کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9491284 | 1630179 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Constraining water sources and hydrologic processes from the isotopic analysis of water and dissolved strontium, Lake Junin, Peru
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper presents the results of a hydrogeochemical study of the Lake Junin watershed, Peru, to evaluate the controls over chemical composition of water in this remote Andean site. Stream, spring, and lake waters in the Lake Junin basin are all Ca2+ and HCO3â type. Evaporation has enriched the δ18O of the lake water by about 6â° compared to that of input water. The 87Sr/86Sr ratio of dissolved strontium varies from 0.70777 to 0.72242 in the watershed because of water interactions with limestone and silicate rocks, respectively, in the watershed. The 87Sr/86Sr ratios of strontium in water from streams that flow through clastic sedimentary rocks east of the lake is more radiogenic (>0.7100) than elsewhere in the watershed, where the 87Sr/86Sr ratios of surface waters range between 0.7076 and 0.7090. These lower ratios are consistent with marine limestone sources found in these watersheds. Synoptic discharge measurements, combined with the strontium isotopic data, show that that three rivers provide over 90% of the surface water to the lake: the RÃo Chacachimpa, the RÃo San Juan, and the RÃo Palcamayo and about 60% of the total water input to the lake, the rest coming from direct precipitation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 312, Issues 1â4, 10 October 2005, Pages 1-13
Journal: Journal of Hydrology - Volume 312, Issues 1â4, 10 October 2005, Pages 1-13
نویسندگان
Mark A. Flusche, Geoffrey Seltzer, Donald Rodbell, Donald Siegel, Scott Samson,