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Zeitschriftenartikel zum Thema „Datation au carbonate U-Pb“

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Veröffentlicht am 25. Mai 2024

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1

Jahn, Bor-ming, and Henri Cuvellier. "PbPb and UPb geochronology of carbonate rocks: an assessment." Chemical Geology 115, no. 1-2 (1994): 125–51. http://dx.doi.org/10.1016/0009-2541(94)90149-x.

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2

Cocherie, Alain, Jean Chantraine, C. Mark Fanning, et al. "Datation U/Pb : âge Briovérien de la série d'Erquy (Massif armoricain, France)." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 333, no. 8 (2001): 427–34. http://dx.doi.org/10.1016/s1251-8050(01)01669-x.

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3

Tartèse, Romain, and Ian C. Lyon. "In situ U–Pb dating of 4 billion-year-old carbonates in the martian meteorite Allan Hills 84001." Geochronology 4, no. 2 (2022): 683–90. http://dx.doi.org/10.5194/gchron-4-683-2022.

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Abstract. In situ carbonate U–Pb dating studies have proliferated dramatically in recent years. Almost all these studies have targeted relatively young terrestrial calcite up to Carboniferous in age. To assess the robustness of the carbonate U–Pb chronometer in deep time, we carried out in situ U–Pb analyses in magnesite–ankerite–calcite carbonates in the martian meteorite Allan Hills (ALH) 84001. Carbonates in ALH 84001 formed at ca. 3.94 Ga, and there is little evidence that much happened to this rock since then, making it an ideal sample to test the robustness of the U–Pb system in old carb

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4

Gorokhov, I. M., I. M. Vasil'eva, A. B. Kuznetsov, N. G. Rizvanova, and G. V. Konstantinova. "A Stepwise Dissolution Method Applied to Isotopic Chemostratigraphic and Geochronological Studies of Riphean Carbonate Rocks of the Baykit Uplift." Геохимия 68, no. 7 (2023): 669–86. http://dx.doi.org/10.31857/s0016752523070038.

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The potential of the stepwise dissolution analytical procedure to obtain chemostratigraphic and geochronological information is demonstrated by a case study of Riphean carbonate rocks of the Kamovskaya Group of the Baykit Uplift (Eastern Siberia). The procedures suggested for studying Rb–Sr and U–Pb systems in carbonate rocks included (1) selection of samples with the lowest 87Sr/86Sr ratio on the basis of preliminary Rb–Sr analysis of the collection using the routine procedure of bulk leaching in 0.1N CH3COOH; (2) detailed study of the Rb–Sr system in selected samples using two-step dissoluti

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5

Stifeeva, M. V., N. V. Vladykin, A. B. Kotov, et al. "AGE OF THE FORMATION OF EARLY PRECAMBRIAN CARBONATITES IN THE SOUTH-EASTERN PART OF THE CHARO-OLEKMINSKY GEOBLOCK, ALDAN SHIELD." Доклады Российской академии наук. Науки о Земле 508, no. 1 (2023): 32–36. http://dx.doi.org/10.31857/s2686739722601880.

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Presents the results of U–Pb geochronological (ID–TIMS) studies of garnet and U–Th–Pb (LA–ICP–MS) “screening” geochronological studies of zircon from pyroxene-carbonate rocks of the Ukduska massif. The U–Pb age of garnets (1881 ± 8 million years) and age of zircon rim (1865 ± 16 million years) indicate the early Proterozoic age of these rocks. The results of geochronological studies allow to identify a new stage of carbonate magmatism within the southeastern part of the Charo-Olekminsky geoblock.

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Cocherie, Alain, Catherine Guerrot, C. Mark Fanning, and Albert Genter. "Datation U–Pb des deux faciès du granite de Soultz (Fossé rhénan, France)." Comptes Rendus Geoscience 336, no. 9 (2004): 775–87. http://dx.doi.org/10.1016/j.crte.2004.01.009.

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7

Winter, Bryce L., and Clark M. Johnson. "UPb dating of a carbonate subaerial exposure event." Earth and Planetary Science Letters 131, no. 3-4 (1995): 177–87. http://dx.doi.org/10.1016/0012-821x(95)00026-9.

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8

Beranoaguirre, Aratz, Iuliana Vasiliev, and Axel Gerdes. "In situ LA-ICPMS U–Pb dating of sulfates: applicability of carbonate reference materials as matrix-matched standards." Geochronology 4, no. 2 (2022): 601–16. http://dx.doi.org/10.5194/gchron-4-601-2022.

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Abstract. Recent developments in analytical capabilities in the field of in situ laser ablation mass spectrometry (LA-ICPMS) have expanded the applications of U–Pb geochronometers in low-U minerals such as carbonates or garnets. The rapid evolution of the technique relies on well-characterized matrix-matched reference materials. In this article, we explore the suitability of using carbonate as an “almost-matrix-matched reference material” for in situ U–Pb dating of sulfates. For such purpose, we have used the astrochronologically dated gypsum and anhydrite samples deposited during the Messinia

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9

Rasbury, E. Troy, Theodore M. Present, Paul Northrup, et al. "Tools for uranium characterization in carbonate samples: case studies of natural U–Pb geochronology reference materials." Geochronology 3, no. 1 (2021): 103–22. http://dx.doi.org/10.5194/gchron-3-103-2021.

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Abstract. Laser ablation U–Pb analyses of carbonate (LAcarb) samples has greatly expanded the potential for U–Pb dating to a variety of carbonate-producing settings. Carbonates that were previously considered impossible to date using isotope dilution methods may preserve radiogenic domains that can be dated using spatially resolved laser ablation geochronology techniques. Work is ongoing to identify reference materials and to consider best practices for LAcarb. In this study we apply standard and emerging characterization tool sets on three natural samples with the dual goal of enhancing the s

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10

Vetrova, N. I., E. V. Vetrov та E. F. Letnikova. "СHEMOSTRATIGRAPHY OF THE CARBONATE DEPOSITS OF THE KINTEREP FORMATION IN NORTHWESTERN SALAIR: FIRST DATA". Geology and mineral resources of Siberia, № 2 (червень 2022): 10–23. http://dx.doi.org/10.20403/2078-0575-2022-2-10-23.

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The results of geochemical, isotope-geochemical (Sr, C, O) surveys of the Kinterep Formation carbonate deposits of Northwestern Salair and U-Pb dating (LA-ICP-MS) of zircons were given. Carbonate rocks represented by pure limestones are characterized by normal values of δ18OSMOW from 19.8 to 23.8 ‰ and δ13 CPDB from –0.7 to +0.9, the isotopic composition of Sr (87Sr/86Sr ratio) varies in a narrow range from 0.708486 to 0.708582.Using Sr and C isotope chemostratigraphy and U-Pb dating of zircons, age limits (525-510 Ma) were determined for the formation time of carbonate deposits of the Kintere

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11

Mangenot, Xavier, Marta Gasparrini, Axel Gerdes, Magali Bonifacie, and Virgile Rouchon. "An emerging thermochronometer for carbonate-bearing rocks: ∆47 /(U-Pb)." Geology 46, no. 12 (2018): 1067–70. http://dx.doi.org/10.1130/g45196.1.

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12

Roberts, Nick M. W., Kerstin Drost, Matthew S. A. Horstwood, et al. "Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb carbonate geochronology: strategies, progress, and limitations." Geochronology 2, no. 1 (2020): 33–61. http://dx.doi.org/10.5194/gchron-2-33-2020.

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Abstract. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb geochronology of carbonate minerals, calcite in particular, is rapidly gaining popularity as an absolute dating method. The high spatial resolution of LA-ICP-MS U–Pb carbonate geochronology has benefits over traditional isotope dilution methods, particularly for diagenetic and hydrothermal calcite, because uranium and lead are heterogeneously distributed on the sub-millimetre scale. At the same time, this can provide limitations to the method, as locating zones of radiogenic lead can be time-consuming and “h

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13

Woodhead, Jon, and Joseph Petrus. "Exploring the advantages and limitations of in situ U–Pb carbonate geochronology using speleothems." Geochronology 1, no. 1 (2019): 69–84. http://dx.doi.org/10.5194/gchron-1-69-2019.

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Abstract. The recent development of methods for in situ U–Pb age determination in carbonates has found widespread application, but the benefits and limitations of the method over bulk analysis (isotope dilution – ID) approaches have yet to be fully explored. Here we use speleothems – cave carbonates such as stalagmites and flowstones – to investigate the utility of in situ dating methodologies for “challenging” matrices with typically low U and Pb contents and predominantly late Cenozoic ages. Using samples for which ID data have already been published, we show that accurate ages can be obtain

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14

Vermeesch, Pieter. "Unifying the U–Pb and Th–Pb methods: joint isochron regression and common Pb correction." Geochronology 2, no. 1 (2020): 119–31. http://dx.doi.org/10.5194/gchron-2-119-2020.

