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GMEG - Geophysics Unit of Menlo Park, CA- (GUMP)

 

Geophysics Unit of Menlo Park, CA (GUMP)

U.S. Geological Survey - Western Region - Geology and Geophysics

 

 

Edward A. Mankinen

Research Geologist
Geophysical Unit of Menlo Park, CA (GUMP)

U.S. Geological Survey
345 Middlefield Road, MS937
Menlo Park, CA 94025
phone: (650) 329-4669
fax: (650) 329-4664
email: emank@usgs.gov

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RESEARCH INTERESTS

Many of my earlier research activities were directed toward using a variety of paleomagnetic and rock magnetic techniques to gain a better understanding of the Earth's magnetic field and applying the knowledge obtained toward the solution of geologic problems.  More recently, a larger portion of my research activities has been directed toward the analysis and interpretation of gravity and magnetic surveys, using these potential-field data to model subsurface geologic/tectonic structures. 

 


CURRENT WORK

  • Geophysical studies are being carried out in eastern Nevada and western Utah to characterize the structural framework and subsurface shapes of tectonic basins, and provide insights into the structures that may impede or enhance ground-water flow. A 3-dimensional framework for the region is being developed and will be integrated into ground-water models. 
  • The paleomagnetic signature of sedimentary sequences in the greater San Francisco Bay region is being investigated in order to provide tentative time-lines for geologic correlation.  Data obtained will aid in understanding the mechanics of ground subsidence and provide new insights into anomalous, but brief, behavior of the geomagnetic field, intervals known as “excursions.”
  • Paleomagnetic/rock magnetic studies in the Sonoma Volcanics, CA are being used to help correlate the various lithologies (flows, breccias, tuffs, etc.), their distribution, and the role of structure in promoting or hindering groundwater flow in heterogeneous volcanic deposits. 

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PUBLICATIONS

Mankinen, E.A., 1972, Paleomagnetism and potassium-argon ages of the Sonoma Volcanics, California:  Geological Society of America Bulletin, v. 83, p. 2063-2072.

Mankinen, E.A., and Dalrymple, G.B., 1972, Electron microprobe evaluation of terrestrial basalts for whole-rock K-Ar dating:  Earth and Planetary Science Letters, v. 17, p. 89-94.

Mercer, J.H., Fleck, R.J., Mankinen, E.A., and Sander, W., 1975, Southern Patagonia–Glacial events between 4 m.y. and 1 m.y. ago, in Suggate, R.P. and Creswell, M.M., eds., Quaternary Studies:  Royal Society of New Zealand Bulletin, v. 13, p. 223-230.

Grommé‚ C.S., and Mankinen, E.A., 1976, Natural remanent magnetization, mag­netic properties, and oxidation of titanomagnetite in basaltic rocks from DSDP Leg 34, in Yeats, R.S., Hart, S.R., and others, eds., Initial Reports of the Deep Sea Drilling Project, v. 34:  Washington, D.C., U.S. Government Print­ing Office, p. 485-494.

Williams, D.L., Berkman, F., and Mankinen, E.A., 1977, Implications of a magnetic model of the Long Valley caldera, California:  Journal of Geophysical Research, v. 82, p. 3030-3038.

Mankinen, E.A., 1978, Paleomagnetic evidence for a Late Cretaceous deformation of the Great Valley Sequence, Sacramento Valley, California:  Journal of Research, U.S. Geological Survey, v. 6, p. 383-390.

Coe, R.S., Grommé‚ C.S., and Mankinen, E.A., 1978, Geomagnetic paleointensities from radiocarbon-dated lava flows on Hawaii and the question of the Pacific nondipole low:  Journal of Geophysical Research, v. 83, p. 1740-1756.

Mankinen, E.A., Donnelly, J.M., and Grommé, C.S., 1978, Geomagnetic polarity event recorded at 1.1 m.y. B.P. on Cobb Mountain, Clear Lake volcanic field, California:  Geology, v. 6, p. 653-656.

Mankinen, E.A., and Dalrymple, G.B., 1979, Revised geomagnetic polarity time scale for the interval
0 to 5 m.y. B.P.:  Journal of Geophysical Research, v. 84, p. 615-626.

