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Letter: Meridianiite: A new mineral species observed on Earth and predicted to exist on Mars
-
R.C. Peterson
,
W. Nelson
Veröffentlicht/Copyright:
1. April 2015
Abstract
Meridianiite, MgSO4·11H2O, was recently discovered on the surface of a frozen pond in central British Columbia, Canada. Meridianiite is stable below 2 °C. Above 2 °C, it melts incongruently to a slurry of epsomite (MgSO4·7H2O) and water. Magnesium sulfate minerals are thought to exist in the soils at Gusev crater and elsewhere on the Martian surface. These minerals can form by precipitation from a saturated solution or through evaporation of a brine solution at or below the surface. Meridianiite, instead of epsomite, is the expected magnesium sulfate phase in equilibrium with saturated brines below 2 °C on or below the Martian surface. It is expected to be the magnesium sulfate mineral in equilibrium with ice in the Martian polar ice caps. Meridianiite, if exposed to low humidity conditions in equatorial regions of Mars, would ultimately dehydrate to a fine dust of kieserite (MgSO4·H2O) that could be dispersed by wind across the Martian surface. The name, meridianiite, was chosen to reflect the locality on Mars where the MER rover Opportunity observed crystal molds in sedimentary rock that are thought to be caused by minerals that have since dehydrated or dissolved.
Received: 2007-4-12
Accepted: 2007-6-5
Published Online: 2015-4-1
Published in Print: 2007-10-1
© 2015 by Walter de Gruyter Berlin/Boston
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Schlagwörter für diesen Artikel
Mars;
epsomite;
new mineral;
sulfate;
hydrated magnesium sulfate;
meridianiite;
kieserite
Artikel in diesem Heft
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- Solidification and microstructures of binary ice-I/hydrate eutectic aggregates
- A monazite oxygen isotope thermometer
- The albite fusion curve re-examined: New experiments and the high-pressure density and compressibility of high albite and NaAlSi3O8 liquid
- XRD and HRTEM analyses of stacking structures in sudoite, di-trioctahedral chlorite
- Vibrational dynamics in H+-substituted forsterite: A first-principles molecular dynamics study
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- High-pressure optical spectroscopy and X-ray diffraction studies on synthetic cobalt aluminum silicate garnet
- In situ observation of the decomposition of kyanite at high pressures and high temperatures
- Mineralogy and crystal structure of bouazzerite from Bou Azzer, Anti-Atlas, Morocco: Bi-As-Fe nanoclusters containing Fe3+ in trigonal prismatic coordination
- Single-crystal structure refinement of diaspore at 50 GPa
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