Results 31 to 40 of about 9,240 (133)

Mineral reconnaissance at the Highland boundary with special reference to the Loch Lomond and Aberfoyle areas [PDF]

, 1983
Serpentinite bodies at the Highland Boundary in the Loch Lomond and Aberfoyle areas are extensively altered to magnesite-quartz and ferroan-dolomite-quartz rocks. Silicification was probably initiated before conversion to carbonate.
Fortey, N.J., Grout, A., Henderson, W.G., Johnson, C.E.   +3 more
core  

The Spitzer Spectroscopic Survey of S-type Stars [PDF]

, 2012
S-type AGB stars are thought to be in the transitional phase between M-type and C-type AGB stars. Because of their peculiar chemical composition, one may expect a strong influence of the stellar C/O ratio on the molecular chemistry and the mineralogy of ...
A. A. Zijlstra, Acke, Allamandola, Andersen, B. Acke, Begemann, Begemann, Blommaert, Brown, Cami, Cardelli, Carpenter, Cau, Chan, Cherchneff, Cherchneff, Chiar, D. Barry, D. Ladjal, DePew, Dijkstra, Drimmel, F. van Wyk, Fabian, Ferrarotti, Ferrarotti, G. C. Sloan, Gielen, Goebel, Groenewegen, Grossman, Guandalini, Gustafsson, H. Van Winckel, Henning, Heras, Herwig, Higdon, Hoefner, Hony, Hony, Höfner, Höfner, Iben, J. A. D. L. Blommaert, J. Cami, J. Menzies, J. Th. van Loon, Jaeger, Jura, Justtanont, K. Exter, K. Smolders, Keller, L. Decin, Lagadec, Lebzelter, Leisenring, Lorenz-Martins, M. A. T. Groenewegen, M. Desmet, M. Feast, M. Matsuura, Marshall, Martin, McCabe, McDonald, Mutschke, Mutschke, N. Cox, Onaka, P. de Cat, P. Degroote, P. Neyskens, Peeters, Pendleton, Piccirillo, Pitman, Pojmanski, Pojmański, Posch, Posch, R. Sahai, R. Østensen, Raskin, S. Bloemen, S. Hony, S. Saesen, S. Uttenthaler, S. Van Eck, Schutte, Sloan, Sloan, Sloan, Sloan, Sloan, Smith, Smolders, Stencel, T. Verhoelst, Tielens, Treffers, Uttenthaler, Van Eck, Van Eck, van Loon, Vardya, Volk, W. Zima, Woitke, Woźniak, Zechmeister, Zhukovska, Zijlstra   +113 more
core   +3 more sources

Properties of Protostars in the Elephant Trunk in the Globule IC 1396A [PDF]

, 2009
Extremely red objects, identified in the early Spitzer Space Telescope observations of the bright-rimmed globule IC 1396A and photometrically classified as Class I protostars and Class II T Tauri stars based on their mid-infrared (mid-IR) colors, were ...
Boogert, Adwin, Cambrésy, Laurent, Faied, Dohy, Jarrett, Thomas H., Morris, Patrick, Palla, Francesco, Reach, William T., Rho, Jeonghee, Tappe, Achim, Valdettaro, Riccardo   +9 more
core  

Thermal Segregation and Reddening in Europa's Double Ridges

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Europa's double ridges often display lower albedo and redder color than their surroundings. Their unique topography may cause sublimation‐driven darkening due to illumination and self‐heating—the process of thermal segregation. We apply an advanced 3D thermophysical model, including shadowing and self‐heating through mutual exchange of ...
Kya C. Sorli, Paul O. Hayne, Lucas Lange, Sylvain Piqueux   +3 more
wiley   +1 more source

Optical Mineralogy [PDF]

, 1997
This resource is a 43 page pdf document on the principals of optical mineralogy. Topics include light, the polarizing light microscope, the refractive index, optical classes and indicatrix theory, the relationship of optical properties to crystal ...
Mickey Gunter
core  

High Temperature Friction and Strength of Felsite and Basalt: Implications for Supercritical EGS at Krafla, Iceland

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract One promising potential site for extracting supercritical geothermal fluids is the Krafla volcano, Iceland, into which a borehole was drilled very close to a shallow rhyolite magma chamber at about 2 km depth. Besides the technical challenge to drill in this setting, the extreme temperature conditions of T > 900°C close to the magma body may ...
E. Rybacki, V. Schuster, J. Starke, S. Incel   +3 more
wiley   +1 more source