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Abstract. The actinide elements U and Th undergo radioactive decay to three isotopes of Pb, forming the basis of three coupled geochronometers. The 206Pb ∕238U and 207Pb ∕235U decay systems are routinely combined to improve accuracy. Joint consideration with the 208Pb ∕232Th decay system is less common. This paper aims to change this. Co-measured 208Pb ∕232Th is particularly useful for discordant samples containing variable amounts of non-radiogenic (“common”) Pb. The paper presents a maximum likelihood algorithm for joint isochron regression of the 206Pb ∕238Pb, 207Pb ∕235Pb and 208Pb ∕232Th

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15

Davis, D. W., C. N. Sutcliffe, A. M. Thibodeau, et al. "Hydrochronology of a proposed deep geological repository for low- and intermediate-level nuclear waste in southern Ontario from U–Pb dating of secondary minerals: response to Silurian and Cretaceous events." Canadian Journal of Earth Sciences 57, no. 4 (2020): 464–76. http://dx.doi.org/10.1139/cjes-2019-0004.

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A record of fluid flow has been documented within a Paleozoic carbonate platform sequence by U–Pb dating of calcite in veins and vugs from rock core sampled through a shallowly dipping sequence of sedimentary rocks beneath the Bruce nuclear site, Ontario, Canada. Secondary calcite from >650 m deep Ordovician carbonate rocks yields a Silurian age of 434 ± 5 Ma possibly related to infiltration of seawater from overlying evaporitic basins as well as hydrothermal solutions that infiltrated from below. In contrast, near-surface Devonian rocks mostly give vein infill ages over the range of 80–100

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16

Gulbranson, Erik L., E. Troy Rasbury, Greg A. Ludvigson, et al. "U–Pb Geochronology and Stable Isotope Geochemistry of Terrestrial Carbonates, Lower Cretaceous Cedar Mountain Formation, Utah: Implications for Synchronicity of Terrestrial and Marine Carbon Isotope Excursions." Geosciences 12, no. 9 (2022): 346. http://dx.doi.org/10.3390/geosciences12090346.

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The terrestrial Lower Cretaceous Cedar Mountain Formation, Utah, is a critical archive of paleoclimate, tectonics, and vertebrate ecology and evolution. Early Cretaceous carbon cycle perturbations associated with ocean anoxia have been interpreted from this succession, as expressed in stable carbon isotopes. However, refining the timing of the observed stable isotope excursions remains a key challenge in understanding how marine anoxia affects the Earth system, and is ultimately recorded in the terrestrial realm. The geochronology and geochemistry of a terrestrial carbonate near the base of th

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17

Nuriel, Perach, Jörn-Frederik Wotzlaw, Maria Ovtcharova, et al. "The use of ASH-15 flowstone as a matrix-matched reference material for laser-ablation U − Pb geochronology of calcite." Geochronology 3, no. 1 (2021): 35–47. http://dx.doi.org/10.5194/gchron-3-35-2021.

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Abstract. Latest advances in laser ablation inductively coupled plasma mass spectrometer (LA-ICPMS) allow for accurate in situ U−Pb dating of carbonate material, with final age uncertainties usually >3 % 2σ. Cross-laboratory reference materials (RMs) used for sample-bracketing are currently limited to WC1 calcite with an age of 254.4±6.5 (2σ). The minimum uncertainty on any age determination with the LA-ICPMS method is therefore ≥2.5 %, and validation by secondary RMs is usually performed on in-house standards. This contribution presents a new reference material, ASH-15, a flowstone that is

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18

Kaurova, O. K., G. V. Ovchinnikova, and I. M. Gorokhov. "U-Th-Pb systematics of precambrian carbonate rocks: Dating of the formation and transformation of carbonate sediments." Stratigraphy and Geological Correlation 18, no. 3 (2010): 252–68. http://dx.doi.org/10.1134/s0869593810030032.

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19

Sitkina, D. R., A. B. Kuznetsov, G. V. Konstantinova, and T. L. Turchenko. "The Isotopic Age and Correlation of Carbonate Rocks of the Ara-Oshei Formation (Tunka Ridge, East Sayan)." Russian Geology and Geophysics 63, no. 8 (2022): 901–14. http://dx.doi.org/10.2113/rgg20214378.

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Abstract —We present results of Pb–Pb geochronology and Sr- and C- chemostratigraphic study of limestones and dolomites of the Ara-Oshei Formation of the Tunka ridge in East Sayan. The δ13C value of the limestones varies from –0.6 to 2.3‰ PDB, the 87Sr/86Sr ratio is within 0.70851–0.70864, and the Pb–Pb age is 521 ± 21 Ma (MSWD = 0.9). The δ13C value of the dolomites varies from –3.9 to 0.5‰ PDB, the 87Sr/86Sr ratio is 0.70844–0.70882, and the Pb–Pb age is 417 ± 8 Ma (MSWD = 2.5). The U–Pb isotope system of the dolomites was disturbed during the geologic evolution of the region, which led to t

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20

Scott, David J. "Geology, U – Pb, and Pb – Pb geochronology of the Lake Harbour area, southern Baffin Island: implications for the Paleoproterozoic tectonic evolution of northeastern Laurentia." Canadian Journal of Earth Sciences 34, no. 2 (1997): 140–55. http://dx.doi.org/10.1139/e17-012.

