Ryan Bradley Anderson (Former Employee)
Science and Products
Filter Total Items: 30
Complex bedding geometry in the upper portion of Aeolis Mons, Gale crater, Mars
The Upper formation of Aeolis Mons in Gale crater exhibits curvilinear bedding patterns on the surfaces of several erosional benches that have been interpreted as cross-bedding. We use High Resolution Imaging Science Experiment (HiRISE) stereo topography to test this hypothesis by measuring the bedding geometry within these benches. The bedding geometry is consistent with aeolian cross...
Authors
Ryan Anderson, Lauren A. Edgar, David M. Rubin, Kevin W. Lewis, Claire E. Newman
Basalt–trachybasalt samples in Gale Crater, Mars
The ChemCam instrument on the Mars Science Laboratory (MSL) rover, Curiosity, observed numerous igneous float rocks and conglomerate clasts, reported previously. A new statistical analysis of single‐laser‐shot spectra of igneous targets observed by ChemCam shows a strong peak at ~55 wt% SiO2 and 6 wt% total alkalis, with a minor secondary maximum at 47–51 wt% SiO2 and lower alkali...
Authors
Peter H. Edwards, John W. Bridges, Roger C. Wiens, Ryan Anderson, M. Darby Dyar, Martin R. Fisk, Lucy M. Thompson, Patrick J. Gasda, Justin Filiberto, Susanne P. Schwenzer, Diana L. Blaney, Ian Hutchinson
The Mars Science Laboratory Curiosity rover Mastcam instruments: Preflight and in-flight calibration, validation, and data archiving
The NASA Curiosity rover Mast Camera (Mastcam) system is a pair of fixed-focal length, multispectral, color CCD imagers mounted ~2 m above the surface on the rover's remote sensing mast, along with associated electronics and an onboard calibration target. The left Mastcam (M-34) has a 34 mm focal length, an instantaneous field of view (IFOV) of 0.22 mrad, and a FOV of 20° × 15° over the...
Authors
James F. Bell, A. Godber, S. McNair, M.A. Caplinger, J.N. Maki, M. T. Lemmon, J. L. van Beek, M.C. Malin, D. Wellington, K.M. Kinch, M.B. Madsen, Craig J. Hardgrove, M.A. Ravine, E. Gray Jensen, D. Harker, Ryan Anderson, Kenneth E. Herkenhoff, R.V. Morris, E. Cisneros, R.G. Deen
Shaler: in situ analysis of a fluvial sedimentary deposit on Mars
This paper characterizes the detailed sedimentology of a fluvial sandbody on Mars for the first time and interprets its depositional processes and palaeoenvironmental setting. Despite numerous orbital observations of fluvial landforms on the surface of Mars, ground-based characterization of the sedimentology of such fluvial deposits has not previously been possible. Results from the NASA...
Authors
Lauren A. Edgar, Sanjeev Gupta, David M. Rubin, Kevin W. Lewis, Gary A. Kocurek, Ryan Anderson, James F. Bell, Gilles Dromart, Kenneth S. Edgett, John P. Grotzinger, Craig J. Hardgrove, Linda C. Kah, Richard J. Léveillé, Michael C. Malin, Nicholas Mangold, Ralph E. Milliken, Michelle E. Minitti, Marisa C. Palucis, Melissa S. Rice, Scott K. Rowland, Juergen Schieber, Kathryn M. Stack, Dawn Y. Sumner, Roger C. Wiens, Rebecca M.E. Williams, Amy J. Williams
Diagenetic silica enrichment and late-stage groundwater activity in Gale crater, Mars
Diagenetic silica enrichment in fracture-associated halos that crosscut lacustrine and unconformably overlying aeolian sedimentary bedrock is observed on the lower north slope of Aeolis Mons in Gale crater, Mars. The diagenetic silica enrichment is colocated with detrital silica enrichment observed in the lacustrine bedrock yet extends into a considerably younger, unconformably draping...
