منابع مشابه
Water in volcanic glass: From volcanic degassing to secondary hydration
Volcanic glass is deposited with trace amounts (0.1–0.6 wt.%) of undegassed magmatic water dissolved in the glass. After deposition, meteoric water penetrates into the glass structure mostly as molecular H2O. Due to the lower dD (‰) values of non-tropical meteoric waters and the 30‰ offset between volcanic glass and environmental water during hydration, secondary water imparts lighter hydrogen ...
متن کاملCan volcanic ash poison water supplies?
Carol Stewart,*3 Lino Pizzolon,4 Thomas Wilson,1 Graham Leonard,I David Dewar,1 David Johnston,# and Shane Cronin33 7Private Consultant, Brooklyn, Wellington, New Zealand 8National University of Patagonia, Esquel, Argentina 6University of Canterbury, Christchurch, New Zealand IGNS Science, Avalon, Lower Hutt, New Zealand #GNS Science/Massey University, Avalon, Lower Hutt, New Zealand 77Massey U...
متن کاملPliocene volcanic activity of the Harrat Ash-Sham, South of Syria: geochemistry and petrogenesis
The Cenozoic volcanic activity of the Harrat Ash Sham volcanic field in south of Syria is a part of the extensive magmatism that took place in the auxiliary extension faults along the Dead Sea Fault Zone from upper Eocene to Holocene. Pliocene volcanic rocks form an important part of igneous succession in Syrian Part of Harrat as Sham. These rocks vary from basalts flows to scoria. Pliocene bas...
متن کاملantioxidant and antimicrobial activity of allium jesdianum extract
چکیده بررسی فعالیت ضد اکسیدانی و ضدمیکروبی عصاره گیاه بن سرخ (allium jesdianum) به کوشش: زهرا مقیمی هدف از این تحقیق بررسی میزان ترکیبات فنولی کل، ترکیبات فلاوونوئیدی کل، فعالیت ضداکسیدانی و ضدمیکروبی عصاره ی گیاه تازه و خشک بن سرخ بود. استخراج عصاره به روش های غوطه وری، استفاده از همزن مغناطیسی، دستگاه مایکروویو، امواج فراصوت و گرمادهی مقاومتی و با استفاده از متانول، اتانول و آب به عنوا...
Volcanic Activity on Io during 1987{1992: 4.8-m Photometry
Over the past 6 years we have conducted an extensive monitoring program of Io at near infrared wavelengths, in order to determine the location, frequency, and duration of the volcanic activity on this satellite of Jupiter. The observations were obtained at the Wyoming 2.3-m telescope using a near-infrared speckle interferometry system that provides standard photometry and in addition can locate...
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ژورنال
عنوان ژورنال: Geological Society of America Bulletin
سال: 1913
ISSN: 0016-7606,1943-2674
DOI: 10.1130/gsab-24-573