Grommé‚ C.S., Mankinen, E.A., Marshall, M., and Coe, R.S., 1979, Geomagnetic paleointensities by the Thelliers' method from submarine pillow basalts–Effects of seafloor weathering:  Journal of Geophysical Research, v. 84, p. 3553-3575.

Mankinen, E.A., Donnelly-Nolan, J.M., Grommé‚ C.S., and Hearn, B.C., Jr., 1981, Paleomagnetism of the Clear Lake Volcanics and new limits on the age of the Jaramillo normal polarity event, in McLaughlin, R.J., and Donnelly-Nolan, J.M., eds., Research in the Geysers-Clear Lake Geothermal Area, northern California:  U.S. Geological Survey Professional Paper 1141, p. 67-82.

Prévot, M., Lecaille, A., and Mankinen, E.A., 1981, Magnetic effects of maghemitization of oceanic crust:  Journal of Geophysical Research, v. 86, p. 4009-4020.

Mankinen, E.A., and Irwin, W.P., 1982, Paleomagnetic study of some Cretaceous and Tertiary sedimentary rocks of the Klamath Mountains province, California:  Geology, v. 10, p. 82-87.

Mankinen, E.A., and Grommé, C.S., 1982, Paleomagnetic data from the Coso Range, California and current status of the Cobb Mountain normal geomagnetic polarity event:  Geophysical Research Letters, v. 9, p. 1279-1282.

Prévot, M., Mankinen, E.A., Grommé, S., and Lecaille, A., 1983, High paleointensities of the geomagnetic field from thermomagnetic studies on rift-valley pillow basalts from the Mid-Atlantic Ridge: Journal of Geophysical Research, v. 88, p. 2316-2326.

Coe, R.S., Grommé, S., and Mankinen, E.A., 1984, Geomagnetic paleointensities from excursion sequences in lavas on Oahu, Hawaii:  Journal of Geophysical Research, v. 89, p. 1059-1069.

Mankinen, E.A., Irwin, W.P., and Grommé, C.S., 1984, Implications of paleomagnetism for the tectonic history of the Eastern Klamath and related terranes in California and Oregon, in Nilsen, T.H., ed., Geology of the Upper Cretaceous Hornbrook Formation, California and Oregon:  Pacific Section S.E.P.M., v. 42, p. 221-229.

Mankinen, E.A., 1984, Review of book "Geomagnetism of Baked Clays and Recent Sediments" edited by K.M. Creer, P. Tucholka, and C.E. Barton:  Eos (Am. Geophys. Union Trans.), v. 65, p. 787.

Prévot, M., Mankinen, E.A., Grommé, C.S., and Coe, R.S., 1985, How the geomagnetic field vector reverses polarity:  Nature, v. 316, p. 230-234.

Mankinen, E.A., Prévot, M., Grommé, C.S., and Coe, R.S., 1985, The Steens Mountain (Oregon) geomagnetic polarity transition, 1. Directional history, duration of episodes, and rock magnetism:  Journal of Geophysical Research, v. 90, p. 10,393-10,416.

Prévot, M., Mankinen, E.A., Coe, R.S., and Grommé, C.S., 1985, The Steens Mountain (Oregon) geomagnetic polarity transition, 2. Field intensity variations and discussion of reversal models: Journal of Geophysical Research, v. 90, p. 10,417-10,448.

Mankinen, E.A., 1986, A reversal of geomagnetic polarity:  Physics Bulletin, v. 37, no. 7, p. 287-288.

Mankinen, E.A., Grommé, C.S., Dalrymple, G.B., Lanphere, M.A., and Bailey, R.A., 1986, Paleomagnetism and K-Ar ages of volcanic rocks from Long Valley caldera, California:  Journal of Geophysical Research, v. 91, p. 633-652.

Mankinen, E.A., and Plafker, G., 1987, Paleomagnetic evidence for a latest Pliocene and early Pleistocene age of the upper Yakataga Formation on Middleton Island, Alaska:  U.S. Geological Survey Circular 998, p. 132-136.

