Chemical and stable isotopic compositions of Proterozoic metamorphosed evaporites and associated tourmalines from the Houxianyu borate deposit, eastern Liaoning, China

Jiang, Shao‐Yong; Palmer, Martin R.; Peng, Qi-Ming; Yang, Jinghong

doi:10.1016/s0009-2541(96)00115-5

Cited by 82 publications

(45 citation statements)

References 33 publications

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“…A similar chemical trend is found in eastern Liaoning Province, China where a Paleoproterozoic metaborate deposit metamorphosed to upper amphibolite facies (700-750°C;~0.6 GPa) contains tourmaline that generally exhibits the O-P trend with Al as low as 3.01 apfu in accordance with the FeAl −1 exchange (Henry et al, 2008;Jiang et al, 1997;Palmer, 1995, 2002). These tourmaline compositions are somewhat different than the Namibian tourmalines in that they contain significantly greater amounts of Ca (0.11-0.62 apfu) and Mg (1.98-2.62 apfu).…”

Section: Higher-temperature Meta-evaporites Supporting Low Temperatursupporting

confidence: 70%

Tourmaline at diagenetic to low-grade metamorphic conditions: Its petrologic applicability

Henry

Dutrow

2012

Lithos

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Section: Higher-temperature Meta-evaporites Supporting Low Temperatursupporting

confidence: 70%

Tourmaline at diagenetic to low-grade metamorphic conditions: Its petrologic applicability

Henry

Dutrow

2012

Lithos

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“…To date, the boron isotopes have provided remarkable advancements in the studies of the formation process of nebulae and cosmic events, the processes of crust-mantle evolution and plate subduction effects, distinguishing the sedimentary environment, investigating ore genesis and tracking paleo-oceans and paleo-atmospheric conditions. Through a large number of studies on B isotopes by many domestic and foreign researchers, important advances have been achieved [3][4][5][6][7][8][9][10][11].…”

mentioning

confidence: 99%

“…This method is classified into positive thermal ionization mass spectrometry (P-TIMS) and negative thermal ionization mass spectrometry (N-TIMS), in which the determination precision of N-TIMS is 0.5‰-1.2‰ (2σ), while that of P-TIMS is up to 0.2‰-0.4‰ (2σ) [6,[12][13][14][15][16][17][18]. However, complex chemical separation and purification steps are required in this method.…”

mentioning

confidence: 99%

In situ boron isotope measurements of natural geological materials by LA-MC-ICP-MS

Hou

Xiao

et al. 2010

Chin. Sci. Bull.

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There are two main methods to determine boron isotopic composition. One is the solution method, in which boron is purified after the samples are dissolved in solution and the boron isotope ratios are determined by thermal ionization mass spectrometry (P-TIMS and N-TIMS) or multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS). The other is an in-situ analysis method, in which the in-situ boron isotopic ratios in minerals are analyzed directly using secondary ion mass spectrometry (SIMS) or laser ablation multicollector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS). In the in-situ analysis method for boron isotopes, the multifarious chemical purification and separation processes of the solution method are avoided, with increased work efficiency. In addition, the microzones and microbeddings of minerals can be analyzed in-situ to reveal the fine processes and conditions of mineral formation. In this study, using the standard-sample-bracketing (SSB) method, mass bias of the instrument and the fractionation of isotopes were calibrated, and the in-situ determination method of LA-MC-ICP-MS for boron isotopes was established. Through detailed analyses on a series of boron isotope standards and samples, a matrix effect was assessed but not detected, and the analysis results were in accordance with the formerly reported values or P-TIMS determined values, within the error range. The analytical results for IAEA B4 and IMR RB1 with relatively high boron contents were δ 11 B = -(8.36±0.58)‰ (2σ, n=50) and δ 11 B = -(12.96±0.97)‰ (2σ, n=57), respectively; the analytical result for IAEA B6 with relatively low boron content was δ 11 B = -(3.29±1.12)‰ (2σ, n=35). In-situ measurements for B isotopes were performed on geological samples such as tourmaline, ulexite, ludwigite, inyoite and ascharite, with the results consistent with those determined by P-TIMS, within the error range. boron isotope, in situ analysis, LA-MC-ICP-MS, matrix effect, geochemistry Citation: Hou K J, Li Y H, Xiao Y K, et al. In situ boron isotope measurements of natural geological materials by LA-MC-ICP-MS.

