Publications by Kerri Donaldson Hanna

Space weathering effects in Diviner Lunar Radiometer multispectral infrared measurements of the lunar Christiansen Feature: Characteristics and mitigation

ICARUS 283 (2017) 343-351

PG Lucey, BT Greenhagen, E Song, JA Arnold, M Lemelin, KD Hanna, NE Bowles, TD Glotch, DA Paige

Global assessment of pure crystalline plagioclase across the Moon and implications for the evolution of the primary crust


KLD Hanna, LC Cheek, CM Pieters, JF Mustard, BT Greenhagen, IR Thomas, NE Bowles

The distribution and purity of anorthosite across the Orientale basin: New perspectives from Moon Mineralogy Mapper data

Journal of Geophysical Research: Planets 118 (2013) 1805-1820

LC Cheek, KL Donaldson Hanna, CM Pieters, JW Head, JL Whitten

Laboratory emissivity measurements of the plagioclase solid solution series under varying environmental conditions

Journal of Geophysical Research E: Planets 117 (2012)

KL Donaldson Hanna, IR Thomas, NE Bowles, BT Greenhagen, CM Pieters, JF Mustard, CRM Jackson, MB Wyatt

New laboratory thermal infrared emissivity measurements of the plagioclase solid solution series over the 1700∼400cm -1 (6-25m) spectral range are presented. Thermal infrared (TIR) spectral changes for fine-particulate samples (0-25m) are characterized for the first time under different laboratory environmental conditions: ambient (terrestrial-like), half-vacuum (Mars-like), vacuum, and vacuum with cooled chamber (lunar-like). Under all environmental conditions the Christiansen Feature (CF) is observed to vary in a systematic way with Na-rich end-member (albite) having a CF position at the highest wave number (shortest wavelength) and the Ca-rich end-member (anorthite) having a CF position with the lowest wave number (longest wavelength). As pressure decreases to < 10 -3 mbar four observations are made: (1) the CF position shifts to higher wave numbers, (2) the spectral contrast of the CF increases relative to the RB, (3) the spectral contrast of the RB in the ∼1200-900 spectral range decreases while the spectral contrast of the RB in the ∼800-400 spectral range either increases or remains the same and (4) the TF disappears. A relationship between the wavelength position of the CF measured under simulated lunar conditions and plagioclase composition (An#) is developed. Although its exact form may evolve with additional data, this linear relationship should be applied to current and future TIR data sets of the Moon. Our new spectral measurements demonstrate how sensitive thermal infrared emissivity spectra of plagioclase feldspars are to the environmental conditions under which they are measured and provide important constraints for interpreting current and future thermal infrared data sets. © 2012 American Geophysical Union. All Rights Reserved.

Thermal infrared emissivity measurements under a simulated lunar environment: Application to the Diviner Lunar Radiometer Experiment

Journal of Geophysical Research E: Planets 117 (2012)

KL Donaldson Hanna, MB Wyatt, IR Thomas, NE Bowles, BT Greenhagen, A Maturilli, J Helbert, DA Paige

We present new laboratory thermal infrared emissivity spectra of the major silicate minerals identified on the Moon measured under lunar environmental conditions and evaluate their application to lunar remote sensing data sets. Thermal infrared spectral changes between ambient and lunar environmental conditions are characterized for the first time over the 400∼1700 cm -1 (6-25 m) spectral range for a fine-particulate mineral suite including plagioclase (albite and anorthite), pyroxene (enstatite and augite), and olivine (forsterite). The lunar environment introduces observable effects in thermal infrared emissivity spectra of fine particulate minerals, which include: (1) a shift in the Christiansen feature (CF) position to higher wave numbers (shorter wavelengths), (2) an increase in the overall spectral contrast, and (3) decreases in the spectral contrast of the reststrahlen bands and transparency features. Our new measurements demonstrate the high sensitivity of thermal infrared emissivity spectra to environmental conditions under which they are measured and provide important constraints for interpreting new thermal infrared data sets of the Moon, including the Diviner Lunar Radiometer Experiment onboard NASA's Lunar Reconnaissance Orbiter. Full resolution laboratory mineral spectra convolved to Diviner's three spectral channels show that spectral shape, CF position and band ratios can be used to distinguish between individual mineral groups and lunar lithologies. The integration of the thermal infrared CF position with near infrared spectral parameters allows for robust mineralogical identifications and provides a framework for future integrations of data sets across two different wavelength regimes. Copyright 2012 by the American Geophysical Union.

