Silica-chloride time-series of Q vent from January 2002 to November 2004. Superimposed on the fluid chemical data are fields of temperature and pressure relevant for high chloride fluids, based on experiments of Fournier [1983] and Von Damm et al. [1991], as described in Foustoukos and Seyfried [2007]. For comparison, post-eruptive silica and chloride contents of a Q vent sampled in June 2006 suggest, based on the thermodynamic model of Fontaine et al. (2009), pressure and temperature relationships of ~ 390 bars and 445°C, suggesting that after the eruption the peak pressure recorded in the hydrothermal fluid chemistry is at depths just above the axial magma lens. The figure inset shows the variation in chloride chemistry across the eruptive cycle. After both the 1991-1992 and the 2005/2006 eruptions, Q vented vapors. For a long period of time in between the eruptions, Q vented chloride-rich fluids. The two eruptions are denoted as dashed red lines in the inset. The gray field on the inset denotes fluids with chloride contents less than seawater.
Species (common):
Year: 2012
Details:
Media Type: Graph
Data Type: Chemistry:Fluid
Device Type:
Feature: EPR:9N:Q
Investigator: Julie Bryce
Expedition:
Chief Scientist:
Species: