Academic literature on the topic 'Australasian tektite/microtektite strewn field'

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Journal articles on the topic "Australasian tektite/microtektite strewn field"

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Di Vincenzo, Gianfranco, Luigi Folco, Martin D. Suttle, Lauren Brase, and Ralph P. Harvey. "Multi-collector 40Ar/39Ar dating of microtektites from Transantarctic Mountains (Antarctica): A definitive link with the Australasian tektite/microtektite strewn field." Geochimica et Cosmochimica Acta 298 (April 2021): 112–30. http://dx.doi.org/10.1016/j.gca.2021.01.046.

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Folco, Luigi, Massimo D'Orazio, Maurizio Gemelli, and Pierre Rochette. "Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains." Polar Science 10, no. 2 (2016): 147–59. http://dx.doi.org/10.1016/j.polar.2016.02.004.

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Schnetzler, C. C., L. S. Walter, and J. G. Marsh. "Source of the Australasian Tektite Strewn Field: A possible off-shore impact site." Geophysical Research Letters 15, no. 4 (1988): 357–60. http://dx.doi.org/10.1029/gl015i004p00357.

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Campanale, Fabrizio, Enrico Mugnaioli, Luigi Folco, et al. "Evidence for subsolidus quartz-coesite transformation in impact ejecta from the Australasian tektite strewn field." Geochimica et Cosmochimica Acta 264 (November 2019): 105–17. http://dx.doi.org/10.1016/j.gca.2019.08.014.

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Pan, Qing, Zhiyong Xiao, Yanxue Wu, Yunhua Wu, and Pan Yan. "Magnetite in Muong Nong‐Type Australasian Tektites From South China." Geochemistry, Geophysics, Geosystems 24, no. 10 (2023). http://dx.doi.org/10.1029/2023gc011103.

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AbstractSouth China belongs to the northern geographic branch of the Australasian strewn field (AASF) of tektites and microtektites, and this area is assumed to be part of the uprange region of the putative impactor trajectory that formed the yet undiscovered source crater. Ferromagnetic minerals in impact glass may record the magnetization process and thermal history of impact melt, but the possible identity of ferromagnetic minerals in AASF tektites from South China is elusive. Here, we perform a rock magnetism and crystallography study of iron‐sulfur spherules in Muong Nong‐type tektites fr
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Campanale, Fabrizio, Enrico Mugnaioli, Luigi Folco, Paola Parlanti, and Mauro Gemmi. "TiO2II: the high-pressure Zr-free srilankite endmember in impact rocks." July 19, 2023. https://doi.org/10.5281/zenodo.8165269.

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Supporting data for manuscript:&nbsp;<strong><em>TiO<sub>2</sub>II: the high-pressure Zr-free srilankite endmember in impact rocks.&nbsp;</em></strong>Included here: Raman spectroscopy data, PACOM map, all HRTEM data, and 3DED raw data of cr04 (TiO<sub>2</sub>II sample 1144a_16), cr09 (coesite&nbsp;sample 1144a_12), cr07 (TiO<sub>2</sub>II sample 1144a_12), cr15&nbsp;(TiO<sub>2</sub>II sample 1144a_12) cr18 (rutile&nbsp;sample 1144a_12).
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Boschi, S., S. Goderis, S. Liao, and W. Li. "Compositional and Textural Variability Among Tektites From Indochina and South China: Insights Into the Impact Origin of the Australasian Tektite Strewn Field." Geochemistry, Geophysics, Geosystems 26, no. 4 (2025). https://doi.org/10.1029/2024gc012133.

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AbstractThe Australasian tektite strewn field, approximately 0.8 Ma in age, covers nearly 10% of the Earth's surface, making it the largest and most recent strewn field globally. This study provides a comprehensive analysis of the elemental composition and texture of tektites recovered from various locations within the strewn field, particularly Vietnam, Thailand, and South China. These tektites exhibit a consistent major and minor element composition similar to the Upper Continental Crust characteristic of normal tektites. Notable elemental deviations in the concentrations of CaO, FeO, MgO, P
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Folco, L., E. Mugnaioli, M. Masotta, and B. P. Glass. "Coesite discovered in Australasian microtektites." Geology, June 3, 2025. https://doi.org/10.1130/g53151.1.

