کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9526034 1636195 2005 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nd and Sr isotopic signatures of fine-grained clastic sediments: A case study of western Pacific marginal basins
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Nd and Sr isotopic signatures of fine-grained clastic sediments: A case study of western Pacific marginal basins
چکیده انگلیسی
Stratigraphic isotopic fluctuations within the Shikoku Basin are sharp, spanning five ɛNd units, and roughly synchronous across the topographically complex basin floor. Fluctuations in the isotopic signature are used to correlate drill holes across over 5400 km2 of basin floor. The isotopic signature of fine-grained sediments reflects the average isotopic composition of the entire source region, and stratigraphic fluctuations in the isotopic signature record variations in the relative importance of isotopically distinct crustal domains through time. Isotopic variations are synchronous across the Shikoku Basin, and are interpreted to reflect episodic basin margin volcanism superimposed on a background of hemipelagic sedimentation with a strong eolian component. Fluctuations in the isotopic signature of basinal strata ultimately result from geologic events on the basin margins and paleoclimatic influences, and may therefore be useful in reconstruction of basin evolution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sedimentary Geology - Volume 182, Issues 1–4, 15 December 2005, Pages 183-199
نویسندگان
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