{ "title": "Hematite in Capri Chasma", "authors": "HiRISE", "metadata": { "thumbnailURL": "https://static.uahirise.org/anews/2020-07-30/ESP_023331_1670.jpg", "excerpt": "This HiRISE image shows light-toned units beneath darker mantles." }, "version": "1.5", "identifier": "ESP_023331_1670", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#faf7f2" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: 30 July 2020" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "Hematite in Capri Chasma" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "An enhanced color cutout. Less than 1 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2020-07-30/ESP_023331_1670.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


Coarsely crystalline gray hematite is an iron oxide initially discovered from orbit by the Thermal Emission Spectrometer (TES) instrument. TES has detected gray hematite in this area of Capri Chasma, one of several large depressions that make up the Valles Marineris canyon system.

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This HiRISE image shows light-toned units beneath darker mantles. At the Opportunity landing site in Meridiani Planum, the same gray hematite is found in millimeter size globules that have weathered out of the sulfate outcrop and become concentrated along upper soils.

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It is likely that the same scenario is taking place here in Capri with the hematite grains forming in the light-toned sulfates and then eroding out and concentrating in the darker mantle soils.

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ID: ESP_023331_1670
date: 19 July 2011
altitude: 263 km

NASA/JPL/UArizona

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