Geochemistry and Origin of Sulphide Minerals in Mantle Xenoliths: Qilin, Southeastern China

Guo, Jingfeng; Griffin, William L.; O’Reilly, Suzanne Y.

doi:10.1093/petroj/40.7.1125

Cited by 95 publications

(65 citation statements)

References 39 publications

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“…6) and later from intermediate solid solution (ISS) of the Cu-Fe-S system (Fig. 5), and heazlewoodite (Ni 3 S 2 ) solid solution (HzSS) of the Ni-Fe-S system (e.g., Cabri 1973;Lorand and Conquéré 1983;Dromgoole and Pasteris 1987;Szabó and Bodnar 1995;Guo et al 1999;Fleet 2006;Lorand and Grégoire 2006). Bornite, if present, likely crystallizes from bornite solid solution (BoSS), which is shifted toward a higher Cu content (and higher metal/sulfur ratio) than chalcopyrite.…”

Section: Base-metal Sulfide Occurrence Major Element Geochemistry Anmentioning

confidence: 99%

“…Most primary BMS grains found in mantle peridotites have a diameter of 10-50 µm ( Figs. 2 and 3; e.g., Guo et al 1999), although in exceptional cases this may extend to 200 µm for sulfides enclosed in silicate grains (e.g., Beyer et al 2004) and up to 500 µm for sulfides in intergranular interstices (e.g., Gonzáles-Jiménez et al 2014). Sulfide commonly resides as a discrete inclusion within a silicate grain, but rarely within spinel (Ferraris (Harvey, unpublished data).…”

Section: Peridotite-hosted Sulfidesmentioning

confidence: 99%

“…Nickel, on the other hand, may be present at concentrations up to 46 wt% at 1000 ºC, increasing to a maximum of 60 wt % in MSS at ca. 900 ºC, which can be retained during cooling to 700 ºC (Fig, 6;Kullerud et al 1969;Guo et al 1999). …”

Section: Peridotite-hosted Sulfidesmentioning

confidence: 99%

“…Using rounded or polygonal BMS grains trapped within silicate phases, Aulbach et al (2004a) reconstructed the high-temperature composition of multi-phase BMS inclusions that exsolved from high-temperature solid solutions, despite the presence of exsolved flames of pentlandite in pyrrhotite and thin rims of chalcopyrite (cf. Guo et al 1999). Precursor MSS was identified by its microstructure and bulk composition, which plots in the MSS-field of Craig (1973) at 300 ºC and a cut-off of 5 wt% Ni was applied to distinguish MSS from pyrrhotite (the maximum solubility of Ni in the pyrrhotite at this temperature; Cabri 1973).…”

Section: Peridotite-hosted Sulfidesmentioning

confidence: 99%

“…Several groups of workers have attributed the formation of Al-augite pyroxenite-hosted BMS, and BMS hosted within clinopyroxene megacrysts and clinopyroxenites, to sulfur-saturation resulting from fractional crystallization of mafic magmas at mantle depths (e.g., Andersen et al 1987;Dromgoole and Pasteris 1987;Guo et al 1999). However, Re-Os isotope data for pyroxenite-hosted BMS are scarce and are restricted to a handful of studies Wang et al 2009;Ackerman et al 2013).…”

Section: Pyroxenite-hosted Sulfidesmentioning

confidence: 99%

See 4 more Smart Citations

Mantle Sulfides and their Role in Re–Os and Pb Isotope Geochronology

Harvey¹,

Warren²,

Shirey³

2016

Highly Siderophile and Strongly Chalcophile Elements in High-Temperature Geochemistry and Cosmochemistry

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Section: Base-metal Sulfide Occurrence Major Element Geochemistry Anmentioning

confidence: 99%

Section: Peridotite-hosted Sulfidesmentioning

confidence: 99%

Section: Peridotite-hosted Sulfidesmentioning

confidence: 99%

Section: Peridotite-hosted Sulfidesmentioning

confidence: 99%

Section: Pyroxenite-hosted Sulfidesmentioning

confidence: 99%

See 3 more Smart Citations

Mantle Sulfides and their Role in Re–Os and Pb Isotope Geochronology

Harvey¹,

Warren²,

Shirey³

2016

Highly Siderophile and Strongly Chalcophile Elements in High-Temperature Geochemistry and Cosmochemistry

