کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4678972 1634863 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced crustal geo-neutrino production near the Sudbury Neutrino Observatory, Ontario, Canada
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Enhanced crustal geo-neutrino production near the Sudbury Neutrino Observatory, Ontario, Canada
چکیده انگلیسی

The geo-neutrino flux at the Sudbury Neutrino Observatory depends on the local level of crustal radio-activity, which is best estimated from surface heat flux data. The surface heat flux records average crustal radio-activity over the whole crustal column and is unaffected by small-scale heterogeneities. We show how the contribution of crustal heat sources to the geo-neutrino flux can be calculated from knowledge of the surface heat flux. We present new heat flux data from two very deep holes (> 2000 m) in the Sudbury structure as well as measurements of U, Th, and K concentrations in the main geological units of the area. With all available data, the average heat flux in the Sudbury basin is ≈ 53 mW m− 2, higher than the mean value of 42 m W m− 2 for the entire Canadian Shield. The elevated heat flux is due to high heat production in the shallow crust and implies an at least 50% increase of the local crustal component of the geo-neutrino flux relative to that expected for the average crustal composition of the shield.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 288, Issues 1–2, 30 October 2009, Pages 301–308
نویسندگان
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