Article
Geosciences, Multidisciplinary
Philippine Rutman, Guilhem Hoareau, Jean-Michel Kluska, Alain Lejay, Claire Fialips, Francois Gelin, Charles Aubourg, Eider Hernandez Bilbao
Summary: Vaca Muerta is a marine source rock with great petroleum potential, containing natural fractures filled with fibrous calcite, concretions, and ash beds. An exhaustive diagenetic study of the ash beds was conducted, revealing two facies with complex alterations, both displaying a well-marked calc-alkaline magmatic signature. The clay-rich ash beds are characterized by illite/smectite assemblage, while the calcite-cemented ones consist of argillitized glass shards and pumice fragments cemented by calcite.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Navot Morag, Ofra Klein-Ben David, Amir Sandler
Summary: A thick sequence of arkosic sandstones and conglomerates, along with volcanic rocks, were deposited in the northern Arabian-Nubian Shield during the late Neoproterozoic Ediacaran period. The study of these sediments in southern Israel provides insights into their depositional environments and diagenetic processes. The composition of trace elements and clay minerals in these sediments reveals their provenance and depositional history.
PRECAMBRIAN RESEARCH
(2022)
Article
Engineering, Environmental
Brian Rippey, Julie Campbell, Yvonne McElarney, James Thompson, Mary Gallagher
Summary: A simplified model was established and applied to estimate the timescale of recovery from long-term P release from sediment after a reduction in the external load in four lakes. The study found that the rate of P release and recovery time varies in different lakes, but generally takes between one and three decades.
Review
Geology
Adrian Immenhauser
Summary: This paper reviews the concepts, processes, and products that characterize the burial realm from the viewpoint of the carbonate geoscientist. It presents and discusses typical features of carbonate burial in different burial domains, from shallow to deep, and proposes improved conceptual delimitation and subdivision with intuitive terminology. The transition from shallow burial to deep-burial domains is described, including changes in fluid types, porosity evolution, and diagenetic fabrics.
DEPOSITIONAL RECORD
(2022)
Article
Geosciences, Multidisciplinary
Zhaolin Yang, Xinshe Liu, Xu Han, Hu Zhou, Sha Zhan, Xiaojun Gui, Jihong Niu, Ke Wang
Summary: This study investigates the periods of hydrothermal fluids involved in the formation of different types of dolomites in the Middle Ordovician Majiagou Formation in the southern Ordos Basin. The results reveal that different types of dolomites formed under different mechanisms, including the involvement of low-salinity meteoric water in the mixing zone, interactions between hydrothermal fluids and matrix carbonates, and the injection of high-temperature acid fluids associated with organic matter maturing. This study provides important insights for understanding the diagenetic process of reservoir dolostones in the Middle Ordovician in the Ordos Basin.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Multidisciplinary Sciences
Bowen Ling, Mo Sodwatana, Arjun Kohli, Cynthia M. Ross, Adam Jew, Anthony R. Kovscek, Ilenia Battiato
Summary: Mineral dissolution has significant impacts on geological systems, but current experimental techniques limit direct observation of dissolution reactions in spatially heterogeneous rocks. This study utilizes microfluidic cells and thin rock samples to visualize dissolution with high temporal resolution and large observation window. The dynamics of dissolution and changes in fracture interfaces are revealed through observation of microstructure variations in rocks. Additionally, a method for characterizing reactivity parameters of natural heterogeneous rocks is provided.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geology
Cathy Hollis, Aisha Al Hajri
Summary: There is a lack of consensus on the origin of fluids responsible for dissolution and the processes by which pores are generated in carbonate rocks. This study examines core data from oil fields in north Oman and provides evidence that dissolution occurred during orogenic uplift and telogenesis, explaining the formation of porosity along fractures and stylolites after lithification.
SEDIMENTARY GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Andreas Pauli de Castro, Carlos Conforti Ferreira Guedes, Fernando Farias Vesely, Deise Marli da Silveira, Lara Ferreira Neves
Summary: This study investigates the sedimentary provenance and its control on reservoir quality in the Maracangalha Formation. Petrography analysis and X-Ray Fluorescence data reveal a granite-gneissic terrain as the primary source area for quartz-feldspathic sandstones. The sources contribute recycled sedimentary and metasedimentary rocks, leading to the occurrence of specific litho and quartzose petrofacies. The mineral composition and primary texture of sandstones significantly influence diagenetic processes and the formation of secondary porosity. Understanding sedimentary provenance, composition, and diagenesis is crucial for predicting reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Tatiana Goldberg, Rick Hennekam, Laura Wasch, Gert-Jan Reichart, Oliver Rach, Jessica A. Stammeier, Jasper Griffioen
Summary: X-ray fluorescence Core Scanning (XCS) combined with Multivariate Log-ratio Calibration (MLC) approach shows comparability in environmental geochemical characterisation, allowing for the retrieval of elemental information and quantitative results.
