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Relevant bibliographies by topics / Paleo-redox

Academic literature on the topic 'Paleo-redox'

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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Journal articles on the topic "Paleo-redox"

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Dideriksen, K., B. C. Christiansen, C. Frandsen, T. Balic-Zunic, S. Mørup, and S. L. S. Stipp. "Paleo-redox boundaries in fractured granite." Geochimica et Cosmochimica Acta 74, no. 10 (May 2010): 2866–80. http://dx.doi.org/10.1016/j.gca.2010.02.022.

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Asahina, Kenta, Satoshi Takahashi, Ryosuke Saito, Kunio Kaiho, and Yasuhiro Oba. "Maleimide index: a paleo-redox index based on fragmented fossil-chlorophylls obtained by chromic acid oxidation." RSC Advances 12, no. 48 (2022): 31061–67. http://dx.doi.org/10.1039/d2ra04702k.

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Liu, Y. G., M. R. U. Miah, and R. A. Schmitt. "Cerium: A chemical tracer for paleo-oceanic redox conditions." Geochimica et Cosmochimica Acta 52, no. 6 (June 1988): 1361–71. http://dx.doi.org/10.1016/0016-7037(88)90207-4.

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Madukwe, Henry Y. "Source-Area Weathering, Composition and Paleo-Redox Condition of Stream Sediments from Ijero-Ekiti, Nigeria." International Journal of Trend in Scientific Research and Development Volume-1, Issue-5 (August 31, 2017): 446–65. http://dx.doi.org/10.31142/ijtsrd2365.

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Devi, Salam Ranjeeta. "Geochemistry of the Transitional beds between Disang and Barail Successions of the Imphal Valley, Indo-Myanmar Ranges." Journal of The Indian Association of Sedimentologists 39, no. II (December 31, 2022): 10–16. http://dx.doi.org/10.51710/jias.v39iii.247.

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Major and trace element concentrations were studied from the tansitional beds between Disang and Barail Successions of the Imphal valley, Indo-Myanmar Ranges. Various major and trace element ratios and discrinant diagrams were used to descipher paleoclimate, paleo-redox condition and sedimentary depositional environment of the Disang-Barail Transitional beds. SiO2 vs Al2O3+K2O+ Na2O diagram and Rb/Sr ratios indicates that paleoclimate during the deposition of the sediments changed from arid to semi-arid and humid climate. Ni/Co, V/Cr, V/(Ni+V), V/Sc ratios suggest that these sediments were deposited in oxic, suboxic to anoxic conditions. V/(Ni+V) vs V/Cr diagram suggests paleo-redox environment dominated by sub-reduction to oxidization during Disang –Barail Transitional deposition. The sediments were deposited in transitional to marine depositional environment.

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Stylo, Malgorzata, Nadja Neubert, Yuheng Wang, Nikhil Monga, Stephen J. Romaniello, Stefan Weyer, and Rizlan Bernier-Latmani. "Uranium isotopes fingerprint biotic reduction." Proceedings of the National Academy of Sciences 112, no. 18 (April 20, 2015): 5619–24. http://dx.doi.org/10.1073/pnas.1421841112.

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Knowledge of paleo-redox conditions in the Earth’s history provides a window into events that shaped the evolution of life on our planet. The role of microbial activity in paleo-redox processes remains unexplored due to the inability to discriminate biotic from abiotic redox transformations in the rock record. The ability to deconvolute these two processes would provide a means to identify environmental niches in which microbial activity was prevalent at a specific time in paleo-history and to correlate specific biogeochemical events with the corresponding microbial metabolism. Here, we demonstrate that the isotopic signature associated with microbial reduction of hexavalent uranium (U), i.e., the accumulation of the heavy isotope in the U(IV) phase, is readily distinguishable from that generated by abiotic uranium reduction in laboratory experiments. Thus, isotope signatures preserved in the geologic record through the reductive precipitation of uranium may provide the sought-after tool to probe for biotic processes. Because uranium is a common element in the Earth’s crust and a wide variety of metabolic groups of microorganisms catalyze the biological reduction of U(VI), this tool is applicable to a multiplicity of geological epochs and terrestrial environments. The findings of this study indicate that biological activity contributed to the formation of many authigenic U deposits, including sandstone U deposits of various ages, as well as modern, Cretaceous, and Archean black shales. Additionally, engineered bioremediation activities also exhibit a biotic signature, suggesting that, although multiple pathways may be involved in the reduction, direct enzymatic reduction contributes substantially to the immobilization of uranium.