Authors
Jens Frydenvang, Patrick J. Gasda, Joel A. Hurowitz, John P. Grotzinger, Roger C. Wiens, Horton E. Newsom, Ken S. Edgett, Jessica A. Watkins, John W. Bridges, Sylvestre Maurice, Martin R. Fisk, Jeffrey R. Johnson, William Rapin, Nathan T. Stein, Sam M. Clegg, S. P. Schwenzer, C.C. Bedford, P. Edwards, Nicolas Mangold, Agnès Cousin, Ryan Anderson, Valerie Payre, David T. Vaniman, David W. Blake, Nina L. Lanza, Sanjeev Gupta, Jason K. Van Beek, Violaine Sautter, Pierre-Yves Meslin, Melissa S. Rice, Ralf Milliken, Ralf Gellert, Lucy M. Thompson, Ben C. Clark, Dawn Y. Sumner, Abigail A. Fraeman, Kjartan M. Kinch, Morten Bo Madsen, Igor Mitofranov, Insoo Jun, Fred J. Calef, Ashwin R. Vasavada
Recalibration of the Mars Science Laboratory ChemCam instrument with an expanded geochemical database
The ChemCam Laser-Induced Breakdown Spectroscopy (LIBS) instrument onboard the Mars Science Laboratory (MSL) rover Curiosity has obtained > 300,000 spectra of rock and soil analysis targets since landing at Gale Crater in 2012, and the spectra represent perhaps the largest publicly-available LIBS datasets. The compositions of the major elements, reported as oxides (SiO2, TiO2, Al2O3...
Authors
Samuel M. Clegg, Roger C. Wiens, Ryan Anderson, Olivier Forni, Jens Frydenvang, Jeremie Lasue, Agnès Cousin, Valerie Payre, Tommy Boucher, M. Darby Dyar, Scott M. McLennan, Richard W. Morris, Trevor G. Graff, Stanley A Mertzman, Bethany L. Ehlmann, Ines Belgacem, Horton E. Newsom, Ben C. Clark, Noureddine Melikechi, Alissa Mezzacappa, Rhonda E. McInroy, Ronald Martinez, Patrick J. Gasda, Olivier Gasnault, Sylvestre Maurice
Improved accuracy in quantitative laser-induced breakdown spectroscopy using sub-models
Accurate quantitative analysis of diverse geologic materials is one of the primary challenges faced by the Laser-Induced Breakdown Spectroscopy (LIBS)-based ChemCam instrument on the Mars Science Laboratory (MSL) rover. The SuperCam instrument on the Mars 2020 rover, as well as other LIBS instruments developed for geochemical analysis on Earth or other planets, will face the same...
Authors
Ryan Anderson, Samuel M. Clegg, Jens Frydenvang, Roger C. Wiens, Scott M. McLennan, Richard W. Morris, Bethany L. Ehlmann, M. Darby Dyar
Chemistry of diagenetic features analyzed by ChemCam at Pahrump Hills, Gale crater, Mars
The Curiosity rover's campaign at Pahrump Hills provides the first analyses of lower Mount Sharp strata. Here we report ChemCam elemental composition of a diverse assemblage of post-depositional features embedded in, or cross-cutting, the host rock. ChemCam results demonstrate their compositional diversity, especially compared to the surrounding host rock: (i) Dendritic aggregates and...
Authors
Marion Nachon, Nicolas Mangold, Olivier Forni, Linda C. Kah, Agnès Cousin, Roger C. Wiens, Ryan Anderson, Diana L. Blaney, Jen G. Blank, Fred J. Calef, Samuel M. Clegg, Cecile Fabre, Martin R. Fisk, Olivier Gasnault, John P. Grotzinger, Rachel Kronyak, Nina L. Lanza, Jeremie Lasue, Laetitia Le Deit, Stephane Le Mouélic, Sylvestre Maurice, Pierre-Yves Meslin, D. Z. Oehler, Valerie Payre, William Rapin, Susanne Schroder, Katherine M. Stack, Dawn Y. Sumner
ChemCam activities and discoveries during the nominal mission of the Mars Science Laboratory in Gale crater, Mars
At Gale crater, Mars, ChemCam acquired its first laser-induced breakdown spectroscopy (LIBS) target on Sol 13 of the landed portion of the mission (a Sol is a Mars day). Up to Sol 800, more than 188 000 LIBS spectra were acquired on more than 5800 points distributed over about 650 individual targets. We present a comprehensive review of ChemCam scientific accomplishments during that...
Authors
Sylvestre Maurice, Samuel M. Clegg, Roger C. Wiens, Olivier Gasnault, William Rapin, O. Forni, Agnès Cousin, V. Sautter, Nicolas Mangold, L. Le Deit, Marion Nachon, Ryan Anderson, Nina L. Lanza, Cecile Fabre, Valerie Payre, Jeremie Lasue, Pierre-Yves Meslin, Richard J. Léveillé, Bruce Barraclough, Pierre Beck, Steven C. Bender, Gilles Berger, John W. Bridges, Nathan T. Bridges, Gilles Dromert, M. Darby Dyar, Raymond Francis, Jens Frydenvang, Brigitte Gondet, Bethany L. Ehlmann, Kenneth E. Herkenhoff, Jeffrey R. Johnson, Yves Langevin, Madsen Morten B., Noureddine Melikechi, James M LaCour, Stephane Le Mouélic, Eric Lewin, Horton E. Newsom, Ann M. Ollila, Patrick Pinet, S. Schroder, Jean-Baptiste Sirven, Robert L. Tokar, M.J. Toplis, Claude d'Uston, David T. Vaniman, Ashwin R. Vasavada
The potassic sedimentary rocks in Gale Crater, Mars, as seen by ChemCam Onboard Curiosity
The Mars Science Laboratory rover Curiosity encountered potassium-rich clastic sedimentary rocks at two sites in Gale Crater, the waypoints Cooperstown and Kimberley. These rocks include several distinct meters thick sedimentary outcrops ranging from fine sandstone to conglomerate, interpreted to record an ancient fluvial or fluvio-deltaic depositional system. From ChemCam Laser-Induced...
Authors
Laetitia Le Deit, Nicolas Mangold, Olivier Forni, Agnès Cousin, Jeremie Lasue, Susanne Schroder, Roger C. Wiens, Dawn Y. Sumner, Cecile Fabre, Katherine M. Stack, Ryan Anderson, Diana L. Blaney, Samuel M. Clegg, Gilles Dromart, Martin R. Fisk, Olivier Gasnault, John P. Grotzinger, Sanjeev Gupta, Nina L. Lanza, Stephane Le Mouélic, Sylvestre Maurice, Scott M. McLennan, Pierre-Yves Meslin, Marion Nachon, Horton E. Newsom, Valerie Payre, William Rapin, Melissa S. Rice, Violaine Sautter, Allan H. Treiman
Composition of conglomerates analyzed by the Curiosity rover: Implications for Gale Crater crust and sediment sources
No abstract available.
Authors
Nicolas Mangold, L.M. Thompson, O. Forni, Cecile Fabre, L. Le Deit, R. C. Wiens, A.J. Williams, R. S. Williams, Ryan Anderson, Diana L. Blaney, Fred J. Calef, Agnès Cousin, Samuel M. Clegg, Gilles Dromart, William E. Dietrich, Kenneth S. Edgett, Martin R. Fisk, Olivier Gasnault, Ralf Gellert, John P. Grotzinger, Linda C. Kah, Stephane Le Mouélic, Scott M. McLennan, Sylvestre Maurice, Pierre-Yves Meslin, Horton E. Newsom, Marisa C. Palucis, William Rapin, Violaine Sautter, Kirsten L. Siebach, Katherine M. Stack, Dawn Y. Sumner, Aileen Yingst
ChemCam results from the Shaler outcrop in Gale crater, Mars
The ChemCam campaign at the fluvial sedimentary outcrop “Shaler” resulted in observations of 28 non-soil targets, 26 of which included active laser induced breakdown spectroscopy (LIBS), and all of which included Remote Micro-Imager (RMI) images. The Shaler outcrop can be divided into seven facies based on grain size, texture, color, resistance to erosion, and sedimentary structures. The...
Authors
Ryan Anderson, J.C. Bridges, A. Park Williams, L. Edgar, A. Ollila, J. S. Williams, Marion Nachon, N. Mangold, M. R. Fisk, Juergen Schieber, S. Gupta, Gilles Dromart, R. C. Wiens, Stephane Le Mouélic, O. Forni, N. Lanza, Alissa Mezzacappa, V. Sautter, D. Blaney, B. T. Clark, S. M. Clegg, Olivier Gasnault, Jeremie Lasue, Richard J. Léveillé, E. Lewin, K.W. Lewis, S. Maurice, H. Newsom, S.P. Schwenzer, D. T. Vaniman
Science and Products
Filter Total Items: 30
Complex bedding geometry in the upper portion of Aeolis Mons, Gale crater, Mars
The Upper formation of Aeolis Mons in Gale crater exhibits curvilinear bedding patterns on the surfaces of several erosional benches that have been interpreted as cross-bedding. We use High Resolution Imaging Science Experiment (HiRISE) stereo topography to test this hypothesis by measuring the bedding geometry within these benches. The bedding geometry is consistent with aeolian cross...