APPLIED GEOCHEMISTRY
(2021)
Article
Geochemistry & Geophysics
J. T. Middleton, A. Paytan, M. Auro, M. A. Saito, T. J. Horner
Summary: The isotope composition of barium (Ba) in barite (BaSO4) is a powerful tool for tracing the cycles of pelagic Ba, carbon, and sulfur. This study analyzed the Ba isotope composition of porewaters and co-located BaSO4 in sediments from the Equatorial Pacific, and conducted laboratory experiments to assess the rates of Ba isotope alteration. The results suggest that ion exchange occurs in Equatorial Pacific sediments, and this process drives the observed Ba isotope offsets between pelagic BaSO4 and porewaters.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Shuguang Huang, Mingcai Hou, Anqing Chen, Shenglin Xu, Benjian Zhang, Yuwei Deng, Yu Yu
Summary: The Devonian dolomites of the Guanwushan Formation in the northwest of the Sichuan Basin are divided into three types based on petrological characteristics, showing different dolomitization processes influenced by environmental conditions and fluid composition. Multiple factors, including Rare Earth Element distribution, Sr isotopic ratios, and oxygen isotope values, support these interpretations.
Article
Geology
Ricardo Enrique Milian de la Cruz, Luigi Solari, Uwe Martens, Fanis Abdullin, Maria Isabel Sierra-Rojas
Summary: The petrography, geochronology, and geochemistry of the Chivillas Formation in the southern Sierra Madre Oriental, Mexico, indicate a local provenance from western basement sources. The study reveals the presence of different detrital populations and suggests that rivers from the Acatlan-Oaxacan block drained into the basin during the Early Cretaceous. Additionally, fission-track analysis indicates rapid exhumation of Chivillas rocks after the tectonic activity in the region.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Nikolay N. Kruk, Olga A. Gavryushkina, Sergey Z. Smirnov, Elena A. Kruk, Sergey N. Rudnev, Dina V. Semenova
Summary: This paper presents data on the geological position, geochemical features, main mineral composition (micas, feldspars), and melt and fluid inclusions in quartz from Aba high-silica leucocratic granitoids in the western part of the Talitsa batholith, Russian Altai. The granitoids are classified as S-type and formed via the partial melting of metasedimentary source rocks. The geochemical features indicate higher differentiation in the late leucocratic phase and the presence of coexisting syngenetic melt and fluid inclusions shows the volatile saturation of magmatic melts and magma degassing.
Article
Geosciences, Multidisciplinary
Abdulwahab Muhammad Bello, Dimitrios Charlaftis, Stuart J. J. Jones, Jon Gluyas, Sanem Acikalin, Matthieu Cartigny, Khalid Al-Ramadan
Summary: This study investigated the impact of chlorite and microquartz grain coatings on the overgrowth of quartz and feldspar. The experimental results showed that the volume of precursor chlorite plays a significant role in the formation of the coatings. The findings provide quantitative data for describing diagenetic changes in mesodiagenetic environments.
