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Thematische Bibliographien / 86Sr e 143Nd / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „86Sr e 143Nd“

Autor: Grafiati

Veröffentlicht am 7. September 2021

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1

Huang, De Zhi, Xian Ying Wang, Guo Ming Li, et al. "Samarium-Neodymium and Strontium Systematics Applied to Calcite Veins in Dabashan Thrust and Fold Belt in China: Dating and Tracing of the Fluid." Advanced Materials Research 455-456 (January 2012): 1552–60. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.1552.

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Dabashan Thrust and Fold Belt is situated in the transfer zone between Qinling Orogen and Sichuan Basin, where multi-generation calcite veins were developed. Two kinds of veins, bedding-parallel and fracture-filled veins, were collected for analyses of rare-earth elements (REE), samarium-neodymium and strontium isotopes. The total REE contents of the calcites from the bedding-parallel vein are much higher than those from fracture-filled veins and are rich in light REE (LREE). The chondrite-normalized patterns of REE curves of the calcites from fracture-filled veins are flatten. The 87Sr/86Sr a

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2

Spišiak, Ján, Anna Vozárová, Jozef Vozár, Štefan Ferenc, Viera Šimonová, and Juraj Butek. "Implication of Mineralogy and Isotope Data on the Origin of the Permian Basic Volcanic Rocks of the Hronicum (Slovakia, Western Carpathians)." Minerals 11, no. 8 (2021): 841. http://dx.doi.org/10.3390/min11080841.

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The paper presents new geochemical data of the basic to intermediate volcanic rocks from the Hronic unit. The studied rocks are strongly altered and the primary mineral composition (clinopyroxenes, amphiboles, spinels, biotites, and plagioclases) is preserved only in some localities. The clinopyroxene corresponds to augite and primary amphiboles to pargasites. Spinels have a chemical composition similar to spinels from volcanic rocks. According to chemical composition, the studied basalts correspond to rift-related continental tholeiites. 143Nd/144Nd vs. 87Sr/86Sr isotopic ratios of the basalt

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3

Bertram, C. J., H. Elderfield, R. J. Aldridge, and S. Conway Morris. "87Sr/86Sr,143Nd/144Nd and REEs in Silurian phosphatic fossils." Earth and Planetary Science Letters 113, no. 1-2 (1992): 239–49. http://dx.doi.org/10.1016/0012-821x(92)90222-h.

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4

Fallick, A. E., and P. J. Hamilton. "The isotopic geochemistry of ocean waters through time." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 80, no. 3-4 (1989): 177–81. http://dx.doi.org/10.1017/s0263593300028613.

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ABSTRACTThere is a general consensus that the global chemistry of ocean water has not changed markedly during the Phanerozoic. Nevertheless, significant changes have occurred in the geochemical cycles of some elements and patterns of change have been reconstructed, in various forms, through consideration of the isotope ratios 13C/12C, 34S/32S, 87Sr/86Sr and 143Nd/144Nd. There have also been attempts to constrain variations in the isotopic composition of sea water itself through measurements of D/H and 18O/16O, the latter both directly and indirectly. Dissolved constituents in seawater display

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5

Ronkin, Yu L., I. S. Chashchukhin, and V. N. Puchkov. "Spinel lherzolites of the Northern Kraka massif (Southern Urals): first REE ID-ICP-MS,87Sr/86Sr AND147Sm-143Nd AL ID-TIMS isotope constrains." Доклады Российской академии наук. Науки о Земле 514, no. 1 (2024): 77–88. http://dx.doi.org/10.31857/s2686739724010092.

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The results of a REE ID-ICP-MS,86Sr/87Sr and147Sm-143Nd AL ID-TIMS study of the isotope systematics of spinel lherzolites from the northern Kraka massif, which is part of the largest (more than 900 km2) lherzolite allochthon thrust over the bathyal and shelf deposits of the passive continental margin, East European platform are presented. As a result, an isochron dependence (MSWD = 0.85) was revealed for the first time, which determines the age of 545±26 Ma and the high value of the initial ratio (143Nd/144Nd)0 = 0.512390±0.000054, corresponding, within the framework of model representations,

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Verma, Surendra P., and James F. Luhr. "Sr-Nd-Pb isotope and trace element geochemistry of calc -alkaline andesites from Volcán Colima, Mexico." Geofísica Internacional 32, no. 4 (1993): 617–31. http://dx.doi.org/10.22201/igeof.00167169p.1993.32.4.607.

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Se reportan los datos de elementos traza y las composiciones isotópicas de Sr, Nd y Pb en andesitas calco-alcalinas del Volcán Colima y se comparan con otros centros volcánicos del Cinturón Volcánico Mexicano. Los patrones de elementos de Tierras Raras normalizados con respecto a condritas demuestran un enriquecimiento en Tierras Raras ligeras y anomalías despreciables de Eu. Otros diagramas multi-elementos normalizados con respecto a MORB y manto "primitivo" demuestran anomalías negativas de Ta y Ti en las andesitas de Colima. Las relaciones isotópicas varían de 0.70355-0.70358 para 87Sr/86Sr

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Soloshenko, N. G., M. V. Streletskaya, M. V. Chervyakovskaya, and D. V. Kiseleva. "Implementation and experience of using methods for analyzing the isotopic composition of Sm and Nd, Rb and Sr in rock samples at the Geoanalitik Center for Collective Use." LITHOSPHERE (Russia) 24, no. 2 (2024): 364–75. http://dx.doi.org/10.24930/1681-9004-2024-24-2-364-375.