Authors
Ryan Anderson, Lauren A. Edgar, David M. Rubin, Kevin W. Lewis, Claire E. Newman
Basalt–trachybasalt samples in Gale Crater, Mars
The ChemCam instrument on the Mars Science Laboratory (MSL) rover, Curiosity, observed numerous igneous float rocks and conglomerate clasts, reported previously. A new statistical analysis of single‐laser‐shot spectra of igneous targets observed by ChemCam shows a strong peak at ~55 wt% SiO2 and 6 wt% total alkalis, with a minor secondary maximum at 47–51 wt% SiO2 and lower alkali...
Authors
Peter H. Edwards, John W. Bridges, Roger C. Wiens, Ryan Anderson, M. Darby Dyar, Martin R. Fisk, Lucy M. Thompson, Patrick J. Gasda, Justin Filiberto, Susanne P. Schwenzer, Diana L. Blaney, Ian Hutchinson
The Mars Science Laboratory Curiosity rover Mastcam instruments: Preflight and in-flight calibration, validation, and data archiving
The NASA Curiosity rover Mast Camera (Mastcam) system is a pair of fixed-focal length, multispectral, color CCD imagers mounted ~2 m above the surface on the rover's remote sensing mast, along with associated electronics and an onboard calibration target. The left Mastcam (M-34) has a 34 mm focal length, an instantaneous field of view (IFOV) of 0.22 mrad, and a FOV of 20° × 15° over the...
Authors
James F. Bell, A. Godber, S. McNair, M.A. Caplinger, J.N. Maki, M. T. Lemmon, J. L. van Beek, M.C. Malin, D. Wellington, K.M. Kinch, M.B. Madsen, Craig J. Hardgrove, M.A. Ravine, E. Gray Jensen, D. Harker, Ryan Anderson, Kenneth E. Herkenhoff, R.V. Morris, E. Cisneros, R.G. Deen
Shaler: in situ analysis of a fluvial sedimentary deposit on Mars
This paper characterizes the detailed sedimentology of a fluvial sandbody on Mars for the first time and interprets its depositional processes and palaeoenvironmental setting. Despite numerous orbital observations of fluvial landforms on the surface of Mars, ground-based characterization of the sedimentology of such fluvial deposits has not previously been possible. Results from the NASA...
Authors
Lauren A. Edgar, Sanjeev Gupta, David M. Rubin, Kevin W. Lewis, Gary A. Kocurek, Ryan Anderson, James F. Bell, Gilles Dromart, Kenneth S. Edgett, John P. Grotzinger, Craig J. Hardgrove, Linda C. Kah, Richard J. Léveillé, Michael C. Malin, Nicholas Mangold, Ralph E. Milliken, Michelle E. Minitti, Marisa C. Palucis, Melissa S. Rice, Scott K. Rowland, Juergen Schieber, Kathryn M. Stack, Dawn Y. Sumner, Roger C. Wiens, Rebecca M.E. Williams, Amy J. Williams
Diagenetic silica enrichment and late-stage groundwater activity in Gale crater, Mars
Diagenetic silica enrichment in fracture-associated halos that crosscut lacustrine and unconformably overlying aeolian sedimentary bedrock is observed on the lower north slope of Aeolis Mons in Gale crater, Mars. The diagenetic silica enrichment is colocated with detrital silica enrichment observed in the lacustrine bedrock yet extends into a considerably younger, unconformably draping...