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Wei, Mingyang, Zhidong Bao, Axel Munnecke, Wei Liu, G. Harrison, Hua Zhang, Demin Zhang, et al. "Paleoenvironment of the Lower–Middle Cambrian Evaporite Series in the Tarim Basin and Its Impact on the Organic Matter Enrichment of Shallow Water Source Rocks." Minerals 11, no. 7 (June 22, 2021): 659. http://dx.doi.org/10.3390/min11070659.

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Just as in deep-water sedimentary environments, productive source rocks can be developed in an evaporitic platform, where claystones are interbedded with evaporites and carbonates. However, the impact of the paleoenvironment on the organic matter enrichment of shallow water source rocks in an evaporite series has not been well explored. In this study, two wells in the central uplift of the Tarim Basin were systematically sampled and analyzed for a basic geochemical study, including major elements, trace elements, and total organic carbon (TOC), to understand the relationship between TOC and the paleoenvironmental parameters, such as paleosalinity, redox, paleoclimate, paleo-seawater depth, and paleoproductivity. The results show that the Lower–Middle Cambrian mainly developed in a fluctuating salinity, weak anoxic to anoxic, continuous dry and hot, and proper shallow water environment. The interfingering section of evaporites, carbonates, and claystones of the Awatag Fm. have higher paleoproductivity and higher enrichment of organic matter. Paleosalinity, redox, paleoclimate, paleo-seawater depth, and paleoproductivity jointly control the organic matter enrichment of shallow water source rocks in the evaporite series. The degree of enrichment of organic matter in shallow water source rocks first increases and then decreases with the increase in paleosalinity. All the samples with high content of organic matter come from the shallower environment of the Awatag Fm.

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Mansour, Ahmed, Thomas Gentzis, Ibrahim M. Ied, Mohamed S. Ahmed, and Michael Wagreich. "Paleoenvironmental Conditions and Factors Controlling Organic Carbon Accumulation during the Jurassic–Early Cretaceous, Egypt: Organic and Inorganic Geochemical Approach." Minerals 12, no. 10 (September 26, 2022): 1213. http://dx.doi.org/10.3390/min12101213.

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The Jurassic–Early Cretaceous was a time of variable organic carbon burial associated with fluctuations of marine primary productivity, weathering intensity, and redox conditions in the pore and bottom water at paleo-shelf areas in north Egypt. This time interval characterized the deposition of, from old to young, the Bahrein, Khatatba, Masajid, and Alam El Bueib Formations in the north Western Desert. Although several studies have been devoted to the excellent source rock units, such as the Khatatba and Alam El Bueib Formations, studies on paleoenvironmental changes in redox conditions, paleoproductivity, and continental weathering and their impact on organic carbon exports and their preservation for this interval are lacking. This study presents organic and inorganic geochemical data for the Jurassic–Lower Cretaceous sediments from the Almaz-1 well in the Shushan Basin, north Western Desert. A total of 32 cuttings samples were analyzed for their major and trace elements, carbonates, and total organic carbon (TOC) contents. Data allowed the reconstruction of paleoenvironmental conditions in the southern Tethys Ocean and assessment of the changes in paleo-redox, paleo-weathering, and marine primary productivity, and the role of sediment supply. Additionally, factors that governed the accumulation of organic matter in the sediment were interpreted. Results showed that the Khatatba Formation was deposited during a phase of enhanced marine primary productivity under prevalent anoxia, which triggered enhanced organic matter production and preservation. During the deposition of the Khatatba Formation, significant terrigenous sediment supply and continental weathering were followed by a limited contribution of coarse clastic sediment fluxes due to weak continental weathering and enhanced carbonate production. The Bahrein, Masajid, and Alam El Bueib Formations were deposited during low marine primary productivity and prevalent oxygenation conditions that led to poor organic matter production and preservation, respectively. A strong terrigenous sediment supply and continental weathering predominated during the deposition of the Bahrein Formation and the lower part of the Alam El Bueib Formation compared to the limited coarse clastic supply and continental weathering during the deposition of the carbonate Masajid Formation and the upper part of the Alam El Bueib Formation. Such conditions resulted in the enhanced dilution and decomposition of labile organic matter, and, thus, organic carbon-lean accumulation in these sediments.

