Liquidus temperatures of the Skaergaard magma

@article{Thy2009LiquidusTO,
  title={Liquidus temperatures of the Skaergaard magma},
  author={Peter Thy and Christian Tegner and Charles E. Lesher},
  journal={American Mineralogist},
  year={2009},
  volume={94},
  pages={1371 - 1376}
}
Abstract The liquidus temperatures of the Skaergaard intrusion can be estimated for the layered series from plagioclase compositions. Plagioclase saturation in one-atmosphere melting experiments on evolved North Atlantic basalts is a function of An content (mol%) and can be described by an empirical linear relationship [T (°C) = 899 + 3.6 An; 1σ = 20 °C]. This relationship predicts a total crystallization interval for the intrusion of ~150 °C. Plagioclase crystallized in the Hidden Zone (An71… 

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References

SHOWING 1-10 OF 47 REFERENCES

The compositional evolution of differentiated liquids from the Skaergaard Layered Series as determined by geochemical thermometry

Based on the COMAGMAT-3.65 crystallization model a set of phase equilibria calculations (called geochemical thermometry) have been conducted at P=1 kbar and closed conditions with respect to oxygen

Letter. Toward a thermal model for the Skaergaard liquidus

Abstract After a review of history, it is shown that in a comprehensive 1-atm study by McBirney and Naslund (1990), the Skaergaard liquidus temperature is linear from LZa to UZa on stratigraphic

An igneous plagioclase thermometer

An empirical approach has been taken to develop a geothermometer based on plagioclase-magmatic liquid equilibrium. Compositions of coexisting plagioclase and liquid (glass) obtained by electron

Plagioclase in the Skaergaard intrusion. Part 1: Core and rim compositions in the layered series

The anorthite content of plagioclase grains (XAn) in 12 rocks from the layered series of the Skaergaard intrusion has been studied by electron microprobe (typically ∼30 core and ∼70 rim analyses per

Experimental constraints on the Skaergaard liquid line of descent

Differentiation and Compaction in the Skaergaard Intrusion

Igneous differentiation processes are constrained from bulk compositions, densities and mineral modes of 116 cumulate gabbro samples in a new reference profile through the Layered Series of the

Phase Relations and Liquid Lines of Descent in Hydrous Ferrobasalt—Implications for the Skaergaard Intrusion and Columbia River Flood Basalts

Crystallization experiments using a hydrous ferrobasalt as starting material, conducted at 200MPa, 940^12008C, at a wide range of water activities (0 1^1) and redox conditions (QFM 3 to QFMþ 4, where

The Skaergaard liquid line of descent revisited

There is a fundamental conflict between the suggestion that the iron content of Skaergaard liquids increases during Fe–Ti oxide fractionation and the observation that at the same time oxygen fugacity