Article
Geochemistry & Geophysics
Felipe Holanda dos Santos, Wagner da Silva Amaral, Ernest Chi-Fru, Ana Clara Braga de Souza, Alice Bosco-Santos
Summary: The study reveals a unique pathway in Paleoproterozoic Mn mineralization, involving the transfer of Mn oxides from an oxygenated upper ocean reservoir to a predominantly deep anoxic silicate reservoir. This mechanism differs from the commonly reported reductive transfer of Mn to a diagenetic carbonate sink during the Paleoproterozoic.
Article
Geology
Deepak Kumar Agarwal, Bulusu Sreenivas
Summary: The evolution of atmospheric oxygen levels had a profound impact on Earth's surface processes, particularly on the mineralization of redox-sensitive elements like iron and uranium. In India, the majority of uranium deposits are found in Proterozoic rock formations, unlike the global pattern where Phanerozoic strata are more prominent. The enrichment of uranium reserves in Proterozoic strata of India is attributed to the emplacement of large ion lithophile element-enriched granites, the Great Oxidation Event, and ensuing oceanic anoxic conditions.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geosciences, Multidisciplinary
Pedro Martinez, Alessandro Batezelli, Francisco Ladeira, Leticia Correa, Diego Luciano Nascimento
Summary: This study investigates the paleoenvironmental significance of kaolinite-rich weathering fronts in the Cretaceous Sanfranciscana Basin in Brazil. The results suggest that the basin experienced climatic amelioration and a rise in water table level during the Cretaceous, leading to dune stabilization and the formation of an extensive geomorphic surface.
Article
Geosciences, Multidisciplinary
Hugo Moreira
Summary: The analysis of mineral inclusions in magmas indicates significant changes in the oxidation state of sulfur before and after the Great Oxidation Event. These changes are attributed to the recycling of sediments altered by atmospheric events at the Earth's surface into the mantle.
Article
Multidisciplinary Sciences
Nicholas F. Wogan, David C. Catling, Kevin J. Zahnle, Mark W. Claire
Summary: The Great Oxidation Event (GOE), which marks the appearance of an oxygen-rich atmosphere, is considered one of the most important events since the origin of life. In this study, researchers developed a one-dimensional time-dependent photochemical model to investigate the behavior of the transitional atmosphere during changes in biogenic forcing. The simulations showed that transitions between anoxic and oxic atmospheres could occur within a few hundred to a few thousand years, and the stability of oxygen in the atmosphere was dependent on its concentration.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geology
Nabil A. Shawwa, Thomas R. McLoughlin-Coleman, Michael G. Babechuk, Robert H. Rainbird
Summary: Detailed sedimentological and stratigraphic analysis of the Cobalt Basin in Canada provides important insights into the transitions from glacial to post-glacial sedimentary systems, as well as the paleoenvironments during the Earth's Great Oxidation Event. The preserved stratigraphic succession includes glaciomarine, deltaic, and fluvial braidplain deposits, indicating a progradation from a glacial environment to a warmer and humid climate. The study also suggests that the progradation of the sedimentary successions in the Cobalt Basin was likely influenced by relative sea-level fall linked to glacial isostatic uplift.
SEDIMENTARY GEOLOGY
(2023)
Article
Biology
Erica V. Barlow, Christopher H. House, Ming-Chang Liu, Maxwell T. Wetherington, Martin J. Van Kranendonk
Summary: This study investigates well-preserved microfossils from Western Australia dating back approximately 2.4 billion years ago. By analyzing the morphology, habitat, reproduction, and metabolism of these microfossils, the research reveals an increase in the complexity of life during the great oxidation event.
Article
Geosciences, Multidisciplinary
Prasanta Kumar Mishra, Sarada Prasad Mohanty
Summary: The chemogenic sediments of the Chilpi Group in the Bastar Craton have been analyzed for sedimentary environment, geochemistry, and redox evaluation of seawater towards the end of the Paleoproterozoic Era. The presence of reducing conditions in the shallow sea towards the late Paleoproterozoic Era indicates a suboxic to anoxic environment, unaffected by the Great Oxidation Event. The evaluation of multielement concentration suggests minimal effects of detrital contamination, diagenesis, metamorphism, and hydrothermal contributions, with a preservation of pristine marine nature of the carbonates.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Daniel Garduno Ruiz, Colin Goldblatt, Anne-Sofie Ahm
Summary: A one-dimensional atmospheric photochemical model is used to study the effect of temperature and humidity variations on the evolution of O2 and O3 during the Great Oxidation Event (GOE). It is found that changes in temperature and humidity can significantly impact the levels of O2 and O3, with higher temperatures and humidity leading to higher levels of these gases.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Zhicheng Liu, Lifei Zhang
Summary: The carbon cycle is a crucial process that influences Earth's evolution. By comparing two distinct periods, the Paleoproterozoic and Neoproterozoic, significant geological events were analyzed to understand when modern plate tectonics emerged and its impact on the carbon cycle. During the Paleoproterozoic, intense weathering in an atmosphere rich in CO2 and CH4 resulted in increased nutrient input into the ocean, boosting productivity and forming altered oceanic crust. Subduction facilitated the transportation of carbon into the deep mantle. From the Paleoproterozoic to Phanerozoic, the carbon cycle played a pivotal role in shaping a habitable Earth.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2023)
Article
Geology
Caiyun Lan, Xiaoping Long
Summary: The Paleoproterozoic Great Oxidation Event (GOE) led to a dramatic change in atmospheric composition, making oxygen a persistent component in global surface processes. However, the distribution of dissolved oxygen in the ocean during this event remains unclear. By analyzing samples from the Upper Taihua Group in the Lushan area, researchers found evidence of redox-stratified seawater and a marine depositional setting. The presence of both oxic and suboxic/anoxic water in the ocean during the GOE was revealed, suggesting extensive redox stratification.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Gregory J. Retallack, Zhong-Qiang Chen, Yuangan Huang, Yuheng Fang
Summary: The so-called "boring billion" (1800-800 Ma) in the Late Paleoproterozoic and early Mesoproterozoic era has been reassessed based on diverse paleosols in the Ruyang Group in Henan Province, China. These ancient soils reveal evidence of hyperarid climate, atmospheric composition, and oxygen levels supporting animal life.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Hongjin Chen, Germain Bayon, Zhaokai Xu, Tiegang Li
Summary: The Oceanic Anoxic Event 2 (OAE 2) during the late Cretaceous was characterized by extreme carbon cycle perturbations and major environmental and climate reorganization in terrestrial and marine realms. Chemical weathering of continental rocks played a crucial role in OAE 2, promoting marine primary production and organic carbon burial, and potentially driving the termination of OAE 2 through atmospheric CO2 drawdown. This study focuses on the evolution of continental chemical weathering in high-latitude regions during OAE 2.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Yuanlin Chen, Huan Li, Shangyi Gu, Gary G. Lash, Chaoyang Zheng, Shige Chen, Dadou Li, Safiyanu Muhammad Elatikpo, Liuan Duan
Summary: This study focuses on the carbon and oxygen isotopes and trace element geochemical data of the Paleoproterozoic marble deposits of the Jingshan Group in the Jiaolai Basin of the Jiaodong Peninsula, eastern China. The findings suggest that the marble deposits underwent recrystallization, metamorphism, and silicification, resulting in a significant positive 13C anomaly, possibly reflecting the global Lomagundi-Jatuli event. The geochemical analysis of rare earth and other trace elements indicates that the banded iron formation deposits associated with the Jingshan Group formed in a redox stratified ocean dominated by ferruginous conditions. Furthermore, the positive carbon isotope anomaly associated with the Lomagundi-Jatuli event is predominantly found in sediment deposited in shallow and coastal marine environments.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Francesco Narduzzi, Delphine Bosch, Pascal Philippot
Summary: The study examines the hypothesis that the emergence of continental landmasses and increased subaerial igneous province weathering triggered the Great Oxidation Event. The Nd-isotope data confirm the influence of crustal and hydrothermal components during this period, suggesting a significant role in the rise of atmospheric oxygen and the onset of glaciations.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Sarada P. Mohanty
GEOLOGICAL JOURNAL
(2020)
Article
Environmental Sciences
Niladri Bhattacharjee, Sarada Prasad Mohanty
ENVIRONMENTAL EARTH SCIENCES
(2020)
Article
Geography, Physical
Gopal Sharma, Suresh Kannaujiya, P. K. R. Gautam, Ajay Kumar Taloor, P. K. Champatiray, S. Mohanty
Summary: This study in the Himalayas utilized GPS data to analyze crustal motion, revealing variations in movement speeds of the Indian plate across different regions, suggesting potential earthquake risks due to locked fault systems.