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Mahu, Edem, Daniel K. Asiedu, Elvis Nyarko, Samuel Hulme, Kenneth H. Coale, and Chris Y. Anani. "Provenance, paleo-weathering and -redox signatures of estuarine sediments from Ghana, Gulf of Guinea." Quaternary International 493 (November 2018): 176–86. http://dx.doi.org/10.1016/j.quaint.2018.06.005.

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van der Land, Cees, Furu Mienis, Henk de Haas, Henko C. de Stigter, Rudy Swennen, John J. G. Reijmer, and Tjeerd C. E. van Weering. "Paleo-redox fronts and their formation in carbonate mound sediments from the Rockall Trough." Marine Geology 284, no. 1-4 (June 2011): 86–95. http://dx.doi.org/10.1016/j.margeo.2011.03.010.

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Dissertations / Theses on the topic "Paleo-redox"

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Voegelin, Andrea. "The molybdenum isotopic composition of carbonate rocks : setup of a novel paleo-redox proxy and its application to geological problems /." [S.l.] : [s.n.], 2009. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000288146.

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Al-Busaidi, Q. H. "Chemostratigraphy of Cambrian carbonates in the Amadeus Basin: implications for paleo-depositional environments and marine redox." Thesis, 2018. http://hdl.handle.net/2440/130323.

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The Paleozoic sedimentary sequences from the Amadeus Basin in the Northern Territory (NT) have been a subject of several studies due to their economic and scientific significance. However, the applications of trace element and/or stable and radiogenic isotope proxies (e.g., REE, C and Sr isotopes) to Cambrian carbonate records from the Amadeus Basin are quite limited. Strontium isotope ratio (87Sr/86Sr) and the major and trace elemental concentration data (including REE, and paleo-redox Ce anomaly) were used in this study to constrain the paleo-depositional environment and the redox conditions in the NE parts of the Amadeus Basin during the middle Cambrian, based on analysis of carbonates from two drill cores (Alice 1 and Dingo2). Importantly, acquired data from these two remote cores are consistent with a presumably regional and perhaps basin-wide signal. In detail, this study shows that the lower or older successions (Giles Creek Dolomite mainly) have 87Sr/86Sr record that is consistent with the expected coeval middle Cambrian paleo-seawater Sr isotope composition, and REE data point to more oxic conditions. This in turn suggests either a limited restriction of the basin from the Cambrian global ocean during this time (~515 to 505 Ma), or alternatively an existence of “evaporitic seaway” setting. Considering the evidence for major evaporitic cycles in the studied records, the latter scenario is more plausible. In contrast, the upper and younger successions have a 87Sr/86Sr ratio that is non-marine and much more radiogenic, plus REE data indicate more reducing conditions. These proxy data thus indicate a substantial restriction of the basin during this time (~505 to 495 Ma) and an overall increase in the input of continental Sr flux into the basin via weathering, likely due to more humid climate. Overall, this study argues that the older middle Cambrian sedimentary record from the Amadeus Basin was deposited under generally oxic conditions while still being connected at some level to the open ocean during times of hotter or greenhouse climate, the latter reflected as repetitive evaporitic cycles. The younger Cambrian record, during the positive C isotope (SPICE) event, was in contrast deposited under more reducing redox conditions and enhanced continent-derived weathering fluxes, driven by climate change (arid to humid), amplified by the equatorial position of the Amadeus Basin during the Cambrian times.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2018

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Love, A. G. "Strontium isotope constraints on the Neoproterozoic stratigraphy of northeastern Amadeus Basin, NT, Australia." Thesis, 2017. http://hdl.handle.net/2440/128257.

