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- W3194682018 abstract "Pyrite is the most abundant metal sulfide in the Earth’s crust and is also found on Mars. It can form by direct hydrothermal precipitation or by polymorphic phase transformation from marcasite. However, the control on the dynamics of hydrothermal pyrite precipitation is poorly understood, and the kinetics of the hydrothermal transformation from marcasite to pyrite is unknown. To address these issues, we quantified pyrite and marcasite formation in hydrothermal fluids at pH 1, using pyrrhotite as a precursor mineral to produce supersaturated solutions. In situ powder X-ray diffraction experiments at 190 °C showed that hydrothermal fluids rich in ΣS(-II) (0.2 molal) favored the precipitation of nanocrystal pyrite (∼20 nm) due to a high saturation index (>105), while ΣS(-II)-free fluids produced a mixture of marcasite and pyrite nanocrystals (21–46 nm) due to a low saturation index (<104). The fluid/rock ratio (70 and 120 g/g at 210 °C) can also affect the saturation indices of these fluids, influencing nucleation and crystal growth dynamics of pyrite and marcasite and resulting in complex evolution of crystallite size, phase abundance, and the pyrite/marcasite ratio. Ex situ hydrothermal experiments at 210 °C showed rapid transformation from marcasite to pyrite, with around 95% marcasite being transformed to pyrite in 20 weeks, compared to more than 6.3 million years at 210 °C under dry conditions based on extrapolation from previous kinetic studies. These results suggest that saturation index influences hydrothermal precipitation dynamics and controls phase selection between pyrite and marcasite and that marcasite may not survive over geological time in low-temperature (<200 °C), water-saturated environments." @default.
- W3194682018 created "2021-08-30" @default.
- W3194682018 creator A5015011727 @default.
- W3194682018 creator A5019739977 @default.
- W3194682018 creator A5040498505 @default.
- W3194682018 creator A5049013373 @default.
- W3194682018 creator A5089202257 @default.
- W3194682018 date "2021-08-12" @default.
- W3194682018 modified "2023-10-18" @default.
- W3194682018 title "Rapid Marcasite to Pyrite Transformation in Acidic Low-Temperature Hydrothermal Fluids and Saturation Index Control on FeS2 Precipitation Dynamics and Phase Selection" @default.
- W3194682018 cites W1500381575 @default.
- W3194682018 cites W1750695944 @default.
- W3194682018 cites W181798372 @default.
- W3194682018 cites W1963712677 @default.
- W3194682018 cites W1965744338 @default.
- W3194682018 cites W1978541630 @default.
- W3194682018 cites W1997683200 @default.
- W3194682018 cites W1999153555 @default.
- W3194682018 cites W2000436896 @default.
- W3194682018 cites W2001475122 @default.
- W3194682018 cites W2007384029 @default.
- W3194682018 cites W2008608758 @default.
- W3194682018 cites W2008805335 @default.
- W3194682018 cites W2010298691 @default.
- W3194682018 cites W2011543988 @default.
- W3194682018 cites W2017624573 @default.
- W3194682018 cites W2018456659 @default.
- W3194682018 cites W2024908520 @default.
- W3194682018 cites W2027377304 @default.
- W3194682018 cites W2027570384 @default.
- W3194682018 cites W2032712035 @default.
- W3194682018 cites W2033047492 @default.
- W3194682018 cites W2037268068 @default.
- W3194682018 cites W2038686261 @default.
- W3194682018 cites W2039448500 @default.
- W3194682018 cites W2040435145 @default.
- W3194682018 cites W2040564795 @default.
- W3194682018 cites W2047389134 @default.
- W3194682018 cites W2048210508 @default.
- W3194682018 cites W2051323905 @default.
- W3194682018 cites W2059683457 @default.
- W3194682018 cites W2064506966 @default.
- W3194682018 cites W2064752085 @default.
- W3194682018 cites W2065206009 @default.
- W3194682018 cites W2071409150 @default.
- W3194682018 cites W2075959402 @default.
- W3194682018 cites W2077631779 @default.
- W3194682018 cites W2078463129 @default.
- W3194682018 cites W2099535239 @default.
- W3194682018 cites W2100767171 @default.
- W3194682018 cites W2111473359 @default.
- W3194682018 cites W2126366866 @default.
- W3194682018 cites W2130723340 @default.
- W3194682018 cites W2131817581 @default.
- W3194682018 cites W2137854548 @default.
- W3194682018 cites W2141747229 @default.
- W3194682018 cites W2149817050 @default.
- W3194682018 cites W2153952174 @default.
- W3194682018 cites W2157701438 @default.
- W3194682018 cites W2169641074 @default.
- W3194682018 cites W2180414684 @default.
- W3194682018 cites W2307242288 @default.
- W3194682018 cites W2319262231 @default.
- W3194682018 cites W2321093215 @default.
- W3194682018 cites W2324914440 @default.
- W3194682018 cites W2327419775 @default.
- W3194682018 cites W2332623155 @default.
- W3194682018 cites W2520912360 @default.
- W3194682018 cites W2527446508 @default.
- W3194682018 cites W2556159136 @default.
- W3194682018 cites W2560240921 @default.
- W3194682018 cites W2566917818 @default.
- W3194682018 cites W2592053615 @default.
- W3194682018 cites W2621589594 @default.
- W3194682018 cites W2739349692 @default.
- W3194682018 cites W2743190601 @default.
- W3194682018 cites W2773137639 @default.
- W3194682018 cites W2793136422 @default.
- W3194682018 cites W2793405256 @default.
- W3194682018 cites W2795155305 @default.
- W3194682018 cites W2805859324 @default.
- W3194682018 cites W2883322664 @default.
- W3194682018 cites W2889313189 @default.
- W3194682018 cites W2908780136 @default.
- W3194682018 cites W2915556092 @default.
- W3194682018 cites W2943225549 @default.
- W3194682018 cites W2954415804 @default.
- W3194682018 cites W2965978927 @default.
- W3194682018 cites W2972140152 @default.
- W3194682018 cites W2987913487 @default.
- W3194682018 cites W2989250385 @default.
- W3194682018 cites W3009536548 @default.
- W3194682018 cites W3010721970 @default.
- W3194682018 cites W3011015500 @default.
- W3194682018 cites W3082723442 @default.
- W3194682018 cites W3087065018 @default.
- W3194682018 cites W3087122453 @default.
- W3194682018 cites W3105793344 @default.