Results 121 to 130 of about 64,440 (194)

Confronting Episodic vs. Continuous Heat Sources in Long‐Lived Hot Orogens: Insights From Petrochronological Studies in the Nova Venecia Complex, Araçuaí Orogen (SE Brazil)

Journal of Metamorphic Geology, Volume 43, Issue 9, Page 863-890, December 2025.
ABSTRACT Orogenic belts that sustain elevated temperatures at intermediate crustal depths for tens of millions of years are known as hot orogens. The evolution of these hot orogens is largely influenced by thermal maturation, primarily driven by the distribution of heat‐producing elements (HPEs), such as K, Th and U in the overthickened crust.
Lucas R. Schiavetti, Vinicius T. Meira, Sean Mulcahy, Jeffrey D. Vervoort, Peter L. Baker, George L. Luvizotto, Ricardo I. F. Trindade   +6 more
wiley   +1 more source

A study of the morphology, composition and mineral associations of Fe-Ni sulphides in CM carbonaceous chondrites [PDF]

, 2004
A study of the compositional and textural variations between Fe-Ni sulphides in a suite of pristine to extensively aqueously altered CM chondrites, using SEM and EMP ...
Bullock, E. S., Gounelle, M., Grady, Monica, Russell, S. S.   +3 more
core  

Sedimentary record of submarine gravity‐flow events in the southern Ryukyu forearc during the last 200 000 years: Archive of mega‐earthquakes and tsunamis

Sedimentology, Volume 72, Issue 7, Page 2323-2360, December 2025.
ABSTRACT Despite high convergence velocity, the southern Ryukyu subduction has relatively low and sparse instrumental seismicity, in contrast with the Yaeyama Islands, hit by huge tsunamis over the last few thousand years. This study explores the potential of deep marine sediments to record past large earthquakes and tsunamis.
Nathalie Babonneau, Gueorgui Ratzov, Charlotte Guerin, Mira Richa, Serge Lallemand, Michel Condomines, Patrick Bachelery, Delphine Bosch, Shu‐Kun Hsu, Chih‐Chieh Su, Ryuichi Shinjo, Andrew Lin, Maria‐Angela Bassetti, Marie Revel, Antonio Cattaneo, the EAGER Scientific Team, M Aizawa, G. Ballas, J.‐H. Chang, Y.‐P. Chang, T.‐T. Chen, Y.‐H. Chen, P. Das, J.‐P. Degeai, J. Déverchère, O. De Raco, N. Gosset, M. Herlédan, S.‐L. Ho, H.‐H. Hsu, Y.‐S. Huang, M. Lanson, C. Letourneau, H.‐S. Lin, L.‐F. Lin, L.‐K. Lin, M. Longo, M. Mérindol, B. Mercier de Lépinay, E. Miramontes, P. Morena, K. Nayak, D. Oregioni, L. Patry, R. K. Pillutla, V. Rigalleau, L. San Pedro, P.‐J. Su, F. Volage, K.‐Y. Wei, B. Whilhelm, N.‐T. Yu, P.‐S. Yu   +52 more
wiley   +1 more source

The Polonnaruwa meteorite: oxygen isotope, crystalline and biological composition

, 2013
Results of X-Ray Diffraction (XRD) analysis, Triple Oxygen Isotope analysis and Scanning Electron Microscopic (SEM) studies are presented for stone fragments recovered from the North Central Province of Sri Lanka following a witnessed fireball event on ...
Gibson, Carl H., Hoover, Richard B., Miyake, Nori, Oldroyd, Andrew, Samaranayake, Anil, Wallis, Daryl H., Wallis, Jamie, Wallis, M. K., Wickramarathne, K., Wickramasinghe, N. C.   +9 more
core  

New Li Lidar Observations and Model Simulations: A Window to Anthropogenic Signatures

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract We present Li lidar observations in the mesopause region above Kühlungsborn, Germany (54°N, 12°E). The lithium layer is mainly formed by meteoric ablation. But lithium has a much higher relative abundance in space debris compared with meteoroids, making it a good indicator of anthropogenic influence in the upper mesosphere.
M. Gerding, R. Wing, W. Feng, J. M. C. Plane, G. Baumgarten   +4 more
wiley   +1 more source

Life on Earth can grow on extraterrestrial organic carbon

Scientific Reports
The universe is a vast store of organic abiotic carbon that could potentially drive heterotrophy on habitable planets. Meteorites are one of the transporters of this carbon to planetary surfaces.
Annemiek C. Waajen, Cassio Lima, Royston Goodacre, Charles S. Cockell   +3 more
doaj   +1 more source

Boulders on Bennu: Low Apparent Thermal Inertia Caused by Thermal Fatigue Fractures

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract Boulders covering the surfaces of asteroids Bennu and Ryugu have apparent thermal inertias substantially lower than their meteorite analogs. This has led to the inference that boulders on Bennu may be unlike any known meteorite. However, samples returned from Ryugu have a thermal inertia 3.5 times higher than the apparent thermal inertia ...
Catherine M. Elder
wiley   +1 more source

Recurrent planetesimal formation in an outer part of the early solar system

Scientific Reports
The formation of planets in our solar system encompassed various stages of accretion of planetesimals that formed in the protoplanetary disk within the first few million years at different distances to the sun.
Wladimir Neumann, Ning Ma, Audrey Bouvier, Mario Trieloff   +3 more
doaj   +1 more source

Evolution of carbonaceous chondrite parent bodies: Insights into cometary nuclei [PDF]

It is thought that cometary samples will comprise the most primitive materials that are able to be sampled. Although parent body alteration of such samples would not necessarily detract from scientists' interest in them, the possibility exists that ...
Mcsween, Harry Y., Jr.
core   +1 more source

Al-Mg systematics of hibonite-bearing Ca,Al-rich inclusions from Ningqiang [PDF]

, 2011
Hibonite-bearing Ca,Al-rich inclusions (CAIs) usually occur in CM and CH chondrites and possess petrographic and isotopic characteristics distinctive from other typical CAIs.
Guan, Yunbin, Hsu, Weibiao, Wang, Ying
core