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Research subject. AGV-2 and BHVO-2 geochemical reference materials for studying the Sm, Nd and Rb, Sr isotope systems along with various rocks and mineral samples. Materials and Methods. An analysis of the isotopic composition of Sm, Nd and Rb, Sr was carried out using Neptune Plus and Triton Plus mass spectrometers. Aim. To implement analytical techniques for the isotopic composition of Sm and Nd, Rb, and Sr in various rock and mineral samples using two types of multicollector mass spectrometers – inductively coupled plasma NeptunePlus and thermal ionization TritonPlus (Thermo-Fisher), as wel

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8

Skála, Roman, Jaromír Ulrych, Lukáš Ackerman, et al. "Upper Cretaceous to Pleistocene melilitic volcanic rocks of the Bohemian Massif: petrology and mineral chemistry." Geologica Carpathica 66, no. 3 (2015): 197–216. http://dx.doi.org/10.1515/geoca-2015-0020.

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Abstract Upper Cretaceous to Pleistocene volcanic rocks of the Bohemian Massif represent the easternmost part of the Central European Volcanic Province. These alkaline volcanic series include rare melilitic rocks occurring as dykes, sills, scoria cones and flows. They occur in three volcanic periods: (i) the Late Cretaceous to Paleocene period (80–59 Ma) in northern Bohemia including adjacent territories of Saxony and Lusatia, (ii) the Mid Eocene to Late Miocene (32.3–5.9 Ma) period disseminated in the Ohře Rift, the Cheb–Domažlice Graben, Vogtland, and Silesia and (iii) the Early to Late Plei

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Mora, J. C., J. L. Macías, A. García-Palomo, et al. "Petrology and geochemistry of the Tacana Volcanic Complex, Mexico-Guatemala: Evidence for the last 40 000 yr of activity." Geofísica Internacional 43, no. 3 (2004): 331–59. http://dx.doi.org/10.22201/igeof.00167169p.2004.43.3.963.

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El Complejo Volcanico Tacaná (CVT) se localiza en el límite entre México y Guatemala y descansa sobre rocas metamórficas Mesozoicas e ígneas Terciarias. El CVT consiste de tres edificios volcanicos alineados de NE a SO que son Chichuj, Tacaná y San Antonio. El volcán Chichuj se encuentra constituido principalmente por flujos de lavas de composición andesftica (59-63 wt.% SiO2). El edificio del Tacanná está constituido por flujos de lava de composición basáltico-andesitica (56-61 wt% SiO2) y por domos de andesítica y dacítica (61-64 wt.% SiO2). Los flancos del edificio está cubiertos por depósi

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Ронкин, Ю. Л., И. В. Семенов та В. Н. Пучков. "RB-SR- И 147SM-143ND-СИСТЕМАТИКА ГАББРО И ДОЛЕРИТОВ ИЗ ФРАГМЕНТОВ ОФИОЛИТОВОЙ АССОЦИАЦИИ СРЕДНЕГО УРАЛА, "Доклады Академии наук"". Доклады Академии Наук, № 2 (2017): 204–10. http://dx.doi.org/10.7868/s0869565217320159.

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Рассмотрены результаты Rb-Sr-, 147Sm-143Nd-датирования комплекса параллельных долеритовых даек и пород Платиноносного пояса Урала в Тагильском сегменте палеоокеанической спрединговой структуры среднего Урала. Rb-Sr-систематика для габбро выявляет эррохронные зависимости, определяющие возрасты 415 и 345 млн лет при (87Sr/86Sr)0 0,70385±0,00068 и 0,7029±0,0010, соответственно.Изохронные 147Sm-143Nd-датировки демонстрируют определённое совпадение хронометрических возрастов долеритов дайкового комплекса (426±54; 426±34; 424±19 млн лет) и габбро самого Ревдинского габбро-гипербазитового массива (43

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Kim, Tae-Hyeon, Seung-Gu Lee, and Jae-Young Yu. "REE and Sr–Nd Isotope Characteristics of Cambrian–Ordovician Carbonate in Taebaek and Jeongseon Area, Korea." Minerals 11, no. 3 (2021): 326. http://dx.doi.org/10.3390/min11030326.

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Carbonate formations of the Cambro-Ordovician Period occur in the Taebaek and Jeongseon areas, located in the central–eastern part of the Korean Peninsula. This study analyzed the rare earth element (REE) contents and Sr–Nd isotope ratios in these carbonates to elucidate their depositional environment and diagenetic history. The CI chondrite-normalized REE patterns of the carbonates showed negative Eu anomalies (EuN/(SmN × GdN)1/2 = 0.50 to 0.81), but no Ce anomaly (Ce/Ce* = CeN/(LaN2 × NdN)1/3 = 1.01 ± 0.06). The plot of log (Ce/Ce*) against sea water depth indicates that the carbonates were

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12

Zhong, Yun, Xu Zhang, Zhilei Sun, et al. "Sr–Nd–Pb–Hf Isotopic Constraints on the Mantle Heterogeneities beneath the South Mid-Atlantic Ridge at 18–21°S." Minerals 10, no. 11 (2020): 1010. http://dx.doi.org/10.3390/min10111010.

