Chemical composition of seawater in Neoproterozoic: Results of fluid inclusion study of halite from Salt Range (Pakistan) and Amadeus Basin (Australia)

Kovalevych, Volodymyr M.; Marshall, Torey; Peryt, Tadeusz Marek; Petrychenko, Oleh Y.; Zhukova, Svitlana A.

doi:10.1016/j.precamres.2005.10.004

Cited by 56 publications

(23 citation statements)

References 30 publications

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“…Previous studies demonstrate that daughter crystals of sylvite and carnallite in fluid inclusions from recrystallized halites dissolve at high temperatures [17,20,21] (Table 1). Primary fluid inclusions in recrystallized halite are commonly large (hundreds of microns), isolated, and irregularly shaped, and the host halites do not retain primary depositional textures and fabrics.…”

Section: Primary Versus Recrystallized Halitementioning

confidence: 90%

Anomalously High Cretaceous Paleobrine Temperatures: Hothouse, Hydrothermal or Solar Heating?

Wang

Lowenstein

2017

Minerals

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Elevated surface paleobrine temperatures (average 85.6 • C) are reported here from Cretaceous marine halites in the Maha Sarakham Formation, Khorat Plateau, Thailand. Fluid inclusions in primary subaqueous "chevron" and "cumulate" halites associated with potash salts contain daughter crystals of sylvite (KCl) and carnallite (MgCl 2 ·KCl·6H 2 O). Petrographic textures demonstrate that these fluid inclusions were trapped from the warm brines in which the halite crystallized. Later cooling produced supersaturated conditions leading to the precipitation of sylvite and carnallite daughter crystals within fluid inclusions. Dissolution temperatures of daughter crystals in fluid inclusions from the same halite bed vary over a large range (57.9 • C to 117.2 • C), suggesting that halite grew at different temperatures within and at the bottom of the water column. Consistency of daughter crystal dissolution temperatures within fluid inclusion bands and the absence of vapor bubbles at room temperature demonstrate that fluid inclusions have not stretched or leaked. Daughter crystal dissolution temperatures are reproducible to within 0.1 • C to 10.2 • C (average of 1.8 • C), and thus faithfully document paleobrine conditions. Microcrystalline hematite incorporated within halite crystals also indicate high paleobrine temperatures. We conclude that halite crystallized from warm brines rich in K-Mg-Na-Cl; sylvite and carnallite daughter crystals were nucleated during cooling of the warm brines sometime after deposition. Hothouse, hydrothermal, and solar-heating hypotheses are compared to explain the anomalously high surface paleobrine temperatures. Solar radiation stored in shallow density stratified brines is the most plausible explanation for the observed paleobrine temperatures and the progressively higher temperatures downward through the paleobrine column. The solar-heating hypothesis may also explain high paleobrine temperatures documented from fluid inclusions in other ancient halites.

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Section: Primary Versus Recrystallized Halitementioning

confidence: 90%

Anomalously High Cretaceous Paleobrine Temperatures: Hothouse, Hydrothermal or Solar Heating?

Wang

Lowenstein

2017

Minerals

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“…Residual evaporated waters are commonly trapped in evaporitic minerals and especially within one of critical interest, halite (NaCl), which is nominally Hand O-free. Fluid inclusions in sedimentary halite from marine evaporites formations were used to estimate changes in chemical composition of Proterozoic (Kovalevich et al, 2006) and Phanerozoic seawater (Johnson and Goldstein, 1993;Kovalevich et al, 1998;Lowenstein et al, 2001;Horita et al, 2002;Brennan and Lowenstein, 2002;Petrychenko et al, 2005). Fluid inclusions in natural modern and ancient halites were also used to estimate shallow surface water temperatures by using microthermometric methods (Benison, 1995;Roberts and Spencer, 1995;Lowenstein et al, 1998;Benison and Goldstein, 1999;Satterfield et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

The record of temperature, wind velocity and air humidity in the δD and δ18O of water inclusions in synthetic and Messinian halites

Rigaudier

Lécuyer

Gardien

et al. 2011

Geochimica et Cosmochimica Acta

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“…One of the recent developments to study wet grain boundaries is with high-resolution cryogenic SEM after stabilization of the water phase in the grain boundaries at cryo-temperatures. Cryo-SEM is widely used in Life Sciences (Echlin 1978;Sargent1988;Erlandsen et al 1997;Fauchadour et al 1999;Walther & Muller 1999;Frederik & Sommerdijk 2005;Marko et al 2007) but applications in Geosciences are as yet limited to studies of fluid inclusions and wettability (Fassi-Fihri et al 1992;Mann et al 1994;Chenu & Tessier 1995;Robin et al 1995;Tritlla & Cardellach 1997;Durand & Rosenberg 1998;Shepherd et al, 1998;Vizika et al 1998;Barnes et al 2003;Negre et al 2004;Kovalevych et al 2005Kovalevych et al , 2006Schenk et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Cryogenic vitrification and 3D serial sectioning using high resolution cryo‐FIB SEM technology for brine‐filled grain boundaries in halite: first results

Desbois¹,

Urai²,

Burkhardt³

et al. 2008

Geofluids

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The structure of brine films in grain boundaries of halite has been the subject of much controversy over the past 20 years; although a number of innovative methods have been developed to study these structures, much is still unknown and fundamental information is missing. In this study, we investigated different methods of plungefreezing to vitrify the brine fill of grain boundaries for natural salt polycrystal. This was followed by a preliminary study of the 3D morphology of a vitrified grain boundary in a natural rock salt sample with a focused ion beam (FIB) excavation system. We have shown that brine-filled grain boundaries in rock salt can be efficiently well frozen when dimensions are less than about 1 mm. Coupled with an ion beam tool, cryo-SEM allows 3D observation of the well-frozen grain boundaries in large volumes and high resolution. Initial results of brine-filled natural halite grain boundaries show non-faceted crystal-brine interfaces and unexpectedly low dihedral angles at room temperature and pressure.

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Chemical composition of seawater in Neoproterozoic: Results of fluid inclusion study of halite from Salt Range (Pakistan) and Amadeus Basin (Australia)

Cited by 56 publications

References 30 publications

Anomalously High Cretaceous Paleobrine Temperatures: Hothouse, Hydrothermal or Solar Heating?

Anomalously High Cretaceous Paleobrine Temperatures: Hothouse, Hydrothermal or Solar Heating?

The record of temperature, wind velocity and air humidity in the δD and δ18O of water inclusions in synthetic and Messinian halites

Cryogenic vitrification and 3D serial sectioning using high resolution cryo‐FIB SEM technology for brine‐filled grain boundaries in halite: first results

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