Review
Geochemistry & Geophysics
Marta Polgari, Ildiko Gyollai
Summary: The role of biogenicity in the mineral world is significant, as biological processes interact with physical and chemical processes to form mineral deposits. Microbial structures can form large sedimentary ore deposits and serve as indicators of environmental reconstruction in ore formations.
Article
Geology
Marta Polgari, Ildiko Gyollai
Summary: Biogenicity plays a crucial role in mineralization processes, forming organic ore deposits and influencing element cycles. Microorganisms serve as fundamental catalysts in geochemical processes and can be used as indicators for reconstructing geological environments.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Xin Fan, Zheng-wang Hu, Shun-fang Xu, Chao Chen, Nan Yi Hubei
Summary: The study delves into the geological characteristics, importance of mineralization research, and the impact of different geological structures on mineralization in the Gejiu superlarge tin polymetallic mining area in Yunnan. By using the finite-element method to simulate mineralization and validating the results against the instance area, the research shows that hydrothermal flow is the main controlling factor and favorable metallogenic areas are located in specific geological structures.
ORE GEOLOGY REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Wenfa Shan, Xiancheng Mao, Zhankun Liu, Hao Deng, Lei Tang, Dutao Wang, Yong Pan, Yao Liu
Summary: This study used computational modeling to investigate the ore-forming processes in the Sanshandao-Haiyu gold belt. The results showed that only the syn-compressional scenario could produce dilation zones similar to the known orebodies, with the NW-SE direction being the major paleo compression stress direction during the ore-forming period. The estimated mineralization duration of the gold belt is less than 100,000 years.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geology
Dongyu Lu, Jingwen Mao, Huishou Ye, Peng Wang, Weiwei Chao, Miao Yu
Summary: The Jiangligou skarn W-(Cu-Mo) deposit is a scheelite-dominated skarn deposit in China, containing 42,000 tons of WO3 with byproducts of Cu and Mo. Four generations of scheelite (Sch I, Sch II, Sch III, and Sch IV) were identified based on mineral assemblages, textures, and geochemistry. Each generation has different REE patterns and characteristics. The variation in δEu, MREE, and Ce can be explained by the different oxidation-reduction conditions during scheelite precipitation. The depletion of HREE in Sch II and Sch I is attributed to the low concentration of HREE in the ore-forming fluid. The varied REE patterns suggest multiple episodes of ore-forming fluids during scheelite mineralization.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Abu Saeed Baidya, Atlanta Sen, Dipak C. Pal, Dewashish Upadhyay
Summary: The Khetri Copper Belt in western India likely hosts iron oxide-copper-gold mineralization, with sulfide mineralization associated with various types of alteration reflecting changing fluid composition. The presence of different pyrite vein types and their relationship with alteration suggests a complex mineralization process involving different fluid compositions.
MINERALIUM DEPOSITA
(2021)
Article
Geology
Hongying Qu, Binwu Zhang, Kurt Friehauf, Hui Wang, Chengyou Feng, Miao Yu
Summary: In this study, the geochronological and geochemical characteristics of apatites in a polymetallic ore district in NW China were systematically studied to understand the metallogenic processes. The results suggest that the apatite U-Pb ages of skarns and intrusions are 229-228 Ma, with the monzogranite emplacement slightly later than the syenogranite emplacement and skarn formation. The apatites in the skarn ores have high HREE contents and strong negative Eu anomalies, indicating the transition from magmatic crystallization to hydrothermal exsolution.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Fei Huang, Yu Fu, Dengfeng Li, Jinzhou Peng, Wentao He, Saiyu Li, Xiaoming Sun, Gaowen He
Summary: This study used in situ trace element and Nd isotope analyses to investigate the migration mechanism and geochemical characteristics of rare earth elements and yttrium (REYs) from Fe-Mn (oxyhydr)oxides to bioapatite in deep sea sediments. The results showed that high actinide REYs were primarily adsorbed onto bioapatite during early diagenesis, while low actinide REYs were mainly substituted for Fe-Mn (oxyhydr)oxides. Different morphological and geochemical types of Fe-Mn nodules provided insights into the transport and enrichment mechanisms of REYs in early diagenetic processes.
