Article
Geochemistry & Geophysics
Frantz Ossa Ossa, Jorge E. Spangenberg, Andrey Bekker, Stephan Koenig, Eva E. Stueken, Axel Hofmann, Simon W. Poulton, Aierken Yierpan, Maria Varas-Reus, Benjamin Eickmann, Morten B. Andersen, Ronny Schoenberg
Summary: This study investigates the marine shales deposited during the Lomagundi Event in the Paleoproterozoic era, providing evidence for a highly productive and well-oxygenated photic zone. However, a subsequent deoxygenation of the atmosphere-ocean system led to enhanced denitrification and reduction of selenium oxyanions. The findings suggest that oxygen levels in the atmosphere-ocean system during this period were much lower than modern concentrations.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
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
Shuan-Hong Zhang, Hong-Yu Wang, Hao-Shu Tang, Yu-Hang Cai, Ling-Hao Kong, Jun-Ling Pei, Qi-Qi Zhang, Guo-Hui Hu, Yue Zhao
Summary: The newly confirmed Palaeoproterozoic successions in the Fanhe Basin of the North China Craton (NCC) contain carbonates with high positive carbon isotope excursion, indicating the presence of the Lomagundi-Jatuli Event (LJE) in the NCC. The carbonates deposited before 2.06 Ga have positive carbon isotope, while those deposited after have normal carbon isotope. The carbonates from the Daposhan Formation have the largest positive carbon isotope excursion in the NCC. The carbon isotope values of the carbonates in the Fanhe Basin exhibit a decreasing trend from approximately 2.20 Ga to 2.06 Ga, similar to contemporaneously deposited carbonates in other cratons.
Article
Geosciences, Multidisciplinary
Yu-Hang Cai, Shuan-Hong Zhang, Yue Zhao, Guo-Hui Hu, Qi-Qi Zhang, Jun-Ling Pei
Summary: This study provides solid evidence of weakly metamorphosed stratigraphic records of the Great Oxidation Event (GOE) and Lomagundi-Jatuli Event (LJE) in the lower part of the Fanhe Group in the North China Craton (NCC). New age constraints from dating techniques confirm the importance of this area in understanding global environmental changes in Earth's history.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Mojtaba Fakhraee, Lidya G. Tarhan, Christopher T. Reinhard, Sean A. Crowe, Timothy W. Lyons, Noah J. Planavsky
Summary: The availability of molecular oxygen greatly influences the size and structure of Earth's biosphere. An exception to low oxygen concentrations in Earth's history occurred between 2.3 billion and 2.0 billion years ago, which led to significant changes in global biogeochemical cycles. The reasons for this rise and subsequent fall in atmospheric oxygen levels, as well as its impact on marine biogeochemical cycling and the emergence of eukaryotic life, remain underexplored.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Yihe Li, Madhusoodhan Satish-Kumar, Sasidharan Kiran, Chuanhui Wan, Jianping Zheng
Summary: The Lomagundi (-Jatuli) event, which occurred approximately 2.2 billion years ago, is significant for understanding the causes and consequences of the great oxygenation event, carbon storage and sequestration on Earth's surface, evolution of life, and the influence of tectonic activities on the environment. This study reports the discovery of meta-carbonate rocks with distinct positive carbon isotopic excursion from the Paleoproterozoic continental collision zone of the Kongling Complex in South China Craton. The findings suggest that the burial of 12C-enriched organic carbon during the oceanic closure resulted in the global enrichment of 13C in atmospheric CO2, recorded in marine carbonate rocks. The study also highlights the role of orogenesis in carbon sequestration into the continental crust.