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We measured elemental concentrations (including rare earth elements, REEs) and radiogenic strontium isotopes (87Sr/86Sr ratios) from the Neoproterozoic carbonate-rich formations in the northeastern Amadeus Basin, in the central Australia. The acquired composite 87Sr/86Sr trend from the Amadeus Basin has the potential to be used for future strontium isotope stratigraphic (SIS) studies, in this semi-restricted intra-cratonic basin, as its local 87Sr/86Sr trend differs from the global Sr isotope seawater curve. Specifically, our composite 87Sr/86Sr trend from the Amadeus Basin is systematically more radiogenic compared to the coeval global ocean, which could be explained by a partial restriction of the Amadeus Basin during the Neoproterozoic. In particular, our elemental and isotope data show the following trends: the Ediacaran (post-Marinoan) Olympic cap carbonates (~635 Ma) revealed (i) radiogenic 87Sr/86Sr values which support the meltwater plume hypothesis and the above-mentioned basin restriction, and (ii) paleo-redox proxy data (Ce/Ce*) suggest more reducing (anoxic) conditions in the Amadeus Basin in the aftermath of the Marinoan glaciation. In contrast, the 87Sr/86Sr measurements of the Cryogenian Ringwood Member of the Aralka Formation (~658 Ma) revealed values that are approaching the global seawater 87Sr/86Sr curve, which in turn suggest relatively higher connectivity of the basin with the global ocean during this time. The paleo-redox proxy data (Ce/Ce*) from carbonates of the Cryogenian Ringwood Member and the Tonian Bitter Springs Group (~800 Ma) revealed less reducing and potentially sub-oxic conditions during these glacier-free intervals. Overall, our composite Neoproterozoic Sr isotope trend from the NE Amadeus Basin seems to mimic the global seawater 87Sr/86Sr curve, however, with a systematic offset of about ~ 0.001 to ~ 0.002 units towards more radiogenic values.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2017

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Toledo, G. E. "Chromium Isotope Constraints on the Mid-Proterozoic redox: evidence from δ53Cr of carbonates from the greater McArthur Basin, northern Australia." Thesis, 2018. https://hdl.handle.net/2440/133689.

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The Great Oxygenation Event (GOE) and the Neoproterozoic Oxygenation Event (NOE) are interpreted to have made the most profound and permanent surface redox changes in Earth’s history. Changes in redox conditions between these two oxygenation events (i.e. mid-Proterozoic; 1.8-0.8 Ga) are poorly understood where environmental stability with persistently low atmospheric oxygen is assumed (<0.1% PAL; Present Atmospheric Levels). This period also witnessed the first appearance of primitive eukaryotes, however Eukarya diversification was determined to be effectively stagnant presumably due to sustained low atmospheric oxygen levels (pO2). More recent studies found evidence of relatively high mid-Proterozoic pO2, well in excess of 1% PAL, sufficient to promote diversification. The importance of better understanding the past redox conditions heightens due to the contrasting pO2 estimates that plausibly swayed the Eukarya diversification. This study presents stable Cr isotope (δ53Cr) values in mid-Proterozoic organic-rich carbonates of the Limbunya and McArthur Groups from the greater McArthur Basin. Analysed values from -0.293‰ to +1.389‰, present the oldest documented positively fractionated mid-Proterozoic δ53Cr values in marine carbonate units ca. 1.64 Gyrs ago, suggestive of a fluctuating, but increasing pO2 at the time of a generally reducing environment and supporting a permissive environment for Eukarya diversification. However, it is likely that its unstable nature probably inhibited wider and earlier Eukarya diversification, should pO2 levels truly be a barrier for evolution.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2018

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Book chapters on the topic "Paleo-redox"

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Sato, Tomohiko, Yukio Isozaki, Katsumi Shozugawa, Kimiko Seimiya, and Motoyuki Matsuo. "57Fe Mössbauer analysis of the Upper Triassic-Lower Jurassic deep-sea chert: Paleo-redox history across the Triassic-Jurassic boundary and the Toarcian oceanic anoxic event." In ICAME 2011, 675–78. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-4762-3_117.

