OM12L_001 Sample Data for Teaching
E. Leask, Oct 2016


Sample:
A rock was collected from an travertine conglomerate, containing ophiolite clasts. The rock was collected in Oman near the Samail ophiolite (collected Jan 2012; B. Ehlmann; analyzed in Leask & Ehlmann, 2016).

Data folder:
ftp://ftp.gps.caltech.edu/pub/ehlmann/Leask_and_Ehlmann_2016_OM12001_hyperspectralcube/

Data included are:

1) UCIS (Ultra-Compact Imaging Spectrometer; B. Van Gorp et al) data cube. Data near ends of sensor may be suspect [e.g. under 500 nm, over 2500 nm]. {OM12L_001_UCIS_cube_masked}

2) EDS-SEM mosaic image cube (4x downsampled to despeckle, using a nearest neighbour algorithm).
Acquired Caltech October 2015. Chemical data are in atomic %. {om12L_001_SEM_4x_masked}

3) EDS-SEM data warped to UCIS cube [degree 4 convolution, using built-in ENVI warping algorithm and hand-picked ground-control points]. Three UCIS images were mosaicked together to build the base image. Note whole image difficult to match 100% perfectly; easier to line up a smaller subset. {OM12L_001_warp_SEM_to_UCIS}

4) XRD data (quantitative analysis done Aug 2015 by Actlabs). Note that the subsamples of the rock crushed for XRD analysis are not the same subsample imaged, although all come from the same rock. 

5) Photographs of rock sample for context (taken by C.Sanders, 2014). {Macro_OM12L_001.JPG; OM12L_001_smoothface_2.jpg}

6) A .pdf of Leask & Ehlmann, 2016, describing the mineralogy and elemental chemistry of this rock using imaging spectroscopy, XRD, and SEM/EDS {Leask_and_Ehlmann_WHISPERS_2016_paper_58.pdf}


References:
Leask, Ellen K. and Ehlmann, Bethany L. (2016) Identifying and Quantifying Mineral Abundance through VSWIR Microimaging Spectroscopy: A Comparison to XRD and SEM. In: 8th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS 2016), 21-24 August 2016, Los Angeles, CA. (In Press)
http://authors.library.caltech.edu/70145/ 

Van Gorp, B., et al. (2014). "Ultra-compact imaging spectrometer for remote, in situ, and microscopic planetary mineralogy." Journal of Applied Remote Sensing 8(1):084988-084988.
http://authors.library.caltech.edu/45237/