Analysis of geologic reference materials for REE and HFSE by inductively coupled plasma-mass spectrometry (ICP-MS)

Николаева, И. В.; Palesskii, S. V.; Kozmenko, O. A.; Аношин, Г. Н.

doi:10.1134/s0016702908100066

Cited by 107 publications

(33 citation statements)

References 24 publications

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“…The whole-rock abundances of trace elements, including the rare-earth elements (REE), were established at the same center by inductively coupled plasma-mass spectrometry (ICP-MS) using a high-resolution Finnigan MAT mass spectrometer (the model ELEMENT; Finnigan MAT, San Jose, CA, USA). The analytical procedures used were described in [18,19]. Contents of major oxides in the rocks were established at the same center by X-ray fluorescence (XRF) using procedures [20] based on the use of an ARL 9900XP spectrometer Thermo Fisher Scientific, Waltham, MA, USA) equipped with a Lifumat 2.0-Ox high-frequency induction furnace (Linn High Therm GmbH, Eschenfelden, Germany) and a HERZOG hydraulic HTP 40 pellet press (HERZOG Maschinenfabrik GmbH & Co. KG, Osnabrück, Germany).…”

Section: Methodsmentioning

confidence: 99%

Double-Front Crystallization in the Chapesvara Ultramafic Subvolcanic Complex, Serpentinite Belt, Kola Peninsula, Russia

et al. 2019

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Dunite–harzburgite–olivine-bearing orthopyroxenite successions in the subvolcanic Chapesvara-I and Chapesvara-II intrusions in the Serpentinite Belt, western Kola Peninsula, are notably magnesian. The mean Mg# value (whole-rock) is 86.6, and the olivine is Fo84−89. The upper contact facies (UCF) displays a lower Mg# (81.6). It consists of grains of Fo92 and abundant chromian spinel, implying rapid crystallization of an almost unfractionated melt. On average, the whole-rock Al2O3/TiO2 value is 22.45, close to 22.9 (UCF) and to the primitive mantle, ~22. The rise of primitive ultramafic magma presumably occurred in a special tectonic setting at the boundary of the Paleoproterozoic Lapland Granulite Terrane and the Belomorian Composite Terrane of Archean age. The Chapesvara suite resembles examples of the Al-undepleted komatiites in the Barberton Belt, South Africa, with magmas of up to 30–35% MgO. The UCF rock yields an anomalously low molar MgO/SiO2 value, close to that of dunitic rocks located at the center of the Chapesvara-II body. This rock is the most primitive, as indicated by the maximum Fo content of olivine, the lowest value of (Gd/Yb)N, 0.52, and the lowest abundances of middle to heavy rare-earth elements (REE) in the chondrite-normalized spectrum. The crystallization of the Chapesvara-II sill-like intrusion likely proceeded in two stages, which are evident from the olivine compositions varying from the maximum Fo92 (UCF) to Fo≤89.5 (the central dunite zone). At Stage 1, the UCF rock (Fo92) crystallized first, close to the upper contact. The area of crystallization then shifted to a central portion of the Chapesvara-II body, in which the dunitic zone (Fo89.5) formed in situ (Stage 2). The compositional variations in chromian spinel are consistent with this suggestion. Two crystallization trends were recognized. The type-1 trend displays a relative maximum or minimum close to the center, and then diverges into two linear subtrends directed upward and downward. This pattern is manifested in the variations of Mg# in olivine and chromian spinel, the whole-rock contents of Al and Ca, and in levels of incompatible elements: Ti, V, Zr, Y, and Hf. The type-2 trend decreases or increases uniformly from top to bottom. Variations in amount of Ni in olivine, the Fe3+# index in chromian spinel, and in values of Mg# (rocks), follow a type-2 trend. Variations in total amounts of REE, Nb, and Th, which gradually increase downward, are also related to a type-2 trend. Thus, a contrasting development and possible interference of the two types of evolutionary trends were observed in the crystallization history of the Chapesvara-II sill-like body. A double-front crystallization, hitherto unreported, involved two fronts moving upward and downward, respectively. The upward subtrend appeared to be of subordinate importance, whereas the extent of fractional crystallization of the downward front was much greater. Crystallization proceeded from the top to the bottom, presumably because of the preferential loss of heat at the roof. Variations in the Fe3+# index indicate that the level of fO2 also increased downward with progressive crystallization. Convection cells were presumably the key mechanism of accumulation of the crystallizing olivine grains to form the central dunite zone close to the center of the sill-like intrusion. The observed characteristics of the Chapesvara complex indicate the existence of a primitive-mantle source and imply a highly magnesian composition of intruding magma not only for Chapesvara, but also for the Pados-Tundra layered complex and associated suites of the Serpentinite Belt in the Kola Peninsula.

