S. J. Chipera
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View article: Expanded Insights into Martian Mineralogy: Updated Analysis of Gale Crater’s Mineral Composition via CheMin Crystal Chemical Investigations
Expanded Insights into Martian Mineralogy: Updated Analysis of Gale Crater’s Mineral Composition via CheMin Crystal Chemical Investigations Open
This study presents mineral composition estimates of rock and sediment samples analyzed with the CheMin X-ray diffraction instrument on board the NASA Mars Science Laboratory rover, Curiosity, in Gale crater, Mars. Mineral composition is e…
View article: The Chemistry and Mineralogy (CheMin) X-ray Diffractometer on the MSL Curiosity Rover: A Decade of Mineralogy from Gale Crater, Mars
The Chemistry and Mineralogy (CheMin) X-ray Diffractometer on the MSL Curiosity Rover: A Decade of Mineralogy from Gale Crater, Mars Open
For more than a decade, the CheMin X-ray diffraction instrument on the Mars Science Laboratory rover, Curiosity, has been returning definitive and quantitative mineralogical and mineral–chemistry data from ~3.5-billion-year-old (Ga) sedime…
View article: Miniature CVD-diamond corning drills for robotic sample collection and analysis.
Miniature CVD-diamond corning drills for robotic sample collection and analysis. Open
Coring tools have been used etlectivelv on the Moon, but to date no such tools have been used on any other extraterrestrial surface. The lunar experience includes both manual (Apollo) and robotic (Luna) systems . These coring systems were …
View article: Use of an ultrasonic/sonic driller/corer to obtain sample powder for chemin, a combined XRD/XRF instrument.
Use of an ultrasonic/sonic driller/corer to obtain sample powder for chemin, a combined XRD/XRF instrument. Open
One of the technical issues that must be addressed before landing an XRD,iXRF spectrometer on an extraterrestrial body is how best to obtain a representative sample powder for analysis. For XRD powder diffraction analyses, it is beneficial…
View article: Mineralogical Investigation of Mg‐Sulfate at the Canaima Drill Site, Gale Crater, Mars
Mineralogical Investigation of Mg‐Sulfate at the Canaima Drill Site, Gale Crater, Mars Open
For the first time on Mars, the crystalline magnesium‐sulfate mineral starkeyite (MgSO 4 ‧4H 2 O) was definitively identified using the CheMin X‐ray diffraction instrument at Gale crater. At the Canaima drill site, starkeyite along with am…
View article: Manganese-Iron Phosphate Nodules at the Groken Site, Gale Crater, Mars
Manganese-Iron Phosphate Nodules at the Groken Site, Gale Crater, Mars Open
The MSL Curiosity rover investigated dark, Mn-P-enriched nodules in shallow lacustrine/fluvial sediments at the Groken site in Glen Torridon, Gale Crater, Mars. Applying all relevant information from the rover, the nodules are interpreted …
View article: Mars Science Laboratory CheMin Data From the Glen Torridon Region and the Significance of Lake‐Groundwater Interactions in Interpreting Mineralogy and Sedimentary History
Mars Science Laboratory CheMin Data From the Glen Torridon Region and the Significance of Lake‐Groundwater Interactions in Interpreting Mineralogy and Sedimentary History Open
The Glen Torridon (GT) region in Gale crater, Mars is a region with strong clay mineral signatures inferred from orbital spectroscopy. The CheMin X‐ray diffraction (XRD) instrument onboard the Mars Science Laboratory rover, Curiosity , mea…
View article: Recent Mineralogical Discoveries in Gale Crater, Mars from the CheMin XRD Instrument, Demonstrating a Watery Past.