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In an attempt to investigate the nature and origin of mantle heterogeneities beneath the South Mid-Atlantic Ridge (SMAR), we report new whole-rock Sr, Nd, Pb, and Hf isotopic data from eight basalt samples at four dredge stations along the SMAR between 18°S and 21°S. Sr, Nd, and Pb isotopic data from SMAR mid-ocean ridge basalts (MORBs) at 18–21°S published by other researchers were also utilized in this study. The SMAR MORBs at 18–21°S feature the following ratio ranges: 87Sr/86Sr = 0.70212 to 0.70410, 143Nd/144Nd = 0.512893 to 0.513177, 206Pb/204Pb = 18.05 to 19.50, 207Pb/204Pb = 15.47 to 15

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13

Brown, P. E., I. B. Evans, and S. M. Becker. "Alkaline basaltic volcanism in the Tertiary of central East Greenland—the Trekantnunatakker." Transactions of the Royal Society of Edinburgh: Earth Sciences 90, no. 2 (1999): 165–72. http://dx.doi.org/10.1017/s0263593300007215.

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AbstractThe Trekantnunatakker rise from the inland ice NW of the head of Kangerlussuaq fjord on the Blosseville Coast of central East Greenland. In these nunataks the main sequence of Tertiary flood basalts is overlain by picritic and ankaramitic lavas. These mildly alkaline lavas have lower 143Nd/144Nd and higher 87Sr/86Sr than the tholeiitic flood basalts. Their isotopic and incompatible element characteristics are similar to those of moderately enriched ocean island basalts, and comparable to the alkaline lavas of the nearby Prinsen af Wales Bjerge. The Trekantnunatakker lavas were the resu

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Besch, Thomas, Surendra P. Verma, Ulrich Kramm, Jörg F. W. Negendank, Heiner J. Tobschall, and Rolf Emmermann. "Assimilation of sialic crustal material by volcanics of the easternmost extension of the Trans-Mexican Volcanic Belt Evidence from Sr and Nd isotopes." Geofísica Internacional 34, no. 3 (1995): 263–81. http://dx.doi.org/10.22201/igeof.00167169p.1995.34.3.716.

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Las rocas volcánicas basálticas hasta riolíticas, de edad Plioceno al Cuaternario, provenientes de la parte extrema, oriental de la Faja Volcánica Trans-Mexicana (FVTM), se caracterizan por 87Srf/86Sr de 0.70342 a 0.70511 y 143Nd/144Nd de 0.51250 a 0.51287. Dado que las rocas volcánicas son muy jóvenes (de edad Plioceno al Cuaternario), se pueden considerar estas relaciones isotópicas medidas como las iniciales. Estos isótopos se correlacionan negativamente y, con una excepción, caen en el campo del 'arreglo del manto'. La variación isotópica no se puede explicar por modelos binaries sencillos

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15

Palacz, Z. A., and S. R. Tait. "Isotopic and geochemical investigation of unit 10 from the Eastern Layered Series of the Rhum Intrusion, Northwest Scotland." Geological Magazine 122, no. 5 (1985): 485–90. http://dx.doi.org/10.1017/s0016756800035408.

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AbstractSr and Nd isotopic compositions together with whole rock Sr and Nd abundances and olivine compositions are presented for cumulates from unit 10 of the Eastern Layered Series of the Rhum intrusion, Northwest Scotland.The results show an Nd–Sr isotopic correlation consistent with contamination by high 87Sr/86Sr, low 143Nd/144Nd crust. There is a strong correlation between the degree of contamination, Sr and Nd whole rock abundance and Fe enrichment in cumulus olivine. The allivalites are the most contaminated, while the basal peridotites are uncontaminated. This suggests that the cumulat

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ŞEN, PINAR ALICI, ABİDİN TEMEL, and ALAIN GOURGAUD. "Petrogenetic modelling of Quaternary post-collisional volcanism: a case study of central and eastern Anatolia." Geological Magazine 141, no. 1 (2004): 81–98. http://dx.doi.org/10.1017/s0016756803008550.

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Extensive continental collision-related volcanism occurred in Turkey during Neogene–Quaternary times. In central Anatolia, calc-alkaline to alkaline volcanism began in the Middle–Late Miocene. Here we report trace elemental and isotopic data from Quaternary age samples from central and eastern Anatolia. Most mafic lavas from central Anatolia are basalt and basaltic andesite, with lesser amounts of basaltic trachyandesite and andesite. All magma types exhibit enrichment in LILE (Sr, Rb, Ba and Pb) relative to HFSE (Nb, Ta). Trace element patterns are characteristic of continental margin volcani

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Timmermans, Ann C., Brian L. Cousens, and Christopher D. Henry. "Geochemical study of Cenozoic mafic volcanism in the west-central Great Basin, western Nevada, and the Ancestral Cascades Arc, California." Geosphere 16, no. 5 (2020): 1179–207. http://dx.doi.org/10.1130/ges01535.1.

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Abstract Processes linked to shallow subduction, slab rollback, and extension are recorded in the whole-rock major-, trace-element, and Sr, Nd, and Pb isotopic compositions of mafic magmatic rocks in both time and space over southwestern United States. Eocene to Mio-Pliocene volcanic rocks were sampled along a transect across the west-central Great Basin (GB) in Nevada to the Ancestral Cascade Arc (ACA) in the northern Sierra Nevada, California (∼39°–40° latitude), which are interpreted to represent a critical segment of a magmatic sweep that occurred as a result of subduction from east-northe

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Hölzl, Stephan. "Heavy elem ents’ isotope ratios in archaeometry." Revista do Museu de Arqueologia e Etnologia. Suplemento, supl.2 (December 10, 1997): 181. http://dx.doi.org/10.11606/issn.2594-5939.revmaesupl.1997.113450.