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Geological and geochronological results of an investigation of the Paleoproterozoic siliciclastic and carbonate supracrustal rocks of the Lake Harbour Group (LHG) and surrounding tonalitic gneisses on southern Baffin Island are presented. Conventional U – Pb geochronology of monazite from rocks of the LHG suggest that penetrative deformation of these rocks occurred prior to, or during, peak metamorphic conditions at ca. 1845 –1840 Ma. Conventional U – Pb zircon results indicate that much of the tonalitic gneiss ranges in age from [Formula: see text] to 1827[Formula: see text]. The tonalitic gn

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Essaifi, Abderrahim, Alain Potrel, Ramon Capdevila, and Jean-Louis Lagarde. "Datation UPb : âge de mise en place du magmatisme bimodal des Jebilet centrales (chaı̂ne Varisque, Maroc). Implications géodynamiques." Comptes Rendus Geoscience 335, no. 2 (2003): 193–203. http://dx.doi.org/10.1016/s1631-0713(03)00030-0.

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22

Cawood, Peter A., Jeroen A. M. van Gool, and Greg R. Dunning. "Geological development of eastern Humber and western Dunnage zones: Corner Brook–Glover Island region, Newfoundland." Canadian Journal of Earth Sciences 33, no. 2 (1996): 182–98. http://dx.doi.org/10.1139/e96-017.

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The Corner Brook–Glover Island region records the development of the internal domain of the Humber Zone and its relationship to the adjoining external domain and Dunnage Zone. The region preserves both the Laurentian margin basement–cover contact and the siliciclastic–carbonate transition within the cover sequence. Precambrian Grenville basement of the Corner Brook Lake Complex is the oldest lithostratigraphic unit and yielded a U/Pb zircon age of 1510 ± 6 Ma. Three main lithostratigraphic assemblages overlie basement: silicic and mafic igneous rocks of the Lady Slipper Pluton which yielded a

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23

Ghobadi, Mahdi, Gerhard P. Brey, Axel Gerdes, Heidi E. Höfer, and Jörg Keller. "Accessories in Kaiserstuhl carbonatites and related rocks as accurate and faithful recorders of whole rock age and isotopic composition." International Journal of Earth Sciences 111, no. 2 (2021): 573–88. http://dx.doi.org/10.1007/s00531-021-02130-9.

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AbstractThe accessories perovskite, pyrochlore, zirconolite, calzirtite and melanite from carbonatites and carbonate-rich foidites from the Kaiserstuhl are variously suited for the in situ determination of their U–Pb ages and Sr, Nd- and Hf-isotope ratios by LA-ICP-MS. The 143Nd/144Nd ratios may be determined precisely in all five phases, the 176Hf/177Hf ratios only in calzirtite and the 87Sr/86Sr ratios in perovskites and pyrochlores. The carbonatites and carbonate-rich foidites belong to one of the three magmatic groups that Schleicher et al. (1990) distinguished in the Kaiserstuhl on the ba

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24

Engel, John, Roland Maas, Jon Woodhead, Jan Tympel, and Alan Greig. "A single-column extraction chemistry for isotope dilution U-Pb dating of carbonate." Chemical Geology 531 (January 2020): 119311. http://dx.doi.org/10.1016/j.chemgeo.2019.119311.

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25

Smith, P. E., R. M. Farquhar, and R. G. Hancock. "Direct radiometric age determination of carbonate diagenesis using U-Pb in secondary calcite." Earth and Planetary Science Letters 105, no. 4 (1991): 474–91. http://dx.doi.org/10.1016/0012-821x(91)90186-l.

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26

Montano, Damaris, Marta Gasparrini, Sébastien Rohais, and Ramon De Luca. "A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)." Geosciences 13, no. 8 (2023): 227. http://dx.doi.org/10.3390/geosciences13080227.

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The Yacoraite Fm. (Salta rift basin, Argentina) consists of a mixed carbonate–siliciclastic lacustrine succession, interbedded with volcanic ash layers and organised in four third-order stratigraphic sequences. It is one of the few sites in South America that encompass the Cretaceous–Paleogene (K–Pg) transition, the position of which remains debated. Here, samples were collected along a depocentral stratigraphic section that was previously dated by zircon and carbonate U-Pb geochronology. The consistency between zircon and carbonate U-Pb ages, together with an accurate petrographic analysis, a

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Plášil, J., J. Čejka, J. Sejkora, et al. "Widenmannite, a rare uranyl lead carbonate: occurrence, formation and characterization." Mineralogical Magazine 74, no. 1 (2010): 97–110. http://dx.doi.org/10.1180/minmag.2010.074.1.97.

