کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9522335 | 1634964 | 2005 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the fluxes and fates of 3He accreted by the Earth with extraterrestrial particles
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
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چکیده انگلیسی
One observes appreciable concentrations of 3He in marine sediments. Extensive observational data are available for sediments in the Atlantic and Pacific oceans. We show that besides IDPs, there is an important source which is an important contributor to the flux of 3He in marine sediments. This is the GCR produced 3He in meteoroids of sizes up to â¼1 m. We compare the measured 3He fluxes in marine sediments with those predicted from solar 3He in IDPs, and from GCR produced 3He in secondary fragments of meteoroids of sizes up to â¼1 m, produced during their transit through the atmosphere. Our studies allow us to reach plausible conclusions regarding the predominant source of 3He in marine sediments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 235, Issues 1â2, 30 June 2005, Pages 375-390
Journal: Earth and Planetary Science Letters - Volume 235, Issues 1â2, 30 June 2005, Pages 375-390
نویسندگان
Devendra Lal, Anthony J.T. Jull,