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Madhavaraju, J., S. M. Hussain, J. Ugeswari, R. Nagarajan, S. Ramasamy, and P. Mahalakshmi. "Paleo-Redox Conditions of the Albian-Danian Carbonate Rocks of the Cauvery Basin, South India." In Chemostratigraphy, 247–71. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-12-419968-2.00010-8.

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Bianchi, Thomas S., and Elizabeth A. Canuel. "Chemical Biomarker Applications to Ecology and Paleoecology." In Chemical Biomarkers in Aquatic Ecosystems. Princeton University Press, 2011. http://dx.doi.org/10.23943/princeton/9780691134147.003.0002.

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This chapter provides a brief historical account of the success and limitations of using chemical biomarkers in aquatic ecosystems. It also introduces the general concepts of chemical biomarkers as they relate to global biogeochemical cycling. The application of chemical biomarkers in modern and/or ancient ecosystems is largely a function of the inherent structure and stability of the molecule, as well as the physicochemical environment of the system wherein it exists. In some cases, redox changes in sediments have allowed for greater preservation of biomarker compounds; in well-defined laminated sediments; for example, a strong case can be made for paleo-reconstruction of past organic matter composition sources. However, many of the labile chemical biomarkers may be lost or transformed within minutes to hours of being released from the cell from processes such as bacterial and/or metazoan grazing, cell lysis, and photochemical breakdown. The role of trophic effects versus large-scale physiochemical gradients in preserving or destroying the integrity of chemical biomarkers varies greatly across different ecosystems. These effects are discussed as they relate to aquatic systems such as lakes, estuaries, and oceans.

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Cao, Kang, Zhi-Ming Yang, Zeng-qian Hou, Noel C. White, and Chao Yu. "Contrasting Porphyry Cu Fertilities in the Yidun Arc, Eastern Tibet: Insights from Zircon and Apatite Compositions and Implications for Exploration." In Tectonomagmatic Influences on Metallogeny and Hydrothermal Ore Deposits: A Tribute to Jeremy P. Richards (Volume II), 231–55. Society of Economic Geologists, 2021. http://dx.doi.org/10.5382/sp.24.13.

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Abstract The Yidun arc, part of the Sanjiang Paleo-Tethyan orogenic belt in eastern Tibet, hosts several porphyry Cu deposits in its southern section, whereas abundant contemporaneous but barren granitoid intrusions occur in the northern section. Here we present an integrated, temporally constrained dataset of zircon and apatite compositions together with whole-rock geochemical results for both the fertile and barren suites in the Yidun arc. We investigate the probable factors leading to such contrasting porphyry Cu fertilities and also assess the application of geochemical and mineral proxies for porphyry Cu exploration. Both the fertile and barren suites in the Yidun arc share similar petrographic and geochemical characteristics typical of arc magmas. However, the two suites have distinct differences in certain trace elements and element ratios (e.g., Sr, Y, Sr/Y, V/Sc, Eu anomaly). The fertile suites have adakite-like character, with high Sr/Y, La/Yb, and V/Sc ratios, and show no or minimal negative Eu anomalies, indicating early dominant amphibole with limited plagioclase fractionation. By contrast, the barren suites have low Sr/Y, La/Yb, and V/Sc ratios, and display minimal to significant negative Eu anomalies. These barren suites probably formed by crystal fractionation dominated by plagioclase, with limited amphibole crystallizing from the same parental magma. Zircon geochemical data for both suites combined with Rayleigh fractionation modeling show that zircon compositions (e.g., Hf, Ti, [Yb/Dy]N, Eu/Eu*, Ce/Nd) are affected by the compositions, water content, and redox state of the parental magma, as well as by prior or concurrent crystallization of minerals (e.g., plagioclase, amphibole, apatite, titanite). For the fertile suites, the high zircon Eu/Eu* (0.43–0.91), ΔFMQ (0.8–2.4; where ΔFMQ is the log fO2 difference between the sample value and the fayalite-magnetite-quartz mineral buffer), the presence of the assemblage amphibole + titanite + quartz + magnetite, and high whole-rock Fe2O3/FeO, Sr/Y and V/Sc ratios, collectively indicate that associated magmas were hydrous and oxidized. For the barren suites, the common presence of the assemblage amphibole + ilmenite, low zircon Eu/Eu* (0.01–0.34) and ΔFMQ (–3.3 to +0.5), and low whole-rock Fe2O3/FeO, Sr/Y, and V/Sc ratios, together indicate that the related magmas were hydrous but reduced. Magmatic apatites in the fertile suites have higher SO3 contents (0.07–0.79 wt %) than those in the barren suites (<0.04 wt % SO3). The estimated magmatic sulfur contents for the fertile suites are 35 to 160 ppm, whereas for the barren suites, their related magmas were sulfate poor. Compared to the hydrous, oxidized, and S-rich fertile suites in the southern Yidun arc, the reduced and sulfate-poor characteristics of the barren suites hinder the transport of adequate S and metals to form porphyry Cu deposits, even though they are hydrous; thus there is little potential for porphyry Cu deposits in the northern Yidun arc. Whole-rock Sr/Y (>20), V/Sc (>32.5–0.385 × wt % SiO2), Eu/Eu* (~1) and 10,000*(Eu/Eu*)/Y (>400) ratios, zircon Eu/Eu* (>0.4) and ΔFMQ (>1), and apatite SO3 contents (>0.1 wt %) can help to discriminate porphyry Cu intrusions from barren granitoids in the Yidun arc, indicating their usefulness as porphyry Cu fertility indicators. The zircon Ce anomaly (Ce4+/Ce3+, Ce/Ce*, Ce/Nd), however, overlaps between the oxidized fertile and reduced barren suites, hampering its use to estimate relative magmatic redox state and as a robust porphyry Cu fertility indicator. The combination of whole-rock analyses and zircon and apatite compositions helps focus porphyry Cu exploration on prospective areas, coupled with investigations of structural geology, geophysical surveys, and mapping of hydrothermal alteration.