ORE GEOLOGY REVIEWS
(2023)
Article
Environmental Sciences
Natascha Menezes Bergo, Adriana Torres-Ballesteros, Camila Negrao Signori, Mariana Benites, Luigi Jovane, Bramley J. Murton, Ulisses Nunes da Rocha, Vivian Helena Pellizari
Summary: This study analyzed the composition and diversity of bacteria and archaea in deep-sea Fe-Mn crusts, nodules, and sediments from the Atlantic Ocean. The results showed that the microbiome of Fe-Mn deposits in the Atlantic seamounts had lower diversity and richness compared to the Pacific areas. Unique taxa and a higher abundance of potential metal-cycling bacteria were found in the crusts and nodules from Atlantic seamounts. The microbial beta-diversity was clearly grouped according to the microhabitats and geochemistry of the samples. These findings demonstrate the importance of microbial community analysis in environmental baseline studies for areas within the potential of deep-sea mining.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Andrew C. Strzelecki, Artas Migdisov, Hakim Boukhalfa, Kirsten Sauer, Kathryn G. McIntosh, Robert P. Currier, Anthony E. Williams-Jones, Xiaofeng Guo
Summary: A mechanism has been discovered that could lead to the enrichment of medium to heavy rare earth elements in hydrothermal systems. The study shows that a precursor fluoride mineral can fractionate rare earth elements, making it a potential exploration target for deposits rich in these elements.
Article
Geology
Ludovic Lafforgue, Augustin Dekoninck, Jocelyn Barbarand, Benjamin Brigaud, Mohammed Bouabdellah, Michele Verhaert, Abdellah Mouttaqi, Johan Yans
Summary: Carbonate-hosted Mn deposits in North Africa, particularly in the Bou Arfa deposit, are mainly found in Mesozoic dolomitic formations in the Moroccan Atlasic system. The mineralization is characterized by the presence of pyrolusite, manganite, hausmannite, goethite, and hematite, with ore formation accompanied by three dolomitization phases and precipitation mechanisms under diagenetic suboxic and alkaline conditions. Burial diagenesis, fluid mixing, and faulting have played crucial roles in the formation and transformation of the primary ores into pyrolusite.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Xiang Meng, Dayu Zhang, Rongqing Zhang, Jing Wang, Fei Zhang, Zhendong Yu, White C. Noel, Taofa Zhou
Summary: The Maopengdian tin-polymetallic deposit in northern Jiangxi Province is genetically related to muscovite granite, which is a potassic, peraluminous, highly differentiated S-type granite formed by partial melting of the upper crust. The geological and geochemical characteristics suggest that this deposit has promising prospects for tin mineralization.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Wang Liao, Xin-Fu Zhao, Li-Ping Zeng, Stefan Weyer, Chao Zhang, Ingo Horn, Francois Holtz
Summary: Iron isotopes of magnetite can provide insights into the sources and evolutionary processes of magma and ore deposits, but the effects of fluid-induced metasomatism on these isotopes are poorly understood. This study investigates the Fe isotopic and chemical compositions of magnetite from an iron oxide-apatite deposit in eastern China to assess the influence of fluid-assisted metasomatic processes on these compositions and to constrain the ore-forming processes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Sun Ki Choi, Sang Joon Pak, Jung-Woo Park, Hyun-Sub Kim, Jonguk Kim, Sang-Hoon Choi
Summary: The newly discovered TA25 West vent field (TA25 WVF) in the Tonga (Tofua) arc is a submarine hydrothermal system influenced by a magmatic contribution. The chimney and mound samples in this area are enriched in gold, silver, and other important metal elements, mainly in the form of nanoparticles and sulfide minerals. The rapid crystallization of sulfides induced by the magmatic contribution significantly contributes to the precipitation of Au-Ag-rich mineralization.
MINERALIUM DEPOSITA
(2023)
Article
Geochemistry & Geophysics
Ying Zhou Li, James E. Mungall
Summary: The komatiitic Raglan Horizon in northern Quebec hosts one of the largest komatiite-associated magmatic sulfide deposits in the world. This study investigates the variability of ore-forming processes at Raglan and suggests that the compositional variability of sulfide-bearing rocks can be explained by the difference in mass ratio between silicate and sulfide melts. The study also reveals that the orebodies occurred in highly localized environments, representing separate magmatic pulses within the larger Raglan system.