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Chemical Sample Processing for Combined Selenium Isotope and Selenium‐Tellurium Elemental Investigation of the Earth's Igneous Reservoirs

Yierpan

König

Labidi

et al. 2018

Geochem Geophys Geosyst

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The redox‐sensitive, chalcophile, and volatile Se stable isotope system offers new perspectives to investigate the origin and evolution of terrestrial volatiles and the roles of magmatic and recycling processes in the development of the redox contrast between Earth's reservoirs. Selenium isotope systematics become more robust in a well‐constrained petrogenetic context as can be inferred from Se‐Te elemental signatures of sulfides and igneous rocks. In this study, we present a high‐yield chemical sample processing method that allows the determination of Se‐Te concentrations and Se isotope composition from the same sample digest of silicate rocks by hydride generation isotope dilution (ID) quadrupole inductively coupled plasma mass spectrometry (ICP‐MS) and double spike (DS) multicollector (MC)‐ICP‐MS, respectively. Our procedure yields ∼80% Se‐Te recoveries with quantitative separation of relevant interfering elements such as Ge and HG‐buffering metals. Replicate analyses of selected international reference materials yield uncertainties better than 0.11‰ (2 s.d.) on δ82/76Se and 3% (r.s.d.) on Se concentration for DS MC‐ICP‐MS determinations for as low as ∼10 ng sample Se. The precision of Se‐Te concentration measurements by ID ICP‐MS is better than 3% and 5% (r.s.d.) for total amounts of ∼0.5–1 ng Se and ∼0.2–0.5 ng Te, respectively. The basaltic reference materials have variable Se‐Te contents, but their δ82/76Se values are rather uniform (on average 0.23 ± 0.14‰; 2 s.d.) and different from the chondritic value. This altogether provides the methodology and potential to extend the limited data set of coupled Se isotope and Se‐Te elemental systematics of samples relevant to study the terrestrial igneous inventory.

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Non‐silicate inclusions in garnet from an ultra‐deep orogenic peridotite

et al. 2000

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Non-silicate solid inclusions in garnet from ultra-deep garnet peridotites, Otrùy, Western Gneiss Region, Norway, have been studied using light-optical, scanning and analytical electron microscopic techniques. Texturally, the investigated garnets reveal protogranular, porphyroclastic and equigranular microstructures. Protogranular and porphyroclastic garnets contain microstructural evidence of the former existence of`super-titanic' garnet. The microstructural evidence consists of exsolution textures involving rutile and ilmenite needles //`111b Grt as well as interstitial rutile grains. This exsolution microstructure is similar to the relict majoritic garnet microstructures found in the same peridotite. Some garnets contain both pyroxene and rutile exsolution.Other non-silicate mineral inclusions in protogranular and porphyroclastic garnet consist of nickel-iron alloys (Ni 99 Fe 01 ) and Cr-rich spinel. In addition, some protogranular, porphyroclastic and equigranular garnets contain composite Ni-Fe-Cu sulphide inclusions. The latter represent immiscible sulphide melt trapped within cracks that have healed.The original melting temperature of Ni-Fe-Cu sulphides was determined as being !1000 C and contrasts with temperatures derived from garnet±olivine±pyroxene mineral compositions using conventional geothermobarometry (c. 800 C/3 GPa). This contradiction is explained by the decoupling of microstructures and mineral chemistry; the microstructures were formed at higher temperatures than indicated by the current mineral chemistry. The decoupling of microstructures and current mineral chemistry has important applications for geodynamic models.

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Geochemistry and Origin of Sulphide Minerals in Mantle Xenoliths: Qilin, Southeastern China

Cited by 95 publications

References 39 publications

Mantle Sulfides and their Role in Re–Os and Pb Isotope Geochronology

Mantle Sulfides and their Role in Re–Os and Pb Isotope Geochronology

Chemical Sample Processing for Combined Selenium Isotope and Selenium‐Tellurium Elemental Investigation of the Earth's Igneous Reservoirs

Non‐silicate inclusions in garnet from an ultra‐deep orogenic peridotite

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