Olivine Microstructure Constraints on Ureilite Parent Body Deformation

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Ureilites are ultramafic achondrites for which the parent body is unknown. Monomict ureilites, consisting primarily of olivine and pyroxene, are thought to represent mantle residues, carrying essential information for their parent body deformation history.
Yaozhu Li, Phil J. A. McCausland, Roberta L. Flemming, Callum J. Hetherington, Bo. Zhao   +4 more
wiley   +1 more source

Transient dust in warm debris disks - Detection of Fe-rich olivine grains

, 2012
(Abridged) Debris disks trace remnant reservoirs of leftover planetesimals in planetary systems. A handful of "warm" debris disks have been discovered in the last years, where emission in excess starts in the mid-infrared.
A. Juhász, A. Moór, A. Tamanai, Aumann, Begemann, Beichman, Beichman, Bouwman, Bouwman, Bradley, Brunetto, Bryden, Burns, Carpenter, Charbonneau, Chen, Chen, Chen, Davison, Dohnanyi, Dorschner, Egan, Fabian, Fujiwara, Furlan, Gail, Gorlova, H. Mutschke, Henning, Henning, Henning, J. Olofsson, Juhasz, Juhász, Jäger, Jäger, Jäger, Keil, Kemper, Kitamura, Koerner, Koike, Koike, Krivov, Lebreton, Liseau, Lisse, Lisse, Lisse, Lisse, Lovis, Low, Löhne, Matranga, Melis, Min, Min, Moskovitz, Moór, Murata, Mutschke, Nakamura, Naylor, Nguyen, Nuth, Oliveira, Olofsson, Olofsson, Ossenkopf, P. Ábrahám, Prato, Qin, Sargent, Sargent, Scherstén, Smith, Smith, Soderblom, Sogawa, Sprague, Tamanai, Tamanai, Th. Henning, Thompson, Verrier, Voshchinnikov, Weinberger, Weinberger, Wogelius, Wolf, Wooden, Wooden, Wooden, Wyatt, Wyatt, Zeidler, Zolensky, Zolensky, Zuckerman, Ábrahám   +99 more
core   +1 more source

Shadows, gaps, and ring-like structures in protoplanetary disks [PDF]

, 2011
We study the structure of passively heated disks around T Tauri and Herbig Ae stars, and present a vectorized Monte Carlo dust radiative transfer model of protoplanetary disks. The vectorization provides a speed up factor of 100 when compared to a scalar
Acke, Alexander, Alexander, Asplund, Beckwith, Bertout, Bjorkman, Bouwman, Brown, Brown, Calvet, Charnoz, Chiang, Cieza, Draine, Draine, Dullemond, Dullemond, Dullemond, Dullemond, Dullemond, Dullemond, D’Alessio, Edgar, Eisner, Espaillat, F. Heymann, Fitzpatrick, Fleck, Fukagawa, Furlan, Furlan, Gail, Hayashi, Huelamo, Ida, Isella, Ivezic, Kalas, Kama, Kemper, Kenyon, Kessler-Silacci, Klahr, Krijt, Krügel, Lagrange, Lommen, Lommen, Lubow, Lucy, Malfait, Mayama, McCaughrean, Millan-Gabet, Min, Min, Miroshnichenko, Mizuno, Mulders, Muzerolle, Najita, Najita, Natta, Natta, Nomura, Oliveira, Olofsson, Ozernoy, Pascucci, Pinte, Pinte, Pinte, Pontoppidan, Pontoppidan, R. Siebenmorgen, Ratzka, Ricci, Robitaille, Robitaille, Schegerer, Schegerer, Schisano, Siebenmorgen, Siebenmorgen, Sterzik, Strom, Testi, Thalmann, Tielens, Tutukov, van Boekel, van den Ancker, Verhoeff, Vinkovic, Visser, Voshchinikov, Walker, Waters, Watson, Watson, Whitney, Witt, Wolf, Zubko   +104 more
core   +2 more sources

Glass bead games: enumeration of possible polytypes based on two stacking vectors and applications to the iron‐ore sinter phases SFCA and SFCA‐I

Acta Crystallographica Section A, Volume 82, Issue 3, Page 145-162, May 2026.
General formulas are presented that allow for the enumeration of polytypes based on translationally equivalent layers and two equivalent arrangements of adjacent layers involving distinct possible stacking vectors, t1 and t2. The results have been applied to the polytypism among two different polysomes of the family of so‐called silico‐ferrites of ...
Michael Francesco Salzmann, Volker Kahlenberg, Hannes Krüger, Tim Netzer   +3 more
wiley   +1 more source