Results 71 to 80 of about 14,109 (220)

Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers

Scientific Reports, 2021
In recent years, cryoconite has received growing attention from a radioecological point of view, since several studies have shown that this material is extremely efficient in accumulating natural and anthropogenic radionuclides.
Alexey Miroshnikov, Mikhail Flint, Enver Asadulin, Ramiz Aliev, Andrei Shiryaev, Arsenii Kudikov, Vladimir Khvostikov   +6 more
doaj   +1 more source

Materials Characterization and Technological Aspects of Hellenistic Grey Ware Lamps From Nysa‐Scythopolis (Israel): Evidence Suggesting Local Production?

Archaeometry, EarlyView.
ABSTRACT Grey ware lamp fragments and a production waster from Tell Iẓṭabba (Israel) were analyzed to determine their manufacturing technology and provenance. These were compared with a light brown‐orange reference fabric from the same site.
Dana Ashkenazi, Anat Cohen‐Weinberger, Achim Lichtenberger, Oren Tal   +3 more
wiley   +1 more source

Petrography class expedition on the Gunpowder River [PDF]

, 1923
Caption: Expedition on the Gunpowder River, near Baltimore, taken by the Class in Petrography, headed by Dr. Mathews.

core  

Interpretation of Lineaments Within the Western Part of the Baikal-Patom Belt Using a Multiscale Tectonophysical Approach in the Context of Ore-Forming Systems Prediction

Georesursy
In the article, using the territory of the western part of the Baikal-Patom belt as an example, an author’s approach to the automatic extraction of lineaments reflecting various scale levels of the development of the fault network framework is proposed ...
S. A. Ustinov, V. A. Petrov, A. A. Andreev, A. D. Svecherevsky, I. A. Kochkin, V. V. Shukhov   +5 more
doaj   +1 more source

Subduction Initiation and Early Subduction Zone Development: Insights From the P–T–t Path of the Bay of Islands Metamorphic Sole

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy, Carl Guilmette, Mark Coleman, Kyle Larson, Douglas K. Tinkham, Alana M. Hinchey, John Wakabayashi, Jean H. Bédard, Louise Mérit, Philippe Agard, Loïc Labrousse, Antoine Godet   +11 more
wiley   +1 more source

Rb2Lu[Si4O10]F, a tubular chain silicate

Acta Crystallographica Section E, 2014
Single crystals of Rb2Lu[Si4O10]F (dirubidium lutetium tetrasilicate fluoride) were obtained in flux-synthesis experiments in the system SiO2–Lu2O3–RbF. The compound belongs to the group of tubular chain silicates, i.e.
Volker Kahlenberg, Tanja Manninger
doaj   +1 more source

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

Journal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi, Alan P. Heward, Lorraine B. Eglinton, Steve R. Packer, Darrin T. Stead   +4 more
wiley   +1 more source

(Table 1) Petrography of Fe-Ti oxide gabbros from ODP Hole 118-735B [PDF]

, 1991
(Table 1) Petrography of Fe-Ti oxide gabbros from ODP Hole 118 ...
Peter S Meyer (6963035), Sherman H Bloomer (6963038), Meyer, Peter S, Ozawa, Kazuhito, Bloomer, Sherman H, Kazuhito Ozawa (6973538)   +5 more
core   +1 more source

The Role of Placer Deposits in Ensuring the Reproduction of the Mineral Resource Base of Scarce Types of Strategic Mineral Raw Materials in Russia at the Present Stage

Russian Journal of Earth Sciences
Placer deposits had (and for a number of components still have) an important role in providing strategic types of mineral resource base for both Russia and the world as a whole.
Bortnikov N. S., Volkov A. V., Lalomov A. V., Bochneva A. A., Ivanova Yu. N., Lalomov D. A.   +5 more
doaj   +1 more source

Thermal histories of El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155): Implications for the diversity of IAB‐ungrouped iron meteorites and their parent bodies

Meteoritics &Planetary Science, EarlyView.
Abstract This study provides the first petrographic, crystallographic, and chemical comparison between El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155), two particular IAB‐ungrouped iron meteorites. Both contain exceptionally large graphite nodules and “flowers”, providing unique insights into carbon behavior in metallic melts and cooling ...
L. Perez, M. Roskosz, F. Danoix, L. Kern, V. Megevand, C. Brillatz, B. Devouard, J. Gattacceca, M. Gounelle   +8 more
wiley   +1 more source