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
Geochemistry & Geophysics
Xubin Wang, Lin Dong, Tong Li, Ziyi Wang, Changhu Zhang, Zhijun Jin, Jinhua Fu, Rukai Zhu, Kun Ling, Tianyu Wang
Summary: The alteration of carbonate caused by organic acid release during hydrocarbon generation is often overlooked in carbonate chemistry. However, in carbonate-deficient black shales, active hydrocarbon generation can dissolve original minerals and cause alteration, which can be studied at a microscale to understand burial diagenesis and its geochemical effects.
Article
Geosciences, Multidisciplinary
Miquela Ingalls, Kathryn E. Snell
Summary: Carbonates are prevalent in the geological record and offer stable isotope-based proxies for ancient climatic conditions and environmental histories. A hierarchical suite of techniques is proposed to comprehensively assess alterations in carbonates and identify preserved textures containing valuable environmental information. These techniques include optical and cathodoluminescence microscopy, secondary ionization mass spectrometry (SIMS), PIC mapping, and other technologies for distinguishing primary and altered fabric at finer spatial resolutions.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geology
David Jaramillo-Vogel, Juan Carlos Braga, Haileyesus Alemu Negga, Torsten Vennemann, Eva De Boever, Jean -Charles Schaegis, Valentin Rime, Balemwal Atnafu, Tesfaye Kidane, Anneleen Foubert
Summary: Fibrous aragonite crusts in the Danakil Depression underwent destructive diagenesis, resulting in secondary textures that mimic micritic and grumous (peloidal and clotted) textures associated with sparry microfabrics. The process involved the dissolution of aragonite crystals and subsequent filling of porosity with calcite. Stable C- and O-isotope compositions indicate the influence of meteoric and evaporative fluids. These findings challenge the interpretation of certain textures as primary microbial precipitates in ancient microbialites, suggesting they may be diagenetic products instead, although microbial processes and/or organic matter degradation may have been involved in the diagenetic process.
SEDIMENTARY GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Scott D. Midgley, Dominik Fleitmann, Ricardo Grau-Crespo
Summary: The presence of bromine as a trace-element in calcium carbonate speleothems is a useful proxy for past volcanic activity. However, the chemical nature of bromine-containing impurities in speleothems is not well-understood, which hinders the interpretation of experimental measurements. A computer simulation study based on quantum mechanical calculations was conducted to investigate the incorporation of bromine in calcium carbonate polymorphs. The study discusses the distribution of bromate oxyanions and charge-compensating cations and predicts their stability and solubility limits.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geosciences, Multidisciplinary
Jihad Hamd, Adrian Cerepi, Rudy Swennen, Corinne Loisy, Serge Galaup, Lea Pigot
Summary: This paper studies the sedimentary and diagenetic factors controlling the heterogeneity and petrophysical properties of carbonate reservoir systems. The research findings show that diagenetic processes such as dolomitization play a crucial role in the development of porosity and permeability in reservoir rocks.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Y. Ge
Summary: Extensive early marine cementation at the seafloor has important environmental implications and its driving factors are still controversial. This study investigates multiple factors involved in early marine cementation based on analysis of the Abu Dhabi coastal area in the Persian Gulf. The results suggest that factors such as CaCO3 saturation, saturation gradient, higher sea level, and the formation of shallow redox boundary contribute to extensive early marine cementation.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
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)
Review
Ecology
Jess F. Adkins, John D. Naviaux, Adam V. Subhas, Sijia Dong, William M. Berelson
Summary: The dissolution of CaCO3 minerals in the ocean is a fundamental aspect of marine alkalinity and carbon cycling, but there is still disagreement regarding the relationship between dissolution rate and mineral saturation state. While freshwater dissolution of calcite has been well studied, a unified understanding of carbonate dissolution in the ocean is lacking, with disagreements between laboratory and field studies. This review proposes a new framework that considers surface energetics and seawater speciation to explain recent data and historical features.
