Session: What is a Magma Chamber? The Role of Sheets in the Assembly of Intrusions II (2005 Salt Lake City Annual Meeting (October 16

Paper #

Start Time

1

1:30 PM

PIECEMEAL EMPLACEMENT (AND CONTAMINATION?) OF A CALEDONIAN PLUTON

BARNES, Calvin G.¹, PRESTVIK, Tore², YOSHINOBU, Aaron S.³ and MCCULLOCH, Lindy¹, (1)Department of Geosciences, Texas Tech Univ, Box 41053, Lubbock, TX 79409-1053, (2)Dept. of Geology and Mineral Resources Engineering, NTNU, Trondheim, N-7491, Norway, (3)Dept. of Geosciences, Texas Tech Univ, Lubbock, TX 79409-1053, cal.barnes@ttu.edu, cal.barnes@ttu.edu

2

1:45 PM

DIFFUSION-REACTION AS A MEANS OF LARGE-SCALE MAGMA DIFFERENTIATION

LUNDSTROM, Craig, Geology, UIUC, 1301 W.Green St., 245NHB, Urbana, IL 61801, lundstro@uiuc.edu, lundstro@uiuc.edu

3

2:00 PM

THE ROLE OF FRACTIONATION AT THE EMPLACEMENT LEVEL IN THE TUOLUMNE BATHOLITH, SIERRA NEVADA, CA

ECONOMOS, Rita C., Earth Sciences, Univ of Southern California, 3651 Trousdale Parkway, ZMB 117, Los Angeles, CA 90089, MILLER, Jonathan S., Dept. of Geology, San Jose State Univ, San Jose, CA 95192-0102, PATERSON, Scott R., Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089-0740, MEMETI, Valbone, Department of Earth Sciences, Univ of Southern California, 3651 Trousdale Parkway, SCI 117, Los Angeles, CA 90089, ERDMANN, Saskia, Earth Sciences, Dalhousie Univ, Room 3006, Life Sciences Centre, Dalhousie University, Halifax, B3H 4J1 and ZAK, Jiri, Department of Geology, Faculty of Science, Charles Univ, Czech Republic, Prague, economos@usc.edu, economos@usc.edu

4

2:15 PM

PLANETARY ENVIRONMENTAL CONTROLS ON MAGMA CHAMBER GROWTH

WILSON, Lionel, Environmental Science Lancaster University, Lancaster University, Bailrigg Campus, Lancaster, LA1 4YQ, United Kingdom and HEAD III, James W., Department of Geological Sciences, Brown Univ, Providence, RI 02912, L.Wilson@Lancaster.ac.uk, L.Wilson@Lancaster.ac.uk

5

2:30 PM

DECIPHERING CHAMBER GROWTH AND INTERNAL MAGMA CHAMBER PROCESSES USING MAGMATIC LOBES AS SNAPSHOTS OF PROCESSES DURING THE CONSTRUCTION OF THE TUOLUMNE BATHOLITH, SIERRA NEVADA

MEMETI, Valbone, Department of Earth Sciences, Univ of Southern California, 3651 Trousdale Parkway, SCI 117, Los Angeles, CA 90089, PATERSON, Scott, Dept. of Earth Sciences, Univ of Southern California, 3651 Trousdale Ave, Los Angeles, CA 90089-0740, ECONOMOS, Rita C., Earth Sciences, Univ of Southern California, 3651 Trousdale Parkway, ZMB 117, Los Angeles, CA 90089, ZAK, Jiri, Department of Geology, Faculty of Science, Charles Univ, Czech Republic, Prague and ERDMANN, Saskia, Earth Sciences, Dalhousie Univ, Room 3006, Life Sciences Centre, Dalhousie University, Halifax, B3H 4J1, memeti@usc.edu, memeti@usc.edu

6

2:45 PM

AN EVALUATION OF YOUNGING DIRECTION AND PALEOVERTICAL INDICATORS IN MAGMA CHAMBERS

PIGNOTTA, Geoffrey, Univ Southern California, 3651 University Ave, Los Angeles, CA 90089-0740, PATERSON, Scott, Dept. of Earth Sciences, Univ of Southern California, 3651 Trousdale Ave, Los Angeles, CA 90089-0740 and ZAK, Jiri, Department of Geology, Faculty of Science, Charles Univ, Czech Republic, Prague, pignotta@usc.edu, pignotta@usc.edu