Authors
Jens Frydenvang, Patrick J. Gasda, Joel A. Hurowitz, John P. Grotzinger, Roger C. Wiens, Horton E. Newsom, Ken S. Edgett, Jessica A. Watkins, John W. Bridges, Sylvestre Maurice, Martin R. Fisk, Jeffrey R. Johnson, William Rapin, Nathan T. Stein, Sam M. Clegg, S. P. Schwenzer, C.C. Bedford, P. Edwards, Nicolas Mangold, Agnès Cousin, Ryan Anderson, Valerie Payre, David T. Vaniman, David W. Blake, Nina L. Lanza, Sanjeev Gupta, Jason K. Van Beek, Violaine Sautter, Pierre-Yves Meslin, Melissa S. Rice, Ralf Milliken, Ralf Gellert, Lucy M. Thompson, Ben C. Clark, Dawn Y. Sumner, Abigail A. Fraeman, Kjartan M. Kinch, Morten Bo Madsen, Igor Mitofranov, Insoo Jun, Fred J. Calef, Ashwin R. Vasavada
Recalibration of the Mars Science Laboratory ChemCam instrument with an expanded geochemical database
The ChemCam Laser-Induced Breakdown Spectroscopy (LIBS) instrument onboard the Mars Science Laboratory (MSL) rover Curiosity has obtained > 300,000 spectra of rock and soil analysis targets since landing at Gale Crater in 2012, and the spectra represent perhaps the largest publicly-available LIBS datasets. The compositions of the major elements, reported as oxides (SiO2, TiO2, Al2O3...
Authors
Samuel M. Clegg, Roger C. Wiens, Ryan Anderson, Olivier Forni, Jens Frydenvang, Jeremie Lasue, Agnès Cousin, Valerie Payre, Tommy Boucher, M. Darby Dyar, Scott M. McLennan, Richard W. Morris, Trevor G. Graff, Stanley A Mertzman, Bethany L. Ehlmann, Ines Belgacem, Horton E. Newsom, Ben C. Clark, Noureddine Melikechi, Alissa Mezzacappa, Rhonda E. McInroy, Ronald Martinez, Patrick J. Gasda, Olivier Gasnault, Sylvestre Maurice
Improved accuracy in quantitative laser-induced breakdown spectroscopy using sub-models
Accurate quantitative analysis of diverse geologic materials is one of the primary challenges faced by the Laser-Induced Breakdown Spectroscopy (LIBS)-based ChemCam instrument on the Mars Science Laboratory (MSL) rover. The SuperCam instrument on the Mars 2020 rover, as well as other LIBS instruments developed for geochemical analysis on Earth or other planets, will face the same...
Authors
Ryan Anderson, Samuel M. Clegg, Jens Frydenvang, Roger C. Wiens, Scott M. McLennan, Richard W. Morris, Bethany L. Ehlmann, M. Darby Dyar
Chemistry of diagenetic features analyzed by ChemCam at Pahrump Hills, Gale crater, Mars
The Curiosity rover's campaign at Pahrump Hills provides the first analyses of lower Mount Sharp strata. Here we report ChemCam elemental composition of a diverse assemblage of post-depositional features embedded in, or cross-cutting, the host rock. ChemCam results demonstrate their compositional diversity, especially compared to the surrounding host rock: (i) Dendritic aggregates and...
Authors
Marion Nachon, Nicolas Mangold, Olivier Forni, Linda C. Kah, Agnès Cousin, Roger C. Wiens, Ryan Anderson, Diana L. Blaney, Jen G. Blank, Fred J. Calef, Samuel M. Clegg, Cecile Fabre, Martin R. Fisk, Olivier Gasnault, John P. Grotzinger, Rachel Kronyak, Nina L. Lanza, Jeremie Lasue, Laetitia Le Deit, Stephane Le Mouélic, Sylvestre Maurice, Pierre-Yves Meslin, D. Z. Oehler, Valerie Payre, William Rapin, Susanne Schroder, Katherine M. Stack, Dawn Y. Sumner
ChemCam activities and discoveries during the nominal mission of the Mars Science Laboratory in Gale crater, Mars
At Gale crater, Mars, ChemCam acquired its first laser-induced breakdown spectroscopy (LIBS) target on Sol 13 of the landed portion of the mission (a Sol is a Mars day). Up to Sol 800, more than 188 000 LIBS spectra were acquired on more than 5800 points distributed over about 650 individual targets. We present a comprehensive review of ChemCam scientific accomplishments during that...