ANNUAL REVIEW OF MARINE SCIENCE, VOL 13, 2021
(2021)
Article
Geochemistry & Geophysics
James F. Busch, Eben B. Hodgin, Anne-Sofie C. Ahm, Jon M. Husson, Francis A. Macdonald, Kristin D. Bergmann, John A. Higgins, Justin V. Strauss
Summary: Studying various localities, it was found that Shuram CIE successions share general similarities but differences in water depths may be linked to changes in carbonate diagenesis. The magnitude and duration of the transgression associated with the Shuram CIE are consistent with eustatic fluctuations driven by plate reorganization.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
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
Engineering, Environmental
Mengmeng Sun, Hui Jin, Xiaofu Guo, Shizhao Wang, Jingtao Bi, Zhiyong Ji, Yingying Zhao
Summary: This study aims to achieve the high-value application of calcium during seawater decalcification. Aragonite or vaterite with a high purity exceeding 99% was successfully synthesized using synthetic seawater as a calcium source and Na2CO3/NaHCO3 solution as the carbonate supplier. The effects of coexisting ions in synthetic seawater on crystal polymorph and crystallization kinetics were systematically investigated, and it was found that the presence of Mg2+, K+ or SO42- favored the precipitation of aragonite while Mg-free synthetic seawater favored the formation of vaterite. Additionally, hydrophobic spherical vaterite particles were prepared by in-situ surface modification using alka-nolamide 6502 as a surfactant, demonstrating a promising approach to enhance the utilization of calcium during the seawater decalcification process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Yao-Wen Yeh, Sobhit Singh, Guangming Cheng, Nan Yao, Karin M. Rabe, David Vanderbilt, Philip E. Batson, Long Pan, Guofeng Xu, Shiyou Xu
Summary: In this study, the bonding state of calcium carbonate, a crucial building component in organisms, specifically the polymorphs calcite and aragonite, was characterized using valence (low-loss) electron energy loss spectroscopy. The difference in the Ca M23 edge, originating from 3p to 3d states, was found to align with the changes in Ca-O bonds in the two polymorphs. Surprisingly, the measured Ca M23 edge demonstrated qualitative agreement with the calculated partial density of states (PDOS) of Ca-d states, in contrast to the L edges (from 2p to 3d states) heavily influenced by atomic multiplet effect (spin-orbit coupling). These findings indicate that PDOS could potentially be utilized in interpreting the M23 edge of lighter 3d transition metals.
Article
Construction & Building Technology
Diandian Zhao, Jonah M. Williams, Ah-Hyung Alissa Park, Shiho Kawashima
Summary: In this research, all three forms of calcium carbonate (calcite, aragonite, and vaterite) were synthesized and their effects on cement rheology were studied. It was found that aragonite increased the yield stress and storage modulus of cement pastes, while calcite and vaterite did not. The mechanisms underlying these changes were discussed, including geometric features, hydration kinetics, and surface charge.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Diandian Zhao, Jonah M. Williams, Zhanzhao Li, Ah-Hyung Alissa Park, Aleksandra Radli, Pengkun Hou, Shiho Kawashima
Summary: Three anhydrous calcium carbonate polymorphs (calcite, aragonite, and vaterite) were synthesized and characterized in this study. The effects of these polymorphs on cement pastes, including compressive strength, hydration kinetics, and phase compositions, were investigated. The results showed that aragonite and vaterite remained stable in the cement systems even after a prolonged age, which had implications for their use in cement systems depending on the intended applications.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Rene Hoffmann, Sylvia Riechelmann, Kathleen A. Ritterbush, Jennifer Koelen, Nathalie Luebke, Michael M. Joachimski, Jens Lehmann, Adrian Immenhauser
