L. B. Breitenfeld
A5065064343- Astro and Planetary Science
- Planetary Science and Exploration
- Geochemistry and Geologic Mapping
- Isotope Analysis in Ecology
- Mineral Processing and Grinding
- Spectroscopy and Chemometric Analyses
- Spectroscopy Techniques in Biomedical and Chemical Research
- Mineralogy and Gemology Studies
- High-pressure geophysics and materials
- Laser-induced spectroscopy and plasma
- Recycling and utilization of industrial and municipal waste in materials production
- Nuclear Physics and Applications
- Clay minerals and soil interactions
- Fluid Dynamics Simulations and Interactions
- Electron and X-Ray Spectroscopy Techniques
- Geological and Geochemical Analysis
- Ziziphus Jujuba Studies and Applications
- Chemical Thermodynamics and Molecular Structure
- Non-Destructive Testing Techniques
- Space Science and Extraterrestrial Life
- Electrochemical Analysis and Applications
- Gamma-ray bursts and supernovae
- Earthquake Detection and Analysis
- Stellar, planetary, and galactic studies
- Rangeland Management and Livestock Ecology
Mount Holyoke College
2018-2024
Wesleyan University
2024
Planetary Science Institute
2024
Stony Brook University
2019-2023
Abstract During its approach to asteroid (101955) Bennu, NASA’s Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) spacecraft surveyed Bennu’s immediate environment, photometric properties, rotation state. Discovery of a dusty natural satellite, or unexpected characteristics would have had consequences for the mission’s safety observation strategy. Here we show that observations during this period were highly sensitive satellites (sub-meter...
Context. Asteroid (101955) Bennu is the target of NASA’s Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission. The spacecraft’s instruments have characterized at global local scales to select a sampling site provide context for sample that will be returned Earth. These observations include thermal infrared spectral characterization by OSIRIS-REx Thermal Emission Spectrometer (OTES). Aims. To understand degree compositional particle...
Olivine group minerals are ubiquitous in extrusive igneous rocks and play an important role constraining equilibria for samples the upper mantle above. All Raman spectra of olivine solid solution between forsterite (Fo, Mg2SiO4) fayalite (Fa, Fe2SiO4) have a high-intensity doublet 800 880 cm–1. Previous studies used small sample suites with limited compositional ranges varying spectrometers to relate energy shifts these two bands Mg/Fe contents. In this work, 93 were acquired on either...
Abstract Planetary surfaces can be complex mixtures of coarse and fine particles that exhibit linear nonlinear mixing behaviors at mid‐infrared (MIR) wavelengths. Machine learning multivariate analysis estimate modal mineralogy is favorable because it does not assume across We used partial least squares (PLS) absolute shrinkage selection operator (lasso), two types machine learning, to build MIR spectral models determine the surface asteroid (101955) Bennu using OSIRIS‐REx Thermal Emission...
Abstract Ilmenite (Fe2+TiO3) and geikielite (MgTiO3) are important terrestrial minerals relevant to the geology of Earth, Moon, Mars, meteorite samples. Raman spectroscopy is a powerful technique that allows for mineral cation determination ilmenite–geikielite solid solution. We report on suite nine samples within solution provide context their quantitative interpretation. compare univariate peak position model predicting ilmenite composition with multivariate machine learning model. The...
Abstract The Aristarchus plateau hosts a diversity of volcanic features, including the largest pyroclastic deposit on Moon, sinuous rille and intrusive extrusive examples evolved, Th-rich silicic lithologies. We provide an overview previous remote-sensing measurements new analyses Diviner Lunar Radiometer thermal IR data, Prospector Gamma Ray Spectrometer Th Chang’e-5 Microwave hyperspectral multispectral visible/near-infrared images spectra from Chandrayaan-1 Moon Mineralogy Mapper Kaguya...
Abstract Raman spectroscopy is a powerful technique in the context of planetary exploration because it provides mineral identification, chemistry, and abundance information. For spectrometers with large spot sizes, multiple phases can be investigated via collection single spectrum. There lack methodology for quantifying species mixtures due to independent signal strengths different materials spectra. Two techniques are presented this work quantification common rock-forming minerals: partial...
ABSTRACT Understanding the effects of particle size is necessary for quantifying minerals in mixtures using Raman spectroscopy. signal intensity evaluated six common silicate (two olivines, two pyroxenes, and feldspars) at 10 ranges. For olivines feldspars, highest peak intensities are observed samples with 38–63 63–106 μm sizes. There no such consistent trend pyroxene samples, although overall low strength complicates those measurements. spectra varying sizes appear to be influenced by...
Abstract Mid‐infrared (MIR) spectroscopy has been used with great success to quantitatively determine the mineralogy of geologic samples. It employed in a variety contexts from determining bulk composition powdered samples spectroscopic imaging rock thin sections via micro‐Fourier transform infrared (micro‐FTIR) spectroscopy. Recent advances allow for IR measurements at nanoscale. Near field nanoscale and broadband source (nano‐FTIR) enable understanding spatial relationships between...
Abstract Bennu, the target of OSIRIS‐REx mission, is an asteroid with compositions analogous to low petrologic type CI, CM, CR, and/or ungrouped carbonaceous chondrites. Asteroids like Bennu provide information about building blocks early Solar System. Analysis mid‐infrared remote sensing data informs mineral quantification. We apply a phyllosilicate specific model, developed by Breitenfeld et al. (2021, https://doi.org/10.1029/2021je007035 ) that distinguishes between Mg and Fe serpentines,...
This paper presents a new X-ray absorption spectroscopy (XAS) method for making two-dimensional maps of Fe3+ in-situ in polished glass samples, which opens the door to study redox changes associated with magmatic processes such as crystallization, assimilation, ascent, and eruption. Multivariate analysis (MVA) allows selection specific channels spectrum inform predictions spectral characteristics. Here, sparse model least absolute shrinkage operator (Lasso) is used select key XAS that can be...