Origin of serpentinite-related nephrite from Jordanów and adjacent areas (SW Poland) and its comparison with selected nephrite occurrences.

Gil, Grzegorz; Barnes, Jaime D.; Boschi, Chiara; Gunia, Piotr; Szakmány, György; Bendő, Zsolt; Raczyński, Paweł; Péterdi, Bálint

doi:10.7306/gq.1228

Cited by 11 publications

(23 citation statements)

References 35 publications

(100 reference statements)

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“…The Yinggelike nephrite has Fe/(Fe + Mg) ratios of 0.02 to 0.05, thus falling within the D-type field. In addition, the Yinggelike nephrites have very low concentrations of Cr (0.81-34.68 ppm), Co (1.10-2.91 ppm), and Ni (0.52-20.15 ppm), which are consistent with a D-type origin (Cr = 1.9-179.0 ppm, Co = 0.5-9.8 ppm, Ni = 0.05-470.7 ppm), but inconsistent with an S-type one (Cr = 719-2812 ppm, Co = 42-260 ppm, Ni = 959-1898 ppm) [32]. The low compatible trace element (Cr, Co, Ni) contents for the Yinggelike nephrite are likely inherited from its protoliths, i.e., dolomitic marble instead of serpentinized ultramafic rocks.…”

Section: Dolomite-related Originmentioning

confidence: 72%

“…S-type nephrite commonly forms along the contact between serpentinite/peridotite and more silicic rocks [1]. Famous and representative S-type nephrite deposits have been found in British Columbia in Canada [27], East Sayan in Russia [25,26], New Zealand [28][29][30], Jordanów and the adjacent areas in SW Poland [32,33], Taiwan and Manasi in China [34,35]. D-type nephrite forms along the contact between dolomitic marble and igneous intrusions [1], and is reported in many localities in China [17][18][19][20][21][22], together with Chuncheon (Korea) [31], Cowell (South Australia) [1], Vitim (Siberia, Russia) [25,26], Złoty Stok (SW Poland) [33,36], and some new discoveries were made in Europe [1].…”

Section: Introductionmentioning

confidence: 99%

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Mineralogy and Geochemistry of Nephrite Jade from Yinggelike Deposit, Altyn Tagh (Xinjiang, NW China)

Jiang

Shi

et al. 2020

Minerals

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The historic Yinggelike nephrite jade deposit in the Altyn Tagh Mountains (Xinjiang, NW China) is renowned for its gem-quality nephrite with its characteristic light-yellow to greenish-yellow hue. Despite the extraordinary gemological quality and commercial significance of the Yinggelike nephrite, little work has been done on this nephrite deposit, due to its geographic remoteness and inaccessibility. This contribution presents the first systematic mineralogical and geochemical studies on the Yinggelike nephrite deposit. Electron probe microanalysis, X-ray fluorescence (XRF) spectrometry, inductively coupled plasma mass spectrometry (ICP-MS) and isotope ratio mass spectrometry were used to measure the mineralogy, bulk-rock chemistry and stable (O and H) isotopes characteristics of samples from Yinggelike. Field investigation shows that the Yinggelike nephrite orebody occurs in the dolomitic marble near the intruding granitoids. Petrographic studies and EMPA data indicate that the nephrite is mainly composed of fine-grained tremolite, with accessory pargasite, diopside, epidote, allanite, prehnite, andesine, titanite, zircon, and calcite. Geochemical studies show that all nephrite samples have low bulk-rock Fe/(Fe + Mg) values (0.02–0.05), as well as low Cr (0.81–34.68 ppm), Co (1.10–2.91 ppm), and Ni (0.52–20.15 ppm) contents. Chondrite-normalized REE patterns of most samples exhibit strong to moderate negative Eu anomalies (0.04–0.67), moderate LREE enrichments, nearly flat HREE patterns, and low ΣREE contents (2.16–11.25 ppm). The nephrite samples have δ18O and δD values of 5.3 to 7.4‰ and –74.9 to –86.7‰, respectively. The mineralogy, bulk-rock chemistry, and O–H isotope characteristics are consistent with the dolomite-related nephrite classification. Based on mineral paragenetic relationships, three possible mineral crystallization stages are recognized: (1) diopside formed by prograde metasomatism; (2) nephrite jade formed by retrograde metasomatism and replacement of Stage I anhydrous minerals; (3) hydrothermal alteration after the nephrite formation. Features of transition metal contents indicate that the color of the Yinggelike nephrite is likely to be controlled by the Fe2+, Fe3+, and Mn. Yellowish color is related to Mn and especially Fe3+, while greenish color is related to Fe2+. Our new mineralogical and geochemical results on the Yinggelike nephrite provide better constraints on the formation of other nephrite deposits in the Altyn Tagh Mountains, and can facilitate future nephrite prospecting and research in the region.

