Evidence for major mass transfer and volume strain during regional metamorphism of pelites
1991; Geological Society of America; Volume: 19; Issue: 8 Linguagem: Inglês
10.1130/0091-7613(1991)019 2.3.co;2
ISSN1943-2682
Autores Tópico(s)Geological and Geophysical Studies Worldwide
ResumoResearch Article| August 01, 1991 Evidence for major mass transfer and volume strain during regional metamorphism of pelites Jay J. Ague Jay J. Ague 1Department of Geology and Geophysics, Yale University, P.O. Box 6666, New Haven, Connecticut 06511 Search for other works by this author on: GSW Google Scholar Author and Article Information Jay J. Ague 1Department of Geology and Geophysics, Yale University, P.O. Box 6666, New Haven, Connecticut 06511 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1991) 19 (8): 855–858. https://doi.org/10.1130/0091-7613(1991)019 2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Jay J. Ague; Evidence for major mass transfer and volume strain during regional metamorphism of pelites. Geology 1991;; 19 (8): 855–858. doi: https://doi.org/10.1130/0091-7613(1991)019 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Systematic examination of published sedimentary and metamorphosed pelite analyses has revealed evidence of significant mass transfer and volume strain during regional metamorphism. Statistical analysis of the data shows that Barrovian zone metamorphism of pelitic schist generally causes increases in the whole-rock concentrations of the low-solubility elements Ti and All The observed increases in Ti and Al contents as functions of metamorphic grade are almost certainly due to residual enrichment caused by the removal of other more soluble species. Application of mass-balance principles to the petite compositional trends indicates that the average pelite may lose as much as 30% of its mass and volume during progressive metamorphism from subgreenschist to amphibolite facies conditions. The bulk of the lost mass is silica, not volatiles. In addition, other elements, particularly Ca, Na, and K, appear to be highly mobile in deep-crustal metamorphism. Contrary to conventional interpretations, it is concluded that the regional metamorphism of pelites is not an isochemical process. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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