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Nas últimas décadas, os métodos químicos vem ganhando importância na Arqueologia. São usados para a determinação de proveniência sensu latu: para a identificação das origens de qualquer material (matérias-primas, artefatos, vestígios humanos e animais), relações comerciais, questões paleoambientais e questões nutricionais. Os elementos químicos, entretanto, tendem freqüentemente a fraccionar durante o enterramento e a mineralisação, de acordo com o seu comportamento geoquímico. Mesmo as medidas de freqüência de isótopos de elementos leves (C.N.O.) podem indicar os efeitos de isótopos que també

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Tanaka, Tsuyoshi, Naoyuki Ando, Hikari Kamioka, and Shigeko Togashi. "Chemical compositions and 138Ce/142Ce,143Nd/144Nd and 87Sr/86Sr ratios of Takla Makan desert sand." Journal of the Mass Spectrometry Society of Japan 38, no. 3 (1990): 133–41. http://dx.doi.org/10.5702/massspec.38.133.

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Lee, Hyo Min, Seung-Gu Lee, Hyeoncheol Kim, Jong Ik Lee, and Mi Jung Lee. "REE Tetrad Effect and Sr-Nd Isotope Systematics of A-Type Pirrit Hills Granite from West Antarctica." Minerals 11, no. 8 (2021): 792. http://dx.doi.org/10.3390/min11080792.

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The Pirrit Hills are located in the Ellsworth–Whitmore Mountains of West Antarctica. The Pirrit Hills granite exhibits significant negative Eu anomalies (Eu/Eu* = 0.01~0.25) and a REE tetrad effect indicating intensive magmatic differentiation. Whole-rock Rb-Sr and Sm-Nd geochronologic analysis of the Pirrit Hills granite gave respective ages of 172.8 ± 2.4 Ma with initial 87Sr/86Sr = 0.7065 ± 0.0087 Ma and 169 ± 12 Ma with initial 144Nd/143Nd = 0.512207 ± 0.000017. The isotopic ratio data indicate that the Pirrit Hills granite formed by the remelting of Mesoproterozoic mantle-derived crustal

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Brooks, R. R. "Analytical chemists and dinosaurs." Canadian Journal of Chemistry 65, no. 5 (1987): 1033–41. http://dx.doi.org/10.1139/v87-175.

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The role of the analytical chemist in the development of the extraterrestrial impact theory for mass extinctions at the terminal Cretaceous Period is reviewed. High iridium concentrations in Cretaceous/Tertiary boundary clays have been linked to a terrestrial impact from an iridium-rich asteroid or large meteorite some 65 million years ago. Other evidence in favour of the occurrence of such an impact has been provided by the detection of shocked quartz grains originating from impact and of amorphous carbon particles similar to soot, derived presumably from wordwide wildfires at the terminal Cr

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ZHAO, JUN-HONG, RUIZHONG HU, MEI-FU ZHOU, and SHEN LIU. "Elemental and Sr–Nd–Pb isotopic geochemistry of Mesozoic mafic intrusions in southern Fujian Province, SE China: implications for lithospheric mantle evolution." Geological Magazine 144, no. 6 (2007): 937–52. http://dx.doi.org/10.1017/s0016756807003834.

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AbstractCretaceous mafic dykes in Fujian province, SE China provide an opportunity to examine the nature of their mantle source and the secular evolution of the Mesozoic lithospheric mantle beneath SE China. The mafic rocks have SiO2 ranging from 47.42 to 55.40 wt %, Al2O3 from 14.0 wt % to 20.4 wt %, CaO from 4.09 to 11.7 wt % and total alkaline (K2O+Na2O) from 2.15 wt % to 6.59 wt %. Two types are recognized based on their REE and primitive mantle-normalized trace element patterns. Type-A is the dominant Mesozoic mafic rock type in SE China and is characterized by enrichment of light rare ea

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Kamali, Amin, Mohsen Moayyed, Nasir Amel, et al. "Post-Mineralization, Cogenetic Magmatism at the Sungun Cu-Mo Porphyry Deposit (Northwest Iran): Protracted Melting and Extraction in an Arc System." Minerals 8, no. 12 (2018): 588. http://dx.doi.org/10.3390/min8120588.

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The Sungun porphyry ore deposit is located in Eastern Azarbaijan province, Northwestern Iran. The oldest intrusive pulse in the region is a quartz-monzonite pluton, which hosts the porphyry copper-molybdenum mineralization. The Sungun Copper Mine includes the mineralized Sungun porphyry as well as six groups of cross-cutting and lithologically distinct post-mineralization dykes. The composition of these dykes ranges from quartz diorite, gabbro, diorite, dacite, lamprophyre, and microdiorite. Quartz diorite and dacite dykes are the oldest and youngest dykes, respectively. Based on their cross-c

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Francis, P. W., R. S. J. Sparks, C. J. Hawkesworth, et al. "Petrology and geochemistry of volcanic rocks of the Cerro Galan caldera, northwest Argentina." Geological Magazine 126, no. 5 (1989): 515–47. http://dx.doi.org/10.1017/s0016756800022834.

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AbstractAt least 2000 km3 of relatively uniform dacitic magma have been erupted from the Cerro Galan caldera complex, northwest Argentina. Between 7 and 4 Ma ago several composite volcanoes predominantly of dacitic lava were constructed, and several large high-K dacitic ignimbrites were erupted. 2.2 Ma ago the > 1000km3 Cerro Galan ignimbrite was erupted. The predominant mineral assemblage in the ignimbrites is plagioclase-biotite-quartz-magnetite-ilmenite; the Cerro Galan ignimbrite also contains sanidine. Fe-Ti oxide minerals in the Cerro Galan ignimbrite imply temperatures of 801–816 °C.

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Kagami, Hiroo, Hisayoshi Yokose, and Hiroji Honma. "87Sr/86Sr and 143Nd/144Nd ratios of GSJ rock reference samples; JB-1a, JA-1 and JG-1a." GEOCHEMICAL JOURNAL 23, no. 4 (1989): 209–14. http://dx.doi.org/10.2343/geochemj.23.209.

