Article
Geosciences, Multidisciplinary
Hilary Corlett, David Hodgetts, Jesal Hirani, Atle Rotevatn, Rochelle Taylor, Cathy Hollis
Summary: Constructing geocellular models of carbonate rocks is challenging due to the unpredictable distribution of rock properties and strong influence of diagenetic processes. This study successfully created a geocellular model using integrated sedimentological, petrophysical, diagenetic, and structural information, demonstrating a workflow for accurately representing flow controlling facies and diagenetically altered poroperm and fracture networks.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Adhipa Herlambang, Ardiansyah I. Koeshidayatullah, Abduljamiu O. Amao, Abdulwahab M. Bello, Faisal Al-Ghamdi, Muhammad H. Malik, Khalid A. H. Al-Ramadan
Summary: This study integrates fracture and multiproxy geochemical analyses to elucidate the origin and timing of fluid flows and diagenetic processes in the Umm Luj Basin of the Red Sea. The results reveal two distinct fluid members and tectonic events, providing new insights into the paleo-fluid circulation related to tectonic events.
FRONTIERS IN EARTH SCIENCE
(2022)
Review
Geosciences, Multidisciplinary
Meng Cheng, Zihu Zhang, Thomas J. Algeo, Shuliang Liu, Xiaodan Liu, Haiyang Wang, Biao Chang, Chengsheng Jin, Wen Pan, Mengchun Cao, Chao Li
Summary: The seawater chemistry of the Cryogenian Nanhua Basin was significantly influenced by the fluxes of freshwater and seawater, with black shale deposition associated with low salinity and Mn-carbonate deposition linked to higher salinity. During anoxic depositional intervals, enhanced decay of organic matter led to C-12-enriched dissolved inorganic carbon precipitating in Mn-carbonates.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Mohammed S. Hashim, Stephen E. Kaczmarek
Summary: The presence of magnesium in natural waters can strongly inhibit calcite precipitation and the transformation of aragonite to calcite. The rate at which aragonite stabilizes to calcite increases with lower fluid:solid ratios. Increases in fluid:solid ratio also lead to greater incorporation of magnesium into calcite products, suggesting that fluid:solid ratio is an important factor in carbonate diagenesis.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geology
Lei Jiang, Anjiang Shen, Zichen Wang, Anping Hu, Yongsheng Wang, Xianying Luo, Feng Liang, Karem Azmy, Liyin Pan
Summary: This article examines different types of dolomite from three Neoproterozoic dolostone profiles in China and proposes a diagenetic model explaining the decrease in iron and manganese concentrations during dolomitization. The study questions the use of widespread Neoproterozoic fibrous dolomite cements in paleoclimate reconstruction and as evidence for the "dolomite sea" hypothesis.
Article
Geochemistry & Geophysics
Jack G. Murphy, Anne-Sofie C. Ahm, Peter K. Swart, John A. Higgins
Summary: The records of lithium isotopic composition in seawater preserved in shallow-marine carbonate sediments are valuable for studying the links between silicate weathering, clay formation, global carbon cycle, and Earth's climate over geological time. This study presents measurements of lithium isotopic composition in Neogene shallow-marine carbonates and demonstrates the effects of mineralogy and diagenetic alteration on the variability of bulk sediment δ Li-7 values. The findings suggest that robust 'snapshots' of seawater δ Li-7 values in the past can be obtained from shallow-water marine carbonate sediments.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geosciences, Multidisciplinary
Hao Kuang, Zhenxing Mao, Xiaojing Zhuo, Mengkang Li, Chao Liu
Summary: The dolomites in the upper section of the Chihsia Formation in South China have been a mystery, restricting further understanding of depositional and diagenetic fluids and hydrocarbon prediction. This study classified dolomites into three types based on crystal sizes and analyzed their geochemical proxies. The results revealed the origin and formation processes of different dolomite types, providing new clues for the understanding of dolomitizing fluids in the Chihsia Formation.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Multidisciplinary Sciences
Elizabeth M. Bullard, Ivan Torres, Tianqi Ren, Olivia A. Graeve, Kaustuv Roy
Summary: This study indicates that under 60 years of ocean warming and acidification, the shell mineralogy of the California mussel has undergone significant changes, with an increase in shell calcite and a decrease in aragonite content. The results suggest that ocean pH and saturation state play a strong role in mediating the shell mineralogy of this species, highlighting long-term changes in response to ocean acidification.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Environmental Sciences
Ariel K. Pezner, Travis A. Courtney, Heather N. Page, Sarah N. Giddings, Cory M. Beatty, Michael D. DeGrandpre, Andreas J. Andersson
Summary: Spatial and temporal carbonate chemistry variability on coral reefs is influenced by a combination of seawater hydrodynamics, geomorphology, and biogeochemical processes, with their relative impacts differing by site. Lateral variability in carbonate chemistry parameters was found to be larger than vertical variability, and this variability was observed in conjunction with depth gradients, although it varied between sampling events depending on factors such as time of day and current flow modifications.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geology
Mathias Mueller, Carl Jacquemyn, Benjamin F. Walter, Chelsea L. Pederson, Simon L. Schurr, Onyedika A. Igbokwe, Niels Joens, Sylvia Riechelmann, Martin Dietzel, Harald Strauss, Adrian Immenhauser
Summary: This study evaluates spatial and temporal gradients in processes and products related to contact metamorphism, dolomitization, and dedolomitization of marine limestones in the Middle Triassic Latemar isolated platform in the northern Italian Dolomite Mountains. It sheds light on extreme textural and geochemical complexity through detailed analysis of petrography, fluid inclusion analysis, delta C-13 and delta O-18 data, and Sr-87/Sr-86 isotope ratios. These results are relevant for understanding alteration products ranging from high-grade metamorphic overprint to moderately altered limestones along vertical gradients, as well as the conservative marine delta C-13 and delta O-18 values in both marbles and low-temperature hydrothermal dolomites.
Article
Geosciences, Multidisciplinary
Clayton D. Schultz, Michael H. Hofman
Summary: Diagenesis strongly influences the porosity and permeability of sediments, with the thickness of shale members identified as the primary control on the distribution of diagenetic minerals. Structural features are locally important, while depositional facies have minimal impact on diagenetic alterations.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Ophelie Pascault, Christophe Durlet, Pierre-Alexandre Teboul, Maxime Ducoux, Jean-Pierre Girard, Aurelien Virgone, Thomas Saucede
Summary: This article investigates the Larrano igneous body contemporaneous with the Urgonian limestones in the Duranguesado platform. The study combines morpho-structural, diagenetic, geochemical, and sedimentological approaches to explore the impacts of the magmatic events on the surrounding carbonate sediments. The results reveal the basaltic magma rising along normal faults and forming early diagenetic phases, indicating thermal shock and warm seawater circulation during and after the intrusion.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Environmental Sciences
Madi O'Brien, Catia Freitas, Paul Venzo, Prue Francis
Summary: Despite a lack of formal education systems fostering ocean literacy, informal marine education programs are filling the gap, offering immersive learning experiences connected to the marine environment. This study examines marine education programs in Australia's temperate region and evaluates their adherence to ocean literacy principles outlined in the national curriculum. Findings indicate a strong familiarity with ocean literacy principles among participants, with half of the informal providers incorporating these principles into their programs. The study highlights the importance of formal and informal education programs working together to improve school curricula and promote ocean literacy.