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AbstractThe rare uranyl lead carbonate widenmannite, Pb2(UO2)(CO3)3, was found at the Jánská vein, Příbram, Czech Republic, where two generations occur in several morphological types and mineral associations in hydrothermal veins. Alpha spectroscopy shows that these two generations have different ages, >220,000 and 118±12 y. ICP-MS analysis indicates that both widenmannites have a dominance of non-radiogenic Pb which originates from weathered galena. The older widenmannite I forms fine-grained, grey to beige aggregates in the highly altered supergene part of the hydrothermal ore vein in ass

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Alexandrov, Pavel, Jean-Pierre Floc'h, Michel Cuney, and Alain Cheilletz. "Datation U–Pb à la microsonde ionique des zircons de l'unité supérieure de gneiss dans le Sud Limousin, Massif central." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 332, no. 10 (2001): 625–32. http://dx.doi.org/10.1016/s1251-8050(01)01586-5.

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Letnikova, E. F., A. A. Zhdanov, A. V. Ivanov, et al. "Sr-ISOTOPIC COMPOSITION OF PALEOOCEAN WATER ON THE BORDER OF 960 Ma (DATA FOR NIZHNY TUNGUSKA FORMATION OF TURUKHAN UPLIFT OF SIBERIAN PLATFORM)." Доклады Российской академии наук. Науки о Земле 513, no. 1 (2023): 66–76. http://dx.doi.org/10.31857/s2686739723600960.

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At the boundary of the Meso- and Neoproterozoic, Grenville collision events were widely manifested on the margins of ancient continental blocks. Most of the sedimentary sequences that had accumulated by that time had undergone significant thermal–metamorphic changes. In many ways, this is the main reason for the lack of isotopic data for carbonate deposits in the interval of 1200–900 Ma in world practice. Sr–isotopic composition in carbonate rocks with an age of 980–920 Ma was determined in the only section of the World – the Huainan Formation of the North China Platform with accumulation time

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Bonev, Nikolay, Petyo Filipov, Raya Raicheva, Massimo Chiaradia, and Robert Moritz. "Detrital zircon age and Sr isotopic constraints for a Late Palaeozoic carbonate platform in the lower Rhodope thrust system, Pirin, SW Bulgaria." Geological Magazine 156, no. 12 (2019): 2117–24. http://dx.doi.org/10.1017/s0016756819001183.

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AbstractWe focused on the Pirin–Pangeon–Thasos carbonate sequence of the Rhodope thrust system, combining Sr isotopes from marble with U–Pb dating of detrital zircons from interlayered schists with outcrop near the villages of Ilindentsi and Petrovo in Bulgaria. The youngest zircon age at Ilindentsi is 266 Ma, i.e. Middle Permian, while the youngest zircon at Petrovo yielded an age of 290 Ma, i.e. Early Permian. Strontium isotopes range from 0.707420 to 0.707653, and are consistent with a Middle Permian maximum depositional age. Middle Permian sedimentation of this carbonate platform most like

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Wei, Zhenquan, Jinfeng Ma, Gaowen He, Lifeng Zhong, Limin Zhang, and Bin Zhao. "Laser In Situ U–Pb Isotope Dating of Carbonate Rocks in Weijia Guyot in the Western Pacific Ocean and Its Geological Significance." Journal of Marine Science and Engineering 12, no. 5 (2024): 737. http://dx.doi.org/10.3390/jmse12050737.

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Shallow-water carbonate rocks constitute a crucial component of large guyots, arising in distinct environments and harboring valuable insights into the evolutionary stages of seamount islands as well as the tectonic conditions of the underlying oceanic plate. Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS) was used to conduct in situ U–Pb isotope dating of carbonate minerals with low uranium content collected from Weijia Guyot. This dating approach yielded crucial evidence for the vertical development of the seamount. Our study indicates that shallow-

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Lenoir, Louise, Thomas Blaise, Andréa Somogyi, et al. "Uranium incorporation in fluorite and exploration of U–Pb dating." Geochronology 3, no. 1 (2021): 199–227. http://dx.doi.org/10.5194/gchron-3-199-2021.

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Abstract. The age of ore deposits constitutes a decisive element in understanding their formation. Deciphering their precise chronology may be a challenge in the absence of mineral phases that can be dated by conventional geochronometers. Fluorite is very common either as the major or accessory mineral in a wide variety of ores and may provide information regarding the origin and timing of mineralizing fluid flows. In this contribution, we explore U–Pb dating on fluorite crystals from the world-class carbonate strata-bound fluorite ore of Pierre-Perthuis in Burgundy (Morvan massif, France). Th

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Shabaga, Brandi M., Mostafa Fayek, David Quirt, Charlie W. Jefferson, and Alfredo Camacho. "Mineralogy, geochronology, and genesis of the Andrew Lake uranium deposit, Thelon Basin, Nunavut, Canada." Canadian Journal of Earth Sciences 54, no. 8 (2017): 850–68. http://dx.doi.org/10.1139/cjes-2017-0024.

