کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4680146 1634911 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A depleted, destabilized continental lithosphere near the Rio Grande rift
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
A depleted, destabilized continental lithosphere near the Rio Grande rift
چکیده انگلیسی

Seismic waveform diffraction patterns reveal a 120 km thick slab-like anomaly with about 4% increases in both compressional and shear wave speed, extending down to nearly 600 km between the Rio Grande Rift and the western Great Plains in the southwestern United States. Monte Carlo simulations suggest that the most probable interpretation is a temperature anomaly of about − 400 K with additions of olivine (11%), orthopyroxene (12%) and losses of clinopyroxene (− 14%), garnet (− 9%) relative to the adjoining mantle asthenosphere beneath the Rio Grande Rift. This sesimic anomaly, probably continental lithosphere, is cold and is as depleted as the Archean continental lithosphere. It was likely formed in the Proterozoic age but destabilized during the Cenozoic rifting of the Rio Grande Rift.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 262, Issues 1–2, 15 October 2007, Pages 175–184
نویسندگان
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