Results 71 to 80 of about 17,955 (212)

Early Holocene jökulhlaup chronology and deglaciation dynamics in central Iceland

Boreas, Volume 55, Issue 2, Page 340-355, April 2026.
Glacial lake outburst floods (jökulhlaups) have occurred throughout the Quaternary in glaciated regions worldwide. Reconstructing flood chronology yields insight into deglaciation processes, environmental change and the role of extreme events in landscape evolution.
Greta H. Wells, Þorsteinn Sæmundsson, Edwin R. C. Baynes, Timothy Beach, Sheryl Luzzadder‐Beach   +4 more
wiley   +1 more source

Late‐Holocene evolution of a small Sub‐Arctic glacier, Gljúfurárjökull (Tröllaskagi, northern Iceland)

Boreas, Volume 55, Issue 2, Page 356-383, April 2026.
Gljúfurárjökull, located on the Tröllaskagi Peninsula in northern Iceland, is a small glacier approximately 3.8 km in length. This study analyses the glacier's evolution through a combination of methods including: (i) geomorphological mapping, (ii) Cosmic‐Ray Exposure (CRE) dating, (iii) lichenometry and (iv) palaeoglacier reconstruction (volume ...
Nuria Andrés, José M. Fernández‐Fernández, David Palacios, Irene Schimmelpfennig, Leopoldo G. Sancho, Skafti Brynjólfsson, Þorsteinn Sæmundsson, Wesley R. Farnsworth, Luis M. Tanarro, Mariano Brito, Javier Santos‐González, Rosa B. González‐Gutiérrez, ASTER Team (Georges Aumaître, Karim Keddadouche)   +13 more
wiley   +1 more source

The pre-atmospheric size of Martian meteorites [PDF]

, 2002
The pre-atmospheric size of martian meteorites was calculated based on 80Kr produced by epithermal secondary cosmic-ray produced neutrons of 30-300 eV energy.
Busemann, H., Eugster, O., Lorenzetti, S.   +2 more
core  

Model calculations for cosmogenic nuclides in meteorites and the lunar surface. 1. Long‐lived radionuclides

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 600-620, April 2026.
Abstract Production rates for the cosmogenic radionuclides 10Be, 14C, 26Al, 36Cl, 41Ca, 53Mn, and 60Fe in a large variety of meteorites, that is, ordinary chondrites (H, L, LL), carbonaceous chondrites, HED meteorites, ureilites, Martian meteorites, and iron meteorites and in the uppermost ~2 m of the lunar surface are modeled.
Ingo Leya
wiley   +1 more source

Low-sulfidation epithermal Au mineralization in the Tikmehdash 2 deposit (southeast of Bostan Abad): Constraints on geology, mineralization, geochemistry, and fluid inclusions

Journal of Economic Geology
Tikmehdash 2 gold (Au) deposit is part of the Miyaneh-Bostan Abad metallogenic subzone. Au mineralization occurs in Mn- and Au-bearing quartz veins hosted by Eocene and Miocene volcanic-sedimentary sequences.
Hamid Hashempour, Hossein Kouhestani , Mir Ali Asghar Mokhtari, Ghafour Alavi   +3 more
doaj   +1 more source

Giant Porphyry Copper Deposits Caused by a Slab Jamming in the Mantle Transition Zone

Terra Nova, Volume 38, Issue 2, Page 106-115, April 2026.
ABSTRACT Two giant porphyry copper deposits in the Southern Central Andes formed during the Miocene–Pliocene transition when a bend in the subducting Juan de Fernández hotspot chain jammed in the mantle transition zone, causing mega‐scale slab‐kinking. This geometry implies mechanical resistance that caused East–West compression and eventually a thrust‐
Nipaporn Nakrong, Marnie Forster, Wim Spakman, Hielke Jelsma, Francois Gaboury, Gordon Lister   +5 more
wiley   +1 more source

Determination of neutron spectrum parameters at IREN facility using the MCNP simulation and experimental validation [PDF]

Nuclear Technology and Radiation Protection
The determination of the characteristics of neutron spectrum at different irradiation positions on the outer wall of moderator chamber of the intense resonance neutron source by simulation method using MCNP code was presented.
Nhat Le Tran Minh, Cong Vu Duc, Khiem Le Hong, Dinh Nguyen Thi, Thanh Pham Tien, Phi Truong Hoai Bao, Thai Nguyen Thi Xuan, Toan Tran Ngoc, Trung Dinh Van, Binh Nguyen Thanh, Son Nguyen An, Shetsov Valery Nikolaevich, Dmitriev Andrey Yuryevich, Lobachev Valerij Vladimirovich, Borzakov Sergey Borisovich   +14 more
doaj   +1 more source

Low‐Symmetry Weyl Semimetals: A Path to Ideal Topological States

Advanced Functional Materials, Volume 36, Issue 21, 12 March 2026.
This study presents a theoretical framework for realizing ideal Weyl semimetals, where Weyl nodes are well‐isolated at the Fermi level. The approach is exemplified in the low‐symmetry material Cu2SnSe3, which exhibits tunable topological phases, current‐induced orbital magnetization, and a strong circular photogalvanic effect, making it a promising ...
Darius‐Alexandru Deaconu, Varun Shah, Rodion Vladimirovich Belosludov, Mohammad Saeed Bahramy   +3 more
wiley   +1 more source

Mineralization and geochemical studies in the Kalchouyeh occurrence, southwest of Naein

Journal of Economic Geology, 2012
Kalchouyeh area in southwest of Naein is located in the Urumieh-Dokhtar volcano-plutonic belt. Mineralization occurred mainly as disseminations and veinlets hosted by trachy-andesite and pyroxene andesites. For mineralogy, alteration, fluid inclusion and
Hengameh Hosseini Dinani, Hashem Bagheri, Reza Shamsipour Dehkordi   +2 more
doaj  

Experimental study of the influence of borehole parameters on prompt fission neutron uranium logging and its corrections

Nuclear Engineering and Technology
In prompt fission neutron uranium logging, borehole environmental parameters affect the measured results and must be corrected. In order to explore the influence of borehole parameters on the interpretation of logging results, this paper builds a ...
Pengfei Zhou, Bin Tang
doaj   +1 more source