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The Thelon Basin located in Nunavut, Canada, shares many similarities with the U-producing Athabasca Basin in Saskatchewan. The Kiggavik project area, located near the northeastern edge of the Thelon Basin, contains U deposits and showings along the ∼30 km long NE–SW Kiggavik – Andrew Lake structural trend. The Andrew Lake deposit is near the southern end of this trend. Pre-mineralization is characterized by quartz ± carbonate veins that occupy fault systems later reactivated as conduits for U-mineralizing fluids. A four-phase genetic model is proposed for the Andrew Lake deposit. Phase 1 comp

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Jin, Xiao-Ye, Jian-Xin Zhao, Yue-Xing Feng, et al. "CALCITE U-Pb DATING UNRAVELS THE AGE AND HYDROTHERMAL HISTORY OF THE GIANT SHUIYINDONG CARLIN-TYPE GOLD DEPOSIT IN THE GOLDEN TRIANGLE, SOUTH CHINA." Economic Geology 116, no. 6 (2021): 1253–65. http://dx.doi.org/10.5382/econgeo.4870.

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Abstract The ages of Carlin-type gold deposits in the Golden Triangle of South China have long been questioned due to the general lack of minerals unequivocally linked to gold deposition that can be precisely dated using conventional radiogenic isotope techniques. Recent advances in U-Pb methods show that calcite can be used to constrain the ages of hydrothermal processes, but few studies have been applied to ore deposits. Herein, we show that this approach can be used to constrain the timing of hydrothermal activity that generated and overprinted the giant Shuiyindong Carlin-type gold deposit

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Park, Yuem, Nicholas L. Swanson-Hysell, Scott A. MacLennan, et al. "The lead-up to the Sturtian Snowball Earth: Neoproterozoic chemostratigraphy time-calibrated by the Tambien Group of Ethiopia." GSA Bulletin 132, no. 5-6 (2019): 1119–49. http://dx.doi.org/10.1130/b35178.1.

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Abstract The Tonian-Cryogenian Tambien Group of northern Ethiopia is a mixed carbonate-siliciclastic sequence that culminates in glacial deposits associated with the first of the Cryogenian glaciations—the Sturtian “Snowball Earth.” Tambien Group deposition occurred atop arc volcanics and volcaniclastics of the Tsaliet Group. New U-Pb isotope dilution–thermal ionization mass spectrometry (ID-TIMS) dates demonstrate that the transition between the Tsaliet and Tambien Groups occurred at ca. 820 Ma in western exposures and ca. 795 Ma in eastern exposures, which is consistent with west to east arc

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Drost, Kerstin, David Chew, Joseph A. Petrus, et al. "An Image Mapping Approach to U-Pb LA-ICP-MS Carbonate Dating and Applications to Direct Dating of Carbonate Sedimentation." Geochemistry, Geophysics, Geosystems 19, no. 12 (2018): 4631–48. http://dx.doi.org/10.1029/2018gc007850.

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Lan, Zhongwu, Nick M. W. Roberts, Ying Zhou, Shujing Zhang, Zhensheng Li, and Taiping Zhao. "Application of in situ U-Pb carbonate geochronology to Stenian-Tonian successions of North China." Precambrian Research 370 (March 2022): 106551. http://dx.doi.org/10.1016/j.precamres.2021.106551.

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Parrish, Judith Totman, E. Troy Rasbury, Marjorie A. Chan, and Stephen T. Hasiotis. "Earliest Jurassic U-Pb ages from carbonate deposits in the Navajo Sandstone, southeastern Utah, USA." Geology 47, no. 11 (2019): 1015–19. http://dx.doi.org/10.1130/g46338.1.

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Abstract New uranium-lead (U-Pb) analyses of carbonate deposits in the Navajo Sandstone in southeastern Utah (USA) yielded dates of 200.5 ± 1.5 Ma (earliest Jurassic, Hettangian Age) and 195.0 ± 7.7 Ma (Early Jurassic, Sinemurian Age). These radioisotopic ages—the first reported from the Navajo erg and the oldest ages reported for this formation—are critical for understanding Colorado Plateau stratigraphy because they demonstrate that initial Navajo Sandstone deposition began just after the Triassic and that the base of the unit is strongly time-transgressive by at least 5.5 m.y.

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Kim, Ha, Seongsik Hong, Chaewon Park, Jihye Oh, Jonguk Kim, and Yungoo Song. "Principle and Application of 'Image-mapping' in-situ U-Pb Carbonate Age-dating." Economic and Environmental Geology 56, no. 2 (2023): 115–23. http://dx.doi.org/10.9719/eeg.2023.56.2.115.