GEOSCIENCE FRONTIERS
(2022)
Article
Geosciences, Multidisciplinary
Peng Peng, Xu Liu, Lianjun Feng, Xiqiang Zhou, Hongwei Kuang, Yongqing Liu, Jianli Kang, Xinping Wang, Chong Wang, Ke Dai, Huichu Wang, Jianrong Li, Peisen Miao, Jinghui Guo, Mingguo Zhai
Summary: This study investigates and reviews the strata and igneous suites in the eastern North China craton during the late stage of the Great Oxidation Event (GOE) known as the Lomagundi-Jatuli event (LJE). The results show that the LJE-traced strata span approximately 200 Ma and are correlated with the emplacement of large igneous provinces (LIPs) during a global LIP peak. These LIPs contribute to the accumulation of organic matters in sediments and the oxygenation of the atmosphere through subaqueous-extrusions and nutrient elements' input. The termination of the GOE-LJE is associated with the emergence of subduction systems and orogenic processes.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Don E. Canfield
Summary: The study investigates the activity level and ecology of the ancient biosphere by analyzing the isotopic composition of organic and inorganic carbon in ancient rocks. The model suggests that before the Great Oxidation Event, the burial rates of organic matter in marine sediments were lower, indicating a potentially subdued biosphere activity level.
AMERICAN JOURNAL OF SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
A. R. Prave, K. Kirsimae, A. Lepland, A. E. Fallick, T. Kreitsmann, Yu E. Deines, A. E. Romashkin, D. Rychanchik, P. Medvedev, M. Moussavou, K. Bakakas, M. S. W. Hodgskiss
Summary: The study suggests that the C-13 isotope trend of the LJE is facies-dependent rather than representative of the global carbon cycle. While open and deeper marine environments maintained stable carbon isotope values, nearshore and evaporitic environments showed higher C-13 values. Changes in C-13 values are linked to facies changes and may be related to local carbon pools.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Alexander J. Krause, Benjamin J. W. Mills, Andrew S. Merdith, Timothy M. Lenton, Simon W. Poulton
Summary: Mapping the history of atmospheric O-2 during the late Precambrian is crucial for understanding the potential connections to animal evolution. This study presents a quantitative reconstruction of atmospheric O-2 levels over the past 1.5 billion years, revealing oscillations between 1% and 50% of present atmospheric levels during the Neoproterozoic period. The findings suggest a complex oxygenation event and extreme variability, against which the first animals evolved.
Article
Geochemistry & Geophysics
Simin Jin, David B. Kemp, David W. Jolley, Manuel Vieira, James C. Zachos, Chunju Huang, Mingsong Li, Wenhan Chen
Summary: This study uncovers the impacts of extreme climate warming on sedimentary systems, revealing large-scale changes in sediment supply during the PETM and the importance of astronomical climate forcing in mediating these factors over long timescales.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
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
Geosciences, Multidisciplinary
N. Mammone, A. Bekker, K. Chamberlain, A. B. Kuznetsov
Summary: This study compares the lithostratigraphy and zircon ages of rock formations on the Wyoming and Superior cratons and finds similar geological records and zircon age patterns, supporting the hypothesis that they were adjacent in the early Paleoproterozoic. The study also reveals a series of rift-related mafic magmatism on the southern margin of the Wyoming craton around 2.45 billion years ago, which is related to geological activity on the Superior craton.
PRECAMBRIAN RESEARCH
(2022)
Article
Geography, Physical
Xiaohua Teng, Chunlian Wang, Chenglin Liu, Kai Yan, Zeng Luo
Summary: This study presents a detailed record of the Paleocene-Eocene Thermal Maximum (PETM) in the Jianghan Basin, central China, showing significantly increased precipitation and a wetter climate during the PETM, along with rapid shifts between wet and dry climatic conditions in an overall arid climate after the PETM.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geosciences, Multidisciplinary
Yunfeng Wang, Frantz Ossa Ossa, Jorge E. Spangenberg, Martin Wille, Ronny Schoenberg
Summary: The study suggests that the Toarcian carbon isotope excursion (T-CIE) found on the northern European epicontinental shelf may not be suitable for reconstructing the global ocean redox structure, as the nitrogen isotope values contradict typical sedimentary values. It introduces the possibility of local oxygen-deficient basins on the northern European shelf and stresses the need for comprehensive investigations to validate the existence of a global OAE.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)