Viscosity of fluids in subduction zones

被引：118

作者：

Audétat, A ^{[1
]}

Keppler, H ^{[1
]}

机构：

[1] Univ Tubingen, Inst Geowissensch, D-72074 Tubingen, Germany

来源：

SCIENCE | 2004年 / 303卷 / 5657期

关键词：

D O I：

10.1126/science.1092282

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The viscosities of aqueous fluids with 10 to 80 weight percent dissolved silicates have been measured at 600degrees to 950degreesC and 1.0 to 2.0 gigapascals by in situ observation of falling spheres in the diamond anvil cell. The viscosities at 800degreesC range from 10(-4) to 10(0.5) pascal seconds. The combination of low viscosities with a favorable wetting angle makes silicate-rich fluid an efficient agent for material transport at low-volume fractions. Our results therefore suggest that there may be a direct relationship between the position of the volcanic front and the onset of complete miscibility between water and silicate melt in the subducting slab.

引用

页码：513 / 516

页数：4

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