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Georgieva, Sylvina, Rossitsa Vassileva, and Georgi Milenkov. "Mineral association in pegmatites from the Djurkovo Pb-Zn deposit, Central Rhodopes: preliminary results." Review of the Bulgarian Geological Society 83, no. 3 (2022): 19–22. http://dx.doi.org/10.52215/rev.bgs.2022.83.3.19.

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Deformed pegmatites of varying thickness and position are a significant constituent intruded in the metamorphic complex, hosting the Djurkovo Pb-Zn deposit in Central Rhodopes. The mineral composition of the pegmatites consists of plagioclase, K-feldspar, quartz, and minor micas. The main accessory minerals are allanite, titanite, apatite and zircon. Late hydrothermal alteration of pegmatites led to the formation of epidote, adularia, sericite, chlorite, carbonate, quartz and leucoxene. Rare earth carbonate-phosphate assemblage (REE+Y, Th, U), manifested as ˂ 20 µm anhedral grains, is observed

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Lancelot, J., and V. Vella. "Datation U-Pb liasique de la pechblende de Rabejac; mise en evidence d'une preconcentration uranifere permienne dans le Bassin de Lodeve (Herault)." Bulletin de la Société Géologique de France V, no. 2 (1989): 309–15. http://dx.doi.org/10.2113/gssgfbull.v.2.309.

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Dawson, J. B., and R. W. Hinton. "Trace-element content and partitioning in calcite, dolomite and apatite in carbonatite, Phalaborwa, South Africa." Mineralogical Magazine 67, no. 5 (2003): 921–30. http://dx.doi.org/10.1180/0026461036750151.

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AbstractA carbonatite sample from Phalaborwa, South Africa, consists of apatite, magnetite and a calcitedolomite ‘perthite’ which is interpreted as being due to exsolution of dolomite from a high-Mg calcite precursor. Carbon and oxygen isotope data indicate that the carbonates are equilibrated. In situ ionmicroprobe analyses for Fe, Mn, Na, Si, Y, the REEs, Pb, Th and U give the following average concentrations (in ppm) in the sequence apatite, calcite, dolomite: Fe 98, 1680, 8190; Mn 61, 510, 615; Na 1171, 627, 125; Si 368; 1.6, 0.2; Sr 4447, 5418, 2393; Ba 37, 2189, 75; La 1245, 300, 67; Y 1

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Guillong, Marcel, Jörn-Frederik Wotzlaw, Nathan Looser, and Oscar Laurent. "Evaluating the reliability of U–Pb laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) carbonate geochronology: matrix issues and a potential calcite validation reference material." Geochronology 2, no. 1 (2020): 155–67. http://dx.doi.org/10.5194/gchron-2-155-2020.

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Abstract. We document that the reliability of carbonate U–Pb dating by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is improved by matching the aspect ratio of the LA single-hole drilling craters and propagating long-term excess variance and systematic uncertainties. We investigated the impact of different matrices and ablation crater geometries using U–Pb isotope analyses of one primary (WC-1) and two secondary reference materials (RMs). Validation RMs (VRMs) include a previously characterised one (ASH-15D) and a new candidate (JT), characterised by ID-TIMS (interce

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Khotylev, A. O., N. B. Devisheva, Al V. Tevelev, and V. M. Moseichuk. "The first data on possible Mezozoic magmatism within the Western slope of the Southern Urals." Moscow University Bulletin. Series 4. Geology, no. 5 (October 28, 2018): 24–34. http://dx.doi.org/10.33623/0579-9406-2018-5-24-34.

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Within the Western slope of the Southern Urals, there are plenty of basite dyke complexes of Riphean to Vendian among Precambrian terrigenous-carbonate formations. In metamorphic formations of the Taratash complex (Archean to Early Proterozoic, the northern closure of the Bashkirian meganticlinorium) there was observed the andesitic dyke with isotopic age of 71±1 Ma (U-Pb SHRIMP II on zircons) and near Bakal two bodies of gabbroids with zircons of similar ages were found. These are the first evidence of possible Mezozoic magmatism in this region.

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Kuzyura, A. V., F. Wall, T. Jeffries, and Yu A. Litvin. "Partitioning of trace elements between garnet, clinopyroxene and diamond-forming carbonate-silicate melt at 7 GPa." Mineralogical Magazine 74, no. 2 (2010): 227–39. http://dx.doi.org/10.1180/minmag.2010.074.2.227.

