Vein Assemblages and Metamorphism in Dutchess County, New York

Research Article| February 01, 1974 Vein Assemblages and Metamorphism in Dutchess County, New York ROSEMARY J. VIDALE ROSEMARY J. VIDALE 1Department of Geology and Geophysics, State University of New York at Binghamton, Binghamton, New York 13901 Search for other works by this author on: GSW Google Scholar Author and Article Information ROSEMARY J. VIDALE 1Department of Geology and Geophysics, State University of New York at Binghamton, Binghamton, New York 13901 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1974) 85 (2): 303–306. https://doi.org/10.1130/0016-7606(1974)85<303:VAAMID>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation ROSEMARY J. VIDALE; Vein Assemblages and Metamorphism in Dutchess County, New York. GSA Bulletin 1974;; 85 (2): 303–306. doi: https://doi.org/10.1130/0016-7606(1974)85<303:VAAMID>2.0.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 SocietyGSA Bulletin Search Advanced Search Abstract Mineral assemblages of fissure veins in pelitic rocks are a consistent function of metamorphic grade within a 1,700 km2 area in and near Dutchess County, New York. The following vein assemblages are cb-served with increasing grade: quartz and quartz-calcite up to just above the staurolite isograd, with limited occurrence of quarrz-albite below the biotite isograd; quartz and quartz-plagioclase (An20 to An50) from the staurolite isograde up to the sillimanite-orthoclase isograd; and quartz, quartz-plagioclase, and quartz-plagioclase-orthoclase above the sillimanite-orthoclase isograd. Extreme deformation makes relative crosscutting relations of veins difficult to determine; however, late quartz veins are fairly common, and late quartz-calcite veins are seen in high-grade rocks near marble contacts.A tentative conclusion is that quartz and quartz-calcite, quartz-plagioclase, and quartz-plagioclase-orthoclase veins form in pelitic rocks at successively higher metamorphic grades from material derived from the surrounding matrix. This may happen during prograde and retrograde metamorphism and during successive metamorphic events. 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.