Matches in SemOpenAlex for { <https://semopenalex.org/work/W2889071520> ?p ?o ?g. }
- W2889071520 endingPage "105" @default.
- W2889071520 startingPage "59" @default.
- W2889071520 abstract "Abstract Several small pyrite ± baryte ± iron-oxide orebodies (Buca della Vena, Canale della Radice, Fornovolasco, Monte Arsiccio and Pollone) are hosted in the metamorphic rocks of the southern Apuan Alps, northern Tuscany, Italy. These deposits are exceptionally thallium-rich, expressed in part by assemblages comprising rare Tl-sulfosalts. Using a variety of techniques including laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) on fifty-four samples, the textural and trace element evolution of pyrite during greenschist facies metamorphism has been described. Five generations of pyrite have been recognised. Pyrite-1 (py1) and pyrite-2 (py2) (framboidal and colloform pyrite, respectively) likely represent pristine generations and are rich in trace elements. Pyrite-3 (py3) forms fine-grained disseminations often aligned with the metamorphic fabric and likely formed during the earliest stages of deformation associated with metamorphism. Pyrite-4 (py4) forms coarse, euhedral, inclusion-rich crystal clusters and likely formed as pristine pyrite generations began to recrystallize. Pyrite-5 (py5) is typically coarse, relatively ‘clean’ and often euhedral. It is interpreted to be the end-product of pyrite recrystallization, with grain size increasing and micro-inclusions being expelled late on the prograde path, then granoblastic annealed textures forming during retrograde cooling. Pyrite (especially primary pyrites; py1 and py2) is particularly rich in As (up to 17,400 ppm), Sb (up to 5100 ppm) and Tl (up to 4200 ppm), while Ni, Pb and Mn may be present above 1000 ppm, and Hg, Co, Cu, Zn, Mo, Bi and Ag may all be present above 100 ppm. Some trace elements, particularly As, Ni and Co, are commonly zoned in late metamorphic pyrite overgrowths. The incorporation of some trace elements into pyrite seems to have been facilitated by the presence of Sb in a similar way that As generally facilitates Au incorporation. Concentrations of most trace elements decrease from py3 to py4 at Fornovolasco and Monte Arsiccio, while in the other deposits the opposite trend is observed. Concentrations of most trace elements drop significantly from py4 to py5, where recrystallization of pyrite liberates a large proportion of As, Sb, Tl, Pb, Hg, Cu, Zn, Ag and Mn, likely during retrograde cooling and annealing. The release of these elements from pyrite during metamorphic recrystallization has directly facilitated the formation of late-stage sulfosalts, especially at Monte Arsiccio, where textural evidence suggests sulfosalt assemblages intimately associated with py5 were mobilised as melts during greenschist facies metamorphism. At Monte Arsiccio, around 75% of Tl hosted in early recrystallized pyrite is released upon complete recrystallization. As such, mass balance calculations show that all Tl contained in Tl-sulfosalts could be supplied from locally recrystallizing pyrite, and that in total, more than 250 tons of Tl could potentially have been liberated from the pyrite orebody at Monte Arsiccio during metamorphism. This study highlights the significant quantities of Tl and other metals that may be hosted in pyrite, and also the potential role that metamorphic recrystallization may play in mobilising and (re)-concentrating (or indeed dispersing) metals in a pyrite-dominant ore system." @default.
- W2889071520 created "2018-09-07" @default.
- W2889071520 creator A5007136310 @default.
- W2889071520 creator A5047612204 @default.
- W2889071520 creator A5067547550 @default.
- W2889071520 creator A5070896938 @default.
- W2889071520 date "2018-11-01" @default.
- W2889071520 modified "2023-10-17" @default.
- W2889071520 title "Textural and trace element evolution of pyrite during greenschist facies metamorphic recrystallization in the southern Apuan Alps (Tuscany, Italy): Influence on the formation of Tl-rich sulfosalt melt" @default.
- W2889071520 cites W1545553708 @default.
- W2889071520 cites W1632482737 @default.
- W2889071520 cites W1643945302 @default.
- W2889071520 cites W1868127008 @default.
