Results 61 to 70 of about 51,695 (270)

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

Petrography [PDF]

The American Naturalist, 1897
  +8 more sources

Challenges in the Analysis of Historic Concrete:Understanding the Limitations of Techniques, the Variability of the Material and the Importance of Representative Samples [PDF]

, 2020
The number of historically-significant concrete structures which require conservation and repair is ever-increasing. The use of unsuitable proprietary materials has led to poor quality repairs of historically-significant structures in the United Kingdom,
Abrams D. A., ASTM International, ASTM International, Axon E. O., Basheer P. A. M., BSI (British Standards Institution), BSI (British Standards Institution), BSI (British Standards Institution), BSI (British Standards Institution), BSI (British Standards Institution), BSI (British Standards Institution), BSI (British Standards Institution), BSI (British Standards Institution), BSI (British Standards Institution), Corish A. T., Department for Culture, Media and Sport, Eden M. A., English Heritage, Ishida T., Neville A. M., Neville A. M., Nordtest Method, Pasley C. W., Polivka M., Skinner M. G., St John D. A., Yeomans D.   +26 more
core   +2 more sources

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

Production and Distribution of Pottery in the Eastern Mediterranean: Applications of Ceramic Petrography

Internet Archaeology, 2000
The potential of applying petrographic analysis to ceramics was first fully realised by Anna Shepard in her seminal studies on prehistoric pottery from Mesoamerica and the Southwest United States in the 1930s (Shepard 1956).
Louise Joyner
doaj   +1 more source

Damage assessment of concrete structures exposed to fire [PDF]

, 2013
During a fire, concrete structures behave in most cases very well. It could therefore be of economic interest to repair the damaged structures, as costs for demolition and rebuilding can be avoided and the building can be reused faster.
Annerel, Emmanuel, Taerwe, Luc
core   +1 more source

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, EarlyView.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source

PALEOZOIC INTRAPLATE MAGMATISM OF THE EAST EUROPEAN PLATFORM: COMPARATIVE ANALYSIS OF THE PRIPYAT-DNIEPER-DONETS RIFT ZONE AND THE KOLA-ARKHANGELSK PROVINCE

Геодинамика и тектонофизика
This paper presents a comparative analysis of geochronological, geochemical, Sr-Nd isotopic data and geodynamic conditions for the Devonian magmatism of the East European Platform, using as an example the Pripyat-Dnieper-Donets rift zone in the south of ...
E. V. Yutkina, A. V. Kargin, A. A. Nosova, O. F. Kuzmenkova, L. V. Sazonova, I. A. Kondrashov   +5 more
doaj   +1 more source

Co AND Ni MINERALS IN ORES OF THE MIKHEEVSKOE PORPHYRY Cu DEPOSIT (SOUTH URALS) [PDF]

Минералогия
Co and Ni minerals are described in ores of the Mikheevskoe porphyry copper deposit (South Urals, Russia). Minerals of the cobaltite–gersdorfite series (CoAsS–NiAsS), violarite (FeNi2S4), millerite (NiS), pentlandite (Ni5.5Fe3.4)8.9S8.0 and melonite ...
O.Yu. Plotinskaya, E.V. Kovalchuk
doaj   +1 more source

Quantitative methods for quantification of montmorillonite content in bentonite clays

Georesursy, 2020
This article is devoted to the comparison of various methods for the quantitative determination of montmorillonite content in bentonite clays based on the adsorption of organic molecules and cations.
Petr E. Belousov , Boris V. Pokidko, Sergey V. Zakusin, Victoria V. Krupskaya   +3 more
doaj   +1 more source