Densities of Na2O-K2O-CaO-MgO-FeO-Fe2O3-Al2O3-TiO2-SiO2 liquids: New measurements and derived partial molar properties

Lange, Rense; Carmichael, I. S. E.

doi:10.1016/0016-7037(87)90368-1

Cited by 665 publications

(378 citation statements)

References 59 publications

Supporting

Mentioning

353

Contrasting

Unclassified

Order By: Relevance

“…Either the experiment did not yield true neutral buoyancy, with one or both of the spheres adhering to the capsule wall, or falling/rising velocities were too low to lead to discernible movement, or the liquid was very near neutral buoyancy for one or both of the spheres but the duration of the experiment was too short for stokes Table 4 Compositional analysis on used density markers (in wt%), n is the number of analysis. Black curve is the interpreted density curve, using the calculated 1 bar density point (Lange and Carmichael, 1987) of 3.01 g cm À3 (black dot) and the experimental constraints. Dashed dotted curve is the interpreted density curve, using the calculated 1 bar density point (Ghiorso and Kress, 2004) of 2.99 g cm À3 (black star) and the experimental constraints.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Compressibility of molten Apollo 17 orange glass and implications for density crossovers in the lunar mantle

Parker

Agee

Duncan

et al. 2011

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

We performed density measurements on a synthetic equivalent of lunar Apollo 17 74,220 "orange glass", containing 9.1 wt% TiO 2 , at superliquidus conditions in the pressure range 0.5-8.5 GPa and temperature range 1723-2223 K using the sink/float technique. In the lunar pressure range, two experiments containing pure forsterite (Fo 100 ) spheres at 1.0 GPa and 1727 K, and at 1.3 GPa-1739 K, showed neutral buoyancies, indicating that the density of molten orange glass was equal to the density of Fo 100 at these conditions (3.09 ± 0.02 g cm À3 ). A third tight sink/float bracket using Fo 90 spheres corresponds to a melt density of 3.25 ± 0.02 g cm À3 at $2.8 GPa and $1838 K.Our data predict a density crossover for the molten orange glass composition with equilibrium orthopyroxene at $2.8 GPa, equivalent to a depth of $600 km in the lunar mantle, and a density of $3.25 g cm À3 . This crossover depth is close to the orange glass multiple saturation point, representing its minimum formation depth, at the appropriate oxygen fugacity (2.8-2.9 GPa). A density crossover with equilibrium olivine is predicted to fall outside the lunar pressure range (>4.7 GPa), indicating that molten orange glass is always less dense than its equilibrium olivines in the Moon. Our data therefore suggest that that lunar liquids with orange glass composition are buoyant with respect to their source region at P < $2.8 GPa, enabling their initial rise to the surface without the need for additional external driving forces.Fitting the density data to a Birch-Murnaghan equation of state at 2173 K leads to an array of acceptable solutions ranging between 16.1 and 20.3 GPa for the isothermal bulk modulus K 2173 and 3.6-8 for its pressure derivative K 0 , with best-fit values K 2173 = 18.8 GPa and K 0 = 4.4 when assuming a model 1 bar density value of 2.86 g cm À3 . When assuming a slightly lower 1 bar density value of 2.84 g cm À3 we find a range for K 2173 of 14.4-18.0 and K 0 3.7-8.7, with best-fit values of 17.2 GPa and 4.5, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%

“…To calculate the density profile of molten A17 in the lunar P range we combined our low P results with a 1 bar density anchor point of 3.01 g cm À3 , calculated using the compositional parameters of Lange and Carmichael (1987) at the estimated T liquidus of 1645 K (solid line, Fig. 2).…”

Section: Density Crossovers In the Lunar Mantlementioning

confidence: 99%

Compressibility of molten Apollo 17 orange glass and implications for density crossovers in the lunar mantle

Parker

Agee

Duncan

et al. 2011

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

show abstract

“…Density was calculated by averaging the embayment compositions from Table 1 and assuming 4.20 wt% H 2 O (major-element volume and thermal expansion data from Lange and Carmichael (1987) and H 2 O from Ochs and Lange (1999)). The ascent velocity (v) is then calculated from:…”

Section: Calculating Depth and Ascent Ratementioning

confidence: 99%

NanoSIMS results from olivine-hosted melt embayments: Magma ascent rate during explosive basaltic eruptions

Lloyd

Ruprecht

Hauri

et al. 2014

Journal of Volcanology and Geothermal Research

114

110

View full text Add to dashboard Cite

show abstract

“…Liquid density and viscosity calculations were performed, respectively, following the expressions of Bottinga and Weill (1970) and Giordano et al (2008), with thermal expansion and compressibility data from Lange and Carmichael (1987), Kress and Carmichael (1991), Toplis et al (1994), Lange (1997) and Ochs and Lange (1997;1999). Liquidus temperatures were calculated using the relation between the melt MgO content and the temperature experimentally observed by Toplis and Carroll (1995), and the liquid FeO/Fe 2 O 3 ratios were estimated by assuming fO 2 conditions along the FMQ buffer (Namur et al 2010).…”

Section: Residual Liquid Versus Stratigraphic Height and Physical Promentioning

confidence: 99%

Efficiency of compaction and compositional convection during mafic crystal mush solidification: the Sept Iles layered intrusion, Canada

Namur

Charlier

2012

Contrib Mineral Petrol

View full text Add to dashboard Cite

Adcumulate formation in mafic layered intrusions is attributed either to gravity-driven compaction, which expels the intercumulus melt out of the crystal matrix, or to compositional convection, which maintains the intercumulus liquid at a constant composition through liquid exchange with the main magma body. These processes are length-scale and time-scale dependent, and application of experimentally derived theoretical formulations to magma chambers is not straightforward. New data from the Sept Iles layered intrusion are presented and constrain the relative efficiency of these processes during solidification of the mafic crystal mush. Troctolites with meso-to ortho-cumulate texture are stratigraphically followed by Fe-Ti oxide-bearing gabbros with adcumulate texture. Calculations of intercumulus liquid fractions based on whole-rock P, Zr, V and Cr contents and detailed plagioclase compositional profiles show that both compaction and compositional convection operate, but their efficiency changes with liquid differentiation. Before saturation of Fe-Ti oxides in the intercumulus liquid, convection is not active due to the stable liquid density distribution within the crystal mush. At this stage, compaction and minor intercumulus liquid crystallization reduce the porosity to 30%. The velocity of liquid expulsion is then too slow compared with the rate of crystal accumulation. Compositional convection starts at Fe-Ti oxide-saturation in the pore melt due to its decreasing density. This process occurs together with crystallization of the intercumulus melt until the residual porosity is less than 10%. Compositional convection is evidenced by external plagioclase rims buffered at An 61 owing to continuous exchange between the intercumulus melt and the main liquid body. The change from a channel flow regime that dominates in troctolites to a porous flow regime in gabbros results from the increasing efficiency of compaction with differentiation due to higher density contrast between the cumulus crystal matrix and the equilibrium melts and to the bottom-up decreasing rate of crystal accumulation in the magma chamber.

show abstract

Densities of Na2O-K2O-CaO-MgO-FeO-Fe2O3-Al2O3-TiO2-SiO2 liquids: New measurements and derived partial molar properties

Cited by 665 publications

References 59 publications

Compressibility of molten Apollo 17 orange glass and implications for density crossovers in the lunar mantle

Compressibility of molten Apollo 17 orange glass and implications for density crossovers in the lunar mantle

NanoSIMS results from olivine-hosted melt embayments: Magma ascent rate during explosive basaltic eruptions

Efficiency of compaction and compositional convection during mafic crystal mush solidification: the Sept Iles layered intrusion, Canada

Contact Info

Product

Resources

About