Kanyarat Milam

Suan Sunandha Rajabhat University · Engineering

Previous studies of the Serpent Mound impact crater in southern Ohio have identified only two of the three important landforms associated with complex impact craters: the central peak and the surrounding graben (the latter coinciding with area beneath the crater floor). The third landform, the crater rim, was never identified. The diameter (7 to 8...

This study presents the first global compositional maps of plagioclase, the most abundant mineral in the Martian crust. Linear deconvolutions of spectra from the Thermal Emission Spectrometer (TES) allowed calculation of average plagioclase compositions for dust-free areas on Mars ±60° of the equator (approximately 40% of the surface for this range...

Author Institution: Division of Geological Survey, Ohio Department of Natural Resources

An anomalous carbonate breccia in the Serpent Mound impact crater in southwestern Ohio was examined and possible depositional/emplacement mechanisms were evaluated in an effort to determine its origin. This breccia was likely formed by sedimentary deposition and subsequent weathering during the Middle-Late Silurian prior to the Serpent Mound impact...

During 2015, a unique launch opportunity exists that allows for a New-Frontiers-class mission to discover a compositional gradient of small bodies in our solar system. The proposed seven year mission includes a flyby of main belt asteroid (108144) 2001 HM1, a flyby and impactor release (a la Deep Impact) at the Trojan asteroid (624) Hektor (a suspe...

An exploration of small bodies in the outer solar system can provide information on the origins, evolution, and composition of the solar system, including information on materials and processes that supported the origins of life. As part of NASA's Jet Propulsion Laboratory Planetary Science Summer School, we present a mission designed for the first...

Deformation fabrics occur in predictable cross-cutting relationships in floors and central uplifts of complex craters. The resulting petrogenetic sequence may provide another method for confirming additional complex craters on Earth and other planets.

The compositions of plagioclase, the most abundant mineral in the Martian crust, reflect changing conditions during magmatic evolution. Plagioclase contains spectral features at thermal infrared wavelengths that permit its detection by thermal emission spectrometers (Thermal Emission Spectrometer (TES), Thermal Emission Imaging System (THEMIS), and...

Morphologic, morphometric, and thermophysical aspects of domical structures in a restricted part of the Mars northern plains were characterized using Mars Odyssey and Mars Global Surveyor data. The majority of domical structures consist of relatively high thermal inertia, subcircular to irregularly shaped “core’ bodies surrounded by adjacent, relat...

We examine breccias from the interior of the Flynn Creek impact structure in Tennessee, U.S. for evidence of a chondritic or iron meteoritic component.

Four definitive and three probable rayed craters have been identified on Mars using 100-m resolution thermal infrared images obtained by the Mars Odyssey Thermal Emission Imaging System (THEMIS). These seven craters are similar to the previously discovered rayed crater Zunil and are best recognized by a distinct thermal contrast with respect to the...

The Dycus Disturbance, a small, suspected impact structure in Jackson County, TN, is all but unknown to the impact community. We review the previous research which was conducted over a half century ago, and present the preliminary results from the current field work.

Rocks on the floor of Gusev crater are basalts of uniform composition and mineralogy. Olivine, the only mineral to have been identified or inferred from data by all instruments on the Spirit rover, is especially abundant in these rocks. These picritic basalts are similar in many respects to certain Martian meteorites (olivine-phyric shergottites)....

Impact craters provide natural exposures of subsurface composition, stratigraphy and, in some cases, geologic features that are not otherwise exposed at the surface. Here we present results from a THEMIS-based remote sensing study of martian impact craters that expose subsurface materials.

Hawkins Impact Cave is the only cave in the world known to have formed in the central uplift of a complex crater. The subterranean view it provides offers a unique, three-dimensional view into central uplift formation.

The analysis of six landing sites that were candidates for the two NASA Mars Exploration Rovers (MER) benefited from recently available image data from the Thermal Emission Imaging Spectrometer (THEMIS) onboard the 2001 Mars Odyssey spacecraft. The combination of daytime and nighttime thermal infrared images from THEMIS supplemented by additional d...

An examination of the petrogenesis of central uplifts in complex terrestrial craters and the common paragenetic sequence that deformation features display.

Olivine-rich basalts at the Spirit landing site have many similarities with olivine-phyric shergottites and olivine determined from orbital thermal emission spectroscopy.

Additional discoveries of large martian rayed craters in THEMIS TIR images has interesting implications for possible source regions of the Martain Meteorites. Links between rayed craters as seen in THEMIS TIR, possible source regions and the MM are presented.

Modal mineralogies of a suite of terrestrial alkalic rocks were determined by both electron microprobe mapping and deconvolution of thermal emission spectra. Modeled modes were then compared to laboratory measured modes to access their accuracy.

It is widely accepted that the volcanic rocks on the surface of Mars are basic to intermediate in composition. A few locations on Mars, however, have been considered by some workers as possibly consisting of silicic volcanic rocks, based primarily on morphologic considerations. If it could be demonstrated that silicic volcanism occurred on the surf...

