Article
Energy & Fuels
Detian Yan, Shuangjian Li, Haijiao Fu, David M. Jasper, Sandong Zhou, Xiangrong Yang, Bao Zhang, Hassan Nasir Mangi
Summary: The study indicates that the formation of Early Silurian organic-rich black shales on the Yangtze Platform is influenced by various factors, including biological, terrestrial, volcanic, and authigenic sources. The geochemical characteristics of these shales show influences from marine environments and volcanic ash deposition, demonstrating high marine productivity and organic matter enrichment.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Adam D. Jew, Jennifer L. Druhan, Matthias Ihme, Anthony R. Kovscek, Ilenia Battiato, John P. Kaszuba, John R. Bargar, Gordon E. Brown
Summary: This review focuses on the complex chemical interactions between additives in hydraulic fracturing fluid (HFF) and minerals and organic matter in oil/gas shales. These interactions affect hydrocarbon recovery by influencing mineral dissolution and precipitation processes, as well as the porosity and permeability of the shales. The review also discusses the distribution of unconventional oil/gas shales, the types and purposes of chemical additives in HFF, and analysis methods used in characterizing the shales before and after hydraulic fracturing.
Article
Energy & Fuels
V. Laranjeira, J. Ribeiro, N. Moreira, P. Nogueira, J. G. Mendonca Filho, F. Rocha, D. Flores
Summary: This study aims to investigate the association between Silurian black shales and Cu ore deposition in the Sousel-Barrancos metallogenic belt. Petrographic, geochemical, and mineralogical analysis of the black shales reveal significant Cu enrichment in the supergene enrichment domains, which is not directly related to organic carbon content. The mobilization of hydrothermal fluids, possibly of magmatic source, contributed to the discrepant maturation of organic matter in black shales.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Sheyore John Omovie, Mike Myers, John P. Castagna
Summary: Laboratory measurements and theoretical modeling show that there is no significant intrinsic dispersion from seismic to sonic and laboratory measurement frequencies due to fluid effects. The predicted velocities based on Gassmann and Biot-Gassmann models are consistent with the measured velocities.
Article
Geochemistry & Geophysics
Sen Yang, Danqing Liu, Zhe Yang, Changxiang Wang, Xiaohong Chen, Hai Li, Quan Li, Baoguo Yang, Yilian Li
Summary: The study investigated the mobility of trace elements in shale during oxidant stimulation, revealing different affinities between TEs and various fractions in the shale. It was found that carbonate minerals and pyrite played critical roles in reducing the mobility of TEs, highlighting the importance of understanding shale composition and optimizing engineering parameters before the in-situ application of this technology.
APPLIED GEOCHEMISTRY
(2021)
Article
Geosciences, Multidisciplinary
Patrycja Wojcik-Tabol, Malgorzata Wendorff-Belon, Pawel Kosakowski, Adam Zakrzewski, Leszek Marynowski
Summary: The Oligocene Menilite shales in the Polish Outer Carpathians represent different depositional environments, with the Znamirowice section showing terrestrial organic matter input and the Kobielnik section representing a more distal marine environment. The presence of abundant alginite indicates medium-to-high primary productivity, and the inorganic proxies suggest deposition in an unrestricted basin. The studied Menilite shales are considered to be source rocks with good-to-excellent hydrocarbon potential.
MARINE AND PETROLEUM GEOLOGY
(2022)
Review
Geochemistry & Geophysics
Roberto Buccione, Giovanna Rizzo, Giovanni Mongelli
Summary: We provide a review of the geochemistry of Meso-Cenozoic shales from the southern Apennines chain in Italy. The dominant clay minerals in these shales are 2:1 clay minerals, and weathering process involving illite-smectite-kaolinite evolution is suggested. The results also indicate moderate to intense weathering conditions in the source area.
Article
Geochemistry & Geophysics
Ramin Samadi, Ghodrat Torabi, Hiroshi Kawabata, Nathaniel R. Miller
Summary: Chemical compositions of Fe-Mg biotite can provide valuable insights into the petrogenesis of metamorphic and igneous rocks, but they are often influenced by co-existing phases such as garnet and muscovite. Different compositional variations in biotite are observed in igneous and metamorphic rocks, leading to challenges in using biotite compositions for petrogenetic classification schemes.