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“…The analysed tourmalines from the Asarcık region are characterized by negative Eu and positive Ce anomalies, and such anomalies may reflect the redox reactions during the formation of tourmalines from hydrothermal fluids. The significant enrichment of heavy REE in tourmaline is in contrast to the REE patterns of the whole-rock granitoid (see Figure 6) and indicates a mobilization of heavy REE during hydrothermal processes (Jiang et al 1997(Jiang et al , 1999b(Jiang et al , 2004.…”

Section: Trace and Rees In Tourmaline As A Sensitive Indicator For Hymentioning

confidence: 84%

“…Concentration level of the Pb and Zn in tourmalines from the fresh and less-altered Asarcık granitoid and the quartz veins on log Pb versus Zn plot shows a general increase with increasing Zn content (Figure 10(a)). The Pb contents of tourmalines are, in general, higher than those of tourmalines from different geological environments including massive sulphide deposits (Taylor and Slack 1984;Griffin et al 1996), gold deposit (Jiang et al 2002), metamorphosed evaporates and associated tourmalines (Jiang et al 1997), porphyry Cu -Mo deposit (Yavuz et al 1999a), tin deposit (Jiang et al 2004), tourmaline-rich rocks (Pesquera et al 2005), and pegmatites (Roda-Robles et al 2004). Plots of log Pb versus Cu show no distinctive variation (Figure 10(b)), but contents of Pb and Cu in tourmalines from the fresh and less-altered Asarcık granitoid and tourmalines in the quartz veins display a positive correlation (r ¼ 0.92 and 0.83, respectively).…”

Section: Trace and Rees In Tourmaline As A Sensitive Indicator For Hymentioning

confidence: 99%

Trace-element, rare-earth element and boron isotopic compositions of tourmaline from a vein-type Pb–Zn–Cu ± U deposit, NE Turkey

Yavuz

Jiang

Karakaya

et al. 2009

International Geology Review

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This paper reports trace-element, rare-earth element (REE) and boron isotopic compositions of tourmaline in the Asarcık granitoid and quartz veins at Şebinkarahisar. Abundant tourmaline occurs in the vein-type Pb-Zn-Cu^U deposit, within the northeastern Pontide Metallogenic Belt, both within the Late Cretaceous Asarcık granitoid and in associated quartz-tourmaline veins. Tourmaline in the granitoid forms as rosettes up to 1.5 cm in diameter, whereas in quartz-tourmaline veins a few centimetres to a few metres wide, it occurs as black needles and masses that cut the pluton. We present a systematic geochemical study of these tourmalines -all of the schorl-dravite series. Tourmalines from the quartz veins contain high concentrations of ore metals such as Ag, Bi and Zn and have higher Sr, Cr and Sn contents than tourmalines in the Asarcık granitoid. Tourmalines from intensively altered parts of the pluton are characterized by higher concentrations of trace elements such as Ba, Rb, V, Sc, Th and Zr compared with occurrences in the quartz veins and in the fresh and less-altered granitoid. Chondritenormalized patterns of REEs in tourmalines from the Asarcık granitoid are generally similar to those of tourmalines in the quartz veins. All vein tourmalines, however, are characterized by heavy REE enrichments, in sharp contrast to those in the granitoid. Boron isotopic compositions of tourmalines range from 214.0 to 22.2‰ and fall within the d 11 B range of this mineral in granite-related settings. Tourmaline rosettes from the Asarcık granitoid show relatively lighter d 11 B values (214.0 to 212.2‰) in comparison with those in the quartz veins (210.4 to 22.2‰).

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Chemical and stable isotopic compositions of Proterozoic metamorphosed evaporites and associated tourmalines from the Houxianyu borate deposit, eastern Liaoning, China

Cited by 82 publications

References 33 publications

Tourmaline at diagenetic to low-grade metamorphic conditions: Its petrologic applicability

Tourmaline at diagenetic to low-grade metamorphic conditions: Its petrologic applicability

In situ boron isotope measurements of natural geological materials by LA-MC-ICP-MS

Trace-element, rare-earth element and boron isotopic compositions of tourmaline from a vein-type Pb–Zn–Cu ± U deposit, NE Turkey

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