Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity

摘要: Multispectral measurements in the visible and near infrared of rocks at Meridiani Planum by Mars Exploration Rover Opportunity's Pancam are described. The multispectral data show that outcrops Burns formation consist two main spectral units which stretched 673, 535, 432 nm color composites appear buff- purple-colored. These referred to as HFS LFS based on higher lower values 482 535 slope. Spectral characteristics consistent with outcrop consisting less oxidized, more iron-bearing minerals. surfaces not common appear, primarily, distal ends layers steep, massive surfaces, locations subject greater eolian erosion. Consequently, interpreted a weathering rind. Further inherent differences between different map units, both untouched patches abraded rover's Rock Abrasion Tool, also Comparisons parameters set laboratory reflectance Fe^(3+)–bearing minerals field plots fields hematite, ferrihydrite, poorly crystalline goethite, schwertmannite. Rind fracture fill materials, observed intermittently exposures, intermediate their character classes other, surface materials (basaltic sands, spherules, cobbles).