Mankinen, E.A., Larson, E.E., Grommé, C.S., Prévot, M., and Coe, R.S., 1987, The Steens Mountain (Oregon) geomagnetic polarity transition, 3. Its regional significance:  Journal of Geophysical Research, v. 92, p. 8057-8076.

Mankinen, E.A., Irwin, W.P., and Grommé, C.S., 1988, Paleomagnetic results from the Shasta Bally plutonic belt in the Klamath Mountains province, northern California:  Geophysical Research Letters,
v. 15, p. 56-59.

Mankinen, E.A., and Cox, Allan, 1988, Paleomagnetic investigation of some volcanic rocks from the McMurdo volcanic province, Antarctica:  Journal of Geophysical Research, v. 93, p. 11,599-11,612.

Mankinen, E.A., Irwin, W.P., and Grommé, C.S., 1989, Paleomagnetic study of the Eastern Klamath terrane, California, and implications for the tectonic history of the Klamath Mountains province:  Journal of Geophysical Research, v. 94, p. 10,444-10,472.

Mankinen, E.A., 1989, Revised paleomagnetic pole for the Sonoma Volcanics, California:  Geophysical Research Letters, v. 16, p. 1081-1084.

Mankinen, E.A., and Irwin, W.P., 1990, Review of paleomagnetic data from the Klamath Mountains, Blue Mountains, and Sierra Nevada; Implications for paleogeographic reconstructions, in Harwood, D.S., and Miller, M.M., eds., Paleozoic and Early Mesozoic Paleogeographic Relations; Sierra Nevada, Klamath Mountains, and Related Terranes:  Geological Society of America Special Paper 255,
p. 397-409.

Perrin, M., Prévot, M., and Mankinen, E.A., 1991, Low intensity of the geomagnetic field in Early Jurassic time:  Journal of Geophysical Research, v. 96, p. 14197-14210.

Mankinen, E.A., Grommé, C.S., and Williams, K.M., 1991, Concordant paleolatitudes from ophiolite sequences in the northern California Coast Ranges, U.S.A.:  Tectonophysics, v. 198, p. 1-21.

Mankinen, E.A., and Champion, D.E., 1993, Broad trends in geomagnetic paleointensity on Hawaii during Holocene time:  Journal of Geophysical Research, v. 98, p. 7959-7976.

Mankinen, E.A., and Champion, D.E., 1993, Latest Pleistocene and Holocene geomagnetic paleointensity on Hawaii:  Science, v. 262, p. 412-416.

Mankinen, E.A., 1994, Preliminary geomagnetic paleointensities from Long Valley caldera, California:  U.S. Geological Survey Open-File Report 94-633, 17 p.

Mankinen, E.A., Irwin, W.P., and Blome, C.D., 1996, Far-travelled Permian chert of the North Fork terrane, Klamath Mountains, California:  Tectonics, v. 15, p. 314-328.

Irwin, W.P., and Mankinen, E.A., 1998, Rotational and accretionary evolution of the Klamath Mountains, California and Oregon, from Devonian to present time:  U.S. Geological Survey Open-File Report 98-114, 1 sheet.  http://wrgis.wr.usgs.gov/open-file/of98-114/

Mankinen, E.A., Hildenbrand, T.G., Roberts, C.W., and Davidson, J.G., 1998, Principal facts for new gravity stations in the Pahute Mesa and Oasis Valley areas, Nye County, Nevada:  U.S. Geological Survey Open-File Report 98-498, 14 p.  http://www.osti.gov/bridge/

Hildenbrand, T.G., Langenheim, V.E., Mankinen, E.A., and McKee, E.H., 1999, Inversion of gravity data to define the pre-Tertiary surface and regional structures possibly influencing ground-water flow in the Pahute Mesa–Oasis Valley region, Nye County, Nevada:  U.S. Geological Survey Open-File
Report 99-49, 26 p.  http://geopubs.wr.usgs.gov/open-file/of99-49/

Mankinen, E.A., Hildenbrand, T.G., Dixon, G.L., McKee, E.H., Fridrich, C.J., and Laczniak, R.J., 1999, Gravity and magnetic study of the Pahute Mesa and Oasis Valley region, County, Nevada:  U.S. Geological Survey Open-File Report 99-303, 57 p.  http://geopubs.wr.usgs.gov/open-file/of99-303/ and http://www.osti.gov/bridge/

