ali Muhammad, Vivian Dayong, Lalitguha Shanmugarajah, Natalie Vusak, Kovin Sivanasvaran, Desianne Kinanthi
Summary: The stratigraphic records of the Palaeocene-Eocene provide valuable information on environmental and climatic signals. The study of turbiditic sedimentary rocks in NW Borneo reveals insights into palaeoweathering, tectonic setting, and provenance, with a primary source area of felsic rocks from the Schwaner Mountains. The sediments suggest a transition from an active continental margin setting in the Palaeocene to a passive margin setting in the Eocene.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Juan Moises Casas-Pena, Juan Alonso Ramirez-Fernandez, Fernando Velasco-Tapia, Eduardo Alejandro Aleman-Gallardo, Carita Augustsson, Bodo Weber, Dirk Frei, Uwe Jenchen
Summary: The study describes the Tamatan Group in the Huizachal-Peregrina Anticlinorium in northeastern Mexico, proposing a provenance model based on new petrological and geochemical data. The sediments show derivation from various rock types, intense weathering, and high recycling of the source area.
Article
Chemistry, Multidisciplinary
Penglin Zhang, Qingtao Meng, Zhaojun Liu, Fei Hu
Summary: The mineralogy and geochemistry of Lower Cretaceous Jiufotang Formation oil shales in northeastern China indicate a source from a collision system with characteristics of active continental margin, intense chemical weathering, and sediment recycling, deposited in a stable tectonic setting.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Geosciences, Multidisciplinary
Yawooz A. Kettanah, Alan S. Abdulrahman
Summary: Petrographic and geochemical studies were conducted on the sandstones of Upper Miocene Injana Formation in the Hemrin South Mountain area, northern Iraq. The sandstones exhibited immature composition and texture, with a wide range of heavy minerals. Geochemically, they were enriched in certain elements and showed distinct trends in rare earth elements. The research provided important insights into the provenance and depositional environment of the sandstones.
GEOLOGICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Zhongwei Wang, Wangzhong Zhan, Jian Wang, Qinghua Peng, Wei Wei, Duo Wang, Qilin Ma, Chunyan Song, Xinglei Feng
Summary: By synthesizing petrographic, mineralogical, geochemical, and detrital zircon U-Pb age data, the chemical weathering history, provenance, and tectonic setting of the Late Triassic Qiangtang Basin were constrained, providing insights into its tectonic evolution.
Article
Geochemistry & Geophysics
Xiaoneng Luo, Ziying Li, Yuqi Cai, Chao Yi, Zilong Zhang, Yuyan Zhang, Yan Zhang
Summary: The sandstone samples from the Huanhe Formation in the Naogaodai area of the Ordos Basin were found to be feldspar-rich with mainly quartz, albite, and plagioclase minerals. The distribution of light rare earth elements was enriched and fractionated compared to heavy rare earth elements, indicating a homogeneous source. The immature properties of the sediment suggest a first-order cycle deposition, with geochemical characteristics indicating passive margin deposition with moderate weathering.
Article
Geosciences, Multidisciplinary
Temitope Love Baiyegunhi, Kuiwu Liu, Oswald Gwavava, Christopher Baiyegunhi, Maropene Rapholo
Summary: An inorganic geochemical investigation of mudrocks and sandstone in the southern Bredasdorp Basin, South Africa, revealed different lithologies and provenances, with the rocks derived from felsic igneous rocks. Tectonic setting discrimination diagrams support a passive-active continental margin setting, and the similar compositions of the analysed samples to sedimentary rocks from the East African Rift System suggest a rifted basin tectonic setting.
