کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8914752 1640744 2018 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Meteoric 10Be as a tracer of subglacial processes and interglacial surface exposure in Greenland
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Meteoric 10Be as a tracer of subglacial processes and interglacial surface exposure in Greenland
چکیده انگلیسی
The highest measured 10Bemet concentrations are comparable to those found in well-developed, long-exposed soils, suggesting subglacial preservation and glacial transport of sediment exposed during preglacial or interglacial periods. Ice-bound sediment has significantly higher 10Bemet concentrations than glaciofluvial sediment, suggesting that glaciofluvial processes are sufficiently erosive to remove tracers of previous interglacial exposures. Northern Greenland sites where ice and sediment are supplied from the ice sheet's central main dome have significantly higher 10Bemet concentrations than sites in southern Greenland, indicating greater preglacial or interglacial landscape preservation in central Greenland than in the south. Because southern Greenland has more frequent and spatially extensive periods of glacial retreat but nevertheless has less evidence of past subaerial exposure, we suggest that 10Bemet measurements in glacial sediment are primarily controlled by erosional efficiency rather than interglacial exposure length.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Science Reviews - Volume 191, 1 July 2018, Pages 118-131
نویسندگان
, , , , ,