Results 41 to 50 of about 1,440 (281)

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 ...
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New Magnetite Reference Material for SIMS δ18O Measurements and a Study of Precision and Accuracy Due to Crystal Orientation Effects

Geostandards and Geoanalytical Research, EarlyView.
Key Points A new magnetite reference material (PF21mt) is available for δ18O measurements by SIMS. Reproducibility of measurement results in two laboratories suggest orientation bias of ±2‰ (2s) at 20 keV. Repeatability improves to ±1‰ (2s) when using a 13 keV protocol, suggesting reduced orientation bias. In situ isotope ratio measurements provide the
Michelle Ulrich, Daniela Rubatto, Maria Rosa Scicchitano, Benita Putlitz, Thomas Bovay   +4 more
wiley   +1 more source

Wild bee diversity and land use: A case study in a mountain agroecosystem of the Serranía de Ronda, southern Spain

Insect Conservation and Diversity, EarlyView.
Orchards supported the highest wild bee diversity and functional diversity, highlighting their role in maintaining bee communities in Mediterranean agroecosystems. Landscape heterogeneity positively influenced functional evenness and dispersion of wild bee communities, underscoring the importance of diverse landscapes for bee conservation. The presence
Violeta Hevia, Francisco M. Azcárate, Jorge Chicote, Federica Ravera   +3 more
wiley   +1 more source

Interplay Between Mechanical and Petrochemical Models on the Fluid Extraction From Subduction Zones

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The breakdown of hydrous minerals during subduction results in a densification of the rocks, producing volume changes that can trigger fluid pressure fluctuations and hydrofracturing. These volume changes are controlled by the Clapeyron slope of the reaction and are quantified here using a macroscopic framework that integrates a zero ...
Thorsten Andreas Markmann, Pierre Lanari   +1 more
wiley   +1 more source

Investigation of Antimony mineralization and mass transfer in host rocks, Baout, west of Zahedan (southeast of Iran)

Journal of Economic Geology, 2021
Introduction The Baout antimony deposit is located 80 km west of Zahedan. Antimony occurs as a trace element in Earth crust, introduced in many minerals, especially sulfides and sulfosalts and occurs as small high grade ore deposits in different parts ...
Halimeh Mojadadi Moghadam, Mohammad Boomeri, Habib Biabangard   +2 more
doaj   +1 more source

Igneous and Metamorphic Petrology

Eos, Transactions American Geophysical Union, 1983
So many new and exciting topics in petrology have appeared over the last several years that it has become difficult to find a text that deals adequately with fundamentals as well as current topics; the present book may be one of the better texts in its field today because it achieves this combination with clarity and appropriate emphasis.
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Chemical Discrimination of Rutile From Different Metamorphic Source Rocks: Dealing With Hierarchical Data Structures in Random Forest Classification

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Rutile provides a wealth of petrochronological information in metamorphic geology and due to its high stability during processes of the sedimentary cycle, rutile takes a special position in sedimentary provenance analysis. Besides being one of the classical minerals datable using the U–Pb system, rutile incorporates a broad range of trace ...
Jan Schönig, Thomas Zack, Delia Rösel, Raimon Tolosana‐Delgado, Horst Marschall, Hilmar von Eynatten, Nils Keno Lünsdorf, Mona Lueder, Matthias Konrad‐Schmolke, Jesse B. Walters   +9 more
wiley   +1 more source

Coesite Discovery in Eclogites Confirms UHP Metamorphism in the Orlica‐Śnieżnik Dome (SW Poland)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Eclogite lenses are exposed within the orthogneiss‐dominated core of the Orlica‐Śnieżnik Dome in the Sudetes, which forms the northeastern margin of the Bohemian Massif (Variscan Belt of Central Europe). The presence of coesite inclusions in garnet and omphacite confirms that these eclogites underwent ultrahigh‐pressure metamorphism.
Małgorzata Nowak, Lucie Tajčmanová, Marcin Dąbrowski, Iris Buisman, Jacek Szczepański   +4 more
wiley   +1 more source

Geochemistry and petrogenesis of the Kolah-Ghazi granitoid assemblage, south of Esfahan

Journal of Economic Geology, 2018
Introduction The Kolah-Ghazi granitoid assemblage is located in the south of Esfahan and in the Sanandaj-Sirjan magmatic-metamorphic zone. The Sanandaj-Sirjan zone is extended for 1500 km from Sirjan in the southeast to Sanandaj in the northwest of Iran
Jamshid Ahmadian, Hajar Gholamian, Ali Khan Nasr Esfahani, Maryam Honarmand   +3 more
doaj   +1 more source

Location, Location, Location: Monazite Behaviour During UHT Metamorphism and Melt Crystallization

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Monazite is a robust mineral for recording the suprasolidus evolution of migmatites and granulites. However, monazite commonly has diverse compositions and yields variable dates in a single sample; understanding the controls on monazite behaviour and composition during partial melting and melt crystallization are not always straightforward ...
Chris Yakymchuk, Jessica Gareau, Michael Williams   +2 more
wiley   +1 more source