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Section: Methodsmentioning

confidence: 99%

Double-Front Crystallization in the Chapesvara Ultramafic Subvolcanic Complex, Serpentinite Belt, Kola Peninsula, Russia

et al. 2019

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“…Rare earth and trace elements in isolated calcite fractions were determined by solution ICP-MS on an Element Finnigan MAT ICP-MS, with the operating conditions and analytical procedures following Shatsky et al (2006) and Nikolaeva et al (2008), using the acid digested BHVO-2 for external calibration. The detection limits for Rb, Sr, Y, Zr, Nb, Cs, Ba, REE, Hf, Th, and U were in the range 0.01-0.2 μg/L.…”

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

Heavy carbon travertine related to methane generation: A case study of the Big Tarkhan cold spring, Kerch Peninsula, Crimea

Kokh

Shnyukov

Sokol

et al. 2015

Sedimentary Geology

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“…Nikolaeva and S.V Palesskii). The procedures of sample preparation and analysis are given in detail in [10]. Accessory zircons were extracted by S.N.…”

Section: Provalovomentioning

confidence: 99%

“…Except for three analytical points with high (over 10%) Table 1. Representative analysis of basalts(1-8) sequence along the Barabashevka River: (1-6) basalts from the lower unit, (7)(8) basalts from the upper unit; (9)(10)(11) (Fig. 6b).…”

Section: Age Of the Rocksmentioning

confidence: 99%

First evidence for the Middle Triassic volcanism in South Primorye

Golozubov

Крук

Kiselyov

et al. 2017

Russ. J. of Pac. Geol.

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Abstract⎯A detailed study of a relatively well-exposed fragment of the Barabash Formation in the southern part of the Voznesenka terrane is carried out to specify the geodynamic settings of the Permian volcanogenic and volcanogenic-sedimentary complexes in South Primorye. It is established that the basaltic flows juxtaposed in the studied sequence originated from sharply different sources. The geochemical characteristics indicate that the basalts from the sequence base were presumably derived by melting of oceanic lithospheric mantle or asthenosphere, while the source of the overlying basalts was lithospheric mantle reworked by a subduction process. The basalts are subsequently overlain by tuffaceous-terrigenous and terrigenous rocks and limestones with remains of Capitanian (Middle Permian) fauna. Accessory zircons extracted from the tuffaceous-terrigenous rocks yield an U-Pb concordant age of 233.3 ± 3.3 Ma (Middle Triassic Ladinian Stage) for the youngest zircon population. The obtained data lead us to conclude that the Barabash Formation is a tectonostratigraphic rather than stratigraphic unit and may be a fragment of the Triassic accretionary wedge. The obtained data cast doubt on the accepted assignment of this unit to the Voznesenka terrane. It is more logical to include it in the Laoelin-Grodekov terrane, which represents a fragment of the Late Paleozoic active continental margin. This suggests that the boundary between these blocks should be specified and the timing of the final stage of amalgamation of the Laoelin-Grodekov terrane with the terranes of the Bureya-Khanka orogenic belt should be revised.

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Analysis of geologic reference materials for REE and HFSE by inductively coupled plasma-mass spectrometry (ICP-MS)

Cited by 107 publications

References 24 publications

Double-Front Crystallization in the Chapesvara Ultramafic Subvolcanic Complex, Serpentinite Belt, Kola Peninsula, Russia

Double-Front Crystallization in the Chapesvara Ultramafic Subvolcanic Complex, Serpentinite Belt, Kola Peninsula, Russia

Heavy carbon travertine related to methane generation: A case study of the Big Tarkhan cold spring, Kerch Peninsula, Crimea

First evidence for the Middle Triassic volcanism in South Primorye

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