Recent Mineralogical Discoveries in Gale Crater, Mars from the CheMin XRD Instrument, Demonstrating a Watery Past. Open
View article: A Review of the Phyllosilicates in Gale Crater as Detected by the CheMin Instrument on the Mars Science Laboratory, Curiosity Rover
A Review of the Phyllosilicates in Gale Crater as Detected by the CheMin Instrument on the Mars Science Laboratory, Curiosity Rover Open
Curiosity, the Mars Science Laboratory (MSL) rover, landed on Mars in August 2012 to investigate the ~3.5-billion-year-old (Ga) fluvio-lacustrine sedimentary deposits of Aeolis Mons (informally known as Mount Sharp) and the surrounding pla…
View article: Brine-driven destruction of clay minerals in Gale crater, Mars
Brine-driven destruction of clay minerals in Gale crater, Mars Open
Modified clay minerals on Mars Sedimentary rocks exposed in Gale crater on Mars contain extensive clay minerals. Bristow et al. analyzed drill samples collected by the Curiosity rover as it climbed up sedimentary layers in the crater. They…
View article: Formation of Tridymite and Evidence for a Hydrothermal History at Gale Crater, Mars
Formation of Tridymite and Evidence for a Hydrothermal History at Gale Crater, Mars Open
In August 2015, the Curiosity Mars rover discovered tridymite, a high‐temperature silica polymorph, in Gale crater. The existing model for its occurrence suggests erosion and detrital sedimentation from silicic volcanic rocks in the crater…
View article: Evidence for Multiple Diagenetic Episodes in Ancient Fluvial‐Lacustrine Sedimentary Rocks in Gale Crater, Mars
Evidence for Multiple Diagenetic Episodes in Ancient Fluvial‐Lacustrine Sedimentary Rocks in Gale Crater, Mars Open
The Curiosity rover's exploration of rocks and soils in Gale crater has provided diverse geochemical and mineralogical data sets, underscoring the complex geological history of the region. We report the crystalline, clay mineral, and amorp…
View article: Mineralogy of Vera Rubin Ridge From the Mars Science Laboratory CheMin Instrument
Mineralogy of Vera Rubin Ridge From the Mars Science Laboratory CheMin Instrument Open
Vera Rubin ridge (VRR) is an erosion‐resistant feature on the northwestern slope of Mount Sharp in Gale crater, Mars, and orbital visible/shortwave infrared measurements indicate it contains red hematite. The Mars Science Laboratory Curios…
View article: Hydrothermal Precipitation of Sanidine (Adularia) Having Full Al,Si Structural Disorder and Specular Hematite at Maunakea Volcano (Hawai'i) and at Gale Crater (Mars)
Hydrothermal Precipitation of Sanidine (Adularia) Having Full Al,Si Structural Disorder and Specular Hematite at Maunakea Volcano (Hawai'i) and at Gale Crater (Mars) Open
Hydrothermal high sanidine and specular hematite are found within ferric‐rich and gray‐colored cemented basaltic breccia occurring within horizontal, weathering‐resistant strata exposed in an erosional gully of the Pu'u Poliahu cinder cone…
View article: Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater): CHEMIN: WINDJANA
Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater): CHEMIN: WINDJANA Open
The Windjana drill sample, a sandstone of the Dillinger member (Kimberley formation, Gale Crater, Mars), was analyzed by CheMin X‐ray diffraction (XRD) in the MSL Curiosity rover. From Rietveld refinements of its XRD pattern, Windjana cont…
View article: Mineralogy and geochemistry of sedimentary rocks and eolian sediments in Gale crater, Mars: A review after six Earth years of exploration with Curiosity
Mineralogy and geochemistry of sedimentary rocks and eolian sediments in Gale crater, Mars: A review after six Earth years of exploration with Curiosity Open
View article: Predicting Martian mineral compositions <i>in situ</i>: crystal chemical techniques
Predicting Martian mineral compositions <i>in situ</i>: crystal chemical techniques Open
View article: Solvent-pore interactions in the Eagle Ford shale formation
Solvent-pore interactions in the Eagle Ford shale formation Open
View article: Sand Mineralogy Within the Bagnold Dunes, Gale Crater, as Observed In Situ and From Orbit
Sand Mineralogy Within the Bagnold Dunes, Gale Crater, as Observed In Situ and From Orbit Open
Curiosity investigated active eolian sands near linear dunes during Phase 2 of the Bagnold Dunes campaign in Gale crater, Mars. Ogunquit Beach, a sample scooped from a large‐ripple trough within the Mount Desert Island ripple field and del…
View article: In Situ Analysis of Opal in Gale Crater, Mars
In Situ Analysis of Opal in Gale Crater, Mars Open
Silica enrichments resulting in up to ~90 wt% SiO 2 have been observed by the Curiosity rover's instruments in Gale crater, Mars, within the Murray and Stimson formations. Samples acquired by the rover drill revealed a significant abundanc…
View article: Clay mineral diversity and abundance in sedimentary rocks of Gale crater, Mars
Clay mineral diversity and abundance in sedimentary rocks of Gale crater, Mars Open
Clay minerals found in Gale crater, Mars, record surficial chemical weathering and changing conditions in an ancient lake.