Article
Geochemistry & Geophysics
C. Garbelli, S. Z. Shen, A. Immenhauser, U. Brand, D. Buhl, W. Q. Wang, H. Zhang, G. R. Shi
EARTH AND PLANETARY SCIENCE LETTERS
(2019)
Article
Geosciences, Multidisciplinary
Sylvia Riechelmann, Sebastian F. M. Breitenbach, Andrea Schroeder-Ritzrau, Augusto Mangini, Adrian Immenhauser
JOURNAL OF CAVE AND KARST STUDIES
(2019)
Article
Geology
Mathias Mueller, Onyedika A. Igbokwe, Benjamin Walter, Chelsea L. Pederson, Sylvia Riechelmann, Detlev K. Richter, Richard Albert, Axel Gerdes, Dieter Buhl, Rolf D. Neuser, Giovanni Bertotti, Adrian Immenhauser
Article
Geochemistry & Geophysics
Jasper A. Wassenburg, Sylvia Riechelmann, Andrea Schroeder-Ritzrau, Dana F. C. Riechelmann, Detlev K. Richter, Adrian Immenhauser, Mihai Terente, Silviu Constantin, Andrea Hachenberg, Maximilian Hansen, Denis Scholz
GEOCHIMICA ET COSMOCHIMICA ACTA
(2020)
Article
Geosciences, Multidisciplinary
Yongjie Hu, Chunfang Cai, Chelsea L. Pederson, Dawei Liu, Lei Jiang, Xunyun He, Shuyuan Shi, Adrian Immenhauser
PRECAMBRIAN RESEARCH
(2020)
Article
Geology
Yongjie Hu, Chunfang Cai, Dawei Liu, Chelsea L. Pederson, Lei Jiang, Anjiang Shen, Adrian Immenhauser
Article
Geology
Yuzhu Ge, Chelsea L. Pederson, Stephen W. Lokier, Jan P. Traas, Gernot Nehrke, Rolf D. Neuser, Katja E. Goetschl, Adrian Immenhauser
Article
Environmental Sciences
T. Treude, S. Krause, L. Steinle, E. Burwicz, L. J. Hamdan, H. Niemann, T. Feseker, V Liebetrau, S. Krastel, C. Berndt
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Yuzhu Ge, Stephen W. Lokier, Rene Hoffmann, Chelsea L. Pederson, Rolf D. Neuser, Adrian Immenhauser
Article
Multidisciplinary Sciences
Verena B. Heuer, Fumio Inagaki, Yuki Morono, Yusuke Kubo, Arthur J. Spivack, Bernhard Viehweger, Tina Treude, Felix Beulig, Florence Schubotz, Satoshi Tonai, Stephen A. Bowden, Margaret Cramm, Susann Henkel, Takehiro Hirose, Kira Homola, Tatsuhiko Hoshino, Akira Ijiri, Hiroyuki Imachi, Nana Kamiya, Masanori Kaneko, Lorenzo Lagostina, Hayley Manners, Harry-Luke Mcclelland, Kyle Metcalfe, Natsumi Okutsu, Donald Pan, Maija J. Raudsepp, Justine Sauvage, Man-Yin Tsang, David T. Wang, Emily Whitaker, Yuzuru Yamamoto, Kiho Yang, Lena Maeda, Rishi R. Adhikari, Clemens Glombitza, Yohei Hamada, Jens Kallmeyer, Jenny Wendt, Lars Woermer, Yasuhiro Yamada, Masataka Kinoshita, Kai-Uwe Hinrichs
Article
Limnology
Tina Treude, Leila J. Hamdan, Sydnie Lemieux, Andrew W. Dale, Stefan Sommer
Summary: The sulfide-spiking method can be used to accurately determine bacterial sulfate reduction rates, especially in sediments with low sulfide concentrations and high sulfur cycling. Adding unlabeled sulfide to sediments can prevent the recycling of radiotracers, resulting in more precise measurements of sulfate reduction rates.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Geosciences, Multidisciplinary
S. F. A. Jordan, U. Grawe, T. Treude, E. M. Lee, J. Schneider von Deimling, G. Rehder, O. Schmale
Summary: Cold seeps are hot spots of seabed-derived methane emissions to the water column, with physical and biological barriers regulating methane transport to the atmosphere. Methane-oxidizing bacteria (MOB) are ejected into the water column from the seep site by sediment resuspension and gas-bubble-mediated transport, accelerating methane oxidation rates. Particle-tracking models show that tides control the distribution of methane and methanotrophs released by the seep site, impacting pelagic methane sink.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Alexander Hueter, Stefan Huck, Stephane Bodin, Ulrich Heimhofer, Stefan Weyer, Klaus P. Jochum, Adrian Immenhauser
CLIMATE OF THE PAST
(2019)
Article
Ecology
Jeremy McCormack, Finn Viehberg, Derya Akdemir, Adrian Immenhauser, Ola Kwiecien