کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4713236 1638371 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Soil gas geochemistry in relation to eruptive fissures on Timanfaya volcano, Lanzarote Island (Canary Islands, Spain)
ترجمه فارسی عنوان
ژئوشیمی گازهای خاکی در ارتباط با فرسایش فوران در آتشفشان تیمانفایا، جزیره لانزروت (جزایر قناری، اسپانیا)
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی

We report herein the first results of an extensive soil gas survey performed on Timanfaya volcano on May 2011. Soil gas composition at Timanfaya volcano indicates a main atmospheric source, slightly enriched in CO2 and He. Soil CO2 concentration showed a very slight deep contribution of the Timanfaya volcanic system, with no clear relation to the main eruptive fissures of the studied area. The existence of soil helium enrichments in Timanfaya indicates a shallow degassing of crustal helium and other possible deeper sources probably form cooling magma bodies at depth. The main soil helium enrichments were observed in good agreement with the main eruptive fissures of the 1730–36 eruption, with the highest values located at those areas with a higher density of recent eruptive centers, indicating an important structural control for the leakage of helium at Timanfaya volcano. Atmospheric air slightly polluted by deep-seated helium emissions, CO2 degassed from a cooling magma body, and biogenic CO2, might be the most plausible explanation for the existence of soil gas. Helium is a deep-seated gas, exhibiting important emission rates along the main eruptive fissure of the 1730–36 eruption of Timanfaya volcano.


► Soil gas composition on Timanfaya volcano was investigated.
► Soil gases showed a main atmospheric source.
► An important structural control for the leakage of helium was found.
► Crustal He, CO2, He degassed from a cooling magma body are present on the soil gases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Volcanology and Geothermal Research - Volume 250, 15 January 2013, Pages 91–99
نویسندگان
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