Authors
Sylvestre Maurice, Samuel M. Clegg, Roger C. Wiens, Olivier Gasnault, William Rapin, O. Forni, Agnès Cousin, V. Sautter, Nicolas Mangold, L. Le Deit, Marion Nachon, Ryan Anderson, Nina L. Lanza, Cecile Fabre, Valerie Payre, Jeremie Lasue, Pierre-Yves Meslin, Richard J. Léveillé, Bruce Barraclough, Pierre Beck, Steven C. Bender, Gilles Berger, John W. Bridges, Nathan T. Bridges, Gilles Dromert, M. Darby Dyar, Raymond Francis, Jens Frydenvang, Brigitte Gondet, Bethany L. Ehlmann, Kenneth E. Herkenhoff, Jeffrey R. Johnson, Yves Langevin, Madsen Morten B., Noureddine Melikechi, James M LaCour, Stephane Le Mouélic, Eric Lewin, Horton E. Newsom, Ann M. Ollila, Patrick Pinet, S. Schroder, Jean-Baptiste Sirven, Robert L. Tokar, M.J. Toplis, Claude d'Uston, David T. Vaniman, Ashwin R. Vasavada
The potassic sedimentary rocks in Gale Crater, Mars, as seen by ChemCam Onboard Curiosity
The Mars Science Laboratory rover Curiosity encountered potassium-rich clastic sedimentary rocks at two sites in Gale Crater, the waypoints Cooperstown and Kimberley. These rocks include several distinct meters thick sedimentary outcrops ranging from fine sandstone to conglomerate, interpreted to record an ancient fluvial or fluvio-deltaic depositional system. From ChemCam Laser-Induced...
Authors
Laetitia Le Deit, Nicolas Mangold, Olivier Forni, Agnès Cousin, Jeremie Lasue, Susanne Schroder, Roger C. Wiens, Dawn Y. Sumner, Cecile Fabre, Katherine M. Stack, Ryan Anderson, Diana L. Blaney, Samuel M. Clegg, Gilles Dromart, Martin R. Fisk, Olivier Gasnault, John P. Grotzinger, Sanjeev Gupta, Nina L. Lanza, Stephane Le Mouélic, Sylvestre Maurice, Scott M. McLennan, Pierre-Yves Meslin, Marion Nachon, Horton E. Newsom, Valerie Payre, William Rapin, Melissa S. Rice, Violaine Sautter, Allan H. Treiman
Composition of conglomerates analyzed by the Curiosity rover: Implications for Gale Crater crust and sediment sources
No abstract available.
Authors
Nicolas Mangold, L.M. Thompson, O. Forni, Cecile Fabre, L. Le Deit, R. C. Wiens, A.J. Williams, R. S. Williams, Ryan Anderson, Diana L. Blaney, Fred J. Calef, Agnès Cousin, Samuel M. Clegg, Gilles Dromart, William E. Dietrich, Kenneth S. Edgett, Martin R. Fisk, Olivier Gasnault, Ralf Gellert, John P. Grotzinger, Linda C. Kah, Stephane Le Mouélic, Scott M. McLennan, Sylvestre Maurice, Pierre-Yves Meslin, Horton E. Newsom, Marisa C. Palucis, William Rapin, Violaine Sautter, Kirsten L. Siebach, Katherine M. Stack, Dawn Y. Sumner, Aileen Yingst
ChemCam results from the Shaler outcrop in Gale crater, Mars
The ChemCam campaign at the fluvial sedimentary outcrop “Shaler” resulted in observations of 28 non-soil targets, 26 of which included active laser induced breakdown spectroscopy (LIBS), and all of which included Remote Micro-Imager (RMI) images. The Shaler outcrop can be divided into seven facies based on grain size, texture, color, resistance to erosion, and sedimentary structures. The...
Authors
Ryan Anderson, J.C. Bridges, A. Park Williams, L. Edgar, A. Ollila, J. S. Williams, Marion Nachon, N. Mangold, M. R. Fisk, Juergen Schieber, S. Gupta, Gilles Dromart, R. C. Wiens, Stephane Le Mouélic, O. Forni, N. Lanza, Alissa Mezzacappa, V. Sautter, D. Blaney, B. T. Clark, S. M. Clegg, Olivier Gasnault, Jeremie Lasue, Richard J. Léveillé, E. Lewin, K.W. Lewis, S. Maurice, H. Newsom, S.P. Schwenzer, D. T. Vaniman