کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8907749 | 1635128 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary
ترجمه فارسی عنوان
شواهد ژئوچنولوژیک یک استان بزرگ ماگمایی در شمال پاتاگونیا که شامل مرز پرمین-تریاس است
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
The Los Menucos Complex (northern Patagonia) consists of â¼6â¯km thick succession of acidic and intermediate volcanic and pyroclastic products, which has been traditionally assigned to the Middle/Late Triassic. New U/Pb (SHRIMP) zircon crystallization ages of 257â¯Â±â¯2 Ma at the base, 252â¯Â±â¯2 Ma at an intermediate level and 248â¯Â±â¯2 Ma near the top of the sequence, indicate that this volcanic event took place in about 10 Ma around the Permian-Triassic boundary. This volcanism can now be considered as the effusive terms of the neighboring and coeval La Esperanza Plutono-Volcanic Complex. This indicates that the climax of activity of a large magmatic province in northern Patagonia was coetaneous with the end-Permian mass extinctions. Likely correlation of La Esperanza- Los Menucos magmatic province with similar volcanic and plutonic rocks across other areas of northern Patagonia suggest a much larger extension than previously envisaged for this event. Its age, large volume and explosive nature suggest that the previously ignored potential role that this volcanism might have played in climatic deterioration around the Permian-Triassic boundary should be investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of South American Earth Sciences - Volume 82, March 2018, Pages 346-355
Journal: Journal of South American Earth Sciences - Volume 82, March 2018, Pages 346-355
نویسندگان
Tomás Luppo, Mónica G. López de Luchi, Augusto E. Rapalini, Carmen I. MartÃnez Dopico, Christopher M. Fanning,