کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7451352 1484101 2016 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Age, source, and distribution of Holocene tephra in the southern Kurile Islands: Evaluation of Holocene eruptive activities in the southern Kurile arc
ترجمه فارسی عنوان
سن، منبع و توزیع تلقی هولوسن در جزایر کوریل جنوبی: ارزیابی فعالیت های فرسوده هولوسن در قوس جنوبی کوریل
کلمات کلیدی
ترافستاتوگرافی، جزایر کروی جنوبی، هوکایدو، فعالیت فوران کننده هولوسن، شیمی شیشه ای،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی
We identified 32 distinct layers of Holocene tephra in the southern Kurile Islands on the basis of petrological features and 14C ages of soils beneath or above the tephra layers. Three layers were derived from the volcanoes of Kunashir Island: one from Mendeleev volcano (ca. 2.6 cal ka) and two from Tyatya volcano (1420 cal. BP and AD 1973). Fourteen widely distributed silicic tephra layers were derived from four volcanoes in Hokkaido: Mashu, Rausudake, Tarumai, and Hokkaido-Komagatake. A widespread tephra was derived from Baitoushan volcano, between China and North Korea. Fourteen tephra layers have unknown source volcanoes: 1 silicic medium-K ash, 2 silicic low-K ash, and 11 scoria/pumice ash layers. Except for the medium-K ash, these tephra are presumed to be derived from the volcanoes in the Kurile Islands. It has been known that caldera-forming eruptions occurred at Mashu (Hokkaido) and Lvinaya Past (Iturup) volcanoes in the early Holocene (ca. 12-8 ka). However, we did not find any tephra from Lvinaya Past volcano. Our results provide evidence of the temporal and spatial evolution of eruptive activity in the southern Kurile arc. We conclude that the level of the eruptive activity in the southern Kurile Islands (especially Kunashir Island) has been lower than that in eastern Hokkaido since 8 ka. The islands produced mainly vulcanian and strombolian eruptions of mafic magma, whereas eastern Hokkaido produced plinian eruptions of silicic magma repeated at intervals of 1000-2000 years.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary International - Volume 397, 18 March 2016, Pages 63-78
نویسندگان
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