Article
Geochemistry & Geophysics
Mengya Chen, Fengjun Nie, Fei Xia, Zhaobin Yan, Dongguang Yang
Summary: The SW Songliao Basin in northern China is a crucial part of the sandstone uranium metallogenic belt. The Yaojia Formation is the most important ore-bearing layer in this region but its poorly understood sedimentology has restricted the understanding of the basin and the exploration of uranium deposits. To determine the sedimentology, provenance, and tectonic setting of the Yaojia Formation, the researchers conducted petrography, whole-rock geochemical analysis, and electron probe research. The results indicate that the sandstone in the Yaojia Formation is mainly composed of lithic sandstone and feldspar lithic sandstone. Uranium exists in two forms: independent minerals and adsorption uranium. The geochemical characteristics of the sandstones suggest that they are primarily derived from felsic igneous rocks in the upper continental crust in active continental margin and continental island arc environments.
Article
Multidisciplinary Sciences
Abdullah M. Alqubalee, Lameed O. Babalola, Osman M. Abdullatif, Hassan A. Eltom
Summary: This study characterized the depositional environments of Hirnantian glaciogenic deposits using geochemical data, and investigated their provenance and tectonic setting. The research found that the sediments from different facies associations showed varying levels of maturity and weathering impacts, with important implications for reservoir quality prediction and understanding the geochemical distributions in these deposits.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Jian Li, Jingchun Tian, Xiang Zhang, Qingshao Liang, Minghong Peng
Summary: By combining geochemistry and petrology, this study investigated the Xifangshan Formation sandstones in the Precambrian northwestern Tarim Basin, NW China. The results suggest that the sandstones were deposited in an oxic-suboxic marine environment with a felsic provenance from an acidic magmatic arc.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geology
Jie Gao, Dawei Lv, A. J. Tom van Loon, James C. Hower, Munira Raji, Yi Yang, Zhonghe Ren, Yujia Wang, Zhihui Zhang
Summary: This study analyzed the major, trace, and rare earth elements in coal and silty mudstones from the Yan'an Formation in the Ordos Basin. The results indicate that they are primarily sourced from felsic and intermediate rocks in a continental island arc setting. The study also highlights the importance of provenance analysis in studying the sedimentary environments of coal-bearing successions.
ORE GEOLOGY REVIEWS
(2022)
Article
Multidisciplinary Sciences
Olusola J. Ojo, Suraju A. Adepoju, Ayodeji Awe, Moses O. Adeoye
Summary: The Lokoja Formation consists mainly of sandstones with potential hydrocarbon reservoirs, showing signs of compositional immaturity and weathering effects.
Article
Geosciences, Multidisciplinary
Patrice Roland Liyouck, Gabriel Ngueutchoua, John Selvamony Armstrong-Altrin, Aristide Nadine Sonfack, Yannick Steve Kontchipe Ngagoum, Armel Zacharie Ekoa Bessa, Victorine Ambassa Bela, Duviol Arcange Tsanga, Armand Sylvain Ludovic Wouatong
Summary: The Sanaga River in central Cameroon mainly flows over metasediments, amphibolites and orthogneisses, granitoids, sedimentary clastic rocks, and Cenozoic volcanic rocks. The study of stream sediments' texture, heavy minerals, major and trace element concentrations, and rare earth elements can provide information about the origin of alluviums and tectonic setting of source rocks. The results suggest a high maturity of the sediments, intense weathering in the source area, and that the sediments mainly come from felsic source rocks. Paleotectonic investigations indicate passive and rift settings for the river's drainage basin, supported by the presence of rare ophiolitic rocks.
