Subduction metamorphism of serpentinite‐hosted carbonates beyond antigorite‐serpentinite dehydration (Nevado‐Filábride Complex, Spain)
نویسندگان
چکیده
منابع مشابه
Oregon subduction zone: venting, fauna, and carbonates.
Transects of the submersible Alvin across rock outcrops in the Oregon subduction zone have furnished information on the structural and stratigraphic framework of this accretionary complex. Communities of clams and tube worms, and authigenic carbonate mineral precipitates, are associated with venting sites of cool fluids located on a fault-bend anticline at a water depth of 2036 meters. The dist...
متن کاملChromium isotope fractionation during subduction-related metamorphism, black shale weathering, and hydrothermal alteration
Article history: Received 28 June 2015 Received in revised form 4 January 2016 Accepted 8 January 2016 Available online 12 January 2016 Chromium (Cr) isotopes are an emerging proxy for redox processes at Earth's surface. However, many geological reservoirs and isotope fractionation processes are still not well understood. The purpose of this contribution is to move forward our understanding of ...
متن کاملDehydration-Melting and Fluid Recycling during Metamorphism: Rangeley Formation, New Hampshire, USA
reflect the dewatering of structurally lower levels after nappe emMuscovite and biotite dehydration-melting reactions near the peak placement. If so, then nappe emplacement occurred at T~475°C. of metamorphism played a significant role in the reaction and fluid history of the Rangeley Formation in southwestern New Hampshire, USA. Evidence for in situ melting includes: (1) the consistency among ...
متن کاملMineralogy, metamorphism and geothermobarometry of the Ghandab metamorphic Complex, SE Fariman, NE Iran
The study area is located about 110 kilometers southeast of Mashhad and approximately 40 kilometers southeast of Fariman. The area is considered to be a part of the central Iran zone. It includes metamorphic rocks with different protoliths consisting of pelitic, carbonate and quartz - feldspathic rocks. The metamorphism in the study area is considered to be a contact regional metamorphism with ...
متن کاملDehydration and partial melting in subduction zones: Constraints from U-series disequilibria
We present a critical reappraisal of U-series data from arc volcanoes to constrain slab dehydration and melting processes using a global subduction zone data set. There is no clear evidence for significant mobilization of Th or Pa in dehydration fluids while the source region of arc rocks is relatively oxidized and mobility of U is strongly enhanced. It is argued that along-arc U/Th and U/Pa is...
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ژورنال
عنوان ژورنال: Journal of Metamorphic Geology
سال: 2019
ISSN: 0263-4929,1525-1314
DOI: 10.1111/jmg.12481