Day: February 11, 2015

High-temperature equilibrium isotope fractionation of non-traditional stable isotopes: Experiments, theory, and applications

Posted by

0

1Young, E.D., 1Manning, C.E., 1Schauble, E.A., 2Shahar, A., 3Macris, C.A., 2Lazar, C., Jordan, M.
1Department of Earth, Planetary and Space Sciences, UCLA, United States
2Geophysical Laboratory, Carnegie Institution of Washington, United States
3California Institute of Technology, United States

We currently do not have a copyright agreement with this publisher and cannot display the abstract here

Reference
Young ED, Manning CE, Schauble EA, Shahar A, Macris CA, Lazar C, Jordan M (2015) High-temperature equilibrium isotope fractionation of non-traditional stable isotopes: Experiments, theory, and applications. Chemical Geology 395, 176-195
Link to Article [DOI: 10.1016/j.chemgeo.2014.12.013]

Study of olivine-rich dark halo crater – Beaumont L in mare Nectaris using High resolution remote sensing data

Posted by

0

1,2Prabhjot Kaur, 1,2Prakash Chauhan, 1,2A.S. Rajawat, 1,2A.S. Kiran Kumar
1Space Applications Centre, ISRO, Ahmedabad-380015, India
2Nirma University, Ahmedabad, India

Study of dark-haloed craters (DHCs) can provide important information about the geology, mineralogy and evolution of certain hidden mare deposits known as cryptomare. Some DHCs have been identified in the Mare Nectaris region of the near side of the Moon. Beaumont L represents one such DHC situated on the western flank of the Nectaris basin. Moon Mineralogical Mapper (M3) images were used to investigate the composition of DHCs. Morphological investigations have been carried out using Terrain mapping Camera (TMC) and Lunar Reconnaissance Orbiter Camera Narrow Angle Camera (LROC) images. The morphological details captured by TMC and LROC Narrow Angle Camera (NAC) images provide evidence that Beaumont-L is of impact origin and do not show evidence of a volcanic origin. The compositional analysis using M3 data, indicate the presence of an olivine rich cryptomare unit excavated due to the Beaumont L impact. Our study also confirms that the band I feature in the reflectance spectra of Beaumont L is completely attributable to olivine deposits without contribution from any type of glass/melt deposits. The presence of olivine in Beaumont L suggests either excavation of olivine-rich cryptomare or a subsurface mafic pluton.

Reflectance
Kaur P, Chauhan P, Rajawat AS, Kumar ASK (2015) Study of olivine-rich dark halo crater – Beaumont L in mare Nectaris using High resolution remote sensing data. Icarus (in Press)
Link to Article [doi:10.1016/j.pss.2015.02.001]

Copyright Elsevier