QUATERNARY INTERNATIONAL
(2021)
Article
Engineering, Geological
Adarsh Tripathi, Noopur Gupta, Ashok Kumar Singh, Sarada P. Mohanty, Nachiketa Rai, Anindya Pain
Summary: Experimental investigations on the effects of elevated temperature on Barakar sandstone from the Jharia coalfield in India showed that thermal damage predominantly occurred in zone II, where rapid increase in crack density, porosity, and reduction in seismic wave velocities and mechanical properties were observed. The changes are attributed to thermal stress-induced micro-cracks, evaporation of organic matters, and mineral dehydration and decomposition.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Prasanta Kumar Mishra, Sarada Prasad Mohanty
Summary: The chemogenic sediments of the Chilpi Group in the Bastar Craton have been analyzed for sedimentary environment, geochemistry, and redox evaluation of seawater towards the end of the Paleoproterozoic Era. The presence of reducing conditions in the shallow sea towards the late Paleoproterozoic Era indicates a suboxic to anoxic environment, unaffected by the Great Oxidation Event. The evaluation of multielement concentration suggests minimal effects of detrital contamination, diagenesis, metamorphism, and hydrothermal contributions, with a preservation of pristine marine nature of the carbonates.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Sk. Shamim, Prosanta Kumar Khan, Sarada P. Mohanty, Manoranjan Mohanty
Summary: The Andaman-Nicobar-Sumatra subduction margin has a complex geological structure with the presence of multiple regional faults between the volcanic arc, fore-arc basin, and trench, causing deformation of lithospheric plates. The observed negative gravity anomaly in the margin's gravity model may be associated with a fore-arc shear fault above fractured oceanic crust with a thick sedimentary layer, located in an area of sharp bending of the converging Indian lithosphere in the fore-arc basin.
SURVEYS IN GEOPHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Prosanta Kumar Khan, Sarada P. Mohanty, Partha P. Chakraborty, Rashmi Singh
Summary: Analyzing the increase in seismic activity in northwest India, particularly around the Delhi-National Capital Region and adjacent NW Himalayan front, researchers have observed a moderate-to-low b-values trend since 2016, indicating a stabilization of the stress field in the region. The study also identified a structurally guided stress field between the Kachchh and NW Himalaya regions, coinciding with the direction of Indian plate convergence, and highlighted frequent occurrences of earthquakes in the Delhi, Kangra, and Uttarkashi areas. Additionally, the research proposes that faults in western Peninsular India act as stress guides, concentrating and increasing stress in regions of lithospheric flexure, potentially triggering a large earthquake.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Sarada P. Mohanty
Summary: The Bastar Craton is a key geological formation in Peninsular India, formed during the Paleoarchean Era and experiencing multiple orogenic events. Eventually amalgamating with the Bundelkhand Craton, it preserves sedimentary and metamorphic rocks from different periods, as well as early mineralization patterns, providing important insights into the evolution of the ocean and atmospheric conditions in the early Earth.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Sarada Prasad Mohanty, Prasanta Kumar Mishra
Summary: The Chilpi Group in the Bastar Craton, deposited after the Great Oxidation Event, provides valuable information about the redox state of the ocean and atmospheric oxygen content during a crucial period in Earth's history. The analysis of ironstones in the Chilpi Group indicates the presence of chamosite, greenalite, and siderite, suggesting a shallow sea environment. Geochemical analyses reveal high concentrations of Fe2O3total and SiO2 in iron-rich bands, while trace elements show good correlation with total REE concentration. The study also suggests a dysoxic to suboxic-anoxic condition in the depositional basin.
Article
Environmental Sciences
Swakangkha Ghosh, George Philip, Anup K. Prasad, Tajdarul H. Syed, Sarada P. Mohanty
Summary: With the increasing availability of high-resolution satellite data and the rapid development of Geographic Information System (GIS) technology, the mapping of active faults and quantification of tectonic activity in inaccessible regions has greatly improved. This study examined the tectonic activity in the Trans-Yamuna region of the NW Himalaya using geomorphic indices derived from a Digital Elevation Model (DEM). The results suggest that the majority of the region is tectonically active, with upliftment continuing to occur in the north of the Main Boundary Thrust (MBT).
GEOCARTO INTERNATIONAL
(2023)
Article
Geology
Sarada P. Mohanty
Summary: The Satpura Mountain Belt in Central India has undergone two phases of evolution, with evidence of basement-involved fold structures and deformation of the upper and lower crust. A tectonic model is proposed to explain the formation of the mountain belt through subduction-collision events and erosion.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Prasanta Kumar Mishra, Sarada Prasad Mohanty, Debadutta Mohanty, Mrinal Kanti Mukherjee
Summary: The concentration of phosphorus in seawater is important for marine productivity and life evolution. By studying the P/Fe ratio in iron-ore rocks and iron oxide-rich sediments, we can estimate the phosphorus concentration in seawater. In this study, we evaluated the P/Fe ratios of iron-rich rocks from the late Palaeoproterozoic Chilpi Group in Central India, and found that the phosphorus concentration during this period was low. This low phosphorus concentration may have hindered the evolution of eukaryotes due to reduced primary productivity caused by low atmospheric oxygen content.
