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Article in Journal

Amazonian chemical weathering rate derived from stony meteorite finds at Meridiani Planum on Mars

Citation
Schröder C, Bland P, Golombek M, Ashley J, Warner N & Grant J (2016) Amazonian chemical weathering rate derived from stony meteorite finds at Meridiani Planum on Mars, Nature Communications, 7, Art. No.: 13459.

Abstract
Spacecraft exploring Mars, notably the Mars Exploration Rovers Spirit and Opportunity as well as the Mars Science Laboratory or Curiosity rover, have accumulated evidence for wet and habitable conditions on Early Mars more than 3 billion years ago. Current conditions, by contrast, are cold, extremely arid, and seemingly inhospitable. To evaluate exactly how dry today’s environment is, it is important to understand currently ongoing weathering processes. Here we present chemical weathering rates determined for Mars. We use the oxidation of iron in stony meteorites investigated by the Mars Exploration Rover Opportunity at Meridiani Planum. Their maximum exposure age is constrained by the formation of Victoria crater and their minimum age by erosion of the meteorites. The chemical weathering rates thus derived are ~1 to 4 orders of magnitude slower than that of similar meteorites found in Antarctica where the slowest rates are observed on Earth.

Keywords
geochemistry; meteoritics

StatusPublished
AuthorsSchröder Christian, Bland Phil, Golombek Matthew, Ashley James, Warner Nicholas, Grant John
Publication date online11/11/2016
Date accepted by journal26/09/2016
PublisherSpringer Nature
ISSN 2041-1723
LanguageEnglish

Journal
Nature Communications: Volume 7

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