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Section: Dolomite-related Originmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Mineralogy and Geochemistry of Nephrite Jade from Yinggelike Deposit, Altyn Tagh (Xinjiang, NW China)

Jiang

Shi

et al. 2020

Minerals

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“…Sekerin [36] supposed that the origin of such fluid is a mantle. The granitic rocks are proposed as the most likely source of Si-rich fluids due to spatial relations, high Si content in granites, as well as isotopic studies in a lot of papers [30,33]. The impact of granite-derived fluids for serpentinite-type nephrite formation is also supported by Sr isotope studies [27].…”

Section: Discussionmentioning

confidence: 97%

“…Veins of nephrite are confined to the contact of these rocks with serpentinites. The metasomatic origin with an important role of faults is shown for the Manasi nephrite deposits in the Xinjiang Uygur Autonomous Region of China [32], Jordanów in Poland [33], and Agardak in Tuva at Russia [34]. At the same time, R. Coleman [35] associated nephrite formation with high-calcium solutions formed during the serpentinization of lherzolites.…”

Section: Discussionmentioning

confidence: 99%

Nephrite of Bazhenovskoye Chrysotile–Asbestos Deposit, Middle Urals: Localization, Mineral Composition and Color

et al. 2021

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In the Bazhenovskoye chrysotile–asbestos deposit (Middle Urals), nephrite bodies of the serpentinite type were found on the contact of after gabbro rodingites and serpentinites. The color is uniform to non-uniform, green to light green, bluish green, greyish green, and whitish. Spots, streaks, lenticules of bright bluish-green or, on the contrary, light green color are sometimes noted. The nephrite is mostly comprised of tremolite. Chromite decreases the quality of the ornamental stone, but it is replaced by chrome grossular, which gives the nephrite a brighter bluish-green color locally. Crushed grains of chromite contain increased concentrations of Zn and Mn. The quality of the nephrite is decreased by serpentine and talc, as well as by fractures due to drilling and blasting works. The specific feature of the nephrite in the Bazhenovskoye deposit is the formation of nickeline, maucherite, and uvarovite. The green color is associated with Fe2+ ions. The nephrite of the Bazhenovskoye deposit meets the requirements for an ornamental stone. The origin of this nephrite includes a combination of metasomatic and metamorphic processes.

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“…The results were compared with limited data available from previous studies on samples from the same localities. Previously published data consist primarily of potassium concentrations but also include thorium and uranium concentrations reported for para-nephrite and obtained by other analytical methods (Leaming, 1978;Łoboś et al, 2008;Grapes and Yun, 2010;Burtseva et al, 2015;Gil et al, 2015). Dolomite-related nephrite forms at the contact between dolomite marble and a granitic intrusion or siliceous metasediments (Nichol, 2000;Yui and Kwon, 2002;Gil et al, 2015).…”

Section: Exogenic Deposits Representing Secondarymentioning

confidence: 99%

Natural Radioactivity in Select Serpentinite-Related Nephrite Samples: A Comparison with Dolomite-Related Nephrite

Malczewski¹,

Sachanbiński²,

Dziurowicz³

2022

G&G

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Origin of serpentinite-related nephrite from Jordanów and adjacent areas (SW Poland) and its comparison with selected nephrite occurrences.

Cited by 11 publications

References 35 publications

Mineralogy and Geochemistry of Nephrite Jade from Yinggelike Deposit, Altyn Tagh (Xinjiang, NW China)

Mineralogy and Geochemistry of Nephrite Jade from Yinggelike Deposit, Altyn Tagh (Xinjiang, NW China)

Nephrite of Bazhenovskoye Chrysotile–Asbestos Deposit, Middle Urals: Localization, Mineral Composition and Color

Natural Radioactivity in Select Serpentinite-Related Nephrite Samples: A Comparison with Dolomite-Related Nephrite

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