Article
Geology
Luojing Wang, Dawei Lv, James C. Hower, Zhihui Zhang, Munira Raji, Jigen Tang, Yamin Liu, Jie Gao
Summary: The purpose of this study is to investigate the geochemical characteristics and paleoclimate significance of Middle Jurassic Aalenian coals in the Ordos Basin in north China. The results show that these coals are highly enriched in critical elements and have a negative Eu anomaly. The Sr/Cu and Sr/Ba data indicate a climate change from a relatively arid condition to a more humid climate.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Wen-Sheng Li, Pei Ni, Jun-Yi Pan, Benedetto De Vivo, Stefano Albanese, Ming-Sen Fan, Yan Gao, De-Xian Zhang, Zhe Chi
Summary: The Chuankou W deposit in South China contains scheelite and wolframite mineralization. Petrography, microthermometry, and Raman spectroscopic analyses were conducted on fluid inclusions in scheelite, wolframite, and quartz to determine the fluid characteristics. LAICP-MS analysis was used to obtain element concentrations in the fluids. The results suggest that the magmatic-sourced fluids and fluid-wall-rock interactions played a significant role in the mineralization of the deposit.
ORE GEOLOGY REVIEWS
(2022)
Review
Geology
Eimear Deady, Charlie Moon, Kathryn Moore, Kathryn M. Goodenough, Robin K. Shail
Summary: Bismuth is a widely found material in various types of mineral deposits. It is usually considered a by-product with negative effects. However, its recognition as a critical raw material by the European Commission in 2017 and a critical mineral by the USA in 2018 has reignited interest in bismuth production and its supply security. Bismuth is experiencing increasing demand, mainly as a substitute for lead and for its use in chemicals. It is primarily chalcophile in its behavior, but also possesses some lithophile characteristics. Bismuth is concentrated in felsic crustal lithologies, particularly fractionated granites, where it can replace zirconium in zircon. It can be found in a variety of minerals, with native bismuth and bismuthinite being the most important hydrothermal minerals.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Simone Bello, Carlo Andrenacci, Daniele Cirillo, Chelsea P. Scott, Francesco Brozzetti, J. Ramon Arrowsmith, Giusy Lavecchia
Summary: This study provides a detailed analysis of the fault segmentation during the 1983 Borah Peak earthquake through integrated data. The findings offer valuable insights for seismotectonic studies and can be applied to other regions.
Article
Geology
Jesse B. Walters, Alicia M. Cruz-Uribe, Won Joon Song, Christopher Gerbi, Kimberly Biela
Summary: Titanite, as a U-Pb petrochronometer, can record metamorphism, metasomatism, and deformation. However, the presence of inherited lead in titanite may lead to inaccurate U-Pb dates. In this study, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was used to analyze titanite from banded calcsilicate gneisses in south-central Maine, USA. The results show multiple titanite populations with different ages, textures, and compositions, revealing the timing of diopside fracturing and recrystallization, as well as fluid infiltration events. The findings emphasize the importance of considering U-Pb data along with chemical and textural data to ensure accurate interpretations.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Article
Geology
Adam Brudner, Hehe Jiang, Xu Chu, Ming Tang
Summary: The Grenville Province in eastern Laurentia is an important remnant of the ancient supercontinent Rodinia, and understanding its orogenic history is crucial for studying the tectonics and paleoenvironmental evolution of the Mesoproterozoic era. This study compares two geochemical proxies for crustal thickness and finds evidence of multiple episodes of crustal thickening and thinning during the Grenville orogeny. The thickest crust formed during the Ottawan phase, but it was still thinner than the modern Tibet plateau.
Article
Geology
Eric A. Barefoot, Jeffrey A. Nittrouer, Brady Z. Foreman, Elizabeth A. Hajek, Gerald R. Dickens, Tramond Baisden, Leah Toms
Summary: Research suggests that the increased fluvial sediment flux during the Paleocene-Eocene thermal maximum (PETM) may not be attributed to increased water discharge or river slope. Instead, it is likely caused by river morphodynamics and sediment advection under variable-discharge conditions.
Article
Geology
Chuang Zhou, Zhen Yang, Huashan Sun, Kadio Aka D. Koua, Changliang Lyu
Summary: This study used in-situ trace element analysis to reveal the ore genesis and physicochemical characteristics of ore-forming fluids in the Beishan Pb-Zn ore district. The trace element compositions, distributions, and substitution mechanisms of sphalerite and pyrite provided insights into the temperature conditions of mineralization. The results suggest that the Beishan Pb-Zn ore district belongs to the Mississippi Valley Type (MVT) deposits.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Yun-Hui Zhang, Rong-Wen Yao, Ying Wang, Ji Duo, Hua-Wen Cao
Summary: The genesis and spatial-temporal evolution of Pb-Zn mineralization in the Northern Gangdese Metallogenic Belt were studied through the investigation of the Zebuxia Pb-Zn deposit. The research results provide insights into the prospecting potential of the Western section of the Northern Gangdese Metallogenic Belt.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Xiting Long, Heping Xie, Xinping Deng, Xiangyue Wen, Jian Ou, Renwen Ou, Jun Wang, Fei Liu
Summary: The experiments on geothermal resources in Rucheng County showed that the F3 fault zone and F1 hanging wall secondary fault are the main thermal control structures. The geothermal water in this area has high pH and EC values, but low corrosiveness and calcium carbonate scaling, indicating promising application prospects.