FRONTIERS IN EARTH SCIENCE
(2022)
Review
Geochemistry & Geophysics
Robert M. Hazen, Robert T. Downs, Shaunna M. Morrison, Benjamin M. Tutolo, David F. Blake, Thomas F. Bristow, Steve J. Chipera, Harry Y. Mcsween, Doug Ming, Richard V. Morris, Elizabeth B. Rampe, Michael T. Thorpe, Allan H. Treiman, Valerie M. Tu, David T. Vaniman
Summary: A systematic survey of 161 known and postulated minerals originating on Mars points to 20 different mineral-forming processes. The earliest martian minerals were primary phases from mafic igneous rocks and their ultramafic cumulates. Significant mineral diversification occurred via precipitation of primary phases from aqueous and atmospheric fluids. Evaluation: 8 out of 10.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Geology
Ravi Anand, Mel Lintern, Rob Hough, Ryan Noble, Mike Verrall, Walid Salama, Jens Balkau, Nigel Radford
Article
Geosciences, Multidisciplinary
Walid Salama, Ravi R. Anand
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2017)
Review
Geology
R. R. Anand, R. M. Hough, W. Salama, M. F. Aspandiar, C. R. M. Butt, I. Gonzalez-Alvarez, V. Metelka
ORE GEOLOGY REVIEWS
(2019)
Article
Geochemistry & Geophysics
Walid Salama, Ravi Anand, Anthony Morey, Lucas Williams
MINERALIUM DEPOSITA
(2019)
Article
Geology
I. Gonzalez-Alvarez, W. Salama, P. Hilliard, T. Ibrahimi, M. LeGras, O. Rondon-Gonzalez
ORE GEOLOGY REVIEWS
(2019)
Article
Geosciences, Multidisciplinary
C. J. Tiddy, S. M. Hill, D. Giles, B. G. van der Hoek, V. J. Normington, R. R. Anand, E. Baudet, K. Custance, R. Hill, A. Johnson, S. McLennan, C. Mitchell, D. Zivak, W. Salama, K. Stoate, K. Wolff
AUSTRALIAN JOURNAL OF EARTH SCIENCES
(2019)
Article
Geochemistry & Geophysics
Walid Salama, Ravi Anand, Malcolm Roberts, Raymond E. Smith
JOURNAL OF GEOCHEMICAL EXPLORATION
(2020)
Article
Geochemistry & Geophysics
Walid Salama, Ravi R. Anand, Louise Schoneveld, Jordan Rogers, Ryan R. P. Noble
Summary: This study investigates the landscape evolution, mineralogy and geochemistry of the least explored Yamarna Terrane in Western Australia. The findings show that the near surface ferruginous regolith can provide valuable insights for exploration of underground resources.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Geochemistry & Geophysics
Ravi R. Anand, Martin A. Wells, Melvyn J. Lintern, Louise Schoneveld, Martin Danisik, Walid Salama, Ryan R. P. Noble, Vasek Metelka, Nathan Reid
Summary: Ferruginous nodules and pisoliths formed in paleochannel sediments during the Miocene can be used to locate buried Au mineralization, with their appearance, mineralogy, and geochemistry varying according to their origin, making them useful for (U-Th)/He dating. Anomalous concentrations of elements in the cores and cortices of these nodules reflect underlying Au mineralization, serving as useful sample media for geochemical exploration in the area.
Article
Geochemistry & Geophysics
Walid Salama, Ravi R. Anand, Warrick Tunmer, Mehrooz Aspandiar
Summary: This study focused on the evolution, sedimentation processes, and characteristics of the least explored Yamarna Terrane in the Yilgarn Craton of Western Australia. The results showed that the Permian cover primarily originated from the Albany-Fraser Orogen, with geochemical features suggesting distal felsic source rocks rather than nearby mineralized mafic rocks.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Geochemistry & Geophysics
Walid Salama, Michael Verrall, Kirsty Culver, Ravi Anand
Summary: Thick Permian glacial cover in Western Australia poses challenges for mineral exploration in the northeast Yilgarn Craton, with areas under the cover presenting the greatest challenge. The Lancefield North gold prospect in the Duketon Greenstone Belt features Permian diamictites covering unweathered basalt hosting gold mineralization. The diamictites contain a variety of minerals and have stable characteristics under specific conditions.
Article
Geochemistry & Geophysics
Hassan Talebi, Jelena Markov, Walid Salama, Alex Otto, Vasek Metelka, Ravi Anand, Dave Cole
Summary: The aim of this study was to use high-resolution aeromagnetic data to target ferricrete units related to inset-valley systems. The predicted inset-valleys systems can confine the exploration space and define a new exploration frontier for ferricrete gold deposits.
Article
Anthropology
Mohamed A. Hamdan, Giulio Lucarini, Maria Cristina Tomassetti, Giuseppina Mutri, Walid Salama, Safiya M. Hassan, Barbara E. Barich
Summary: This article discusses the geological, mineralogical, and geochemical characteristics of pigments used in the Wadi Sura rock art in southwestern Egypt. It found that ancient artists extensively used inorganic clay-based pigment, with white pigments sourced from Silurian sandstone bedrock and red and yellow pigments from clay mixtures with iron oxide. The study also identified the presence of lazurite, a blue pigment never before seen in the geology of Egypt.
AFRICAN ARCHAEOLOGICAL REVIEW
(2021)
Article
Geosciences, Multidisciplinary
M. F. Gazley, L. C. Bonnett, L. A. Fisher, W. Salama, J. H. Price
AUSTRALIAN JOURNAL OF EARTH SCIENCES
(2017)