Results 61 to 70 of about 13,826 (203)

Geochemical evolution of the Nyiragongo volcano (Virunga, Western African Rift, Zaire) [PDF]

Bulletin of the Geological Society of Finland, 1985
Strongly undersaturated foiditic lavas (nepheline—melilitites, nephelinites, leucitites) from the active Nyiragongo volcano have been analysed for trace elements (Sc, V, Cr, Co, Ba, REE, Hf, Ta, Th and U) by instrumental neutron activation analysis.
J. Hertogen, L. Vanlerberghe, M.R. Namegabe   +2 more
doaj   +1 more source

An Open Database of Lunar Regolith and Simulants Properties

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Lunar regolith, the layer of unconsolidated material covering the Moon's surface, is central to the science and technology developed for the Moon, notably related to in‐situ science investigations, resource utilization, surface infrastructure, and mobility systems.
Léonie Gasteiner, Naomi Murdoch, Olfa D'Angelo   +2 more
wiley   +1 more source

Particle‐Scale Mechanics of a Regolith‐Type Soil

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT The existing studies have reported that the surface of Mars shows the presence of materials having igneous origin, including basalt and regolith‐type coarse soils. These findings are affected by significant uncertainties and, therefore, the selection of simulants for various exploration applications, including surface mobility of rovers ...
Vincenzo Nardelli, Chencheng Wang, Matthew Richard Coop   +2 more
wiley   +1 more source

(Table 5) Representative analyes of sodic pyroxene and relict pyroxene of ODP Hole 125-778A

, 1992
Calculation based on O = 6. Fe2+ and Fe3+ of sodic pyroxene were calculated according to formula constraints.
Ogawa, Yujiro, Shozui, Masaya, Ishii, Teruaki, Masaya Shozui (6966365), Hirokazu Maekawa (6966362), Saboda, Kristine L, Teruaki Ishii (6963374), Yujiro Ogawa (6961280), Maekawa, Hirokazu, Kristine L Saboda (6966368)   +9 more
core   +1 more source

Near‐infrared Spectra of Lunar Ferrous Mineral Mixtures

Earth and Space Science, 2021
Iron‐bearing minerals are a major component of materials on the lunar surface, and many of them can be distinguished based on the diagnostic absorption features in visible and near‐infrared reflectance spectra.
Xunyu Zhang, Edward Cloutis
doaj   +1 more source

A Newly Discovered Tablet‐Making Facility in Nineveh: Insights From Scientific Analysis

Archaeometry, EarlyView.
ABSTRACT This paper addresses the question of tablet technology in the Neo‐Assyrian capital city of Nineveh. Recent excavations in the lower town of Nineveh by the Iraqi–Italian Archaeological Expedition uncovered an exceptional assemblage of more than 200 tablets from an elite residence that appears to have included a scriptorium.
Mathilde Jean, Michela Spataro, Jonathan Taylor, Gianfranco Ulian, Giovanni Valdré, Gabriele Giacosa, Eleonora Mariani, Nicolò Marchetti   +7 more
wiley   +1 more source

The Geology and Lamongan Volcanic Rocks Case Study at Ranu Pakis, Klakah, Lumajang, East Java Province, Indonesia

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2019
Lamongan volcano is one of the unique volcanoes in the Sunda Volcano. This volcano has side eruption centers or on the slopes of the volcano. The morphology of parasitic eruptions in this volcanoes complex includes maars and boccas.
Dwi Fitri Yudiantoro, Ramonada Taruna Perwira, Muchamad Ocky Bayu Nugroho   +2 more
doaj   +1 more source

Learning Across the Divide: Understanding Knowledge Sharing Through Petrographic Analysis on Ceramics From the Rhine‐Meuse Delta During the Middle to Late Neolithic Transition (3400–2200 bce)

Archaeometry, EarlyView.
ABSTRACT Vlaardingen (VL) communities on the Dutch West coast (3400–2200 bce) are part of a unique, long‐term continuity in the European Neolithic. Despite large‐scale changes in European populations during the Neolithic, the genomic diversity and cultural practices of VL communities can be retraced to the Mesolithic.
Jisca de Bruin, Erik Kroon, Lasse van den Dikkenberg, Dennis Braekmans   +3 more
wiley   +1 more source

Petrology and geochemistry of Granitoids at Khanchay-Aliabad region, Tarom sub-zone, East of Zanjan [PDF]

پترولوژی, 2018
Khanchay-Aliabad area as a part of Tarom magmatic belt contains some shallow depth intrusions which are intruded the Eocene volcanic- sedimentary rocks and have very close association with Cu mineralization. The Eocene volcanic- sedimentary rocks include
Arefeh Saiedi, Mir Ali Asghar Mokhtari, Hossein Kouhestani   +2 more
doaj   +1 more source

Technologies of Transition: Pottery Production and Specialization in Early Rome and Its Neighbors. Neutron Activation Analysis of Regional Assemblages and a Mineralogical‐Petrographic Study of Impasto Chiaro‐Sabbioso

Archaeometry, EarlyView.
ABSTRACT The following paper investigates ceramic production and signs of specialization in Rome and the wider region during the early first millennium bce, through an archaeometric approach using Instrumental Neutron Activation Analysis (NAA), and complementary techniques.
Mattia D'Acri, Maria Verde, Alberto De Bonis, Vincenzo Morra, Brandi L. MacDonald   +4 more
wiley   +1 more source