Dolomitization of linrestone with MgCl2 solution at 150.DEG.C.. Preserved original signatures of rare earth elements and yttrium as marine limestone.

Miura, Noriko N.; Kawabe, Iwao

doi:10.2343/geochemj.34.223

Cited by 18 publications

(7 citation statements)

References 8 publications

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“…b) Miura and Kawabe (2000). c) Kawabe et al (1994 Zhang and Nozaki (1996) are also plotted as examples of present-day seawater.…”

Section: Discussionmentioning

confidence: 99%

“…Such limestones could therefore have incorporated seawater REEs without the influence of terrigenous materials (Tanaka et al, 2003;Miura et al, 2004). Hence, Japanese Permian seamount-type limestones in Ishimaki, Tahara (Aichi Prefecture), Kuzuu (Tochigi Prefecture) and Ohnogahara (Ehime Prefecture) areas (Kawabe et al, 1994;Miura and Kawabe, 2000;Tanaka et al, 2003), were used to estimate REE abundances in Permian seawater. Non-carbonate impurities constitute less than 4% of the limestone samples.…”

Section: An Application Of Experimental K D (Ree) To Estimate Of Ree mentioning

confidence: 99%

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REE abundances in ancient seawater inferred from marine limestone and experimental REE partition coefficients between calcite and aqueous solution

Tanaka

Kawabe

2006

Geochem. J.

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In our earlier work, we determined relative REE partition coefficients between calcite and aqueous (CaCl 2 + NaCl) solution, but absolute values could not be obtained because of small overgrowths of calcite. In this study, we have made similar experiments in order to determine the absolute REE partition coefficients between calcite and aqueous solution, and have evaluated partition coefficients between calcite and seawater. Calcite-supersaturated solution doped with REEs was constantly pumped into a reactor to form calcite overgrowths on the seeds under CO 2 + N 2 gas. Absolute values of REE partition coefficients,show convex tetrad effects and Y/Ho fractionation, which is consistent with our earlier work. We have calculated REE abundances in Permian seawater using the partition coefficients corrected to seawater compositions and REE analyses of Permian seamount-type limestones. All the estimated REE abundances in Permian seawater indicate concave tetrad effects, large Y/Ho fractionation and negative Ce and Eu anomalies in their chondrite-normalized patterns, which are quite similar to those for present-day seawater. The estimated REE abundances in Permian seawater, however, are lower than those in present-day seawater by approximately one order of magnitude. This suggests that significant parts of marine limestones could not incorporate seawater REEs after the permeability and porosity of the original biogenic carbonate sediments with low-REE contents had been reduced to certain critical levels.Keywords: rare earth element, partition coefficient, carbonate complex, marine limestone, tetrad effect experiments between calcite and CaCl 2 -NaCl solution. Relative partition coefficients were determined successfully, but absolute values could not be obtained because of a difficulty in evaluating the amount of calcite overgrowths. In this study, we have conducted new series of experimental runs using the same experimental system as in our earlier work, and have acquired quantitative estimates of the amount of calcite overgrowths.The purposes of this study are, (i) to determine the absolute values of REE partition coefficients between calcite and aqueous solution, (ii) to estimate REE abundances in ancient seawater from a combination of the partition coefficients and REE data of limestone samples, and (iii) to discuss the early diagenetic process of marine carbonate in terms of the incorporation of seawater REEs into marine limestones.

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“…b) Miura and Kawabe (2000). c) Kawabe et al (1994 Zhang and Nozaki (1996) are also plotted as examples of present-day seawater.…”

Section: Discussionmentioning

confidence: 99%

Section: An Application Of Experimental K D (Ree) To Estimate Of Ree mentioning

confidence: 99%

REE abundances in ancient seawater inferred from marine limestone and experimental REE partition coefficients between calcite and aqueous solution

Tanaka

Kawabe

2006

Geochem. J.

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“…Marine carbonates inherit the REE signatures of ambient seawater, except for a slight depletion of heavy REE (HREE) (Liu et al 2017). These REE signatures are not radically changed during dolomitization, provided that the dolomitization occurs in seawater-like fluids (Banner et al 1988;Qing and Mountjoy 1994;Miura and Kawabe 2000;Kamber and Webb 2001;Nothdurft et al 2004). Seawater and marine limestones generally exhibit a rare earth element (REE) profile with a marked negative Ce anomaly, but decreasing levels of oxygenation can allow greater incorporation of Ce 3þ , removing this negative anomaly, and also leading to depletion of HREE (Hayley et al 2004).…”

Section: Dolostone Geochemistrymentioning

confidence: 99%

Controls on dolomitization in extensional basins: An example from the Derbyshire Platform, U.K.