Article
Geology
Bo Xing, Jingwen Mao, Xiaoniu Xiao, Huan Liu, Cai Zhang, Sheng Guo, Hongyu Li, Wuyan Huang, Chunkit Lai
Summary: Central Fujian in southeastern China is an important polymetallic mineral province with disputed mineralization models. The Fengyan stratabound Zn-Pb deposit contains two types of sphalerite with different trace element compositions, suggesting a skarn deposit classification. This study highlights the effectiveness of sphalerite trace element geochemistry for differentiating ore deposit types.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Cosme F. Rombola, Carlos D. Greppi, Roberto R. Pujana, Juan L. Garcia Massini, Eduardo S. Bellosi, Sergio A. Marenssi
Summary: This study describes two silicified fossil woods from the Cerro Fortaleza Formation in Santa Cruz Province, Argentina, identifying them as a new species of the fossil genus Brachyoxylon. The anatomical characteristics of these specimens indicate distinct growth ring boundaries, absence of axial parenchyma, uniseriate rays, and other features typical of this genus. This record contributes fresh evidence to the prevalence and widespread distribution of Cheirolepidiaceae in the Cretaceous of Patagonia.
CRETACEOUS RESEARCH
(2022)
Article
Geology
Brian K. Horton, Tomas N. Capaldi, Nicholas D. Perez
Summary: Convergent plate boundaries exhibit variations in orogenic width and intraplate deformation. Analysis of late Cenozoic contractile deformation along the Andean mountain front highlights the contrasting degrees of deformation advance towards the plate interior and demonstrates the role of lithospheric strengthening, weakening, and/or tectonic inheritance in shaping the orogenic architecture of Cordilleran margins.
Article
Geology
Jussi S. Heinonen, Frank J. Spera, Wendy A. Bohrson
Summary: Research shows that the assimilation limit in primitive magmas for upper and middle crust is around 20-30 wt%, while for lower crust it can be as high as 59-102 wt%. The compositions of the parental melt and the assimilant significantly impact the amount of assimilation possible in primitive magmas and the final magma composition.
Review
Geology
Beilei Sun, Yunxia Liu, Lucie Tajcmanova, Chao Liu, Jie Wu
Summary: This study investigates the occurrence and enrichment mechanism of lithium in the high-lithium Antaibao No.11 coal seam. Through statistical correlation and in-situ analysis methods, it is found that lithium primarily occurs in illite, montmorillonite, chlorite, and tourmaline minerals. The occurrence and enrichment of lithium vary in different coal benches, influenced by seawater and terrigenous materials.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Li Liu, Daniel F. Stockli, Timothy F. Lawton, Jie Xu, Lisa D. Stockli, Majie Fan, Gregory C. Nadon
Summary: This study identifies previously indistinguishable source terranes by analyzing the differential rim ages of Grenville detrital zircons (DZs) in different regions of North America. The researchers found that Grenville DZ grains sourced from the southern Appalachian orogen exhibit different rim ages compared to grains derived from Mexico. This differentiation provides important insights into reconstructing global source-to-sink systems and understanding genetic linkages within multistage orogenic systems.
Article
Geology
Mohamed A. Abdelkader, Yasushi Watanabe, Ali Shebl, Hanna A. El-Dokouny, Maher Dawoud, Arpad Csamer
Summary: In this study, satellite data and image processing techniques were used to effectively identify albitized granite (ABG) in the Umm Naggat area of Central Eastern Desert, Egypt. By integrating different datasets and applying the support vector machine algorithm, high-quality lithological interpretation maps were generated. New occurrences of ABG were discovered and the location of known mineralized zones was confirmed. The spatial correlation between ABG, structural density zones, and hydrothermal alteration suggests that rare-metal mineralization is mainly structurally controlled.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Barbara E. Kunz, Clare J. Warren, Frances E. Jenner, Nigel B. W. Harris, Tom W. Argles
Summary: This study investigates the enrichment mechanism of metals such as Li, Be, V, Co, Nb, In, Cs, Sn, Ta, and W in metamorphic processes. By analyzing muscovite and biotite from metasediment-hosted samples, the study reveals the preferential incorporation of these metals into mica minerals and their release during crustal melting. The findings highlight the importance of higher-temperature melting, particularly biotite breakdown reactions, for the mobilization of these critical metals.
Article
Geology
Adam Tomasovych, Ivo Gallmetzer, Alexandra Haselmair, Martin Zuschin
Summary: The study suggests that the prediction of sequence stratigraphic framework does not apply to environments where carbonate production keeps up with sea-level rise. Instead, hiatus durations can be estimated by measuring the residence time of skeletal particles in the mixed layer, as demonstrated in a Holocene sequence in the Adriatic Sea. This research highlights the importance of considering taphonomic processes in understanding sedimentation rates and hiatuses in ancient environments.
Article
Geology
Eric Font, Jiubin Chen, Marcel Regelous, Anette Regelous, Thierry Adatte
Summary: This study investigates the mercury isotope composition and behavior of trace elements in K-Pg sediments from the Bidart section in southwest France. The findings suggest that the Deccan Traps volcanic activity may have contributed to the K-Pg mass extinction.