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Conference papers on the topic "Paleo-redox"

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He, Ruliang, Wanyi Lu, Christopher K. Junium, Charles Ver Straeten, and Zunli Lu. "PALEO-REDOX CONTEXT OF THE MID-DEVONIAN APPALACHIAN BASIN AND ITS RELEVANCE TO BIOCRISES." In Joint 69th Annual Southeastern / 55th Annual Northeastern GSA Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020se-343141.

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Yang, Rui, Sheng He, Qinhong Hu, and Dongfeng Hu. "PALEO-OCEAN REDOX ENVIRONMENTS OF BLACK ORGANIC-RICH SHALES IN FULING SHALE GAS FIELD, SICHUAN BASIN." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-278253.

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Wang, Yi, Wanyi Lu, Kassandra M. Costa, and Sune G. Nielsen. "BEYOND ANOXIA: EXPLORING SEDIMENTARY THALLIUM ISOTOPES IN PALEO-REDOX RECONSTRUCTIONS FROM A NEW CORE TOP COLLECTION." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-378423.

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Roué, Lucile, Florian Kurzweil, Martin Wille, Antje Wegwerth, Olaf Dellwig, Carsten Münker, and Ronny Schoenberg. "Combined stable W and Mo isotopic evidence for increasing redox-potentials from the Paleo- to Neoarchean Oceans." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6421.

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Bowman, Chelsie, Madeline Marshall, Madeline Marshall, Joshua M. Garber, Joshua M. Garber, Jeremy Owens, Jeremy Owens, et al. "INSIGHTS INTO PHOSPHOGENESIS FROM A MULTI-PROXY PALEO-REDOX RECONSTRUCTION OF THE PERMIAN PHOSPHORIA BASIN, IDAHO, USA." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-381810.

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Davies, Marissa A., Claudia J. Schröder-Adams, Jens O. Herrle, Peter Hülse, Simon Schneider, and Alex Quesnel. "BENTHIC FORAMINIFERAL MORPHOGROUP RESPONSE TO PALEO-REDOX CONDITIONS ACROSS THE CONIACIAN TO SANTONIAN “OAE 3” INTERVAL IN THE KANGUK FORMATION, CANADIAN ARCTIC ARCHIPELAGO." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-305457.

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