Mineral Replacement Reactions

Putnis, Andrew

doi:10.2138/rmg.2009.70.3

Cited by 847 publications

(610 citation statements)

References 139 publications

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“…It is considered that leached layers might form through: (i) incongruent dissolution and exchange of cations in the outermost zone of a mineral with hydrogen from solution, leading to preferential removal of cations showing weaker bonding with oxygen [Weissbart and Rimstidt, 2000;Schott et al, 2012]; and/or (ii) interface coupled dissolution/precipitation, with bond-breaking, elemental release and re-precipitation at the advancing fluid-mineral interface [Hellmann et al, 2003;Putnis, 2009;Ruiz-Agudo et al, 2012]. Although, the siliceous layers observed in this study are not sensu stricto leached layers, i.e.…”

Section: Liz3 2h1mentioning

confidence: 99%

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

et al. 2016

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Serpentine minerals serve as a Mg donor in carbon capture and storage by mineralisation (CCSM).The acid-treatment of nine comprehensively-examined serpentine polymorphs and polytypes, and the subsequent microanalysis of their post-test residues highlighted several aspects of great importance to the choice of the optimal feed material for CCSM. Compelling evidence for the nonuniformity of serpentine mineral performance was revealed, and the following order of increasing Mg extraction efficiency after three hours of acid-leaching was established: Al-bearing polygonal serpentine (<5%) ≤ Al-bearing lizardite 1T (≈5%) < antigorite (24-29%) < well-ordered lizardite 2H 1 (≈65%) ≤ Al-poor lizardite 1T (≈68%) < chrysotile (≈70%) < poorly-ordered lizardite 2H 1 (≈80%) < nanotubular chrysotile (≈85%).It was recognised that the Mg extraction efficiency of the minerals depended greatly on the intrinsic properties of crystal structure, chemistry and rock microtexture. On this basis, antigorite and Albearing well-ordered lizardite were rejected as potential feedstock material whereas any chrysotile, non-aluminous, widely spaced lizardite and/or disordered serpentine were recommended.The formation of peripheral siliceous layers, tens of microns thick, was not universal and depended greatly upon the intrinsic microtexture of the leached particles. This study provides the first comprehensive investigation of nine, carefully-selected serpentine minerals, covering most varieties and polytypes, under the same experimental conditions. We focused on material characterisation and the identification of the intrinsic properties of the minerals that affect particle's reactivity. It can therefore serve as a generic basis for any acid-based CCSM pre-treatment.

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Section: Liz3 2h1mentioning

confidence: 99%

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

et al. 2016

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“…It has nevertheless been suggested that fluids can become supersaturated locally if they are isolated from the bulk fluid leading to mineral replacement reactions (e.g. Putnis 2009;Ruiz-Agudo et al, 2012;Bray et al, 2014Bray et al, , 2015.…”

Section: The Long-term Dissolution Behavior Of Forsterite At Earth Sumentioning

confidence: 99%

“…Giammar et al, 2005;Zakaznova-Herzog et al 2008;Olssen et al, 2012;Wang and Giammar, 2012;Hövelmann et al, 2013;Saldi et al, 2013). The degree to which secondary surface precipitates affect the dissolution rates of the primary mineral appears to depend on the structural match between the two minerals and the presence of interconnected porous pathways in the secondary phases (Hodson, 2003;Cubillas et al, 2005;Putnis, 2009;Stockmann, 2011Stockmann, , 2013Saldi et al, 2013). Finally, long-term olivine dissolution rates can also be limited by the slow precipitation rates of secondary minerals, which could lead the fluid to approach equilibrium with the dissolving mineral (e.g.…”

Section: Introductionmentioning

confidence: 99%

The efficient long-term inhibition of forsterite dissolution by common soil bacteria and fungi at Earth surface conditions

Oelkers

Benning

Lutz

et al. 2015

Geochimica et Cosmochimica Acta

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“…The presence of et al 2012). The formation of Prv-1 in serpentinized Opx1 (Prv-1 contains inclusions of Srp-Ctl) most likely occurred by grain scale fluid-aided coupled dissolution-reprecipitation mechanism (Putnis 2009;Li et al 2014). Activities of Ca were likely high, and of Si fairly low, to replace inferred Ca-pyroxene-member and/or Cpx lamellae in Opx1 by Prv-1 at presence of (Ti,Fe)Spl.…”

