Results 61 to 70 of about 14,747 (240)

Spatio-Temporal Evolution of Intermediate-Depth Seismicity Beneath the Himalayas: Implications for Metamorphism and Tectonics

Frontiers in Earth Science, 2021
Intermediate-depth earthquakes (>40 km) have been observed beneath the central Himalayas over decades, with little known about their nature and characteristics.
Konstantinos Michailos, N. Seth Carpenter, N. Seth Carpenter, György Hetényi   +3 more
doaj   +1 more source

Metamorphism and Metamorphic Rocks

, 2013
In the previous chapters, we learned about igneous and sedimentary rocks. This chapter presents some general concepts concerned with the process of metamorphism and the formation of metamorphic rocks. How pressure, temperature, and fluids control metamorphic processes and resulting metamorphic changes are discussed.
openaire   +1 more source

Theoretical framework for soft X‐ray Fourier transform spectroscopy using the Wigner function

Journal of Synchrotron Radiation, EarlyView.
A theoretical framework for the propagation of partially coherent Gaussian radiation in a modified Mach–Zehnder interferometer designed for Fourier transform spectroscopy applications is presented.This work presents a theoretical framework for the propagation of partially coherent Gaussian radiation in a modified Mach–Zehnder interferometer designed ...
Chuzida Chen, Andrew Lindburg, Honghe Ding, Antoine Wojdyla, Howard Padmore, Per-Anders Glans, Jinghua Guo   +6 more
wiley   +1 more source

The Effect of Background Colour on Behaviour and Development of Golden Mantella (Mantella aurantiaca) Tadpoles

Ethology, EarlyView.
This study examined how background colour influences behaviour and development in golden mantella (Mantella aurantiaca) tadpoles across ontogeny. Tadpoles preferred darker backgrounds, and this preference got less strong with increasing age. Individuals reared in darker conditions were less active but did not differ in growth rate and shelter use when ...
Prathik Amin, Joachim G. Frommen, Jade Newton‐Youens   +2 more
wiley   +1 more source

Six Ca‐Mg‐Fe Carbonate Reference Materials for In Situ Measurement of Oxygen and Carbon Isotope Ratios

Geostandards and Geoanalytical Research, EarlyView.
Key Points Six new Ca‐Mg‐Fe carbonate reference materials are available to the global geochemical community for calibrating oxygen and carbon isotope ratios by SIMS. Significant compositional matrix effects were observed in the dolomite‐ankerite and magnesite‐siderite series during SIMS analysis. Compositional matrix effects correlate with Fe variation.
Maria Rosa Scicchitano, Chris Harris, Julie Luyt, Andreas Pack, Tommaso di Rocco, Torsten Vennemann, Franziska D.H. Wilke, Anja M. Schleicher, Johannes Glodny, Kimberly T. Tait, Simon Philippo   +10 more
wiley   +1 more source

Mineralogy and metabasites formation conditions from ophiolite association at northern slope of Kuznetsk Alatau

Литосфера, 2017
The ophiolites of the northern slope of the Kuznetsk-Alatau Ridge are the most representative fragments of the sub-oceanic crust in the region. In this article, we present the results of a study of the metabasites from ophiolite paragenesis of the ...
N. A. Dugarova, P. A. Tishin, I. F. Gertner, T. S. Krasnova   +3 more
doaj   +1 more source

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

Whiteschist genesis through metasomatism and metamorphism in the Monte Rosa nappe (Western Alps) [PDF]

, 2021
Cindy Luisier, Lukas P. Baumgartner, Benita Putlitz, Torsten Vennemann   +3 more
openalex   +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

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