JOURNAL OF AFRICAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Sajid Ali, Ed C. Hathorne, Martin Frank
Summary: This study used radiogenic isotope data to analyze the weathering process induced by the South Asian monsoon over the past 27 million years, showing a consistent source mixture dominated by Himalayan rocks and the Indo-Burman ranges. The significant increase in primary clay mineral abundance during the late Miocene cooling period suggests a shift in the weathering regime, possibly due to increased aridity and changes in atmospheric circulation.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Geochemistry & Geophysics
Chao Zhang, Juergen Koepke, Paul Eric Wolff, Ingo Horn, Dieter Garbe-Schoenberg, Jasper Berndt
Summary: The study of an outcrop from the Oman ophiolite sheds light on hydrothermal activities in the lower crust at fast-spreading mid-ocean ridges, indicating a wide temperature range and complex veining system resulting from fluid circulations shortly after gabbro solidification.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
M. Kirchenbaur, S. Schuth, A. R. Barth, A. Luguet, S. Koenig, A. Idrus, D. Garbe-Schoenberg, C. Muenker
Summary: Many terrestrial silicate reservoirs show depleted Nb content, which is explained by the presence of reservoirs on Earth with superchondritic Nb/Ta. K-rich lavas from the Indonesian Sunda rear-arc have been used as an example to tap into these high-Nb/Ta reservoirs. In this study, samples from the Javanese rear-arc volcano Muria were analyzed to understand the petrogenetic processes and causes for the superchondritic Nb/Ta in these lavas. Data from an along-arc sequence of lavas from the Indonesian part of the Sunda arc were also included. Major and trace element concentrations, isotope compositions, and HFSE concentrations were analyzed. The geochemical data, combined with melting models, show regional variations in subduction components along the arc, with sediment-derived components affecting the HFSE budget of the frontal arc lavas and more hybrid and enriched mantle sources contributing to the K-rich rear-arc lavas. The superchondritic Nb/Ta in the rear-arc lavas are attributed to deep melting involving slab melts formed from an enriched garnet-rutile-bearing eclogitic residue. Sub-arc slab melting may have been triggered along a slab tear beneath the Sunda arc, coinciding with a paucity in arc volcanism and thrusting of the Javanese basement crust.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Yue Ma, Syee Weldeab, Ralph R. Schneider, Nils Andersen, Dieter Garbe-Schonberg, Tobias Friedrich
Summary: The research provides strong evidence for the strengthening of the southern African monsoon in response to enhanced instability of the high latitude climate over the past 26,000 years. Additionally, during Heinrich event 1, a reversal of the mixed layer temperature gradient between the eastern and western Mozambique Channel was observed.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
J. Koepke, D. Garbe-Schoenberg, T. Mueller, D. Mock, S. Mueller, S. Nasir
Summary: In this study, a reference profile of the Samail ophiolite was established to mimic fast-spreading oceanic crust on land, providing insights into the formation mechanisms and mineral compositions of the lower crust gabbros. The results suggest a hybrid accretion mechanism with injection of melt sills and in situ crystallization, as well as a trend of upward differentiation in the lower two thirds of the crust. The upper third of the gabbroic crust is significantly more differentiated, indicating a model of downward differentiation from a primitive parental melt.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Samuel Mueller, Dieter Garbe-Schoenberg, Jurgen Koepke, Kaj Hoernle
Summary: The study presents new data on the chemical composition and crystallization temperatures of gabbros in the Samail Ophiolite. The results show variability in composition and crystallization temperatures within the gabbros, suggesting hybrid accretion of fast-spreading oceanic crust.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Michael Bau, Robert Frei, Dieter Garbe-Schoenberg, Sebastian Viehmann
Summary: This study investigated the origin of Banded Iron-Formations (BIFs) using a high-resolution integrated multi-proxy approach, revealing distinct geochemical signatures of adjacent BIF bands, indicating different formation processes and water sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Dieter Garbe-Schoenberg, Juergen Koepke, Samuel Mueller, Dominik Mock, Tim Mueller
Summary: Due to the inaccessibility of oceanic crust, there is no complete data set available for the composition of modern fast-spreading oceanic crust. However, through sampling in the Oman Ophiolite, we were able to observe systematic and contrasting compositional trends in lower and upper gabbros, correlated with stratigraphic depth. A discontinuity in crystallization regime was observed at a certain depth, leading to different compositions. This study provides new insights into the composition of fast-spreading oceanic crust.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Environmental Sciences
P. Samal, S. R. Singarasubramanian, M. C. Manoj, J. Srivastava, N. Dsouza, K. Balakrishna, M. M. Chauhan, S. Ali
Summary: The deltaic areas of the Mahanadi River basin are at risk of contamination from sewage, industrial waste, and agricultural runoff. A study on the sediment in the region revealed high levels of heavy metal pollution, with cobalt and lead concentrations exceeding the global average values. This pollution is likely anthropogenic, possibly from the heavy use of pesticides in agricultural land. The study also found a mild carcinogenic risk for children due to chromium exposure.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Geography, Physical
Pujarini Samal, Saradambal Ramchandaran Subramanian, Jyoti Srivastava, Masud Kawsar, Madhusudanan Chandrika Manoj, Gundiga Puttajirao Gurumurthy, Mohd Munazir Chauhan, Sajid Ali, Mahboob Alam, Anupam Sharma, Partha Sarathi Jena, Ajay Shivam, Ravi Bhushan
Summary: Understanding the impact of climate change on vegetation cover in the past is important to predict future scenarios. A study in the Mahanadi River delta reconstructed the hydroclimate over the past 2600 years using biotic and abiotic proxy records. The results showed variations in climate, including periods of cold and dry climate, increased precipitation, and dry periods.
