Academic Journal
Mechanical modeling of circumferential nd radial dike intrusion on Galapagos volcanoes
| العنوان: | Mechanical modeling of circumferential nd radial dike intrusion on Galapagos volcanoes |
|---|---|
| المؤلفون: | W. W. Chadwick Jr. A, J. H. Dieterich B |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://www.pmel.noaa.gov/eoi/staff/chadwick/pubs/Chadwick_1995_JVGR.pdf. |
| سنة النشر: | 1991 |
| المجموعة: | CiteSeerX |
| الوصف: | A distinctive and unusual pattern of eruptive fissures is observed on the active volcanoes of the Galapagos i lands, reflecting circumferential dike intrusion near the calderas and radial dike intrusion on the volcano flanks. Elastic finite-element models were used to investigate how a stress field could be produced and maintained to promote both circumferential nd radial dike emplacement. Modeling results show that magma reservoirs of Galapagos volcanoes are probably diapiric, because this shape promotes both circumferential and radial intrusions, but magma pressure alone cannot create the observed pattern of dikes. Loading by volcano growth and magma reservoir pressure could produce a stress field of suitable orientation but insufficient magnitude. The intrusion of circumferential dikes could alter the stress field in a way that promotes future radial diking, and vice versa. Faulting or slumping within the calderas oron the volcano flanks in response torepeated intrusions could also create a stress field conducive tocontinued intrusion. 1. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.580.930; http://www.pmel.noaa.gov/eoi/staff/chadwick/pubs/Chadwick_1995_JVGR.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.580.930 http://www.pmel.noaa.gov/eoi/staff/chadwick/pubs/Chadwick_1995_JVGR.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.DB0E1F39 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |