Montserrat5

21 Oct 2013 | Contributor(s): Elena Ramona Stefanescu

Montserrat3

21 Oct 2013 | Contributor(s): Elena Ramona Stefanescu

Montserrat4

21 Oct 2013 | Contributor(s): Elena Ramona Stefanescu

Montserrat3

21 Oct 2013 | Contributor(s): Elena Ramona Stefanescu

Montserrat2

21 Oct 2013 | Contributor(s): Elena Ramona Stefanescu

Volcanological and Petrological study of Deccan magmatism in parts of Kachchh, Saurashtra and Mumbai - by Dr. Pooja Kshirsagar

07 Oct 2013 | Contributor(s): Pooja Vinod Kshirsagar

The presentation is an outcome of my Ph.D research work conducted on the lava flows and mafic volcanoclastic deposits of Northwestern Deccan Traps of India, at the Department of Earth Sciences, Indian Institute of Technology Bombay, India (2009-2013). It emphasize the importance of physical...

Estimating Volcanic Risk in the Lesser Antilles

26 Sep 2013 | Contributor(s): Michal Camejo, Richard E.A. Robertson

The potential catastrophic effects of future volcanic eruptions in the Lesser Antilles can be decreased by the utilisation of effective risk quantification measures and their subsequent incorporation into disaster risk reduction strategies. A volcanic risk study conducted by the Norwegian...

Physico-chemical and isotopic composition of some lakes and springs in the Bamenda Highlands, Northwest Cameroon

19 Sep 2013 | Contributor(s): Mengnjo Jude Wirmvem, T Ohba, W Y Fantong, S N Ayonghe, J Y Suila, A N E Asaah, K Asai, G Tanyileke, J V Hell

The Bamenda Highlands (6o12’N, 10 o24’E), Northwest Cameroon, is located mid-way along a chain of volcanoes (ca. 1600 km long) cutting diagonally across Cameroon called the Cameroon Volcanic Line (CVL). The area is characterized by volcanic lakes and springs. Information on the chemical...

Physico-chemical and isotopic composition of some lakes and springs in the Bamenda Highlands, North West Cameroon

19 Sep 2013 | Contributor(s): Mengnjo Jude Wirmvem

The Bamenda Highlands (6o12’N, 10 o24’E), Northwest Cameroon, is located mid-way along a chain of volcanoes (ca. 1600 km long) cutting diagonally across Cameroon called the Cameroon Volcanic Line (CVL). The area is characterized by volcanic lakes and springs. Information on the chemical...

Spherulites and thundereggs from pitchstones of the Deccan Traps: geology, petrochemistry, and emplacement environments

18 Sep 2013 | Contributor(s): Pooja Vinod Kshirsagar

Spherulites and thundereggs are rounded, typically spherical, polycrystalline objects found in glassy silicic rocks. Spherulites are dominantly made up of radiating microscopic fibers of alkali feldspar and a silica mineral (commonly quartz). They form due to heterogeneous nucleation in highly...

Mafic alkalic magmatism in central Kachchh, India- a monogenetic volcanic field in the northwestern Deccan Traps

18 Sep 2013 | Contributor(s): Pooja Vinod Kshirsagar, Badre Alam shaikh, Hetu Sheth

Magmatism in Kachchh, in the northwestern Deccan continental flood basalt province, is represented not only by typical tholeiitic flows and dikes, but also plug-like bodies, in Mesozoic sandstone, of alkali basalt, basanite, melanephelinite and nephelinite, containing mantle nodules. They form...

Specchio di Venere alkaline lake (Sicily, Italy): geochemical investigations based on gas and water compositions

18 Sep 2013 | Contributor(s): Giovannella Pecoraino, S. Bellomo, W. D’Alessandro, L. Brusca, M. Longo

The word “volcanic lake” is instinctively linked to a hot and acidic water body although alkaline lakes being not too rare. The abundant geogenic CO2 also contributes to weathering reactions within cold or thermal aquifers that release alkali and bicarbonate to groundwater. Such waters emerging...

Global volcanic unrest in the 21st century: An analysis of the first decade

16 Sep 2013 | Contributor(s): Jo Gottsmann, Rosa Sobradelo

We define volcanic unrest as the deviation from the background or baseline behaviour of a volcano towards a behaviour which is a cause for concern in the short-term because it might prelude an eruption. When unrest is preceded by periods of quiescence over centuries or millennia it is...

Olive

23 Jul 2013 | *Tools | Contributor(s): Joaquin Alberto Cortes

Olive 2.1.1 a simple fractional crystallization calculator.

International Workshop for Volcanic Disaster Preparedness

08 Sep 2013 | Workshops | Contributor(s): Kyeong Park

International Workshop for Volcanic Disaster Preparedness will be held in Jeju, Korea. When: November 03-05, 2013.This workshop will be hosted by Kwangwoon University and VDPRC.

Photos of notes from September 4, 2013 meeting in Fairbanks

05 Sep 2013 | Miscellaneous | Contributor(s): Peter W Webley

September 5th notes from PWW

05 Sep 2013 | Miscellaneous | Contributor(s): Peter W Webley

September 4th notes from PWW

04 Sep 2013 | Publications | Contributor(s): Peter W Webley

STRUCTURAL CONTROLS OF MONOGENETIC VOLCANISM

04 Sep 2013 | Presentations | Contributor(s): Adelina Geyer Traver

The factors controlling the precursory activity in monogenetic volcanic fields are still poorly understood, which means that eruption forecasts in these systems are not very accurate. The fact that in monogenetic volcanism each eruption has a different vent suggests that volcanic susceptibility...