MARINE POLLUTION BULLETIN
(2023)
Article
Geosciences, Multidisciplinary
Geoffrey Motte, Guilhem Hoareau, Jean-Paul Callot, Sidonie Revillon, Francesca Piccoli, Sylvain Calassou, Eric C. Gaucher
Summary: This study investigates the dolomitization processes in the Meillon and Mano Formations in the northwestern Pyrenees using a variety of methods. Early dolomitization stages were likely triggered by the influx of marine waters, while later stages may be associated with faults and volcanic intrusions.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geography, Physical
Dongfang Zhao, Xiucheng Tan, Guang Hu, Lichao Wang, Xiaofang Wang, Zhanfeng Qiao, Sicong Luo, Hao Tang
Summary: The study identified four types of fibrous dolomite cement in the terminal Ediacaran Dengying Formation of South China through optical characteristics, suggesting different origins and possible implications in paleoceanography. More research is needed to further understand the formation mechanisms and significance of these cements in reconstructing ancient seawater chemistry.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geography, Physical
Ashleigh van Smeerdijk Hood, Malcolm William Wallace
GLOBAL AND PLANETARY CHANGE
(2018)
Article
Geosciences, Multidisciplinary
Maxwell Alexander Lechte, Malcolm William Wallace, Ashleigh van Smeerdijk Hood, Noah Planavsky
PRECAMBRIAN RESEARCH
(2018)
Article
Geology
Alice Mary Shuster, Malcolm William Wallace, Ashleigh van Smeerdijk Hood, Ganqing Jiang
SEDIMENTARY GEOLOGY
(2018)
Article
Geology
Malcolm W. Wallace, Ashleigh van S. Hood
SEDIMENTARY GEOLOGY
(2018)
Article
Geosciences, Multidisciplinary
Eric J. Bellefroid, Noah J. Planavsky, Ashleigh V. S. Hood, Galen P. Halverson, Kasparas Spokas
AMERICAN JOURNAL OF SCIENCE
(2019)
Article
Geochemistry & Geophysics
Guang-Yi Wei, Ashleigh V. S. Hood, Xi Chen, Da Li, Wei Wei, Bin Wen, Zheng Gong, Tao Yang, Zhao-Feng Zhang, Hong-Fei Ling
EARTH AND PLANETARY SCIENCE LETTERS
(2019)
Editorial Material
Geology
Lidya G. Tarhan, Ashleigh van S. Hood, Mary L. Droser, James G. Gehling, Derek E. G. Briggs, Robert R. Gaines, Leslie J. Robbins, Noah J. Planavsky
Article
Geosciences, Multidisciplinary
Malcolm W. Wallace, Ashleigh V. S. Hood, Joe Fayle, Emily S. Hordern, Tessa F. O'Hare
PRECAMBRIAN RESEARCH
(2019)
Article
Geography, Physical
L. M. E. Percival, D. P. G. Bond, M. Rakocinski, L. Marynowski, A. V. S. Hood, T. Adatte, J. E. Spangenberg, K. B. Foellmi
GLOBAL AND PLANETARY CHANGE
(2020)
Article
Multidisciplinary Sciences
Maxwell A. Lechte, Malcolm W. Wallace, Ashleigh van Smeerdijk Hood, Weiqiang Li, Ganqing Jiang, Galen P. Halverson, Dan Asael, Stephanie L. McColl, Noah J. Planavsky
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2019)
Article
Geochemistry & Geophysics
Mingyu Zhao, Lidya G. Tarhan, Yiyue Zhang, Ashleigh Hood, Dan Asael, R. Pamela Reid, Noah J. Planaysky
Summary: Carbonate zinc isotopes are increasingly used to track changes in seawater zinc isotopic composition. Recent studies, particularly under the GEOTRACES program, have expanded our understanding of zinc behavior in the water column. However, the incorporation of water-column zinc isotopic signals into carbonate sediments is still at an early stage.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Biology
Ashleigh V. S. Hood, Donald E. Penman, Maxwell A. Lechte, Malcolm W. Wallace, Jonathan A. Giddings, Noah J. Planavsky
Summary: The 'snowball Earth' hypothesis proposes that two intense glaciations occurred in the Neoproterozoic around 717-635 million years ago, impacting biogeochemical cycles. However, evidence from the Sturtian glaciation suggests continued carbonate precipitation and magnesium cycling, challenging previous assumptions. This may explain the extreme duration of the Sturtian glaciation.
Article
Biology
Brennan O'Connell, Malcolm W. Wallace, Ashleigh v. S. Hood, Luke Rebbechi, Hannah L. Brooks
Summary: Stromatolites and microbialites contain valuable environmental and biological information, with deep water cuspate stromatolites being formed in deep water settings during maximum transgression, likely requiring low light and low oxygen conditions for microbial metabolism. The link between cuspate morphology and physical/chemical conditions of Precambrian deep water marine settings is suggested by the origin of cuspate stromatolites from the Trezona Formation and other Precambrian formations.