F. K. Mazdab

University of Arizona

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Joseph L. Wooden

Stanford University

J. L. Wooden

Stanford University

Calvin F. Miller

Vanderbilt University

Matthew Steele‐MacInnis

University of Alberta

C. B. Grimes

Mississippi State University

Joshua Schwartz

California State University, Northridge

C. Mark Fanning

Australian National University

Andrew P. Barth

Indiana University – Purdue University Indianapolis

M. J. Cheadle

University of Wisconsin–Madison

Lily L. Claiborne

Vanderbilt University

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United States Geological Survey

University of Arizona

Arizona State University

Stanford University

Denver Federal Center

Pacific Island Ecosystems Research Center

Chinese Academy of Geological Sciences

Planetary Science Institute

University of Wyoming

United States Department of the Interior

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U–Pb (zircon) and geochemical constraints on the age, origin, and evolution of Paleozoic arc magmas in the Oyu Tolgoi porphyry Cu–Au district, southern Mongolia

Gondwana Research (2010)

Alan J. Wainwright Richard M. Tosdal Joseph L. Wooden F. K. Mazdab Richard M. Friedman

Felsic

Devonian

Geochronology

Continental arc

Late Devonian extinction

10.1016/j.gr.2010.11.012

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Citations (120)

SIMS microanalyses for Au in silicates

American Mineralogist (2004)

R. L. Hervig F. K. Mazdab L. R. Danielson T. G. Sharp A. Hamed

Secondary ion mass spectrometry (SIMS) analyses of silicates show high sensitivity for Au when an alkali metal primary beam is used in conjunction with detection of negative secondary ions and an electron flood gun for charge neutralization. Two approaches to analysis give good results: (1) Cs primary ions and high mass resolution analysis of secondary ions, and (2) K primary ions and energy filtering (50 ± 20 eV) of the secondary ions. The latter technique shows slightly higher sensitivity but requires modification of off-the-shelf SIMS instruments whereas the former technique is accessible to most magnetic sector SIMS as delivered. Study of National Institute of Standards and Technology glasses indicates detection levels below 100 ppb by weight (~10 ppb atomic).

Primary (astronomy)

10.2138/am-2004-0404

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Thermomagmatic evolution of Mesoproterozoic crust in the Blue Ridge of SW Virginia and NW North Carolina: Evidence from U-Pb geochronology and zircon geothermometry

Geological Society of America eBooks (2010)

Richard P. Tollo John N. Aleinikoff Joseph L. Wooden F. K. Mazdab Scott Southworth

New geologic mapping, petrology, and U-Pb geochronology indicate that Mesoproterozoic crust near Mount Rogers consists of felsic to mafic meta-igneous rocks emplaced over 260 m.y. The oldest rocks are compositionally diverse and migmatitic, whereas younger granitoids are porphyritic to porphyroclastic. Cathodoluminescence imaging indicates that zircon from four representative units preserves textural evidence of multiple episodes of growth, including domains of igneous, metamorphic, and inherited origin. Sensitive high-resolution ion microprobe (SHRIMP) trace-element analyses indicate that metamorphic zircon is characterized by lower Th/U, higher Yb/Gd, and lower overall rare earth element (REE) concentrations than igneous zircon. SHRIMP U-Pb isotopic analyses of zircon...

Geochronology

Felsic

Porphyritic

10.1130/2010.1206(33)

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Citations (21)

An Occurrence of Phlogopite-rich Alteration in the Yerington District, Nevada

The Canadian Mineralogist (2019)

Simone E. Runyon F. K. Mazdab Pilar Lecumberri-Sánchez Matthew Steele‐MacInnis Eric Seedorff

Phlogopite

10.3749/canmin.1800079

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Citations (1)

Record of Fluctuating Magmatic Environments, Melt Fractionation, and Mixing of Crystals: Elemental Compositions of Zircon Zones, Spirit Mountain Batholith, Nevada

AGUFM (2006)

Calvin F. Miller Lily L. Claiborne J. L. Wooden F. K. Mazdab B. A. Walker

Batholith

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Direct Comparison of Monazite Ages Obtained By in situ Techniques: Ion-Probe Isotopic Ages Versus Electron Microprobe Chemical Ages

AGU Fall Meeting Abstracts (2005)

Robert J. Tracy C. W. Loehn Peter S. Dahl J. N. Aleinikoff J. L. Wooden

Microprobe

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Citations (1)

An Archean Wilson Cycle Recorded by Slow-growth Zircon in the Kapuskasing Uplift, Ontario, Canada

AGUFM (2006)

D. E. Moser John R. Bowman J. Wooden John W. Valley F. K. Mazdab

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Episodic intrusion, internal differentiation, and hydrothermal alteration of the Miocene Tatoosh intrusive suite south of Mount Rainier, Washington

Geological Society of America Bulletin (2010)