Article
Geology
Akos Kereszturi, Krisztian Fintor, Ildiko Gyollai, Zsolt Kereszty, Mate Szabo, Zoltan Szalai, Ena Walter
GEOLOGICAL QUARTERLY
(2018)
Article
Geochemistry & Geophysics
Alexander N. Krot, Kazuhide Nagashima, Krisztian Fintor, Elemer Pal-Molnar
GEOCHIMICA ET COSMOCHIMICA ACTA
(2019)
Article
Geosciences, Multidisciplinary
Wenchao Yu, Marta Polgari, Ildiko Gyollai, Krisztian Fintor, Mate Szabo, Ivett Kovacs, Jozsef Fekete, Yuansheng Du, Qi Zhou
PRECAMBRIAN RESEARCH
(2019)
Article
Multidisciplinary Sciences
B. Szalontai, M. Debreczeny, K. Fintor, Cs Bagyinka
SCIENTIFIC REPORTS
(2020)
Article
Geochemistry & Geophysics
Krisztian Fintor, Andrea Varga
Article
Geosciences, Multidisciplinary
Joao Carlos Biondi, Marta Polgari, Ildiko Gyollai, Krisztian Fintor, Ivett Kovacs, Jozsef Fekete, Stephen J. Mojzsis
PRECAMBRIAN RESEARCH
(2020)
Article
Geology
Peter Gal, Marta Polgari, Sandor Jozsa, Ildiko Gyollai, Ivett Kovacs, Mate Szabo, Krisztian Fintor
ORE GEOLOGY REVIEWS
(2020)
Article
Thermodynamics
Livia Majoros, Krisztian Fintor, Tamas Koos, Sandor Szakall, Ferenc Kristaly
Summary: The study aimed to prove the presence of graphite through thermal analysis methods and found that it accounts for 1.5-3% of the samples, often forming in flake-shaped aggregates. Raman spectroscopy results indicated that graphite was mainly formed in organic-rich shales.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Geology
Wenchao Yu, Marta Polgari, Krisztian Fintor, Ildiko Gyollai, Mate Szabo, Felicitasz Velledits, Zhichen Liu, Yuansheng Du
Summary: The economically important manganese deposits in the Middle Permian Maokou Formation of Zunyi, northern Guizhou, South China, are controlled by both hydrothermal and microbial processes. The formation of manganese deposits in the transitional zone between carbonate platforms and troughs was influenced by microbial activity during the early diagenesis, in addition to hydrothermal activity in the basin. The combination of these processes contributed to the formation of the manganese ore in Zunyi.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Wenchao Yu, Marta Polgari, Ildiko Gyollai, Krisztian Fintor, Heng Huang, Mate Szabo, Yuansheng Du
Summary: This study reveals the microbial metallogenesis process in the Early Carboniferous manganese deposit of central Guangxi, providing new insights into the genesis of the deposit.
ORE GEOLOGY REVIEWS
(2021)
Article
Geochemistry & Geophysics
Medet Junussov, Madai Ferenc, Kristaly Ferenc, Toth Tivadar, Fintor Krisztian, Muranszky Gabor, Prekob Adam, Hamor-Vido Maria
Summary: The study provides new analytical data on the nature and occurrence of gold in solid pyrobitumen from the Bakyrchik gold deposit in Kazakhstan. It confirms the enrichment of gold associating with organic matter and sulfide ore minerals, with pyrobitumen playing a decisive role in the concentration, transportation, and preservation of gold in the deposit.
Article
Geology
Marta Polgari, Joao Carlos Biondi, Ildiko Gyollai, Krisztian Fintor, Mate Szabo
Summary: This study provides evidence for two microbial ore forming systems in Neoproterozoic banded iron formations and ironstones, characterized by Fe-and Mn-oxidizing metabolic processes and intense cyanobacterial activity. Microscopic and spectroscopic analysis identified various minerals, pointing to low temperature, suboxic, neutral/slightly alkaline formation conditions. The direct evidence of microbial action includes microtextural evidence, syngenetic mineral types, light isotope signals and mineralized sedimentation cycles.
ORE GEOLOGY REVIEWS
(2021)
Article
Chemistry, Analytical
Nikolai I. Sushkov, Gabor Galbacs, Krisztian Fintor, Nikolay V. Lobus, Timur A. Labutin
Summary: This study used modern analytical techniques and chemometric techniques to analyze zooplankton organisms that accumulate lithium. The study found correlations between the elemental and molecular composition of zooplankton. By using different algorithms to process the spectra data, the study revealed correlations between lithium and potassium, carotenoids, and tryptophan. The combination of laser-induced breakdown spectroscopy and Raman spectroscopy, followed by appropriate mathematical treatment, is a convenient tool for comprehensive studies of environmental objects.
Article
Environmental Sciences
Mate Karlik, Ildike Gyollai, Anna Vancsik, Krisztian Fintor, Zoltan Szalai, Marcel Mindrescu, Ionela Gradinaru, Sandor Vagasi, Gabor Bozso, Marta Polgari, Elemer Pal-Molnar
Summary: High resolution multi-methodological investigations were conducted on the catchment and sediments of Lake Bolatau in Romania to characterize paleoenvironmental and formation conditions. The study revealed the appearance of new mineral species, support for physical and chemical weathering in soil formation, and significant microbial contribution to lake sediments.
CARPATHIAN JOURNAL OF EARTH AND ENVIRONMENTAL SCIENCES
(2021)