7

3:00 PM

EXTENSIONAL THINNING OF ROOF ROCKS ABOVE A PLUTON GROWING IN A ZONE OF INTRA-ARC EXTENSION: MODELING DEVELOPMENT OF THE MOUNT WHITNEY INTRUSIVE SUITE, SIERRA NEVADA, CALIFORNIA

HIRT, William H., Division of Natural and Applied Sciences, College of the Siskiyous, 800 College Avenue, Weed, CA 96094-2806 and HATTON, James, Natural and Applied Sciences, College of the Siskiyous, 800 College Avenue, Weed, CA 96094, hirt@siskiyous.edu, hirt@siskiyous.edu

8

3:15 PM

EMPLACEMENT OF SAUCER-SHAPED SILL INTRUSIONS CONSTRAINED BY DETAILED FIELDWORK AND AMS ANALYSES OF THE GOLDEN VALLEY SILL COMPLEX, SOUTH AFRICA

POLTEAU, Stephane¹, PLANKE, Sverre, NEUMANN, Else Ragnhild¹, GALERNE, Christophe Y.¹, MALTHE-SØRENSSEN, Anders¹, PODLADTCHIKOV, Yuri¹, SVENSEN, Henrik¹, MARSH, Julian, CHEVALLIER, Luc and LISS, Dirk, (1)Physics of Geological Processes, University of Oslo, PO BOX 1048, Oslo, 0316, Norway, polteau@fys.uio.no, polteau@fys.uio.no

9

3:30 PM

INCREMENTAL ASSEMBLY AND CHANGING EMPLACEMENT STYLES RECORDED IN THE 3.1 GA SHEETED HEERENVEEN BATHOLITH, BARBERTON GRANITOID-GREENSTONE TERRAIN, RSA

BELCHER, Richard W. and KISTERS, Alex F.M., Department of Geology, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa, rwb@sun.ac.za, rwb@sun.ac.za

10

3:45 PM

ASSEMBLY OF LARGE CORDILLERAN MAGMA CHAMBERS: THE IGNIMBRITE-CALDERA RECORD

LIPMAN, Peter W., U.S. Geol Survey, 345 Middlefield Rd, Menlo Park, CA 94025-3561, plipman@usgs.gov, plipman@usgs.gov

11

4:00 PM

MAGMA SHEETS AND OTHER CONTRIBUTIONS TO THE QUATERNARY PLUTON UNDER CRATER LAKE CALDERA, OREGON

BACON, Charles R., USGS, 345 Middlefield Rd, Menlo Park, CA 94025, cbacon@usgs.gov, cbacon@usgs.gov

12

4:15 PM

MECHANISMS AND RATES OF NON TECTONICALLY-ASSISTED MAGMA EMPLACEMENT IN THE UPPER-CRUST: THE BLACK MESA BYSMALITH, HENRY MOUNTAINS, UTAH

DE SAINT-BLANQUAT, Michel¹, HABERT, Guillaume¹, HORSMAN, Eric², MORGAN, Sven³ and TIKOFF, Basil⁴, (1)Laboratoire des Mécanismes de Transfert en Géologie, Obs. Midi-Pyrénées/Un. Paul Sabatier, 14 av. Edouard-Belin, Toulouse, 31400, France, (2)Dept. of Geology & Geophysics, Univ. of Wisconsin, Madison, WI 53706, (3)Department of Earth and Atmospheric Sciences, Central Michigan University, 314 Brooks Hall, Mount Pleasant, MI 48859, (4)Department of Geology and Geophysics, Univ of Wisconsin - Madison, 1215 W. Dayton Street, Madison, WI 53706, michel@lmtg.obs-mip.fr, michel@lmtg.obs-mip.fr

13

4:30 PM

MAGNETIC FABRICS AS INDICATORS OF MAGMA FLOW AND EMPLACEMENT MECHANISMS FOR THE SPANISH PEAKS IGNEOUS COMPLEX (SOUTH-CENTRAL COLORADO)

MUGGLETON, Scott R., Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, GEISSMAN, John, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131 and WAWRZYNIEC, Tim, Department of Earth and Planetary Sciences, Univ of New Mexico, Albuquerque, NM 87131, smuggle@unm.edu, smuggle@unm.edu

2005 Salt Lake City Annual Meeting (October 16–19, 2005)

T148. What is a Magma Chamber? The Role of Sheets in the Assembly of Intrusions II