Breislin

Crowley

Banks

et al. 2020

Journal of Sedimentary Research

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Fault-controlled dolomitization has been documented in Lower Carboniferous (Viséan) platform carbonates at various localities in the Pennine Basin and North Wales. The largest of these dolomite bodies (approx. 60 km2) occurs on the Derbyshire Platform, on the southern margin of the Pennine Basin. This study tests the hypothesis that dolomitization occurred at this locality during deposition, platform drowning, and the earliest stages of burial, coincident with the transition from a late syn-rift to post-rift regime. It also assesses the importance of syn-rift volcanism on dolomitization. Planar, fabric-retentive dolomite with single-phase (i.e., low temperature) fluid inclusions occurs along NW–SE and E–W oriented faults, and in platform margin facies and in proximity to the Masson Hill Volcanic Complex. Oxygen isotope data are consistent with dolomitization from seawater, but slightly depleted δ13C values reflect mixing with magmatic fluids. Volcanic activity is likely to have produced a thermal drive for fluid circulation on the platform margin, and post-depositional alteration of basalts by CO2-rich fluids could have led to alteration of olivine and release of magnesium to convecting seawater. Consequently, the large volume of dolostone on the southern margin of the Derbyshire Platform is attributed to the increased geothermal gradient and a localized increase in the Mg/Ca ratio of dolomitizing fluids at this locality, compared to elsewhere in the Pennine Basin. The results suggest that syn-rift carbonate platforms in volcanically active areas of rift basins have a greater potential for dolomitization from seawater than non-volcanic platforms in the same basin.

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“…This is particularly relevant because, as yet, inorganic dolomite has not been synthesized at ambient conditions directly from solution (Land 1998). Most experimental inorganic dolomite formation studies have quantified the "dolomitization" of calcite (Gaines 1977;Katz and Matthews 1977;Miura and Kawabe 2000;Nordeng and Sibley 1994;Kaczmarek and Sibley 2007), other Ca-Mg carbonates (Katz and Matthews 1977;Zempolich and Baker 1993;Sibley et al 1994), or followed proto-dolomite crystallization (Malone et al 1996) or dolomite growth (Gaines 1977;Arvidson and Mackenzie 1999;Higgins and Hu 2005;Hu et al 2005Hu et al , 2006 on various carbonate seed crystals. These experiments all mimic the diagenetic dolomite formation processes.…”

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confidence: 99%

A route for the direct crystallization of dolomite

Rodríguez-Blanco

Shaw

Benning

2015

American Mineralogist

129

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The direct crystallization of dolomite from an aqueous solution at temperatures between 60-220 °C was followed in situ through time-resolved synchrotron-based energy-dispersive X-ray diffraction combined with offline high-resolution imaging, X-ray diffraction, and infrared spectroscopy. Crystalline CaMg(CO 3 ) 2 phases form through a three-stage process. In the first stage, a nanoparticulate magnesium-deficient, amorphous calcium carbonate (Mg-ACC) with a nominal formula of Ca 0.606 Mg 0.394 CO 3 ·1.37H 2 O forms. After a temperature-dependent induction time, during stage 2 the Mg-ACC partially dehydrates and orders prior to its rapid (<5 min) crystallization to non-stoichiometric proto-dolomite. This occurs via the dissolution of Mg-ACC, followed by the secondary nucleation of proto-dolomite from solution. The proto-dolomite crystallization proceeds via spherulitic growth that follows a growth front nucleation mechanism with a de-nuovo and continuous formation of nanocrystalline proto-dolomite subunits that form spherical aggregates. In stage three of the reaction, the proto-dolomite transforms to highly crystalline and stoichiometric dolomite on a much longer timescale (hours to days), via an Ostwald-ripening mechanism. Such a three-stage crystallization can explain microbially induced proto-dolomites observed in modern hypersaline settings and may also be the route by which the Cryogenian cap dolomite deposits of the Neoproterozoic formed.

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Dolomitization of linrestone with MgCl2 solution at 150.DEG.C.. Preserved original signatures of rare earth elements and yttrium as marine limestone.

Cited by 18 publications

References 8 publications

REE abundances in ancient seawater inferred from marine limestone and experimental REE partition coefficients between calcite and aqueous solution

REE abundances in ancient seawater inferred from marine limestone and experimental REE partition coefficients between calcite and aqueous solution

Controls on dolomitization in extensional basins: An example from the Derbyshire Platform, U.K.

A route for the direct crystallization of dolomite

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