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DE BORBA, ANDRÉ WEISSHEIMER, ANA MARIA PIMENTEL MIZUSAKI, DIOGO RODRIGUES ANDRADE DA SILVA, and KOJI KAWASHITA. "Razões Isotópicas 87Rb/86Sr, 87Sr/86Sr e 143Nd/144Nd como Traçadores de Proveniência de Rochas Sedimentares Siliciclásticas: Exemplos no Grupo Camaquã (Paleozóico inferior, RS, Brasil)." Pesquisas em Geociências 30, no. 2 (2003): 39. http://dx.doi.org/10.22456/1807-9806.19590.

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The Rb-Sr and Sm-Nd isotopic systems are ideal in constraining the provenance of fine-grained clastic rocks. This is particularly true for continental, fluvio-lacustrine, sedimentary units deposited under semi-arid climate conditions, where mechanical desintegration of source rocks dominates the weathering processes. Three sets of red-colored, continental siltstones of the Camaquã Group (Early Paleozoic, southern Brazil) were analyzed for these isotopic systems, providing important data for the understanding of the provenance pattern of the Santa Bárbara (lower) and Guaritas (upper) formations

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Gorokhov, I. M., T. S. Zaitseva, A. B. Kuznetsov, et al. "Isotope Systematics and the Age of Authigenic Minerals in Shales of the Inzer Formation, the Southern Urals." Стратиграфия 27, no. 2 (2019): 3–30. http://dx.doi.org/10.31857/s0869-592x2723-30.

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The 2–5, 0.6–2, 0.3–0.6, 0.2–0.3 and 0.1–0.2 µm clay subfractions (SFs) separated from two shale samples of the Upper Riphean Inzer Formation, the southern Urals, were studied by the TEM, XRD, and U–Pb, Sm–Nd, Rb–Sr and K–Ar isotopic methods. All the SFs consist of the low-temperature 1Md illite; admixtures of quartz, chlorite and 2M1 illite occur only in the coarsest SFs. The clay particles are isometric, regardless of their size. The CIS (Crystallinity Index Standard) illite values for the all SFs are typical for the dia(kata)genetic zone. As the size of particles in the SF decreases from 2–

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Prelević, D., S. F. Foley, V. Cvetković, and R. L. Romer. "The analcime problem and its impact on the geochemistry of ultrapotassic rocks from Serbia." Mineralogical Magazine 68, no. 4 (2004): 633–48. http://dx.doi.org/10.1180/0026461046840209.

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AbstractTertiary ultrapotassic volcanic rocks from Serbia occasionally display low levels of K2O and K2O/ Na2O. In these rocks, analcime regularly appears as pseudomorphs after pre-existing leucite microphenocrysts. The process ofleucite transformation in Serbian ultrapotassic rocks is very thorough: fresh leucite survives only in ugandites from the Koritnik lava flows as well as in rare inclusions in Cpx. This paper focuses on the impact of ‘analcimization’ on the mineralogy and geochemistry ofthe Serbian ultrapotassic rocks, using the samples where leucite survived as a monitor for the proce

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BRUNI, SANDRO, MASSIMO D'ORAZIO, MIGUEL J. HALLER, et al. "Time-evolution of magma sources in a continental back-arc setting: the Cenozoic basalts from Sierra de San Bernardo (Patagonia, Chubut, Argentina)." Geological Magazine 145, no. 5 (2008): 714–32. http://dx.doi.org/10.1017/s0016756808004949.

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AbstractEast of the Patagonian Andes, mafic volcanic rocks (mainly lava flows and scoriae) are exposed in the Sierra de San Bernardo fold belt and neighbouring areas (central Patagonia; 44.5–46° S, 69–71° W). They were erupted over a wide interval of time (late Eocene–Pleistocene; 14 new K–Ar ages), and show systematic chemical and Sr–Nd–Pb isotopic variations in time. The alkaline lavas (Mg number 57–66) erupted during the late Eocene and early Miocene, have an intraplate geochemical affinity, and have the highest 143Nd/144Nd and 206Pb/204Pb and the lowest 87Sr/86Sr ratios of the dataset. The

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Menzies, Martin A., Andrew Long, Gerry Ingram, Matthew Tatnell, and David Janecky. "MORB peridotite-sea water interaction: experimental constraints on the behaviour of trace elements, 87Sr/86Sr and 143Nd/144Nd ratios." Geological Society, London, Special Publications 76, no. 1 (1993): 309–22. http://dx.doi.org/10.1144/gsl.sp.1993.076.01.15.

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Castorina, F., F. Stoppa, A. Cundari, and M. Barbieri. "An enriched mantle source for Italy's melilitite-carbonatite association as inferred by its Nd-Sr isotope signature." Mineralogical Magazine 64, no. 4 (2000): 625–39. http://dx.doi.org/10.1180/002646100549652.

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AbstractNew Sr-Nd isotope data were obtained from Late Pleistocene carbonatite-kamafugite associations from the Umbria-Latium Ultra-Alkaline District of Italy (ULUD) with the aim of constraining their origin and possible mantle source(s). This is relevant to the origin and evolution of ultrapotassic (K/Na ≫2) and associated rocks generally, notably the occurrences from Ugandan kamafugites,Western Australian lamproites and South African orangeites. The selected ULUD samples yielded 87Sr/86Sr and 143Nd/144Nd ranging from 0.7100 to 0.7112 and from 0.5119 to 0.5121 respectively, similar to cratoni

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Morishita, Tomoaki, Masako Yoshikawa, Akihiro Tamura, Juan Guotana, and Biswajit Ghosh. "Petrology of Peridotites and Nd-Sr Isotopic Composition of Their Clinopyroxenes from the Middle Andaman Ophiolite, India." Minerals 8, no. 9 (2018): 410. http://dx.doi.org/10.3390/min8090410.

