Results 51 to 60 of about 29,646 (330)

The lithospheric mantle and lower crust-mantle relationships under Scotland: a xenolithic perspective [PDF]

, 2011
In the British Isles the majority of volcanic rocks containing upper mantle and lower crustal xenoliths occur in Scotland. Most of the occurrences are of Carboniferous–Permian age.
Arai, B.G.J. Upton, Bonadiman, C. Bonadiman, Greenbaum, Griffin, H. Downes, Irving, Johnson, Kirstein, L.A. Kirstein, Larsen, Macdonald, McDonough, Menzies, P.G. Hill, Singh, T. Ntaflos   +17 more
core   +1 more source

Deciphering depositional controls and evolution of a lacustrine supradetachment basin through facies analysis: Gördes Basin, Western Türkiye

The Depositional Record, EarlyView.
The lacustrine Gördes Supradetachment Basin was developed along the Simav detachment fault during postorogenic extension in the north of the Menderes Massif in western Anatolia. The basin‐fill succession is represented by alluvial fan, Gilbert‐type delta, shoal‐water delta, foreshore, shoreface, offshore‐transition and peat‐forming mire deposits.
Ayhan Ilgar, Alper Bozkurt, Tolga Esirtgen, Ali Ergen, Ercan Tuncay, Sema Çobankaya   +5 more
wiley   +1 more source

Principles of Metamorphic Petrology

Eos, Transactions American Geophysical Union, 2009
The field of metamorphic petrology has seen spectacular advances in the past decade, including new X‐ray mapping techniques for characterizing metamorphic rocks and minerals, new internally consistent thermobarometers, new software for constructing and viewing phase diagrams, new methods to date metamorphic processes, and perhaps most significant ...
openaire   +1 more source

A New Classification Method of Surrounding Rock Quality for Phyllite Tunnels Under the Condition of Layer Orientation Parallel to the Orientation of Tunnel Axis

Energy Science &Engineering, EarlyView.
Modified Mass Classification of Layered Rock Masses Based on the HC Method. ABSTRACT The HC method for hydropower is a commonly used rock mass quality classification technique in China's hydropower industry. Due to the anisotropic nature of the layered schist in the study area, and the varying angles between different tunnel layers and the tunnel axis,
Jing Yang, Jingyong Wang, Hao Luo, Ping Wang, Chengfeng Wu, Rui Zeng, Yupeng Lu, Hao Man, Feng Ji   +8 more
wiley   +1 more source

Geochemistry and tectonomagmatic setting of protolite rocks of meta-volcanics in the Halab metamorphic complex (SW Dandy, Zanjan Province)

Journal of Economic Geology, 2019
Introduction Three fundamental goals will be followed in the study of metamorphic terrains including: 1- study of fabric in metamorphic rocks in order to recognize the relationship between metamorphism and deformation, 2- the identification of ...
Rahimeh Nafisi, Hossein Kouhestani, Mir Ali Asghar Mokhtari, Martiya Sadeghi   +3 more
doaj   +1 more source

Chemical and textural equilibration of garnet during amphibolite-facies metamorphism: The influence of coupled dissolution-reprecipitation [PDF]

, 2017
Metamorphic equilibration requires chemical communication between minerals and may be inhibited through sluggish volume diffusion and or slow rates of dissolution in a fluid phase.
Albee, Albee, Baltatzis, Barrow, Baxter, Bell, Bell, Brooks, Bucher, Béthune, Caddick, Carlson, Carlson, Carlson, Carlson, Carmichael, Cartwright, Centrella, Chernoff, Chinner, Connolly, Connolly, Dempster, Dempster, Dempster, Dempster, Dempster, Dempster, Dempster, Dohmen, Droop, England, Erambert, Etheridge, Farber, Ferry, Ferry, Florence, Florence, Frost, Ganguly, Geiger, Groome, Guidotti, Hames, Harris, Harte, Hirsch, Holdaway, Holdaway, Holdaway, Hollister, Jamtveit, Jamtveit, Karabinos, Kelly, Kohn, Kohn, Mahar, Martin, Masters, Moynihan, Mueller, Novak, Oliver, Pattison, Pattison, Phillips, Phillips, Philpotts, Pollok, Putnis, Putnis, Putnis, Putnis, Pyle, Richardson, Robyr, Rubie, Ruiz-Agudo, Ríos, Skelton, Spear, Spear, Spear, Spear, Spear, Thompson, Thompson, Thompson, Tracy, Tuccillo, Vernon, Whitney, Whitney, Whitney, Whitney, Whitney, Yang, Yardley, Yardley, Zeh, Zwart   +102 more
core   +2 more sources

Early Cretaceous–Late Miocene Basin–Mountains Pattern in the Northeastern Margin of the Tibetan Plateau, NW China: Evidence From Detrital Zircon Chronology in the Lanzhou Basin

Geological Journal, EarlyView.
Using DZmix and DZstats models, we quantified the contributions of potential sources of the Lanzhou basin. Our findings indicate that the Cenozoic cooling and denudation signals primarily originated from Qilian and West Qinling, which were the main sediment sources.
Hang Liu, Hu–jun Gong, Fen–hong Luo, Rui Zhang   +3 more
wiley   +1 more source

Intergranular diffusion rates from the analysis of garnet surfaces: implications for metamorphic equilibration [PDF]

, 2017
Novel approaches to garnet analysis have been used to assess rates of intergranular diffusion between different matrix phases and garnet porphyroblasts in a regionally metamorphosed staurolite-mica-schist from the Barrovian-type area in Scotland.
Chung, Peter, Dempster, Tim J., Symon, Shona   +2 more
core   +1 more source

Neoarchean Arc Magmatism and Crust Recycling in the Northern Marginal Zone of the Limpopo Complex, Zimbabwe: New Insights From Zircon U‐Pb‐Hf Isotopes of a Charnockite Suite

Geological Journal, EarlyView.
Charnockites with 2691–2607 Ma magmatic ages from the NMZ show arc‐magmatic geochemical signatures. They correspond to the lower‐crustal equivalent of the Chilimanzi Suite Granite in the Zimbabwe Craton. Lu‐Hf isotopic data of magmatic zircons show negative εHf(t) values (−11.18 to −2.20) with TDMC ages of 3699–3158 Ma, suggesting their protolith ...
Toshiaki Tsunogae, Md. Sazzadur Rahman, Gao Pin, M. Santosh, Wataru Fujisaki, Sam Uthup, Prince Mandingaisa   +6 more
wiley   +1 more source

Evolving Subduction Zone Thermal Structure Drives Extensive Forearc Mantle Wedge Hydration

AGU Advances
Hydration of the subduction zone forearc mantle wedge influences the downdip distribution of seismicity, the availability of fluids for arc magmatism, and Earth's long term water cycle.
G. S. Epstein, C. B. Condit, R. K. Stoner, A. F. Holt, V. E. Guevara   +4 more
doaj   +1 more source