Article
Geosciences, Multidisciplinary
Trevor J. Falloon, Kaj Hoernle, Bruce F. Schaefer, Ilya N. Bindeman, Stanley R. Hart, Dieter Garbe-Schonberg, Robert A. Duncan
Summary: Lava samples from Christmas Island show a wide range of isotopic signatures, indicating different sources including enriched mantle, lower continental crust, and subcontinental lithospheric mantle. The study suggests that these components may come from shallow melting of the Indian mid-ocean ridge and recycling during the breakup of Gondwana, with evidence of the presence of ancient components.
Article
Ecology
Sarina Schmidt, Ed C. Hathorne, Joachim Schoenfeld, Dieter Garbe-Schoenberg
Summary: Heavy metal pollution is increasing in many parts of the world, even after the pollution source has ceased. The incorporation of heavy metals into foraminiferal calcite tests shows species-specific differences and can be used as a tool for monitoring anthropogenic impacts on the environment.
Article
Geosciences, Multidisciplinary
Garry Singla, Sajid Ali, Birendra P. Singh, Om N. Bhargava, Scott Morrison, Ramanpreet Kaur, Madhusudhan Sati, Stanzin Stopden
Summary: This study presents trace-element compositions and rare-earth elements (REEs) analyses of the Cambrian Series 2-Wuliuan (Miaolingian), Kunzam La Formation from the Sumna Valley in the Tethyan Himalaya. The results indicate that the sediments in the Sumna Valley were derived from a felsic source and were deposited in a passive continental margin tectonic setting. The deposition process was under oxidizing conditions and the sedimentary site was close to a near-shore environment. Additionally, a major transgressive event was identified at the boundary of the Cambrian Series 2-Wuliuan (Miaolingian) associated with the Oryctocephalus indicus biozone.
JOURNAL OF EARTH SYSTEM SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Anjum Farooqui, Suresh K. Pillai, Deepa Agnihotri, Salman Khan, Rajni Tewari, Sunil K. Shukla, Sajid Ali, Anjali Trivedi, S. K. Pandita, Kamlesh Kumar, G. D. Bhat, Rajesh Agnihotri
Summary: The rise of the Himalayas during the Plio-Pleistocene period influenced the Indian Summer Monsoon in the Karewa basin, resulting in a shift from tropical flora to Himalayan temperate flora. This change was driven by the altitudinal rise of the Pir Panjal Mountains, which obstructed the southwest monsoon and led to lower precipitation and temperature.
JOURNAL OF EARTH SYSTEM SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Maike Leupold, Miriam Pfeiffer, Takaaki K. Watanabe, Lars Reuning, Dieter Garbe-Schoenberg, Chuan-Chou Shen, Geert-Jan A. Brummer
Summary: The study reconstructs past sea surface temperatures in the central Indian Ocean using coral Sr/Ca records from the Chagos Archipelago, showing that ENSO drives interannual variability in coral records and the ENSO-SST teleconnection has been stable since the 17th century. Composite records of positive and negative ENSO-driven SST anomaly events reveal a symmetric ENSO response in the tropical Indian Ocean.
CLIMATE OF THE PAST
(2021)