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SO 2 emissions from basaltic eruptions , and the excess sulfur issue
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sharma, Kamal Nayan Blake, Stephen Krueger, Arlin J. |
| Copyright Year | 2004 |
| Abstract | [1] Volcanic SO2 can affect the Earth’s environment. Where no direct measurements of SO2 in the atmosphere are available, a petrologic method of assessing sulfur release from the magma must be used. However, in studies of arcderived eruptions, satellite-based measurements of SO2 emissions using Total Ozone Mapping Spectrometer (TOMS) data are orders of magnitude greater than those calculated petrologically, implying that a separate S-rich gas phase in the magma chamber may be responsible for the excess sulfur. We test whether this applies in other settings. For Icelandic and Hawaiian basalts we find that petrologic SO2 values are comparable to measurements of SO2 by TOMS. Thus, for non-arc basalts, the petrologic method gives reliable estimates of SO2 released. The implied absence of excess sulfur in non-arc basaltic magmas is a reflection of source magma conditions, notably lower fO2 and volatile contents than arc magmas, inhibiting the exsolution of a S-rich gas prior to eruption. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://oro.open.ac.uk/4195/1/Sharma_et_al_2004GRL.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Emission - Male genitalia finding Estimated Icelandic language Inhibition Magma Native hawaiian and other pacific islander alone:Num:Pt:^Census tract:Qn Offset binary Ozone Spectrometers Sulfur Dioxide Volatile memory orders - HL7PublishingDomain |
| Content Type | Text |
| Resource Type | Article |