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The Andaman Ophiolite, India, is located at the southeastern end of the Tethyan ophiolites. We examine petrology and mineralogy of two lherzolites and a completely serpentinized dunite associated with lherzolite from the middle Andaman Island. Major and trace element compositions of minerals in the lherzolites suggest their residual origin after low-degree of partial melting with less flux infiltration, and are similar to those of abyssal peridotites recovered from mid-ocean ridges. The dunite with spinels having low-Cr/(Cr + Al) ratio was formed by interaction between peridotite and mid-ocean

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Dhar, Sunil, Robert Frei, Jan D. Kramers, Thomas F. Nagler, and Naresh Kochhar. "Sr, Pb and Nd Isotope Studies and their Bearing on the Petrogenesis of the Jalor and Siwana Complexes, Rajasthan, India." Journal Geological Society of India 48, no. 2 (1996): 151–60. http://dx.doi.org/10.17491/jgsi/1996/480204.

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Abstract The Jalor and Siwana complexes belong to the Malani igneous suite, Rajasthan, India and are characterised by within - plate, A - type granites associated with coeval felsic and mafic volcanism. Sr, Pb and Nd isotopic compostions of the two complexes have been determined. Sr isotopic studies reveal an isochron age of 725±7 Ma for the felsic rocks of the Jalor Complex, with an initial 87Sr/86Sr ratio of 0.7062±0.0020. Three highly differentiated granites from Siwana plot on the same near-isochron, indicating that the complexes are coeval. The Pb and Nd isotopic ratios range between (206

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Sun, Xing Li, Xiao Huang Liu, Jiu Feng Liu, and Bai Nian Sun. "The Age and Origin of the Jinfosi Biotite Granite, North Qilian, NW China: Evidence from U–Pb Zircon Age Data, Geochemistry, and Nd–Sr–Pb Isotopes." Advanced Materials Research 616-618 (December 2012): 3–18. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.3.

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New geochemistry, Nd–Sr–Pb isotopes and U–Pb zircon data from the Jinfosi Biotite granite provide important constraints on the evolution of the crust in this part of the North Qilian, NW China. The Jinfosi Biotite granite have the following properties: SiO2 > 65%, A/CNK(Molar Al2O3/(CaO + Na2O + K2O) ratios generally > 1.1, Na2O generally < 3.2%, Sm/Nd values between 0.17 and 0.27, and high Rb/Sr values. A chondrite-normalized rare earth element (REE) pattern shows negative Eu anomalies and depletion in heavy REEs. 143Nd/144Nd values are relatively low, and values of εNd(t) and εSr(t)

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Cousens, Brian L. "Isotopically depleted, alkalic lavas from Bowie Seamount, northeast Pacific Ocean." Canadian Journal of Earth Sciences 25, no. 10 (1988): 1708–16. http://dx.doi.org/10.1139/e88-161.

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Bowie Seamount, located 200 km west of the Queen Charlotte Islands, British Columbia, is one of the southernmost of the Pratt–Welker Seamounts in the Gulf of Alaska. Eight dredge hauls recovered hawaiite and mugearite, with major-and trace-element compositions similar to those of Hawaiian alkali basalts. All samples are enriched in light incompatible elements but are isotopically MORB-like: 87Sr/86Sr = 0.70269–0.70285; 143Nd/144Nd = 0.51307–0.51315; and 206Pb/204Pb = 18.26–19.18. Sr- and Pb-isotope ratios correlate positively, whereas Sr and Nd correlate negatively, and lie on a mixing trend b

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Leat, P. T., R. N. Thompson, M. A. Morrison, G. L. Hendry, and A. P. Dickin. "Silicic Magmas Derived by Fractional Crystallization from Miocene Minette, Elkhead Mountains, Colorado." Mineralogical Magazine 52, no. 368 (1988): 577–85. http://dx.doi.org/10.1180/minmag.1988.052.368.03.

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AbstractThe rock association of minette with silicic lavas and intrusions (granites, syenites, dacites) is a common geologic feature in both collisional and extensional tectonic settings. Considerable doubt exists as to whether a genetic link exists between these mafic and silicic rocks. We describe a Miocene sill from NW Colorado which is a clear example of a mixed magma consisting of originally-liquid inclusions of minette in a silicic trachydacite host. Chemical and Sr, Nd and Pb isotopic data are consistent with derivation of the silicic host magma of the sill dominantly by fractional crys

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Wang, Yin-Xi, Jie-Dong Yang, Jun Chen, Kai-Jun Zhang, and Wen-Bo Rao. "Variations of 143Nd/144Nd and 87Sr/86Sr ratios of the Lingtai profile in the Chinese Loess Plateau during the past 7Ma." Geochimica et Cosmochimica Acta 70, no. 18 (2006): A689. http://dx.doi.org/10.1016/j.gca.2006.06.1499.

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Négrel, Philippe, та Emmanuelle Petelet-Giraud. "Geochemistry, isotopic composition (δ18O, δ2H, 87Sr/86Sr, 143Nd/144Nd) in the groundwater of French Guiana as indicators of their origin, interrelations". Comptes Rendus Geoscience 342, № 10 (2010): 786–95. http://dx.doi.org/10.1016/j.crte.2010.07.003.

