Results 71 to 80 of about 24,344 (266)

Lower crustal zircons reveal Neogene metamorphism beneaththe Pannonian Basin (Hungary)

Open Geosciences, 2015
Neogene alkaline intraplate volcanic depositsin the Pannonian Basin (Hungary) contain many lowercrustal granulite-facies xenoliths. U-Pb ages have been determinedfor zircons separated from a metasedimentaryxenolith, using LA-ICPMS and SHRIMP techniques ...
Downes Hilary, Carter Andrew, Armstrong Richard, Dobosi Gabor, Embey-Isztin Antal   +4 more
doaj   +1 more source

Opposing shear senses in a subdetachment mylonite zone: Implications for core complex mechanics [PDF]

, 2010
[1] Global studies of metamorphic core complexes and low‐angle detachment faults have highlighted a fundamental problem: Since detachments excise crustal section, the relationship between the mylonitic rocks in their footwalls and the brittle deformation
E. S. Platzman, Ellen S. Platzman, Frances J. Cooper, G. Seward, Gareth Seward, J. P. Platt, John P. Platt, M. J. Grove, Marty J. Grove   +8 more
core   +4 more sources

ReMoDe – Recursive modality detection in distributions of ordinal data

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The detection of the number of modes in distributions of ordinal data is relevant for applied researchers across disciplines, from uncovering polarization to detecting incidence groups in clinical symptom scales. Yet, established modality detection methods are either purely descriptive or not developed for ordinal data.
Madlen Hoffstadt, Lourens Waldorp, Javier Garcia‐Bernardo, Han van der Maas   +3 more
wiley   +1 more source

Palaeowinds and depositional conditions from Holocene loess in Sweden and Finland

Boreas, EarlyView.
The nature of deglacial and Holocene wind regimes in Fennoscandia is debated, as is the degree to which wind‐blown loess deposits exist in the region. Loess deposits in Fennoscandia are often relatively thin, discontinuous and less well‐sorted than typical loess, and questions remain over the degree of their post‐depositional reworking and the impact ...
Calum J. Edward, Thomas Stevens, Anu Kaakinen, Jukka‐Pekka Palmu, Juha‐Pekka Lunkka, Ramona Schneider, Bjarne Almqvist   +6 more
wiley   +1 more source

Extensional faulting on Tinos island, Aegean sea, Greece: How many detachments? [PDF]

, 2007
Zircon and apatite fission track (ZFT and AFT) and (U-Th)/He, 40Ar/39Ar hornblende, and U-Pb zircon ages from the granites of Tinos Island in the Aegean Sea, Greece, suggest, together with published ZFT data, that there are three extensional detachments ...
Altherr, Andrew Carter, Avigad, Avigad, Ballard, Barbarand, Black, Boven, Brichau, Brichau, Bröcker, Bröcker, Clauer, Coulson, Dahl, Daniel Stockli, Donelick, Dürr, Esser, Farley, Faure, Forster, Foster, Fytikas, Galbraith, Gessner, Godfriaux, Green, Hejl, Hourigan, House, Hurford, Hurford, John, Kelley, Ketcham, Ketcham, Kumerics, Lee, Lister, Maluski, Maurice Brunel, Mehl, Melidonis, Miller, Patriat, Patrick Monié, Patzak, Pearce, Rahn, Regenauer-Lieb, Reiners, Ring, Ring, Ring, Ring, Ring, Ring, Ring, Ring, Robert Bolhar, Robertson, Samson, Schmädicke, Shaked, Stern, Stockli, Stockli, Stéphanie Brichau, Stöckhert, Tagami, Thomson, Tomaschek, Uwe Ring, Villa, Watson, Weidmann, Wijbrans, York, Zeffren   +79 more
core   +3 more sources

Jadeite in Continental Subduction: Its Preservation, Breakdown and Pseudomorphic Replacement in Erzgebirge UHP Gneisses

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The absence of jadeite in regions where subduction of continental crust has been documented by other high‐pressure (HP) or ultrahigh‐pressure (UHP) minerals is striking. This study presents only the second discovery of jadeite in the crystalline rocks of the Erzgebirge, a region known for its occurrences of microdiamond, coesite and omphacite ...
Ondrej Lexa, Martin Racek, Petr Jeřábek, Benjamin Paddon   +3 more
wiley   +1 more source

Metallogenic age and hydrothermal evolution of the Huangyangshan graphite deposit in eastern Xinjiang, NW China: constraint from zircon geochronology and geochemistry

Frontiers in Earth Science
The Huangyangshan graphite deposit in the East Junggar region of Xinjiang Province is the world’s first documented graphite deposit hosted within an alkaline granite intrusion.
Xinhao Sun, Yunsheng Ren, Zhenjun Sun, Jingmou Li, Mengjia Huang   +4 more
doaj   +1 more source

Variable Sr Diffusion and Implications for Rb–Sr Biotite Geochronology

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The rubidium–strontium (Rb–Sr) system has a long pedigree as a geochronological tool that relies on the application of an isochron approach. In particular, biotite contains strongly radiogenic Rb–Sr isotopes, and thus can yield meaningful crystallisation or cooling ages via this approach. However, the response of the Rb–Sr system in biotite to
Riley Rohrer, Christopher L. Kirkland, Hugo Olierook, Tim Johnson, Katy Evans   +4 more
wiley   +1 more source

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +1 more source

Late Cenozoic metamorphic evolution and exhumation of Taiwan [PDF]

, 2007
The Taiwan mountain belt is composed of a Cenozoic slate belt (Hsuehshan Range units, HR, and Backbone Slates, BS) and of accreted polymetamorphic basement rocks (Tananao Complex, TC).
Avouac, Jean-Philippe, Beyssac, Olivier, Chan, Yu-Chang, Chen, Yue-Gau, Farley, Kenneth A., Goffé, Bruno, Simoes, Martine   +6 more
core   +4 more sources