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AbstractConcentrations of trace elements in coexisting garnet, clinopyroxene and completely miscible carbonate-silicate melt (formed at 7 GPa from the Chagatai silicocarbonatite rock known to be diamondiferous) were determined using LA-ICP-MS. The partition coefficients for Li, Rb, Cs, Ba, Th, U, Ta, Nb, La, Ce, Pb, Pr, Sr, Nd, Zr, Hf, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb, Lu, Sc and Zn were determined. The new experimental data for trace-element partitioning between garnet, clinopyroxene and carbonate-silicate melt have been compared with published data for partitioning between garnet, clino

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Georgieva, Hristiana, Rossen Nedialkov, Elitsa Stefanova, Georgi Milenkov, Ivan Krumov, and Neven Georgiev. "Preliminary data on the mineral chemistry of garnet from the skarn alteration associated with the Elatsite porphyry-copper gold deposit, Bulgaria." Review of the Bulgarian Geological Society 84, no. 3 (2023): 31–34. http://dx.doi.org/10.52215/rev.bgs.2023.84.3.31.

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The skarn alteration is poorly preserved at the Elatsite, restricted to the hornfelses from the East, Southeast and Southern part of the deposit. The rocks are defined as exoskarns, with a mineral composition including garnets, epidote, pyroxene, amphiboles, carbonates, prehnite, quartz, sulphides. The newly formed minerals occur in poorly preserved layers. The garnet grains are subhedral with inclusions of epidote and quartz, while some of them are corrode with carbonate and zeolites formed in the fractures. The garnets are grossular-andradite type, with higher values for HREE over LREE, and

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Zou, Yu, Donghua You, Bo Chen, et al. "Carbonate U-Pb Geochronology and Clumped Isotope Constraints on the Origin of Hydrothermal Dolomites: A Case Study in the Middle Permian Qixia Formation, Sichuan Basin, South China." Minerals 13, no. 2 (2023): 223. http://dx.doi.org/10.3390/min13020223.

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Reservoirs in the dolomites of the Middle Permian Qixia Formation in the Sichuan Basin are currently important oil and gas exploration objects in China. However, the questions concerning the sources of the dolomitized fluids and the control factors of the Qixia hydrothermal dolomites remain unclear. In this study, the original hydrothermal dolomites (the replacement dolomites (RDs) and saddle dolomites (SDs)) from the Qixia Formation in the southwestern Sichuan Basin (the PR1 well and Baoxing section) were mainly examined using novel in situ carbonate U-Pb dating with clumped isotopes (∆47). O

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Duff, Martine C., Caroline F. V. Mason, and Douglas B. Hunter. "Comparison of acid and base leach for the removal of uranium from contaminated soil and catch-box media." Canadian Journal of Soil Science 78, no. 4 (1998): 675–83. http://dx.doi.org/10.4141/s97-059.

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Several leach solutions have been developed for the removal of uranium (U) from contaminated media such as soil and military catch-box sand used for the ballistics testing of U-containing projectiles. Leach solutions of concentrated sulfuric acid and of carbonate (with and without oxidants such as peroxides) have also been used in the mining of U from high-grade ore deposits. Many of these solutions have been used at U-contaminated environmental sites with varying degrees of success. Batch leaches with six characterized U-contaminated media and seven leach solutions were conducted. After the l

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Mottram, C. M., D. A. Kellett, T. Barresi, et al. "Syncing fault rock clocks: Direct comparison of U-Pb carbonate and K-Ar illite fault dating methods." Geology 48, no. 12 (2020): 1179–83. http://dx.doi.org/10.1130/g47778.1.

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Abstract The timing of slip on brittle faults in Earth’s upper crust is difficult to constrain, and direct radiometric dating of fault-generated materials is the most explicit approach. Here we make a direct comparison between K-Ar dating of fault gouge clay (authigenic illite) and U-Pb dating of carbonate slickenfibers and veins from the same fault. We have dated fault generated materials from the Big Creek fault, a northwest-striking, dextral strike-slip fault system in Yukon Territory, Canadian Cordillera. Both methods yielded dates at ca. 73 Ma and ca. 60–57 Ma, representing at least two p

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Munksgaard, Niels C., Yasmin Antwertinger, and David L. Parry. "Laser Ablation ICP-MS Analysis of Faviidae Corals for Environmental Monitoring of a Tropical Estuary." Environmental Chemistry 1, no. 3 (2004): 188. http://dx.doi.org/10.1071/en04058.

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Environmental Context: The composition of calcium carbonate in annual skeletal growth bands reflects the environmental conditions in which coral grows, enabling their use as long-term bio-monitors and archives of environmental conditions. Such archives will provide a baseline against which recent and future pollutant levels can be compared. Abstract: An LA-ICP-MS linescan procedure has been developed for the determination of sub-millimetre scale elemental compositions of Al, Ba, Cu, La, Mg, Mn, Pb, Rb, Sr, U, and Zn in corallite walls of Faviidae corals, with the aim of establishing coral-base

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