Imperial College London
Alternate

DrMatthewGenge

Faculty of Engineering, Department of Earth Science & Engineering

Senior Lecturer in Earth and Planetary Science
 
 
 
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Contact

 

+44 (0)20 7594 6499m.genge

 
 
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Location

 

1.45Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Van:2018:10.1016/j.gca.2018.02.041,
author = {Van, Ginneken M and Genge, MJ and Harvey, R},
doi = {10.1016/j.gca.2018.02.041},
journal = {Geochimica et Cosmochimica Acta},
pages = {81--94},
title = {A new type of highly-vaporized microtektite from the Transantarctic Mountains},
url = {http://dx.doi.org/10.1016/j.gca.2018.02.041},
volume = {228},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We report on the discovery of microtektites (microscopic impact glass spherules) in a glacial moraine near Larkman Nunatak in the Transantarctic Mountains, Antarctica. The microtektites were identified based on their physical and chemical properties. Major and trace element compositions of the particles suggest that they may be related to the Australasian strewn field. This would further extend the current strewn field ~800 km southward. Depletion in volatiles and enrichment in refractory elements in Larkman Nunatak microtektites fit the volatilization trend defined by Australasian microtektites, suggesting that they may represent a new highly vapor fractionated member thereof. This observation is supported by their low vesicularity and absence of mineral inclusions. This discovery has strong implications for the formation of microtektites (i.e. their evolution with respect to the distance from the source crater). Finally, the discovery of potentially old (i.e. 0.8 Ma) microtektites in moraine has implications for the stability of the East Antarctic Ice Sheet in the Larkman Nunatak area over the last ~1 Ma and, as a consequence, the high efficiency of such moraines as traps for other extraterrestrial materials (e.g. micrometeorites and meteoritic ablation debris).
AU  - Van,Ginneken M
AU  - Genge,MJ
AU  - Harvey,R
DO  - 10.1016/j.gca.2018.02.041
EP  - 94
PY  - 2018///
SN  - 0016-7037
SP  - 81
TI  - A new type of highly-vaporized microtektite from the Transantarctic Mountains
T2  - Geochimica et Cosmochimica Acta
UR  - http://dx.doi.org/10.1016/j.gca.2018.02.041
UR  - http://hdl.handle.net/10044/1/57799
VL  - 228
ER  -
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