Meeting Planning Services

8:30 AM

Russell S. S.* Hamilton V. E. King A. J. Salge T. Almeida N. V. et al.

Mineralogy of Bennu: Evidence from Space and Laboratory [#6397]
We compare the mineralogy of Bennu observed by scanning electron microscopy in the laboratory to that predicted from observations in space.

8:45 AM

Zega T. J.* Prince B. S. Haenecour P. Barnes J. J. Domanik K. et al.

Petrologic and Mineralogic Analysis of Bennu Aggregate Sample [#6450]
We report on a petrologic and mineralogic analysis of several Bennu particles allocated from the aggregate material that was contained within the Touch-and-Go Sample Acquisition Mechanism (TAGSAM).

9:00 AM

Thomas-Keprta K.* Le L. Keller L. P. Clemett S. J. Rahman Z. et al.

Chondrules in Returned Samples from Asteroid Bennu [#6417]
We report the first observation of chondrule bodies within samples returned from the asteroid Bennu that reveal evidence for a complex alteration history within both Bennu and its progenitor asteroid.

9:15 AM

Villeneuve J.* Piani L. Marrocchi Y. Barnes J. J. Nguyen A. N. et al.

Oxygen Isotopic Composition of Olivine Grains in Bennu Samples [#6333]
Chemical and oxygen isotopic compositions of olivine grains from the asteroid Bennu, sampled by the NASA’s OSIRIS-REx mission, provide new insights on the nature of its protolith and the dynamics of high-temperature dust in the protoplanetary disk.

9:30 AM

Tkalcec B. J.* DePauw E. Bazi B. Tack P. Vekemans B. et al.

High Resolution SR-XRF Analysis of Ca-Rich Phases in Samples Collected from Asteroid Bennu [#6107]
Spatial distributions and trace element compositions (incl. REEs) of Ca-rich carbonates and Ca-rich phosphates in Bennu samples, revealed by SR-XRF analysis, provide clues to Bennu's aqueous alteration history.

9:45 AM

Welten K. C.* Nishiizumi K. Caffee M. W. Masaryk J. Barnes J. J. et al.

Surface Exposure History of the Regolith on Asteroid Bennu Based on Cosmogenic Radionuclides in OSIRIS-REx samples [#6425]
Measurement of cosmic-ray-produced radionuclides in OSIRIS-REx samples constrain the exposure age and depth of the regolith samples collected from asteroid Bennu. The results are consistent with a short exposure in a loosely packed regolith.

10:00 AM

Thompson M. S.* Keller L. P. Seifert L. B. Melendez L. E. Snead C. J. et al.

Analysis of Bennu Particles Extracted from the OSIRIS-REx Contact Pads [#6377]
Here we present the first results from the analysis of particles extracted from the OSIRIS-REx contact pads. We will describe evidence for space weathering of Bennu material collected at the surface of the asteroid.

10:15 AM

Keller L. P.* Seifert L. B. Melendez L. Thompson M. S. Thomas-Keprta K. et al.

Impact Melts and Microcraters in Bennu Aggregate Samples [#6375]
We characterized the impact melts and impact craters on returned samples from Bennu by the OSIRIS-REx spacecraft.

10:30 AM

Sandford S. A.* Gainsforth Z. Marcus M. A. Dominguez G. Bechtel H. A. et al.

Relating Diffuse and Mineral Carbonates in Asteroid Bennu Samples Using X-Ray and Infrared Spectroscopy [#6219]
We investigate various types of carbonate materials found in several Bennu particles using the analytical techniques of X-ray absorption near-edge structure (XANES) and infrared (IR) spectroscopy to test if they are similar to those found in carbonaceous chondrites.

10:45 AM

Eckley S. A.* McCoy T. J. O'Neal E. W. Connolly H. C. Lauretta D. S.

Textural Evidence of Fluid-Rock Interactions in Bennu Samples Revealed by X-Ray Computed Tomography Scanning [#6071]
We document phases and textures that record evidence of hydrothermal alteration of Bennu's parent asteroid by X-ray CT scanning mm- to cm-sized stones.

11:00 AM

Piani L.* Marrocchi Y. Villeneuve J. Barnes J. J. Nguyen A. N. et al.

Hydrogen Isotopic Composition of Hydrous Minerals in Particles from Bennu [#6080]
To determine the nature of the ice initially accreted by Bennu's parent asteroid and its homogeneity, we measured the D/H and C/H ratios in the matrix of different Bennu particles using secondary ion mass spectrometry (SIMS).

11:15 AM

Barnes J. J.* Haenecour P. Smith L. R. Ong I. J. Wilbur Z. E. et al.

Characterization of Phosphates in Samples Returned from Asteroid Bennu [#6240]
Ca- and Mg,Na-phosphates in Bennu samples are indigenous and record parent body processing.

11:30 AM

Salge T.* Russell S. S. King A. J. Harrison C. S. Almeida N. V. et al.

Advancing SEM/EDS Microanalysis: Ultra High-Resolution Hyperspectral Imaging of Bennu Particles [#6326]
Advanced SEM/EDS analysis at high (sub-micrometre) spatial resolution and ultra-high pixel resolution allowed us to identify Mg-Na-phosphate and resolve fine-grained matrix components in Bennu particles from NASA’s OSIRIS-REx mission.

11:45 AM

Rüfenacht M. Ek M.* Meyer L. A. E. Liszewska K. M. Fehr M. A. et al.

Genetic Relationships and the Nucleosynthetic Heritage of the Asteroid Bennu [#6158]
Here we present the nucleosynthetic isotope composition of Bennu and the Ti isotope composition of hand-picked matrix fractions from CV and CR meteorites to investigate the genetic relationships within the carbonaceous reservoir.