View article: Gypsum, bassanite, and anhydrite at Gale crater, Mars
Gypsum, bassanite, and anhydrite at Gale crater, Mars Open
Analyses by the CheMin X-ray diffraction instrument on Mars Science Laboratory show that gypsum, bassanite, and anhydrite are common minerals at Gale crater. Warm conditions (∼6 to 30 °C) within CheMin drive gypsum dehydration to bassanite…
View article: Relationships between unit-cell parameters and composition for rock-forming minerals on Earth, Mars, and other extraterrestrial bodies
Relationships between unit-cell parameters and composition for rock-forming minerals on Earth, Mars, and other extraterrestrial bodies Open
Mathematical relationships between unit-cell parameters and chemical composition were developed for selected mineral phases observed with the CheMin X-ray diffractometer onboard the Curiosity rover in Gale crater. This study presents algor…
View article: Crystal chemistry of martian minerals from Bradbury Landing through Naukluft Plateau, Gale crater, Mars
Crystal chemistry of martian minerals from Bradbury Landing through Naukluft Plateau, Gale crater, Mars Open
Crystal chemical algorithms were used to estimate the chemical composition of selected mineral phases observed with the CheMin X-ray diffractometer onboard the NASA Curiosity rover in Gale crater, Mars. The sampled materials include two wi…
View article: Mineralogy of an active eolian sediment from the Namib dune, Gale crater, Mars
Mineralogy of an active eolian sediment from the Namib dune, Gale crater, Mars Open
The Mars Science Laboratory rover, Curiosity, is using a comprehensive scientific payload to explore rocks and soils in Gale crater, Mars. Recent investigations of the Bagnold Dune Field provided the first in situ assessment of an active d…
View article: Multiple stages of aqueous alteration along fractures in mudstone and sandstone strata in Gale Crater, Mars
Multiple stages of aqueous alteration along fractures in mudstone and sandstone strata in Gale Crater, Mars Open
View article: Mineralogy of an ancient lacustrine mudstone succession from the Murray formation, Gale crater, Mars
Mineralogy of an ancient lacustrine mudstone succession from the Murray formation, Gale crater, Mars Open
The Mars Science Laboratory Curiosity rover has been traversing strata at the base of Aeolis Mons (informally known as Mount Sharp) since September 2014. The Murray formation makes up the lowest exposed strata of the Mount Sharp group and …
View article: Extraction of organic compounds from representative shales and the effect on porosity
Extraction of organic compounds from representative shales and the effect on porosity Open
View article: Silicic volcanism on Mars evidenced by tridymite in high-SiO <sub>2</sub> sedimentary rock at Gale crater
Silicic volcanism on Mars evidenced by tridymite in high-SiO <sub>2</sub> sedimentary rock at Gale crater Open
Significance Tridymite, a SiO 2 mineral that crystallizes at low pressures and high temperatures (>870 °C) from high-SiO 2 materials, was detected at high concentrations in a sedimentary mudstone in Gale crater, Mars. Mineralogy and abunda…
View article: MINERALOGY OF MUDSTONE AT GALE CRATER, MARS: EVIDENCE FOR DYNAMIC LACUSTRINE ENVIRONMENTS
MINERALOGY OF MUDSTONE AT GALE CRATER, MARS: EVIDENCE FOR DYNAMIC LACUSTRINE ENVIRONMENTS Open
The Mars Science Laboratory Curiosity rover landed in Gale crater in August 2012 to assess the habitability of sedimentary deposits that show orbital evidence for diverse ancient aqueous environments. Gale crater contains a 5 km high mound…