Article
Geosciences, Multidisciplinary
Meng Ding, Yifan Li, Tailiang Fan, Gary Lash, Xiaojie Wei, Tan Zhang
Summary: This study conducted a multidimensional geochemical investigation of the Longmaxi Formation and found that the samples experienced relatively weak to medium chemical weathering, the sediment shed from the provenance area had different recycling and sorting trends, the sediment was primarily derived from igneous rocks, and the tectonic setting varied across different geographic locations.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geography, Physical
Guangyao Cao, Yu Liu, Chao Li, Ping'an Peng, Mingcai Hou, Gary G. Lash, Xiaolin Zhou, Yuanchun Li, Ying Song
Summary: The Ordovician-Silurian transition is a critical geological period marked by significant climatic, environmental, and biological changes. This study examines the paleosalinity conditions of the inner Yangtze Sea during this period and finds that salinity variations are influenced by climate changes, particularly lower salinity during glacial intervals. These salinity perturbations are also linked to the development of euxinia in the inner Yangtze Sea, highlighting the importance of seawater salinity in driving evolutionary patterns during this critical period in Earth history.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Geology
Mizuki Ishida, Shunpei Murakami, Shiki Machida, Koichiro Fujinaga, Kazutaka Yasukawa, Tsuyoshi Ishikawa, Kazuya Nagaishi, Rie Tajiri, Kentaro Nakamura, Yasuhiro Kato
Summary: We present the geochemical and isotopic compositions of volcanic rocks from the Nansatsu area in South Kyushu. The volcanic rocks analyzed include samples from the Oldest, Older, and Middle stages, ranging from andesite to dacite in composition. Our results indicate that the Oldest stage rocks have a different magma source compared to the Older and Middle stage rocks, which share a common mantle source with Quaternary volcanic rocks in the region.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geology
Jaeguk Jo, Toshiro Yamanaka, Dongbok Shin
Summary: Ion adsorption-type rare earth element (REE) mineralization commonly occurs with kaolinite and halloysite in the weathered crusts of granitoid rocks. The enrichment of REEs in the clay fractions is higher under weakly acidic conditions (pH 5-7) but decreases sharply under more acidic conditions (pH <4). The geochemical characteristics and the features of nitrogen behavior in the bulk rock and its clay fraction contribute to our understanding of the genesis of ion adsorption-type REEs mineralization in the weathered crusts of granitoid rocks.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Zachary D. Atlas, Aurelie Germa, Brenna Boss, Osvaldo Meireles, Ami Ward, Jeffrey G. Ryan
Summary: Understanding the relationship between different components involved in the recycling of subducted sediment at arc volcanic systems is important. This study examines trace element variability along the Lesser Antilles Island Arc and suggests that sediment inputs via fluid transfer to the mantle wedge are necessary to explain certain trace element characteristics. The study also reveals variations in sediment composition along the arc and emphasizes the importance of considering localized variations in sediment contribution.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Ke Zhao, Xuebin Du, Yongchao Lu, Fang Hao, Zhanhong Liu, Jixin Jia
Summary: Subaerial volcanism and atmospheric volcanic ash deposition can greatly affect the nutrient content and redox conditions of the surface ocean. Study of volcanic ash and shale samples from the Ordovician-Silurian transition reveals anoxic and high-productivity environments, with leaching removing significant amounts of Fe, Si, and P from the volcanic ash, potentially enhancing marine primary productivity. The preservation of organic matter was influenced by redox conditions, with volcanic ash serving as a dominant nutrient source for primary productivity.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2021)
Article
Geochemistry & Geophysics
Zairong Liu, Joshua J. Shea, Stephen F. Foley, Yannick Bussweiler, Arno Rohrbach, Stephan Klemme, Jasper Berndt
Summary: The study shows that Cenozoic basaltic rocks in Eastern Australia have different mineralogical sources and metasomatic enrichments at different locations. Carbonatitic metasomatism resulted in the formation of source rocks with varying degrees, as evidenced by the trace element compositions of olivines and whole rock geochemistry.
Article
Geosciences, Multidisciplinary
Ali Al-Juboury, Aboosh Al-Hadidy
GEOLOGICAL JOURNAL
(2008)
Article
Geosciences, Multidisciplinary
Ali I. Al-Juboury, Aboosh H. Al-Hadidy
MARINE AND PETROLEUM GEOLOGY
(2009)
Article
Geosciences, Multidisciplinary
Ibrahim Q. Mohammed, Sherif Farouk, Hassan Baioumy, Naira Magdy Lotfy, Aboosh Hussain Al-Hadidy
MARINE AND PETROLEUM GEOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Walid A. Makled, Sherif Farouk, Aboosh Hussain Al-Hadidy, Ibrahim Q. Mohammed, Fadhil Ahmed Ameen Lawa
Summary: The Ordovician-Silurian hot shales in the Akkas Field are proven to be a source of hydrocarbon, with potential for liquid hydrocarbon generation. The study reveals the first record of important oil-prone organic matter in the region, with evidence of seasonal changes and evolution of telalginite particles.
MARINE AND PETROLEUM GEOLOGY
(2021)
Review
Geosciences, Multidisciplinary
Aboosh H. Al-Hadidy