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Fe-rich X-ray amorphous material records past climate and persistence of water on Mars

Space Sciences

Fe-rich X-ray amorphous material records past climate and persistence of water on Mars

A. D. Feldman, E. M. Hausrath, et al.

This groundbreaking research by Anthony D. Feldman and colleagues explores the intriguing world of X-ray amorphous material found in Martian sediments. With implications for understanding the ancient climates of Mars, their study highlights how the formation and longevity of this material vary with climate conditions, suggesting a timeline of past aqueous alterations and environmental changes on the planet.

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Playback language: English
Abstract
X-ray amorphous material comprises 15–73 wt.% of sedimentary rocks and eolian sediments in Gale crater, Mars. This material is variably siliceous and iron-rich but aluminum-poor. The presence of volatiles suggests incipient weathering products. This study investigates X-ray amorphous material formation and longevity in terrestrial iron-rich soils with varying ages and climates. Results indicate in situ aqueous alteration is needed to concentrate iron. Cooler climates promote amorphous material persistence, while warmer climates favor crystalline phases. Martian Fe-rich X-ray amorphous material formation and persistence are consistent with past cool, wet environments followed by long-term cold, dry conditions.
Publisher
Communications Earth & Environment
Published On
Jul 07, 2024
Authors
Anthony D. Feldman, Elisabeth M. Hausrath, Elizabeth B. Rampe, Valerie Tu, Tanya S. Peretyazhko, Christopher DeFelice, Thomas Sharp
Tags
X-ray amorphous material
Mars
sedimentary rocks
climate effects
aqueous alteration
iron-rich soils
environmental conditions

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