Edward A. du Bray Charles R. Bacon David A. John J. L. Wooden F. K. Mazdab

Research Article| March 01, 2011 Episodic intrusion, internal differentiation, and hydrothermal alteration of the Miocene Tatoosh intrusive suite south of Mount Rainier, Washington Edward A. du Bray; Edward A. du Bray † 1U.S. Geological Survey-MS 973, Box 25046, Denver Federal Center, Lakewood, Colorado 80225, USA †E-mail: edubray@usgs.gov Search for other works by this author on: GSW Google Scholar Charles R. Bacon; Charles R. Bacon 2U.S. Geological Survey-MS 910, 345 Middlefield Road, Menlo Park, California 94025, USA Search for other works by this author on: GSW Google Scholar David A. John; David A. John 3U.S. Geological Survey-MS 901, 345 Middlefield Road, Menlo Park, California 94025, USA Search for other works by this author on: GSW Google Scholar Joseph L. Wooden; Joseph L. Wooden § 4U.S. Geological Survey, Stanford–USGS Ion Microprobe Laboratory, Green Earth Sciences Research Building, Stanford, California 94305, USA §Current address: Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94025, USA Search for other works by this author on: GSW Google Scholar Frank K. Mazdab Frank K. Mazdab # 4U.S. Geological Survey, Stanford–USGS Ion Microprobe Laboratory, Green Earth Sciences Research Building, Stanford, California 94305, USA #Current address: Department of Geosciences, 1040 E. 4th St., Gould-Simpson Building (Bldg. 77), University of Arizona, Tucson, Arizona 85721, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Edward A. du Bray † 1U.S. Geological Survey-MS 973, Box 25046, Denver Federal Center, Lakewood, Colorado 80225, USA Charles R. Bacon 2U.S. Geological Survey-MS 910, 345 Middlefield Road, Menlo Park, California 94025, USA David A. John 3U.S. Geological Survey-MS 901, 345 Middlefield Road, Menlo Park, California 94025, USA Joseph L. Wooden § 4U.S. Geological Survey, Stanford–USGS Ion Microprobe Laboratory, Green Earth Sciences Research Building, Stanford, California 94305, USA Frank K. Mazdab # 4U.S. Geological Survey, Stanford–USGS Ion Microprobe Laboratory, Green Earth Sciences Research Building, Stanford, California 94305, USA †E-mail: edubray@usgs.gov §Current address: Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94025, USA #Current address: Department of Geosciences, 1040 E. 4th St., Gould-Simpson Building (Bldg. 77), University of Arizona, Tucson, Arizona 85721, USA Publisher: Geological Society of America Received: 26 May 2009 Revision Received: 23 Mar 2010 Accepted: 29 Mar 2010 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2011 Geological Society of America GSA Bulletin (2011) 123 (3-4): 534–561. https://doi.org/10.1130/B30095.1 Article history Received: 26 May 2009 Revision Received: 23 Mar 2010 Accepted: 29 Mar 2010 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Edward A. du Bray, Charles R. Bacon, David A. John, Joseph L. Wooden, Frank K. Mazdab; Episodic intrusion, internal differentiation, and hydrothermal alteration of the Miocene Tatoosh intrusive suite south of Mount Rainier, Washington. GSA Bulletin 2011;; 123 (3-4): 534–561. doi: https://doi.org/10.1130/B30095.1 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 The Miocene Tatoosh intrusive suite south of Mount Rainier is composed of three broadly granodioritic plutons that are manifestations of ancestral Cascades arc magmatism. Tatoosh intrusive suite plutons have individually diagnostic characteristics, including texture, mineralogy, and geochemistry, and apparently lack internal contacts. New ion-microprobe U-Pb zircon ages indicate crystallization of the Stevens pluton ca. 19.2 Ma, Reflection-Pyramid pluton ca. 18.5 Ma, and Nisqually pluton ca. 17.5 Ma. The Stevens pluton includes rare, statistically distinct ca. 20.1 Ma zircon antecrysts. Wide-ranging zircon rare earth element (REE), Hf, U, and Th concentrations suggest late crystallization from variably evolved residual liquids. Zircon Eu/Eu*–Hf covariation is distinct for each of the Reflection-Pyramid, Nisqually, and Stevens plutons. Although most Tatoosh intrusive suite rocks have been affected by weak hydrothermal alteration, and sparse mineralized veins cut some of these rocks, significant base or precious metal mineralization is absent.At the time of shallow emplacement, each of these magma bodies was largely homogeneous in bulk composition and petrographic features, but, prior to final solidification, each of the Tatoosh intrusive suite plutons developed internal compositional variation. Geochemical and petrographic trends within each pluton are most consistent with differential loss of residual melt, possibly represented by late aplite dikes or erupted as rhyolite, from crystal-rich magma. Crystal-rich magma that formed each pluton evidently accumulated in reservoirs below the present level of exposure and then intruded to a shallow depth. Assembled by episodic intrusion, the Tatoosh intrusive suite may be representative of midsized composite plutonic complexes beneath arc volcanoes. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Geological survey

Mount

10.1130/b30095.1

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Citations (37)

U-Pb dating of hydrothermal zircon: Fracturing and fluid flow in mantle peridotite at the MAR

Geochimica et Cosmochimica Acta Supplement (2005)

C. B. Grimes B.E. John Susan M. Swapp Jeffrey H. Schwartz F. K. Mazdab

Peridotite

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