Dataset for: Observations on feldspathic glass in the shergottites Northwest Africa (NWA) 12241, NWA 15628, and Dhofar 019: Implications for the origin of “maskelynite”
Sponsor
This research was made possible by the support of Sigma Xi [G 20230315 5130], the Barringer Crater Family Fund, the PSU Geology department, and the Geological Society of the Oregon Country (GSOC).
Document Type
Dataset
Publication Date
2026
Abstract
Maskelynite, here referred to as feldspathic glass, is the most abundant high-pressure phase produced by shock in extraterrestrial rocks, but controversies over its formation have limited its utility. It shows features that are in line with both melt and solid-state transformation models, thereby leading to major uncertainties about its significance. Here, we propose a new model (the “hybrid model”) for the formation of maskelynite that explains its behavior based on new findings. Furthermore, we explore the utility of using maskelynite to infer shock-durations with this proposed model. Using best estimates of applicable shock temperatures, inferred shock durations are 0.23 ± 0.17 ms, 0.81 ± 0.11 ms, and 26.9 ± 2.2 ms for Northwest Africa (NWA) 12241, Dho 019, and NWA 15628, respectively. These values are comparable to literature estimates of ~1-100 ms for shergottites.
Rights
This work is marked with CC0 1.0 Universal
DOI
10.15760/geology-data.10
Persistent Identifier
https://archives.pdx.edu/ds/psu/44656
Recommended Citation
Anim, George A. and Ruzicka, Alexander M., "Dataset for: Observations on feldspathic glass in the shergottites Northwest Africa (NWA) 12241, NWA 15628, and Dhofar 019: Implications for the origin of “maskelynite”" (2026). https://doi.org/10.15760/geology-data.10
csv. file_7 tables _Observations on feldspathic glass
Description
This data supports an article being published in Meteoritics and Planetary Science.
Data include information about the samples that were studied, the chemical compositions of phases, linescan profile widths, averaged EBSD data, and a summary table detailing feldspathic glass and the models they satisfy.