Results 51 to 60 of about 116,871 (355)
Abundances of ordinary chondrites in thermally evolving planetesimals [PDF]
, 2018 Chondrites are one of the most primitive objects in the solar system, and keep the record of the degree of thermal metamorphism experienced in their parent bodies. This thermal history can be classified by the petrologic type. We investigate the thermal evolution of planetesimals to account for the current abundances (known as the fall statistics) of ...
arxiv +1 more source
The Significance of Multiple Saturation Points in the Context of Polybaric Near-fractional Melting [PDF]
, 2004 Experimental petrologists have successfully located basaltic liquid compositions parental to mid-ocean ridge basalt that are, within experimental resolution, multiply saturated with three-phase harzburgite or four-phase lherzolite assemblages on their ...
Asimow, Paul D., Longhi, John
core +2 more sources
Particle saltation trajectories in supercritical open channel flows: Roughness effect
Earth Surface Processes and Landforms, Volume 47, Issue 15, Page 3588-3610, December 2022., 2022 This study investigates single particle trajectories in supercritical open channel flows under different hydraulic and roughness conditions. Therefore, it helps to get a better understanding on the mechanics and prediction of bedrock incision and hydro‐abrasion occurring in steep bedrock rivers and hydraulic structures.
Dila Demiral +3 more
wiley +1 more source
Thermal and Impact History of the H Chondrite Parent Asteroid during Metamorphism: Constraints from Metallic Fe-Ni [PDF]
, 2014 We have studied cloudy taenite, metallographic cooling rates, and shock effects in 30 H3-6 chondrites to elucidate the thermal and early impact history of the H chondrite parent body. We focused on H chondrites with Ar-Ar ages greater than 4.4 Gyr and unshocked and mildly shocked H chondrites, as strongly shocked chondrites with such old ages are very ...
arxiv +1 more source
Геодинамика и тектонофизика, 2015 Chronicle of All-Russian conference “Fluid regime of endogenic processes of continental lithosphere” devoted to 50 anniversary of Laboratory of petrology, geochemistry and ore genesis of the Institute of the Earth’s crust is presented.
F. A. Letnikov +3 more
doaj +1 more source
Earth Surface Processes and Landforms, Volume 47, Issue 15, Page 3611-3628, December 2022., 2022 The loess provenance areas of the Ebro and Móra basins are mainly the fluvial terraces of the Middle and Lower Ebro River, respectively, according to the analyses of very heavy minerals and particle size. The wind transport distances are relatively short (<100 km).
José M. Plata +7 more
wiley +1 more source
Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о ЗемлеNumeric regional models are necessary to reconstruct the nature and conditions of formation of i geological structures, to obtain ideas about the evolution of different zones of the crust and upper mantle, the evolution of fold and fault dislocations and
S.L. Shevyrev, N.G. Boriskina
doaj +1 more source
Rifting and Mafic Magmatism in the Hebridean Basins [PDF]
, 2015 Acknowledgements and Funding Research in the BPIP was supported by NERC grant GR9/1581, and the Carnegie Trust for the Universities of Scotland. H. Rollinson and E.
Hole, M. J. +3 more
core +1 more source
Photogrammetric documentation in tunneling
Civil Engineering Design, EarlyView.Abstract Photogrammetric surveys for geological excavation documentation are standard practice in tunnel construction, benefiting from the sector's ongoing digitalization. However, the application of photogrammetry often remains confined to geological assessments. By creating comprehensive 3D models of excavated tunnels, it is also possible to evaluate
Andreas Zani +2 more
wiley +1 more source
Earth Surface Processes and Landforms, Volume 48, Issue 1, Page 215-229, January 2023., 2023 This paper uses a numerical landscape evolution model to reconstruct the topographic history of Madagascar since the Late Cretaceous. The model is optimised by balancing the volumes of onshore erosion and offshore sedimentation; the former is predicted with erosion laws and based on uplift history inferred from elevated planation surfaces.
Ruohong Jiao +4 more
wiley +1 more source