کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8907679 | 1635126 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
40Ar/39Ar geochronology and geochemistry of the volcanic rocks from the Arivechi region, Eastern Sonora, Mexico
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
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چکیده انگلیسی
This work provides new 40Ar/39Ar geochronological and geochemical data for the volcanism outcropping in the Arivechi region, Eastern Sonora, Mexico. Trachyandesite, dacite and rhyolite interbedded volcano-sedimentary rocks and dykes in the El Potrero Grande Unit have been dated between 76.7 and 61.1 Ma of age. The origin of the majority of these volcanic rocks could be explained by restricted assimilation of the ancient North American crust by mantle-derived magmas coupled with fractional crystallization in a subduction tectonic setting. Cretaceous-Paleocene volcanism was covered later by an ignimbrite deposit dated between 35.8 and 34.8 Ma of age. This volcanism could have been produced in a continental arc setting by crustal melting at depth of the upper-lower crust interface during the transition from a compressive to an extensional environment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of South American Earth Sciences - Volume 84, July 2018, Pages 315-342
Journal: Journal of South American Earth Sciences - Volume 84, July 2018, Pages 315-342
نویسندگان
José Luis RodrÃguez-Castañeda, Amabel Ortega-Rivera, Fernando Velasco-Tapia, Jaime Roldán-Quintana, James K.W. Lee,