Results 41 to 50 of about 50,958 (220)

Determining impact angle from the spatial distribution of shock metamorphism: A case study of the Gosses Bluff (Tnorala) impact structure, Australia

Meteoritics &Planetary Science, EarlyView.
Abstract The majority of planetary impacts occur at oblique angles. Impact structures on Earth are commonly eroded or buried, rendering the identification of the direction and angle of impact—using methods such as asymmetries in ejecta distribution, surface topographic expression, central uplift structure, and geophysical anomalies—challenging. In this
Eloise E. Matthews, Auriol S. P. Rae, Thomas Kenkmann, Nicholas E. Timms, Aaron J. Cavosie, Marian B. Holness   +5 more
wiley   +1 more source

High-energy X-ray radiography investigation on the ejecta physics of laser shock-loaded tin

AIP Advances, 2019
This study is devoted to the high-energy X-ray radiography investigation on the ejecta physics of laser shock-loaded tin. The ejecta were generated via laser shock loaded tin under sequential shock-breakout pressures by high-power nanosecond lasers.
Weihua He, Tao Xi, Min Shui, Minghai Yu, Yongqiang Zhao, Yuchi Wu, Yuqiu Gu, Genbai Chu, Jianting Xin   +8 more
doaj   +1 more source

Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers

, 2014
We present the first comprehensive study of r-process element nucleosynthesis in the ejecta of compact binary mergers (CBMs) and their relic black-hole (BH)-torus systems.
Bauswein, Andreas, Goriely, Stephane, Janka, H. -Thomas, Just, Oliver, Pulpillo, Ricard Ardevol   +4 more
core   +1 more source

Search for impact ejecta at the Paleocene–Eocene boundary

Meteoritics &Planetary Science, EarlyView.
Abstract Almost 10 years have passed since microtektites and microkrystites were reported for the Paleocene–Eocene (P–E) boundary in drill cores and outcrop in New Jersey and in ODP Hole 1051B in the western North Atlantic. The glassy spherules were interpreted to reflect an impact trigger for the Paleocene–Eocene Thermal Maximum (PETM).
Birger Schmitz, Yue Cai, Shiyong Liao, Victoriano Pujalte, Ting Ruan, Robert P. Speijer, Ellen Thomas   +6 more
wiley   +1 more source

A geophysical investigation of the Roter Kamm impact crater, Namibia

Meteoritics &Planetary Science, EarlyView.
Abstract The Roter Kamm impact crater is located in the southern Namib Desert. The crater has a diameter of 2.5 km and belongs to the category of simple, bowl‐shaped impact craters, with an elevated rim of fractured target rock. The crater's interior is completely buried beneath sediments, preventing extensive surface investigations of the bedrock ...
Hannah Nienhaus, Pritam Yogeshwar, Wiebke Mörbe, Bülent Tezkan, Yajun Liu, Bufelo Lushetile, Martin Melles   +6 more
wiley   +1 more source

Disentangling Impact Ejecta Dynamics Using Micro–X‐Ray Fluorescence (μ‐XRF): A Case Study From the Terrestrial Cretaceous‐Paleogene (K‐Pg) Boundary

Geochemistry, Geophysics, Geosystems
This study presents a non‐destructive geochemical and petrographic workflow to generate high‐resolution chemostratigraphic records across key stratigraphic intervals, exemplified by a terrestrial Cretaceous‐Paleogene (K‐Pg) boundary sequence preserved at
Pim Kaskes, Roald Tagle, Mariia Rey, Steven Goderis, Sophie Decrée, Jan Smit, Philippe Claeys   +6 more
doaj   +1 more source

Exchange of ejecta between Telesto and Calypso: Tadpoles, horseshoes, and passing orbits

, 2010
We have numerically integrated the orbits of ejecta from Telesto and Calypso, the two small Trojan companions of Saturn's major satellite Tethys. Ejecta were launched with speeds comparable to or exceeding their parent's escape velocity, consistent with ...
Alvarellos, Alvarellos, Alvarellos, Anthony R. Dobrovolskis, Arias, Bate, Danby, Dermott, Dermott, Dobrovolskis, Dobrovolskis, Dobrovolskis, Housen, Izidoro, Jack J. Lissauer, José Luis Alvarellos, Kempf, Kevin J. Zahnle, Lecacheux, Levison, Lissauer, Melosh, Melosh, Melosh, Melosh, Murray, Porco, Seidelmann, Shoemaker, Sinclair, Szebehely, Wisdom, Zahnle, Zahnle, Zahnle, Zahnle   +35 more
core   +1 more source

Static recrystallization of shocked calcite in Ries impact breccias

Meteoritics &Planetary Science, EarlyView.
Abstract Calcite is prone to chemical and microstructural modifications, especially after having been strained at high stresses and strain rates, as during hypervelocity impact events. These modifications include precipitation from pore fluid as well as replacement of strained volumes by recrystallization. In calcite aggregates of a metagranite breccia
Claudia A. Trepmann, Fabian Dellefant, Lina Seybold, Wolfgang W. Schmahl, Elena Sturm, Daniel Weidendorfer, Sandro Jahn, Iuliia V. Sleptsova, Stuart A. Gilder   +8 more
wiley   +1 more source

ALMA Observations of the DART Impact: Characterizing the Ejecta at Submillimeter Wavelengths

The Planetary Science Journal, 2023
We report observations of the Didymos–Dimorphos binary asteroid system using the Atacama Large Millimeter/submillimeter Array (ALMA) and the Atacama Compact Array (ACA) in support of the Double Asteroid Redirection Test mission.
Nathan X. Roth, Stefanie N. Milam, Anthony J. Remijan, Martin A. Cordiner, Michael W. Busch, Cristina A. Thomas, Andrew S. Rivkin, Arielle Moullet, Ted L. Roush, Mark A. Siebert, Jian-Yang Li, Eugene G. Fahnestock, Josep M. Trigo-Rodríguez, Cyrielle Opitom, Masatoshi Hirabayashi   +14 more
doaj   +1 more source

Microspherules Formed by Lightning Strikes

Meteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source