Section: Resultsmentioning

confidence: 99%

“…Perovskite-2 also occurs in rodingite veins alone, ingrown by Chl and Ap, and surrounded by a typical rodingite mineral assemblage of Di, Ves, Adr, Ep/Czo, Ap and Chl. Perovskite (1 and 2) is replaced by Pph along the grain rims and interiors most likely by fluid-aided coupled dissolutionreprecipitation (Putnis 2009) at increased Fe-Mn element solubility in rodingitization fluids pervading serpentinized harzburgite. Perovskite (mainly Prv-2) is partly to almost totally replaced by (Ti-)Adr (Fig.…”

Section: Occurrence Of Perovskitementioning

confidence: 99%

Perovskite, reaction product of a harzburgite with Jurassic– Cretaceous accretionary wedge fluids (Western Carpathians, Slovakia): evidence from the whole-rock and mineral trace element data

Putiš¹,

Yang²,

Vaculovič³

et al. 2016

Geologica Carpathica

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Perovskite (Prv) was discovered in an abyssal harzburgite from a "mélange" type blueschist-bearing accretionary wedge of the Western Carpathians (Meliata Unit, Slovakia). Perovskite-1 formation in serpentinized orthopyroxene may be simplified by the mass-balance reaction: Ca 2 Si 2 O 6 (Ca-pyroxene-member)+2Fe 2 TiO 4 (ulvöspinel molecule in spinel)+2H 2 O+O 2 =2CaTiO 3 (Prv)+2SiO 2 +4FeOOH (goethite). Perovskite-2 occurs in a chlorite-rich blackwall zone separating serpentinite and rodingite veins, and in rodingite veins alone. The bulk-rock trace-element patterns suggest negligible differences from visually and microscopically less ("core") to strongly serpentinized harzburgite due to serpentinization and rodingitization: an enrichment in LREE(La,Ce), Cs, ±Ba, U, Nb, Pb, As, Sb, ±Nd and Li in comparison with HREE, Rb and Sr. The U/Pb perovskite ages at ~135 Ma are interpreted to record the interaction of metamorphic fluids with harzburgite blocks in the Neotethyan Meliatic accretionary wedge. Our LA-ICP-MS mineral study provides a complex view on trace element behaviour during the two stages of rodingitization connected with Prv genesis. The positive anomalies of Cs, U, Ta, Pb, As, Sb, Pr and Nd in Cpx, Opx and Ol are combined with the negative anomalies of Rb, Ba, Th, Nb and Sr in these minerals. The similar positive anomalies of Cs, U, Ta, ±Be, As, Sb found in typical serpentinization and rodingitization minerals, with variable contents of La, Ce and Nd, and negative anomalies of Rb, Ba, Th, Nb and Sr suggest involvement of crustal fluids during MP-LP/LT accretionary wedge metamorphism. LA-ICP-MS study revealed strong depletion in LREE from Prv-1 to Prv-2, and a typically negative Eu (and Ti) anomaly for Prv-1, while a positive Eu (and Ti) anomaly for Prv-2. Our multi-element diagram depicts enrichment in U, Nb, La, Ce, As, Sb, Pr, Nd and decreased Rb, Ba, Th, Ta, Pb, Sr, Zr in both Prv generations. In general, both Prv generations are very close to the end-member composition. In spite of low concentrations of isomorphic constituents, Prv-1 and Prv-2 display the A (La,Ce) 3+ + B (Fe,Cr) 3+ = A Ca 2+ + B Ti 4+ heterovalent couple substitution. A decrease of ferric iron in Prv-2 indicates increasing reduction conditions during rodingitization.

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Mineral Replacement Reactions

Cited by 847 publications

References 139 publications

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

The efficient long-term inhibition of forsterite dissolution by common soil bacteria and fungi at Earth surface conditions

Perovskite, reaction product of a harzburgite with Jurassic– Cretaceous accretionary wedge fluids (Western Carpathians, Slovakia): evidence from the whole-rock and mineral trace element data

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