Abstract
Despite the importance of volcanic production rates along subducting plate boundaries, few reliable values are available. A well-constrained rate has here been determined for the past 5 m.y. in the Mariana island arc. The calculation covers the period during the opening of the Mariana Trough (an active back-arc basin) in which the volcanic centers are located and most volcanic products are contained. About half the extruded volcanic rocks occur in central cones, with the other half in a large volcanicclastic apron. After correction of volumes for porosity and for changes in mineral densities, the average extrusion rate of 12.4 km3/km/m.y. was calculated. The local rate varies along the arc roughly as does the subduction rate. Before quantification of that correlation can be made, however, apparent temporal fluctuations of volcanism on a global scale, which do not appear to be correlated with subduction rates, must be examined and explained.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 73-82 |
| Number of pages | 10 |
| Journal | Journal of Volcanology and Geothermal Research |
| Volume | 13 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - 1982 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics
Cite this
A volcanic production rate for the Mariana island arc. / Sample, James C; Karig, D. E.
In: Journal of Volcanology and Geothermal Research, Vol. 13, No. 1-2, 1982, p. 73-82.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A volcanic production rate for the Mariana island arc
AU - Sample, James C
AU - Karig, D. E.
PY - 1982
Y1 - 1982
N2 - Despite the importance of volcanic production rates along subducting plate boundaries, few reliable values are available. A well-constrained rate has here been determined for the past 5 m.y. in the Mariana island arc. The calculation covers the period during the opening of the Mariana Trough (an active back-arc basin) in which the volcanic centers are located and most volcanic products are contained. About half the extruded volcanic rocks occur in central cones, with the other half in a large volcanicclastic apron. After correction of volumes for porosity and for changes in mineral densities, the average extrusion rate of 12.4 km3/km/m.y. was calculated. The local rate varies along the arc roughly as does the subduction rate. Before quantification of that correlation can be made, however, apparent temporal fluctuations of volcanism on a global scale, which do not appear to be correlated with subduction rates, must be examined and explained.
AB - Despite the importance of volcanic production rates along subducting plate boundaries, few reliable values are available. A well-constrained rate has here been determined for the past 5 m.y. in the Mariana island arc. The calculation covers the period during the opening of the Mariana Trough (an active back-arc basin) in which the volcanic centers are located and most volcanic products are contained. About half the extruded volcanic rocks occur in central cones, with the other half in a large volcanicclastic apron. After correction of volumes for porosity and for changes in mineral densities, the average extrusion rate of 12.4 km3/km/m.y. was calculated. The local rate varies along the arc roughly as does the subduction rate. Before quantification of that correlation can be made, however, apparent temporal fluctuations of volcanism on a global scale, which do not appear to be correlated with subduction rates, must be examined and explained.
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UR - http://www.scopus.com/inward/citedby.url?scp=0006561113&partnerID=8YFLogxK
U2 - 10.1016/0377-0273(82)90020-8
DO - 10.1016/0377-0273(82)90020-8
M3 - Article
AN - SCOPUS:0006561113
VL - 13
SP - 73
EP - 82
JO - Journal of Volcanology and Geothermal Research
JF - Journal of Volcanology and Geothermal Research
SN - 0377-0273
IS - 1-2
ER -