NDLI: Sulfur as a binding agent of aggregates in explosive eruptions

Content Provider	Springer Nature Link
Author	Scolamacchia, Teresa Dingwell, Donald B.
Copyright Year	2014
Abstract	Understanding the mechanisms that govern ash aggregation is of critical importance in volcanology. Aggregation reduces the residence time of ash (≤2 mm) in the atmosphere strongly, by enhancing the sedimentation of finer-grained material generated during explosive eruptions. To date, experimental studies have focused on the expectation that water provides the strongest bonds between particles to form spherical to oblate aggregates (typically less than or equal to a few mm, occasionally up to several cm) preserved in pyroclastic deposits. Under water-rich conditions, individual accreted particles rarely exceed 1 mm. In pyroclastic density current deposits produced during the 1982 eruption of El Chichón, Mexico (which emitted 7.5 Tg of SO2 in the atmosphere), aggregate particles one to several millimeters, strongly cemented by a S-rich film, are common. They exhibit similarities with aggregates found in sulfur cones at Poás volcano, Costa Rica. We propose that sulfur is the binder between the silicate grains. Such a binding capacity implies a relatively fluid behavior of sulfur such as might be expected in the low viscosity temperature regime just above its melting point. If so, then the explosive ejection of sulfur during eruptions, combined with its ability to act as a cement for particles >2 mm, would imply that size fractions of lapilli can be efficiently removed from eruptive clouds a few kilometers from the vent. Such an aggregation mechanism would have important implications for pyroclast dispersal models and hazard assessment.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	02588900
Journal	Bulletin of Volcanology
Volume Number	76
Issue Number	10
e-ISSN	14320819
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-09-24
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aggregation Sulfur explosive eruptions lapilli and ash Geology Geophysics/Geodesy Mineralogy Sedimentology
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Growth of volcanic ash aggregates in the presence of liquid water and ice: an experimental approach

Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania : II. Eruptive behaviour during the 2007–2008 explosive eruptions

Explosive eruptive record in the Katmai region, Alaska Peninsula: an overview

MeMoVolc consensual document: a review of cross-disciplinary approaches to characterizing small explosive magmatic eruptions

Plume height, volume, and classification of explosive volcanic eruptions based on the Weibull function

Recent explosive eruptions and volcano hazards at Soputan volcano—a basalt stratovolcano in north Sulawesi, Indonesia

Numerical model of crater lake eruptions

Ash production and dispersal from sustained low-intensity Mono-Inyo eruptions

The frequency of explosive volcanic eruptions in Southeast Asia

Sulfur as a binding agent of aggregates in explosive eruptions

Similar Documents

Growth of volcanic ash aggregates in the presence of liquid water and ice: an experimental approach

Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania : II. Eruptive behaviour during the 2007–2008 explosive eruptions

Explosive eruptive record in the Katmai region, Alaska Peninsula: an overview

MeMoVolc consensual document: a review of cross-disciplinary approaches to characterizing small explosive magmatic eruptions

Plume height, volume, and classification of explosive volcanic eruptions based on the Weibull function

Recent explosive eruptions and volcano hazards at Soputan volcano—a basalt stratovolcano in north Sulawesi, Indonesia

Numerical model of crater lake eruptions

Ash production and dispersal from sustained low-intensity Mono-Inyo eruptions

The frequency of explosive volcanic eruptions in Southeast Asia

Sulfur as a binding agent of aggregates in explosive eruptions