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Won, Eun-Ji, Seung Hee Kim, Young-Shin Go, et al. "A Multi-Elements Isotope Approach to Assess the Geographic Provenance of Manila Clams (Ruditapes philippinarum) via Recombining Appropriate Elements." Foods 10, no. 3 (2021): 646. http://dx.doi.org/10.3390/foods10030646.

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The increasing global consumption of seafood has led to increased trade among nations, accompanied by mislabeling and fraudulent practices that have rendered authentication crucial. The multi-isotope ratio analysis is considered as applicable tool for evaluating geographical authentications but requires information and experience to select target elements such as isotopes, through a distinction method based on differences in habitat and physiology due to origin. The present study examined recombination conditions of multi-elements that facilitated geographically distinct classifications of the

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Jo, Hui Je, Hyo Min Lee, Go-Eun Kim, Won Myung Choi, and Taehoon Kim. "Determination of Sr–Nd–Pb Isotopic Ratios of Rock Reference Materials Using Column Separation Techniques and TIMS." Separations 8, no. 11 (2021): 213. http://dx.doi.org/10.3390/separations8110213.

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Thermal ionization mass spectrometry (TIMS) can provide highly accurate strontium (Sr), neodymium (Nd), and lead (Pb) isotope measurements for geological and environmental samples. Traces of these isotopes are useful for understanding crustal reworking and growth. In this study, we conducted a sequential separation of Sr, Nd, and Pb and subsequently measured the 87Sr/86Sr, 143Nd/144Nd, 206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb ratios of 13 widely used rock certified reference materials (CRMs), namely BCR-2, BHVO-2, GSP-2, JG-1a, HISS-1, JLk-1, JSd-1, JSd-2, JSd-3, LKSD-1, MAG-1, SGR-1, and 435

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Kingson, Oinam, Rajneesh Bhutani, S. Balakrishnan, J. K. Dash, and Anil D. Shukla. "Subduction-related Manipur Ophiolite Complex, Indo-Myanmar Ranges: elemental and isotopic record of mantle metasomatism." Geological Society, London, Special Publications 481, no. 1 (2019): 195–210. http://dx.doi.org/10.1144/sp481.9.

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AbstractThis study reports, for the first time, Sr and Nd isotope ratios from the mafic rocks in the Manipur Ophiolite Complex (MOC), along with new elemental abundances to show the subduction zone influence. The initial 87Sr/86Sr ratios (for t = 127 Ma) range from 0.705230 to 0.709734. The initial 143Nd/144Nd and ɛNdt (t = 127 Ma) range from 0.512611 to 0.512900 and +2.7 to +8.3, respectively. The high field strength element (HFSE) ratios vary widely, with Nb/Ta ranging from c. 3 to 18 and Zr/Hf ranging from 20 to 41, indicating fluid–rock interaction in the presence of rutile. The correlated

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Pipera, K., A. Koroneos, T. Soldatos, G. Poli, and G. Christofides. "Origin of the High-K Tertiary magmatism in Northern Greece: Implications for mantle geochemistry and geotectonic setting." Bulletin of the Geological Society of Greece 47, no. 1 (2013): 416. http://dx.doi.org/10.12681/bgsg.11017.

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Tertiary plutonic and volcanic rocks cropping out in the Rhodope Massif (N. Greece) are studied using existing and new geochemical and isotopic data. Most of these rocks belong to the post-collisional magmatism formed as part of the prolonged extensional tectonics of the Rhodope region in Late Cretaceous– Paleogene time. This magmatism is considered to be of mantle origin; however, the character of the mantle source is controversial. Rock bulk chemistry and compositional variations show magmas with calc-alkaline to high-K calc-alkaline and shoshonitic features associated with magmatism at conv

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Leat, P. T., T. R. Riley, B. C. Storey, S. P. Kelley, and I. L. Millar. "Middle Jurassic ultramafic lamprophyre dyke within the Ferrar magmatic province, Pensacola Mountains, Antarctica." Mineralogical Magazine 64, no. 1 (2000): 95–111. http://dx.doi.org/10.1180/002646100549021.

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AbstractAn ultramafic lamprophyre dyke is described from the otherwise tholeiitic Ferrar magmatic province of Antarctica. We report an Ar-Ar age of 183 ± 2.2 Ma for the dyke, indistinguishable from those of the Ferrar tholeiites. However, the dyke has mineralogical and major and trace element compositions, and radiogenic isotopes ratios, very different from the Ferrar tholeiites. The sample consists of olivine and rare clinopyroxene phenocrysts with perovskite and spinel microphenocrysts in a groundmass of amphibole, nepheline and biotite. Carbonatitic globules contain calcite, dolomite, Fe-ri

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Clarke, D. Barrie, Michael A. MacDonald, and Saskia Erdmann. "Chemical variation in Al2O3CaONa2OK2O space: controls on the peraluminosity of the South Mountain Batholith." Canadian Journal of Earth Sciences 41, no. 7 (2004): 785–98. http://dx.doi.org/10.1139/e04-029.

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The South Mountain Batholith (SMB) of southwestern Nova Scotia is a large, highly differentiated, peraluminous, granitic batholith in which the average A/CNK (mol Al2O3/mol(CaO + Na2O + K2O)) increases from 1.16 to 1.23 with chemical evolution. We use vector analysis of variations solely in Al2O3(CaO + Na2O + K2O) space to assess the fractionation, assimilation, fluid, and source controls on the peraluminosity of the SMB. With increasing chemical evolution, Al2O3 decreases, CaO decreases sharply, Na2O is approximately constant, and K2O increases in the early and middle stages but decreases in

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DU, ZHIHENG, CUNDE XIAO, MINGHU DING, and CHUANJIN LI. "Identification of multiple natural and anthropogenic sources of dust in snow from Zhongshan Station to Dome A, East Antarctica." Journal of Glaciology 64, no. 248 (2018): 855–65. http://dx.doi.org/10.1017/jog.2018.72.

