Mathematics – Logic
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003trgeo...3..195a&link_type=abstract
Treatise on Geochemistry, Volume 3. Editor: Roberta L. Rudnick. Executive Editors: Heinrich D. Holland and Karl K. Turekian. pp
Mathematics
Logic
7
Scientific paper
The heating and burial of rock masses during mountain building drives chemical reactions that liberate volatile fluid species (Figure 1). These volatiles, including H2O, CO2, and CH4, are much less dense and viscous than the surrounding rock and will, therefore, have a strong tendency to migrate along grain boundaries or fractures through the Earth's crust. Fluids released in the deep crust interact geochemically with their surroundings (Rye et al., 1976) as they ascend to shallow levels where they invade hydrothermal and groundwater systems and, ultimately, interact with the hydrosphere and atmosphere. This flux of fluid from active mountain belts to the surface is a major contributor to planetary volatile cycling and is estimated to be currently in excess of ˜1017 kg Myr-1 (based on Kerrick and Caldeira, 1998; Wallmann, 2001a, b). (13K)Figure 1. Diagram of crustal fluid cycling. The deep crust is composed largely of metamorphic rock (cf. Rudnick and Fountain, 1995; Wedepohl, 1995; see Chapter 3.01). Fluids and magmas are the primary agents of chemical mass transport through the deep crust; fluid flow dominates at temperatures <˜600 °C and can be important at much higher temperatures as well - even in the granulite facies. As a consequence, an understanding of the fundamental controls exerted by metamorphic fluids on mass and heat transfer, mineral reactions, and rock rheology is critical for determining the geochemical and petrological evolution of the crust. Moreover, metamorphic fluids impact directly many problems of societal relevance, including ore deposit formation (see Chapter 3.12), global release of greenhouse gases, seismic hazards, and arc magma genesis (see Chapter 3.18) and the associated volcanic hazards. This chapter first examines basic fluid flow, mass transfer, and reaction concepts. This discussion is followed by a review of selected natural examples of fluid transport during active metamorphism. The focus is on deeper levels of the crust (>˜15 km depth), although many of the concepts discussed are general and also apply to shallower levels.
No associations
LandOfFree
Fluid Flow in the Deep Crust does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Fluid Flow in the Deep Crust, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid Flow in the Deep Crust will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1732368