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Tracing the aqueous alteration history between Isidis and Hellas Planitiae on Mars

Tirsch, Daniela und Bishop, J. L. und Voigt, Joana R.C. und Tornabene, Livio L. und Viviano, C. und Lane, M.D. und Loizeau, Damien und Sacks, L. (2021) Tracing the aqueous alteration history between Isidis and Hellas Planitiae on Mars. The Geological Society of America (GSA). GSA Connects 2021, 2021-10-10 - 2021-10-13, hybrid; Portland, Oregon, USA. doi: 10.1130/abs/2021AM-365395.

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Offizielle URL: https://gsa.confex.com/gsa/2021AM/meetingapp.cgi/Paper/365395

Kurzfassung

We initiated our study of the morphology and mineralogy of aqueous outcrops at Libya Montes (LM) at the southern rim of the Isidis impact basin. The Noachian to Amazonian aged rocks there result from a complex history of impact, volcanic, tectonic, fluvial, and aeolian processes. Our work involved coordinated studies using HRSC, CRISM, HiRISE, and CTX data that resulted in extensive base mapping, age dating, detailed spectro-morphological mapping of a focused region at LM, spectral analyses of various mineral outcrops, and 3D topographic analyses using combinations of HRSC DTMs and CRISM data. We observed a diversity of mineral assemblages, suggesting that the nature of aqueous alteration at LM varied in space and time. This mineralogy, together with geologic features, indicates a transition from Noachian impact-induced hydrothermal alteration through Hesperian evaporative processes to Amazonian resurfacing. More recently, we extended our investigations southward to include wide areas of Tyrrhena Terra (TT) toward the rim of the Hellas Basin. The entire TT region hosts a fascinating diversity of aqueously altered materials accompanied by unaltered mafic rocks. It is cut by fluvial channels, is overprinted by numerous impact craters, and includes various lobate and fan-shaped deposits. Similar to LM, the combinations of these different landforms provide evidence of a variable history of erosion and deposition. Current work is defining the effects of aqueous processes and impacts on mineral alteration and weathering. Again, we began with extensive geomorphological mapping of the entire TT region and age dating of selected units based on HRSC and CTX data. This geomorphological map was then coordinated with a map of aqueous minerals derived from the analysis of CRISM multispectral imagery together with focused CRISM hyperspectral analyses at selected sites to assess whether or not there are spatial trends in the relationships between specific geomorphological units and mineral occurrences throughout TT. We found clear correlations between certain mineral types and their proximity to one of the major impact basins. In particular, the Hellas impact event appears to have produced more variable temperatures and water chemistries, leading to increased mineral variability near its rim.

elib-URL des Eintrags:https://elib.dlr.de/146118/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Tracing the aqueous alteration history between Isidis and Hellas Planitiae on Mars
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Tirsch, DanielaDaniela.Tirsch (at) dlr.dehttps://orcid.org/0000-0001-5905-5426NICHT SPEZIFIZIERT
Bishop, J. L.SETI Institute, Carl-Sagan-Centerhttps://orcid.org/0000-0002-6681-9954NICHT SPEZIFIZIERT
Voigt, Joana R.C.Lunar and Planetary Laboratory, University of Arizona, AZ, USAhttps://orcid.org/0000-0002-4834-2021NICHT SPEZIFIZIERT
Tornabene, Livio L.University of Western Ontario, London, ON, CanadaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Viviano, C.Johns Hopkins University Applied Physics Lab (JHUAPL)NICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Lane, M.D.Fibernetics LLCNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Loizeau, DamienInstitut d’Astrophysique Spatiale, Universite Paris-Sud, Orsay, FranceNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Sacks, L.Dept. of Earth Sciences, Institute for Earth and Space Exploration, University of Western Ontario,NICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2021
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:53
DOI:10.1130/abs/2021AM-365395
Seitenbereich:Seite 365395
Verlag:The Geological Society of America (GSA)
Name der Reihe:Geological Society of America Abstracts with Programs
Status:veröffentlicht
Stichwörter:Mars, spectroscopy, geologic mapping, HRSC, CRISM
Veranstaltungstitel:GSA Connects 2021
Veranstaltungsort:hybrid; Portland, Oregon, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:10 Oktober 2021
Veranstaltungsende:13 Oktober 2021
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erforschung des Weltraums
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):R - Projekt Mars Express HRSC (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetengeologie
Hinterlegt von: Tirsch, Daniela
Hinterlegt am:24 Nov 2021 13:12
Letzte Änderung:24 Apr 2024 20:45

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