Small Lava Caves as Possible Exploratory Targets on Mars: Analogies Drawn from UAV Imaging of an Icelandic Lava Field

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Sam, LydiaLuleå tekniska universitet,Rymdteknik,School of Geosciences, University of Aberdeen, Meston Building, King’s College, Aberdeen, UK. National Space Science and Technology Center, United Arab Emirates University, Al Ain, Abu Dhabi, UAE (författare)

Small Lava Caves as Possible Exploratory Targets on Mars : Analogies Drawn from UAV Imaging of an Icelandic Lava Field

Artikel/kapitelEngelska2020

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2020-06-19
MDPI,2020
printrdacarrier

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LIBRIS-ID:oai:DiVA.org:ltu-80188
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80188URI
https://doi.org/10.3390/rs12121970DOI

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Språk:engelska
Sammanfattning på:engelska

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Ämneskategori:ref swepub-contenttype
Ämneskategori:art swepub-publicationtype

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Validerad;2020;Nivå 2;2020-07-07 (johcin)
Volcanic-aeolian interactions and processes have played a vital role in landscape evolution on Mars. Martian lava fields and associated caves have extensive geomorphological, astrobiological, and in-situ resource utilization (ISRU) implications for future Mars missions which might be focused on subsurface exploration. Although several possible cave “skylights” of tens to >100 m diameter have been spotted in lava fields of Mars, there is a possibility of prevalence of meter-scale features which are an order of magnitude smaller and difficult to identify but could have vital significance from the scientific and future exploration perspectives. The Icelandic volcanic-aeolian environment and fissure volcanoes can serve as analogs to study lava flow-related small caves such as surface tubes, inflationary caves, liftup caves, and conduits. In the present work, we have tried to explore the usability of unmanned aerial vehicle (UAV)-derived images for characterizing a solidified lava flow and designing a sequential methodology to identify small caves in the lava flow. In the mapped area of ~0.33 km2, we were able to identify 81 small cave openings, five lava flow morphologies, and five small cave types using 2 cm/pixel high-resolution images. The results display the usefulness of UAV imaging for such analogous research, and also highlight the possibility of the widespread presence of similar small cave openings in Martian lava fields. Such small openings can facilitate optimal air circulation within the caves while sheltering the insides from physical weathering and harmful radiations. Using the available best resolution remote sensing images, we extend the analogy through the contextual and geomorphological analysis of several possible pit craters in the Tharsis region of Mars, in a region of extremely vesicular and fragile lava crust with pahoehoe-type morphology. We report two possible pit craters in this region, with diameters as small as ~20 m. The possibility that such small cave openings can lead to vast subterranean hollow spaces on Mars cannot be ruled out considering its low gravity.

Ämnesord och genrebeteckningar

TEKNIK OCH TEKNOLOGIER Maskinteknik Rymd- och flygteknik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Aerospace Engineering hsv//eng
lava field
Iceland
caves
Mars
UAV
high-resolution imaging
geomorphology
Atmosfärsvetenskap
Atmospheric science

Biuppslag (personer, institutioner, konferenser, titlar ...)

Bhardwaj, AnshumanLuleå tekniska universitet,Rymdteknik,School of Geosciences, University of Aberdeen, Meston Building, King’s College, Aberdeen, UK. National Space Science and Technology Center, United Arab Emirates University, Al Ain, Abu Dhabi, UAE(Swepub:ltu)ansbha (författare)
Singh, ShaktimanLuleå tekniska universitet,Rymdteknik,School of Geosciences, University of Aberdeen, Meston Building, King’s College, Aberdeen, UK(Swepub:ltu)shasin (författare)
Martin-Torres, JavierLuleå tekniska universitet,Rymdteknik,School of Geosciences, University of Aberdeen, Meston Building, King’s College, Aberdeen, UK. Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), Armilla, Granada, Spain(Swepub:ltu)javmar (författare)
Zorzano Mier, María-PazLuleå tekniska universitet,Rymdteknik,Centro de Astrobiología (INTA-CSIC), Torrejón de Ardoz, Madrid, Spain(Swepub:ltu)marzor (författare)
Ramírez Luque, Juan AntonioLuleå tekniska universitet,Rymdteknik(Swepub:ltu)juajua (författare)
Luleå tekniska universitetRymdteknik (creator_code:org_t)

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Ingår i:Remote Sensing: MDPI12:122072-4292

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Av författaren/redakt...: Sam, Lydia; Bhardwaj, Anshum ...; Singh, Shaktiman; Martin-Torres, J ...; Zorzano Mier, Ma ...; Ramírez Luque, J ...

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