- W2889071520 cites W1938264244 @default.
- W2889071520 cites W195142159 @default.
- W2889071520 cites W1965744338 @default.
- W2889071520 cites W1968558694 @default.
- W2889071520 cites W1969023317 @default.
- W2889071520 cites W1969725957 @default.
- W2889071520 cites W1970312307 @default.
- W2889071520 cites W1970688872 @default.
- W2889071520 cites W1974988427 @default.
- W2889071520 cites W1976819346 @default.
- W2889071520 cites W1981061035 @default.
- W2889071520 cites W1982002946 @default.
- W2889071520 cites W1984521255 @default.
- W2889071520 cites W1986150593 @default.
- W2889071520 cites W1987380615 @default.
- W2889071520 cites W1990061646 @default.
- W2889071520 cites W1992156607 @default.
- W2889071520 cites W1994904390 @default.
- W2889071520 cites W2003594492 @default.
- W2889071520 cites W2009254162 @default.
- W2889071520 cites W2009883931 @default.
- W2889071520 cites W2010221386 @default.
- W2889071520 cites W2012322530 @default.
- W2889071520 cites W2017897919 @default.
- W2889071520 cites W2018093298 @default.
- W2889071520 cites W2019618011 @default.
- W2889071520 cites W2022561119 @default.
- W2889071520 cites W2024850495 @default.
- W2889071520 cites W2028784400 @default.
- W2889071520 cites W2032054991 @default.
- W2889071520 cites W2033865324 @default.
- W2889071520 cites W2036899622 @default.
- W2889071520 cites W2037828713 @default.
- W2889071520 cites W2042173627 @default.
- W2889071520 cites W2043570922 @default.
- W2889071520 cites W2044342397 @default.
- W2889071520 cites W2046096314 @default.
- W2889071520 cites W2051323905 @default.
- W2889071520 cites W2051705384 @default.
- W2889071520 cites W2057559725 @default.
- W2889071520 cites W2061785747 @default.
- W2889071520 cites W2063039002 @default.
- W2889071520 cites W2064275717 @default.
- W2889071520 cites W2067194509 @default.
- W2889071520 cites W2077370448 @default.
- W2889071520 cites W2079127500 @default.
- W2889071520 cites W2084875901 @default.
- W2889071520 cites W2085961541 @default.
- W2889071520 cites W2088096040 @default.
- W2889071520 cites W2089507620 @default.
- W2889071520 cites W2092156812 @default.
- W2889071520 cites W2095040244 @default.
- W2889071520 cites W2098005221 @default.
- W2889071520 cites W2098177842 @default.
- W2889071520 cites W2106069556 @default.
- W2889071520 cites W2113957837 @default.
- W2889071520 cites W2130626244 @default.
- W2889071520 cites W2138167154 @default.
- W2889071520 cites W2143035384 @default.
- W2889071520 cites W2144106528 @default.
- W2889071520 cites W2147313367 @default.
- W2889071520 cites W2152201494 @default.
- W2889071520 cites W2154295153 @default.
- W2889071520 cites W2165399803 @default.
- W2889071520 cites W2167083043 @default.
- W2889071520 cites W2172273661 @default.
- W2889071520 cites W2273854651 @default.
- W2889071520 cites W2278700438 @default.
- W2889071520 cites W2287708747 @default.
- W2889071520 cites W2314503413 @default.
- W2889071520 cites W2325234325 @default.
- W2889071520 cites W2328037678 @default.
- W2889071520 cites W2329979335 @default.
- W2889071520 cites W2340517067 @default.
- W2889071520 cites W2397887928 @default.
- W2889071520 cites W2404862271 @default.
- W2889071520 cites W2413699796 @default.
- W2889071520 cites W2513019172 @default.
- W2889071520 cites W2514781466 @default.
- W2889071520 cites W2514902134 @default.
- W2889071520 cites W2536680102 @default.
- W2889071520 cites W2555860140 @default.
- W2889071520 cites W2580608397 @default.
- W2889071520 cites W2602567820 @default.
- W2889071520 cites W2743224746 @default.