Taking the pulse of Mars via dating of a plume-fed volcano
- Scottish Universities Environmental Research Centre (SUERC), East Kilbride, Scotland (United Kingdom). Isotope Geoscience Unit; Univ. of Glasgow, Scotland (United Kingdom). School of Geographical and Earth Sciences
- Scottish Universities Environmental Research Centre (SUERC), East Kilbride, Scotland (United Kingdom). Isotope Geoscience Unit; Univ. of St. Andrews, Scotland (United Kingdom). Dept. of Earth & Environmental Science
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear & Chemical Sciences Division
- Univ. of Glasgow, Scotland (United Kingdom). School of Geographical and Earth Sciences
- Scottish Universities Environmental Research Centre (SUERC), East Kilbride, Scotland (United Kingdom). Isotope Geoscience Unit
- The Natural History Museum, London (United Kingdom). Dept. of Earth Sciences
Mars hosts the solar system’s largest volcanoes. Although their size and impact crater density indicate continued activity over billions of years, their formation rates are poorly understood. Here we quantify the growth rate of a Martian volcano by 40Ar/39Ar and cosmogenic exposure dating of six nakhlites, meteorites that were ejected from Mars by a single impact event at 10.7 ± 0.8 Ma (2σ). We find that the nakhlites sample a layered volcanic sequence with at least four discrete eruptive events spanning 93 ± 12 Ma (1416 ± 7 Ma to 1322 ± 10 Ma (2σ)). A non-radiogenic trapped 40Ar/36Ar value of 1511 ± 74 (2σ) provides a precise and robust constraint for the mid-Amazonian Martian atmosphere. Our data show that the nakhlite-source volcano grew at a rate of ca. 0.4–0.7 m Ma-1—three orders of magnitude slower than comparable volcanoes on Earth, and necessitating that Mars was far more volcanically active earlier in its history.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Scottish Universities Environmental Research Centre (SUERC), East Kilbride, Scotland (United Kingdom); Univ. of Glasgow, Scotland (United Kingdom)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Aeronautics and Space Administration (NASA); Science and Technology Facilities Council (STFC) (United Kingdom)
- Grant/Contract Number:
- AC52-07NA27344; NNH14AX56I; ST/H002472/1; ST/H002960/1; ST/K000918/1
- OSTI ID:
- 1497295
- Report Number(s):
- LLNL-JRNL-739514; 892871
- Journal Information:
- Nature Communications, Vol. 8; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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