The Spirit landing site in Gusev Crater on Mars contains dark, fine-grained, vesicular rocks interpreted as lavas. Pancam and Mini-Thermal Emission Spectrometer (Mini-TES) spectra suggest that all of these rocks are similar but have variable coatings and dust mantles. Magnified images of brushed and abraded rock surfaces show alteration rinds and v...

Plagioclase, the most abundant mineral in many terrestrial and Martian igneous rocks, exhibits a range of compositions that reflects changing conditions during crystallization. Thermal emission spectrometers (TES, THEMIS, and Mini-TES) on board Mars spacecraft provide a means of determining average plagioclase compositions directly. We demonstrate...

This study examines central uplift formation in complex craters using the Middlesboro impact structure as a case study.

Spirit landed in a flat plain in Gusev crater with local undulations at meters scales generated by ridges covered with blocks, some of them looking rounded. Several, flat-topped, mesas are visible in the far field in direction of Ma adim Vallis. A set of north/south oriented hills reaches approximately 150 m elevation to the east of the landing sit...

The Howell Structure is a roughly circular feature about 2.5 km in diameter, comprising brecciated, deformed, and disturbed sedimentary strata, located at 35 degrees 13.9 min N and 86 degrees 36.6 min W. The structure is centered on the unincorporated village of Howell, in Lincoln County, Tennessee, USA, about 110 km SSE of Nashville, TN. The featu...

Spirit landed in a flat plain in Gusev crater. Observations (topography, morphology, rocks, soil and surfacial material) are tested against hypotheses (aeolian, volcanic, aqueous, glacial, impact) that have been proposed to explain the depositional history of material in Gusev.

1] Gusev crater, previously interpreted as the depocenter for the Gusev-Ma'adim Vallis fluvio-lacustrine system, is a proposed landing site for one of the Mars Exploration Rovers (MER). Here we use new remote-sensing data from the Thermal Emission Imaging System (THEMIS) supplemented by data from the Thermal Emission Spectrometer (TES), Mars Orbite...

The northern plains of Mars contain several high concentrations (Acidalia, Utopia, Elysium, etc.) of small (

This study uses THEMIS, TES, MOC, and MOLA data, and a new surface unit map and stratigraphic sequence to evaluate various depositional hypotheses for Gusev crater. We further examine how a MER landing in Gusev might evaluate depositional models.

This is Part II of a study to evaluate three crystallization models (MELTS, MAGPOX, and COMAGMAT) using three rock compositions at three fO2s. Care should be taken when choosing a model as no single model is best suited for every composition or fO2.

This is Part I of a study evaluating three models used to simulate magma crystallization (MELTS, MAGPOX, and COMAGMAT). No single program is a best fit for all melt compositions.

Gusev Crater (160 km diameter) is hypothesized to have been a lacustrine depocenter, making it a prime landing site candidate for Mars Exploration Rover (MER) missions. Primary flow and sediment transport originated from Ma'adim Vallis, a large channel that debouches into Gusev, with outflow through the NW crater rim. Interior units of Gusev have b...

This study examines the effects of plagioclase zoning in thermal emission spectra using a new technique of experimental analysis developed at the University of Tennessee and Arizona State University.

The effects of depletion of intracellular levels of the polyamines putrescine and spermidine on cis-diamminedichloroplatinum(II)-induced cytotoxicity, sister chromatid exchanges, DNA interstrand cross-linking, and intracellular glutathione levels were studied in 9L rat brain tumor cells pretreated with the ornithine decarboxylase inhibitor (2R,5R)-...

We studied the effects of the ornithine decarboxylase inhibitors (2R,5R)-6-heptyne-2,5-diamine (R,R,-MAP) and alpha-difluoromethylornithine (DFMO) on cell proliferation and polyamine metabolism in 9L rat brain tumour cells. Treatment with 5 microM R,R-MAP inhibited cell proliferation to the same extent as did treatment with 1 mM DFMO. Both inhibito...

We present the results of our weeklong study of sending a New Frontiers-class mission to a Jupiter Trojan asteroid and to a trans-Neptunian object. Our design calls for a seven-year mission, including a flyby of main belt asteroid (108144) 2001 HM1, a flyby and impactor release (à la Deep Impact) at Jupiter Trojan (624) Hector (a suspected contact...

This study examines how zoning may affect modeled plagioclase compositions in thermal emission spectra.

This study determines the accuracy to which plagioclase compositions can be derived in multi-component mixtures of (pure) plagioclase, the most abundant mineral phase at the martian surface.

Here we report the accuracy of derived plagioclase feldspar compositions from multi-phase mixtures analogous to typical martian lithologies.

This study examines morphological and spectral data sets from a region in the northern plains of Mars informally known as the Tyndall Dome Field (TDF) for evidence of silicic volcanism.