A new experimental setup for making thermal emission measurements in a simulated lunar environment.

The Review of scientific instruments 83 (2012) 124502-

IR Thomas, BT Greenhagen, NE Bowles, KL Donaldson Hanna, J Temple, SB Calcutt

One of the key problems in determining lunar surface composition for thermal-infrared measurements is the lack of comparable laboratory-measured spectra. As the surface is typically composed of fine-grained particulates, the lunar environment induces a thermal gradient within the near sub-surface, altering the emission spectra: this environment must therefore be simulated in the laboratory, considerably increasing the complexity of the measurement. Previous measurements have created this thermal gradient by either heating the cup in which the sample sits or by illuminating the sample using a solar-like source. This is the first setup able to measure in both configurations, allowing direct comparisons to be made between the two. Also, measurements across a wider spectral range and at a much higher spectral resolution can be acquired using this new setup. These are required to support new measurements made by the Diviner Lunar Radiometer, the first multi-spectral thermal-infrared instrument to orbit the Moon. Results from the two different heating methods are presented, with measurements of a fine-grained quartz sample compared to previous similar measurements, plus measurements of a common lunar highland material, anorthite. The results show that quartz gives the same results for both methods of heating, as predicted by previous studies, though the anorthite spectra are different. The new calibration pipeline required to convert the raw data into emissivity spectra is described also.

Analysis of lunar pyroclastic deposit FeO abundances by LRO Diviner

Journal of Geophysical Research: Planets 117 (2012) n/a-n/a

CC Allen, BT Greenhagen, KL Donaldson Hanna, DA Paige

Highly silicic compositions on the moon

Science 329 (2010) 1510-1513

TD Glotch, PG Lucey, JL Bandfield, BT Greenhagen, IR Thomas, RC Elphic, N Bowles, MB Wyatt, CC Allen, KD Hanna, DA Paige

Using data from the Diviner Lunar Radiometer Experiment, we show that four regions of the Moon previously described as "red spots" exhibit mid-infrared spectra best explained by quartz, silica-rich glass, or alkali feldspar. These lithologies are consistent with evolved rocks similar to lunar granites in the Apollo samples. The spectral character of these spots is distinct from surrounding mare and highlands material and from regions composed of pure plagioclase feldspar. The variety of landforms associated with the silicic spectral character suggests that both extrusive and intrusive silicic magmatism occurred on the Moon. Basaltic underplating is the preferred mechanism for silicic magma generation, leading to the formation of extrusive landforms. This mechanism or silicate liquid immiscibility could lead to the formation of intrusive bodies.

Global Silicate Mineralogy of the Moon from the Diviner Lunar Radiometer

SCIENCE 329 (2010) 1507-1509

BT Greenhagen, PG Lucey, MB Wyatt, TD Glotch, CC Allen, JA Arnold, JL Bandfield, NE Bowles, KLD Hanna, PO Hayne, E Song, IR Thomas, DA Paige

Vesta and the HED meteorites: Mid-infrared modeling of minerals and their abundances

Meteoritics & Planetary Science 44 (2009) 1755-1770

KD Hanna, AL Sprague

Spectral emissivity measurements of Mercury's surface indicate Mg- and Ca-rich mineralogy, K-spar, Na-rich plagioclase, rutile, with possible perovskite, and garnet

Planetary and Space Science 57 (2009) 364-383

AL Sprague, KL Donaldson Hanna, RWH Kozlowski, J Helbert, A Maturilli, JB Warell, JL Hora

Mercury: Mid-infrared (3-13.5 μm) observations show heterogeneous composition, presence of intermediate and basic soil types, and pyroxene

Meteoritics & Planetary Science 37 (2002) 1255-1268