Results 111 to 120 of about 87,697 (345)

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source

A database of plagioclase crystal preferred orientations (CPO) and microstructures - implications for CPO origin, strength, symmetry and seismic anisotropy in gabbroic rocks

, 2013
. This study presents a unique database of 172 plagioclase Crystallographic Preferred Orientations (CPO) of variously deformed gabbroic rocks. The CPO characteristics as a function of the deformation regime (magmatic or crystal-plastic) are outlined and ...
T. Satsukawa, B. Ildefonse, D. Mainprice, L. Morales, K. Michibayashi, F. Barou   +5 more
semanticscholar   +1 more source

Graphite crystallinity and thermal record in Campo del Cielo IAB iron meteorite: A window into impact processing on a chondritic body

Meteoritics &Planetary Science, EarlyView.
Abstract The Campo del Cielo iron meteorite (IAB‐MG) provides a unique window into early solar system processes, particularly the formation and evolution of carbon phases in non‐magmatic iron meteorites. In this study, we conducted a systematic nanostructural investigation of three distinct graphite occurrences—cliftonite (type I), interstitial ...
Xiao Tian Deng, Hong Yi Chen, Yang Li, Jin Yu Zhang, Lan Fang Xie, Si Zhe Zhao, Zhuang Guo, Chen Li, Kai Rui Tai   +8 more
wiley   +1 more source

Structural Petrology of Plagioclase Peridotites in the West Othris Mountains (Greece): Melt Impregnation in Mantle Lithosphere [PDF]

, 2001
Arjan H. Dijkstra
openalex   +1 more source

Partial amorphization of experimentally shocked plagioclase: A spectroscopic study [PDF]

, 2020
Lidia Pittarello, J. Fritz, J. Roszjar, Christoph Lenz, Chutimun Chanmuang N., Christian Koeberl   +5 more
openalex   +1 more source

Rapid terrestrial weathering of the CI1 carbonaceous chondrite find Oued Chebeika 002

Meteoritics &Planetary Science, EarlyView.
Abstract Alteration of historic CI1 meteorite falls during their curation demonstrates the susceptibility of smectite‐rich carbonaceous chondrites to terrestrial exposure. The discovery of Oued Chebeika 002 in Morocco in June 2024 presents a unique opportunity to document the earliest stages of weathering of a CI1 find.
Martin R. Lee, Jasper Glazer
wiley   +1 more source

Growth and reworking of freshwater microbially‐mediated carbonates in wind‐stressed lake margins (Lago Sarmiento, Southern Patagonia)

Sedimentology, EarlyView.
ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada, Mauricio Calderón, Anelize Bahniuk, Carolina Henríquez, Tatiana Stepanenko, José Pérez‐Donoso, Nicolás Bruna, Larissa Santos, Guilherme Fedalto, Luis Mancini, Leonardo Fadel Cury   +10 more
wiley   +1 more source

Effect of Re-impacting Debris on the Solidification of the Lunar Magma Ocean

, 2018
Anorthosites that comprise the bulk of the lunar crust are believed to have formed during solidification of a Lunar Magma Ocean (LMO) in which these rocks would have floated to the surface.
Abe, Alibert, Andrews-Hanna, Asphaug, Bandermann, Barnes, Barr, Borg, Borg, Borg, Bottinga, Boyce, Boyce, Boyet, Breuer, Cameron, Canup, Canup, Chambers, Chen, Cox, Cuk, Cuk, Daly, Dohnanyi, Elkins-Tanton, Elkins-Tanton, Elkins-Tanton, Eppelbaum, Gaffney, Gast, Hartmann, Ida, Jackson, Jackson, Kato, Kaula, Kirk, Kokubo, Kokubo, Konrad, Leinhardt, Lin, Lin, Longhi, Longhi, Luhmann, Marcus, Mastrobuono-Battisti, Matson, Matsuyama, McCubbin, McLeod, Melosh, Merk, Meyer, Minear, Monteux, Nemchin, Neumann, Niemela, Nyquist, Nyquist, O'Hara, O'Neill, Ogawa, Pahlevan, Pepin, Philpotts, Piskorz, Pritchard, Rankenburg, Ransford, Rathbun, Repetto, Reufer, Riner, Rolf, Rufu, Ryder, Saal, Salmon, Senshu, Sharp, Shirley, Snyder, Solomon, Solomon, Solomon, Spera, Spicuzza, Squyres, Takeda, Tanaka, Taylor, Taylor, Taylor, Taylor, Tian, Touboul, Touboul, Touma, Touma, Turcotte, Vander Kaaden, Wakita, Walker, Walker, Warner, Warren, Warren, Wieczorek, Williams, Wolf, Wood, Wood, Wyatt, Yamamoto, Yamamoto, Zhang, Zhang   +120 more
core   +1 more source

Dating C/S Structures in Syntectonic Granites by In Situ Rb‐Sr Analyses on Muscovite

Terra Nova, EarlyView.
ABSTRACT The interplay of crystallisation, deformation and fluid–rock interactions makes deciphering geochronological information complex in syntectonic granites. In this study, we apply in situ Rb‐Sr analyses to selected samples from the Questembert Variscan syntectonic granite in Western France, which was emplaced along the South Armorican Shear Zone
Philippe Boulvais, Romain Tartèse
wiley   +1 more source

Subcritical Cracking Associated With Subgrain Rotation Recrystallisation in Quartz Inferred From Cathodoluminescence Study

Terra Nova, EarlyView.
ABSTRACT We employed cathodoluminescence (CL) to study deformed quartz phenocrysts from the Cretaceous granite porphyry in SW Japan and observed fracture‐like planar structures appearing as CL‐dark bands. These CL‐dark bands were aligned with low‐angle grain boundaries formed by subgrain rotation recrystallisation.
Takuro Yoshioka, Takamoto Okudaira, Hideo Takagi   +2 more
wiley   +1 more source