2013
DOI: 10.1111/jmg.12063
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The initial garnet‐in reaction involving siderite–rhodochrosite, garnet re‐equilibration and PTt paths of graphitic schists in the Black Hills orogen, South Dakota, USA

Abstract: It is generally thought that garnet in metapelites is produced by continuous reactions involving chlorite or chloritoid. Recent publications have suggested that the equilibrium temperatures of garnet-in reactions may be significantly overstepped in regionally metamorphosed terranes. The growth of small spessartine-almandine garnet crystals on Mn-siderite at the garnet isograd in graphitic metapelites in the Proterozoic Black Hills orogen, South Dakota, demonstrates that Mn-siderite was the principal reactant t… Show more

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Cited by 10 publications
(4 citation statements)
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“…Gorce et al, 2021; Nagurney et al, 2021; Pattison & Tinkham, 2009; Waters & Lovegrove, 2002; Wolfe & Spear, 2018), although some studies document minor (<10°C, e.g. George & Gaidies, 2017; Moynihan & Pattison, 2013; Nabelek & Chen, 2014) or larger discrepancies (>100°C; e.g. Hoschek, 2013).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Gorce et al, 2021; Nagurney et al, 2021; Pattison & Tinkham, 2009; Waters & Lovegrove, 2002; Wolfe & Spear, 2018), although some studies document minor (<10°C, e.g. George & Gaidies, 2017; Moynihan & Pattison, 2013; Nabelek & Chen, 2014) or larger discrepancies (>100°C; e.g. Hoschek, 2013).…”
Section: Discussionmentioning
confidence: 99%
“…For example, the thermal overstep is minor when Mn siderite is a reactant due to the discontinuous decarbonation/dehydration reaction with large entropy change (e.g. Nabelek & Chen, 2014).…”
Section: Discussionmentioning
confidence: 99%
“…HPG liquidus temperature from stable isotope oxygen equilibria in magmatic phases is estimated at ∼ 800 • C (Nabelek et al, 1992b). Intrusion probably occurred during uplift (Nabelek and Chen, 2014) and continued until final emplacement pressure around 3.5 -4 kbar. Post-intrusion cooling is constrained by muscovite Rb/Sr ages in the granite (Riley, 1970;Ratté, 1986;Krogstad and Walker, 1994), and 40 Ar/ 39 Ar ages on hornblende, biotite and muscovite mostly across the regional contact aureole (Berry et al, 1994;Dahl et al, 1999;Holm et al, 1997;Dahl and Foland, 2008).…”
Section: Geological Settingmentioning
confidence: 99%
“…Zen (1981) also proposed an elegant treatment of phase relations in slightly calcic pelitic rocks, but did not consider Na 2 O and CO 2 components. More recently, Nabelek and Chen (2014) investigated the role of carbonates (siderite–rhodochrosite solid solution) in the nucleation and growth of garnet in graphitic schists, providing convincing evidence of the importance of considering CO 2 when studying metamorphism of metapelites, even if carbonates are no more present in the studied rocks.…”
Section: Introductionmentioning
confidence: 99%