GEOLOGICAL MAGAZINE
(2023)
Article
Materials Science, Multidisciplinary
Sarada P. Mohanty, Prasanta K. Mishra
Summary: The iron-rich rocks in Central India provide insights into the redox state of the depositional basin, as well as the formation temperature and oxygen levels. Additionally, the formation requirements for the rare mineral assemblage of magnetite-greenalite-cronstedtite are examined, suggesting a significant decrease in atmospheric oxygen content after a major oxidation event.
PHYSICS AND CHEMISTRY OF MINERALS
(2023)
Article
Geosciences, Multidisciplinary
Siba Sundar Sahu, Sarada P. Mohanty
Summary: Morphometric analysis of the Wagad Highland in the Kachchh province of India revealed three major orientations of regional fractures. The intensity of neotectonic activity decreases from Class 1 to Class 4, with about 62% of the total area falling into Class 1 and Class 2, especially in the western part of the study area. A major NE-SW lineament passing through the center of the study area was identified as being more neotectonically active based on these classes.
JOURNAL OF EARTH SYSTEM SCIENCE
(2021)
Article
Geochemistry & Geophysics
S. Nath, R. S. Chatterjee, S. P. Mohanty, A. Sharma, A. Prasad
Summary: This study used remote sensing data and topographic data to extract lineaments in the Himalayan region, and determined the principal stress directions in different structural domains based on angular distribution and internal friction angles. The study showed good agreement between the directions of maximum principal stress derived from minor lineaments and GPS data, but significant deviations were found in structural domains affected by post-thrusting strike-slip fault tectonics when comparing major and minor lineaments based principal stress directions.
Article
Geosciences, Multidisciplinary
Haifeng Chen, Hao Zou, M. Santosh, Huawen Cao, Franco Pirajno, Changcheng Huang, Mingcai Hou
Summary: Researchers have identified a supervolcano eruption event in the tuff layers from the Early-Middle Triassic boundary in the Yangtze Block. This eruption may have contributed to the delayed biotic recovery after the end-Permian mass extinction.
GEOSCIENCE FRONTIERS
(2024)
Article
Geosciences, Multidisciplinary
Yanjuan Yin, Baohua Zhang, Xinzhuan Guo
Summary: This study determines the Fe-Mn interdiffusion rates in natural Mn-bearing garnet crystals with 750 ppm H2O using an experimental approach. The results show that the Fe-Mn interdiffusion coefficient slightly decreases with increasing Fe content, and water significantly enhances the Fe-Mn interdiffusion in garnet. These findings suggest that the time required for homogenization of the compositional zoning of a garnet is much shorter than previously thought.
GEOSCIENCE FRONTIERS
(2024)
Article
Geosciences, Multidisciplinary
Yirang Jang, Sung Won Kim, Vinod O. Samuel, Sanghoon Kwon, Seung-Ik Park, M. Santosh, Keewook Yi
Summary: Detrital zircon geochronology and Hf isotope analysis are used to infer provenance characteristics and evaluate the tectonic evolution of sedimentary basins. The results of this study show that the Paleozoic sequences of the Okcheon Belt have a diverse provenance linked to different tectonic environments.
GEOSCIENCE FRONTIERS
(2024)
Article
Geosciences, Multidisciplinary
Stephen F. Foley, Isra S. Ezad
Summary: This study investigates the trace element compositions of melts and minerals from hydrous pyroxenites containing K-richterite through high-pressure experiments. The results show that different minerals play different roles in the enrichment of various trace elements. The study also models the isotopic aging process in hydrous pyroxenite source rocks.
GEOSCIENCE FRONTIERS
(2024)
Article
Geosciences, Multidisciplinary
G. Harshitha, C. Manikyamba, M. Santosh, Cheng-Xue Yang, A. Keshav Krishna, V. V. Sesha Sai, I. Panduranga Reddy
Summary: The early Archean oceans underwent significant redox changes that had a lasting impact on the Earth's biosphere. This study investigates the geochemical characteristics of Archean Mnformations in southern India and reveals the importance of these sedimentary deposits in understanding the ancient redox conditions and sedimentation patterns. The findings suggest that the sediments were deposited in shallow to deeper shelf environments in the Archean proto-ocean, and they provide evidence of regional episodes of ocean oxygenation prior to the Great Oxygenation Event.
GEOSCIENCE FRONTIERS
(2024)