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ABSTRACTThe stable oxygen isotope composition, major ions and isotopic compositions of strontium (Sr), neodymium (Nd) and lead (Pb) in insoluble dust from recent surface snow samples along the transect from the Zhongshan and Progress stations (located on the Amery Ice Shelf, East Antarctica) to Dome A (Summit, Antarctica) were analysed. No previous isotopic fingerprinting studies have been conducted for this transect. These data were used to document the dust provenances in Antarctica along the transect up to the highest site, Dome A, for the first time. The insoluble dust in snow samples alon

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Zhou, Houyun, Bo-Shian Wang, Huazheng Guan, et al. "Constraints from strontium and neodymium isotopic ratios and trace elements on the sources of the sediments in Lake Huguang Maar." Quaternary Research 72, no. 2 (2009): 289–300. http://dx.doi.org/10.1016/j.yqres.2009.06.005.

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AbstractThe sediments in Lake Huguang Maar in coastal South China were previously thought to originate mainly from wind-blown dust transported from North China, such that the lake sediments recorded the varying strength of the Asian winter monsoon. An alternative explanation was that the local pyroclastic rocks supplied the lake sediments, but the actual contributions from the different sources remained unclear. Geochemical analyses including 87Sr/86Sr and 143Nd/144Nd and trace elements support the local pyroclastic rock as the dominant source: <22% of the total Sr in the lake sediments and

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Gao, Lihua, Zhigang Song, Chao Han, et al. "Petrogenesis, Magma Source, and Geodynamics of Paleogene Mafic Rocks, Huimin Sag, Jiyang Depression, Eastern China." Geofluids 2022 (June 8, 2022): 1–18. http://dx.doi.org/10.1155/2022/1571066.

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A suite of Paleogene mafic rocks was collected from boreholes in the Huimin Sag of the Jiyang Depression with the aim of investigating the petrogenesis and nature of mantle source for these rocks and further providing insights into the characteristic of related mantle plume. Whole-rock geochemical data indicate that the mafic rocks have relatively lower SiO2 (42.93%–48.57%) contents and similar characteristics to alkaline basalt and belong to transitional calc-alkaline series. These samples were clearly enriched in LREEs and depleted in HREEs and were also characterized by the enrichment of LI

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Clément, Jean-Philippe, Martial Caroff, Christophe Hémond, et al. "Pleistocene magmatism in a lithospheric transition area: petrogenesis of alkaline and peralkaline lavas from the BaringoBogoria Basin, central Kenya Rift." Canadian Journal of Earth Sciences 40, no. 9 (2003): 1239–57. http://dx.doi.org/10.1139/e03-046.

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New petrological, geochronological, and geochemical data on basalts, mugearites, peralkaline trachytes, and phonolites from the BaringoBogoria Basin, central Kenya Rift, are presented. KAr dating indicates that the volcanic rocks were emplaced between 894 ± 13 and 92 ± 5 ka. 87Sr/86Sr ranges from 0.70304 to 0.70692, 143Nd/144Nd from 0.51237 to 0.51295, 206Pb/204Pb from 18.4 to 19.8, 207Pb/204Pb from 15.46 to 15.70, and 208Pb/204Pb from 38.2 to 40.5. Despite a rather restricted sampling area and a relatively short time span ([Formula: see text]820 ka), the mineralogical and geochemical variat

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Shabanian, Nahid, Ali Reza Davoudian, Hossein Azizi, et al. "Petrogenesis of the Carboniferous Ghaleh-Dezh metagranite, Sanandaj–Sirjan zone, Iran: constraints from new zircon U–Pb and 40Ar/39Ar ages and Sr–Nd isotopes." Geological Magazine 157, no. 11 (2020): 1823–52. http://dx.doi.org/10.1017/s0016756820000096.

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AbstractThe Ghaleh-Dezh metagranites in the northern Sanandaj–Sirjan Zone (SaSZ) in western Iran are found in a 0.5 km long by 0.3 km wide unit emplaced within the older Precambrian basement. New zircon U–Pb ages confirm that crystallization and emplacement of the protolith of the metagranites occurred at 312 ± 10 Ma and 298 ± 17 Ma in the Upper Carboniferous (Pennsylvanian) – Early Permian, which is consistent with the ages of recently discovered Palaeozoic granites in the northern SaSZ. The studied metagranitic body has been metamorphosed at lower greenschist facies and deformed in ductile–b

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Delmonte, Barbara, Jean R. Petit, Isabelle Basile-Doelsch, Vladimir Lipenkov, and Valter Maggi. "First Characterization and Dating of East Antarctic Bedrock Inclusions from Subglacial Lake Vostok Accreted Ice." Environmental Chemistry 1, no. 2 (2004): 90. http://dx.doi.org/10.1071/en04029.

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Environmental Context.Lake Vostok is a large subglacial lake trapped below the East Antarctic ice sheet. The meteoric ice from deep Vostok ice cores has been used to document the climatic history of the Earth over hundreds of millennia, while the deeper part of the core preserves some basal rock fragments. These rock fragments represent unique geological samples of the inhospitable, ice-covered East Antarctic Plateau. Abstract.The Vostok (East Antarctica, 78°S, 106°E) ice core preserves, below the meteoric ice keeping the climatic memory of the last 420 000 years, ice formed by freezing of sub

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