Results 51 to 60 of about 1,175 (180)

Volcanic caves of East Africa - an overview [PDF]

International Journal of Speleology, 1998
Numerous Tertiary to recent volcanoes are located in East Africa. Thus, much of the region is made up volcanic rock, which hosts the largest and greatest variety of East Africas caves.
Jim W. Simons
doaj  

Vulcanospeleology in Saudi Arabia

Acta Carsologica, 2006
Saudi Arabia has over 80,000 km2 of lava fields, locally known as harrats. However, only a few studies of lava caves in Saudi Arabia have been published internationally.
John J. Pint
doaj   +1 more source

Shortwave Infrared Microimaging Spectroscopy of the Martian Meteorites

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Until samples from the Martian surface are successfully brought to Earth, meteorites represent the only opportunity to perform laboratory analyses on Martian material. Microimaging spectroscopy of the Martian meteorite suite provides a valuable means to better understand infrared data collected remotely from the Martian surface. This rapid and
J. K. Miura, B. L. Ehlmann, R. Greenberger, E. Cutts   +3 more
wiley   +1 more source

Multidisciplinary Analyses of Terrestrial Samples Used to Interpret an Inorganic Origin (Anhydrite:Ce3+) for the 304 and 325‐nm Doublet Fluorescence Detected by the Mars 2020 SHERLOC Instrument at Jezero Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Doublet fluorescence at 304 and 325‐nm under deep ultraviolet (DUV) excitation was detected on Mars at Jezero crater by the Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) instrument onboard the Mars 2020 rover Perseverance.
N. C. Haney, R. V. Morris, R. S. Jakubek, J. V. Clark, J. I. Simon, W. P. Buckley, R. T. Downs, E. B. Rampe, R. M. G. Armytage, T. G. Graff, A. S. Burton, F. M. McCubbin, E. L. Berger, V. M. Tu, P. D. Casbeer, S. A. Mertzman, K. H. Williford, E. L. Scheller, T. Fornaro, S. Siljeström, A. Steele, K. P. Hand, T. J. Lapen   +22 more
wiley   +1 more source

Feasibility study of a cold gas-propelled autonomous surveying vehicle for lunar environments

Frontiers in Space Technologies
With impending plans for establishing the first long-term lunar base camp, there is a need to find sustainable habitation sites on the Moon. Discovered in 2009, lunar lava tubes have shown potential for base sites and have been proposed for devoted ...
Nikita Jagdish, Brian C. Gunter
doaj   +1 more source

The 2017 Nishinoshima eruption: combined analysis using Himawari-8 and multiple high-resolution satellite images

Earth, Planets and Space, 2019
Nishinoshima volcano suddenly resumed eruptive activity in April 2017 after about 1.5 years of dormancy since its previous activity in 2013–2015. Nishinoshima is an uninhabited isolated island.
Takayuki Kaneko, Fukashi Maeno, Atsushi Yasuda, Minoru Takeo, Kenji Takasaki   +4 more
doaj   +1 more source

Exploring Terrestrial Lava Tubes as Martian Analogs (I): Multi‐Analytical Study of Mineralization Processes in Cueva del Vidrio, La Palma (Canary Islands)

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract The study of terrestrial lava tubes is essential for understanding geological processes occurring during volcanic activity on other planetary bodies, such as Mars. These processes lead to the formation of minerals analogous to those found on other planets.
F. Alberquilla, J. Aramendia, L. Coloma, I. Martínez‐Arkarazo, G. Arana, A. Gonzalez, R. Gisbert, E. Díaz, P. Cobiella, M. Perestelo, J. M. Madariaga   +10 more
wiley   +1 more source

Substitution of Fe3+ into anorthite in oxidized, Al‐deficient ferrobasaltic systems with implications for the petrogenesis of angrite meteorites

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 427-443, March 2026.
Abstract Angrite meteorites are critically silica‐undersaturated igneous rocks with high Ca/Al and Fe/Mg, along with depletion in volatile lithophile elements Na and K such that they crystallize anorthite along with olivine and calcic pyroxene. The anorthite in angrites contains substantial Fe, and in NWA 1670 and NWA 1296, it is present at major ...
Seann J. McKibbin, Dominique Tanner, Hugh St. C. O'Neill   +2 more
wiley   +1 more source

Decoding organic compounds in lava tube sulfates to understand potential biomarkers in the Martian subsurface

Communications Earth & Environment
Exploring molecular biomarkers in lava tube speleothems offers insights into environmental dynamics, biogeochemical processes, and subsurface life, with implications for astrobiology, particularly in Martian analog environments.
Vera Palma, José María De la Rosa, Bogdan Petroniu Onac, Francesco Sauro, Jesús Martínez-Frías, Ana Teresa Caldeira, José Antonio González-Pérez, Nicasio Tomás Jiménez-Morillo, Ana Zélia Miller   +8 more
doaj   +1 more source

Prospective Lava Tubes at Hellas Planitia

, 2020
16
Paris, Antonio, Davies, Evan, Tognetti, Laurence, Zahniser, Carly   +3 more
openaire   +2 more sources