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Microtektites are microscopic glass spherules produced by large impacts on Earth. Whether they formed as impact melt droplets or as condensates from a target-dominated vapor plume is debated. Combining optical, scanning, and transmission electron microscopy, we studied microscopic silica-rich inclusions in four Australasian microtektites to search for high-pressure phases produced by shock metamorphism in the precursor materials. Three microtektites are from deep-sea sediment cores close to the putative impact location in Southeast Asia, and one is from the Transantarctic Mountains at the extr
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Carter, Jack, Paolo Sanchez, Anthony J. Fuentes, Paul R. Renne, Dale H. Burns, and Hermann D. Bermúdez. "Inferences of Source Lithologies for Chicxulub Microtektites Using a Bayesian Approach." Geochemistry, Geophysics, Geosystems 26, no. 3 (2025). https://doi.org/10.1029/2024gc011924.

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AbstractThe Chicxulub impact on the Yucatán Peninsula at the Cretaceous‐Paleogene boundary (KPB) was a likely contributor to the end‐Cretaceous mass extinction. Glassy objects produced by quenched melt from the impact were distributed over a large region centered on the Caribbean basin and have long been known to preserve compositional information that could allow for more robust constraints on the pre‐impact target lithologies. The Chicxulub‐derived glasses are generally altered in most localities, but a recently discovered deposit at Gorgonilla Island, Colombia, yields a large percentage of
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Masotta, Matteo, Stefano Peres, Luigi Folco, et al. "3D X-ray tomographic analysis reveals how coesite is preserved in Muong Nong-type tektites." Scientific Reports 10, no. 1 (2020). http://dx.doi.org/10.1038/s41598-020-76727-6.

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AbstractMuong Nong-type (MN) tektites are a layered type of tektite associated to the Australasian strewn field, the youngest (790 kyr) and largest on Earth. In some MN tektites, coesite is observed in association with relict quartz and silica glass within inclusions surrounded by a froth layer. The formation of coesite-bearing frothy inclusions is here investigated through a 3D textural multiscale analysis of the vesicles contained in a MN tektite sample, combined with compositional and spectroscopic data. The vesicle size distribution testifies to a post-shock decompression that induced melt
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Book chapters on the topic "Australasian tektite/microtektite strewn field"

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Mizera, Jiří, Zdeněk Řanda, Václav Suchý, et al. "Parent crater for Australasian tektites beneath the sands of the Alashan Desert, Northwest China: Best candidate ever?" In In the Footsteps of Warren B. Hamilton: New Ideas in Earth Science. Geological Society of America, 2022. http://dx.doi.org/10.1130/2021.2553(25).

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ABSTRACT Australasian tektites represent the largest group of tektites on Earth, and their strewn field covers up to one sixth of Earth’s surface. After several decades of fruitless quest for a parent crater for Australasian tektites, mostly in the main part of the strewn field in Indochina, the crater remains undiscovered. We elaborate upon a recently suggested original hypothesis for the impact in the Alashan Desert in Northwest China. Evidence from geochemical and isotopic compositions of potential source materials, gravity data, and geographic, paleoenvironmental, and ballistic considerati
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Davias, Michael E., and Thomas H. S. Harris. "Postulating an unconventional location for the missing mid-Pleistocene transition impact: Repaving North America with a cavitated regolith blanket while dispatching Australasian tektites and giving Michigan a thumb." In In the Footsteps of Warren B. Hamilton: New Ideas in Earth Science. Geological Society of America, 2022. http://dx.doi.org/10.1130/2021.2553(24).

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ABSTRACT This thesis embraces and expands upon a century of research into disparate geological enigmas, offering a unifying catastrophic explanation for events occurring during the enigmatic mid-Pleistocene transition. Billions of tons of “Australasian tektites” were dispatched as distal ejecta from a target mass of continental sediments during a cosmic impact occurring ca. 788 ka. The accepted signatures of a hypervelocity impact encompass an excavated astrobleme and attendant proximal, medial, and distal ejecta distributions. Enigmatically, the distal tektites remain the only accepted eviden
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