Fridrich, C.J., Minor, S.A., and Mankinen, E.A., 1999, Geologic evaluation of the Oasis Valley basin, Nye County, Nevada: U.S. Geological Survey Open-File Report 99-533-A, 55p.
http://www.osti.gov/bridge/

Ponce, D.A., Mankinen, E.A., Davidson, J.G., Morin, R.L., and Blakely, R.J., 1999, Digital isostatic gravity map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California:  U.S. Geological Survey Open-File Report 99-554-C, scale 1:120,000.
http://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-99-0554-c/

Mankinen, E.A., 2000, Review of book "Geomagnetism. (Research: Past and Present)" edited by Wilfried Schröder:  Earth Sciences History, v. 19, p. 219-220.

McKee, E.H., Phelps, G.A., and Mankinen, E.A., 2001, The Silent Canyon caldera–A three-dimensional model as part of a Pahute Mesa–Oasis Valley, Nevada, hydrogeologic model:  U.S. Geological Survey Open-File Report 01-297, 21 p.  http://geopubs.wr.usgs.gov/open-file/of01-297/

Ponce, D.A., Blakely, R.J., Morin, R.L., and Mankinen, E.A., 2001, Isostatic gravity map of the Death Valley ground-water model area, Nevada and California:  U.S. Geological Survey Miscellaneous Field Studies Map MF-2381-C, scale 1: 250,000.  http://greenwood.cr.usgs.gov/pub/mf-maps/mf-2381/

O’Leary, D.W., Mankinen, E.A., Blakely, R.J., Langenheim, V.E., and Ponce, D.A., 2002, Aeromagnetic expression of buried basaltic volcanoes near Yucca Mountain, Nevada:  U.S. Geological Survey Open-File Report 02-020, 48 p.  http://geopubs.wr.usgs.gov/open-file/of02-020/

Mankinen, E.A., Lindsley-Griffin, N., and Griffin, J.R., 2002, Concordant paleolatitudes for Neoproterozoic ophiolitic rocks of the Trinity Complex, Klamath Mountains, California:  Journal of Geophysical Research, 107(B10), 2254, doi:10.1029/2001JB001623.

Poag, C.W., Mankinen, E., and Norris, R.D., 2003, Late Eocene impacts: Geologic record, correlation, and paleoenvironmental consequences, in Prothero, D.R., Ivany, L.C., and Nesbitt, E.A., eds., From Greenhouse to Icehouse: The Marine Eocene-Oligocene Transition:  New York, Columbia University Press, p. 495-510.

Mankinen, E.A., and Wentworth, C.M., 2003, Preliminary paleomagnetic results from the Coyote Creek outdoor classroom drill hole, Santa Clara Valley, California:  U.S. Geological Survey Open-File Report 03-187, 32 p.  http://geopubs.wr.usgs.gov/open-file/of03-187/

Mankinen, E.A., Hildenbrand, T.G., Fridrich, C.J., McKee, E.H., and Schenkel, C.J., 2003, Geophysical setting of the Pahute Mesa–Oasis Valley region, southern Nevada:  Nevada Bureau of Mines and Geology, Report 50,  CD-ROM, 45 p.   ftp://comstock.nbmg.unr.edu/pub/dox/r50/r50.pdf

Mankinen, E.A., and Wentworth, C.M., 2004, Mono Lake excursion recorded in sediment recovered from a research well in the Santa Clara Valley, California:  Geochemistry Geophysics Geosystems, v. 5, Q02H05, doi:10.1029/2003GC000592.

Tauxe, L., Gans, P., and Mankinen, E.A., 2004, Paleomagnetism and 40Ar/39Ar ages from volcanics extruded during the Matuyama and Brunhes Chrons near McMurdo Sound, Antarctica:  Geochemistry Geophysics Geosystems, v. 5, Q06H12, doi:10.1029/2003GC000656.

Mankinen, E.A., Hildenbrand, T.G., Zientek, M.L., Box, S. E., Bookstrom, A. A., Carlson, M., and Larsen, J.C., 2004, Guide to Geophysical Data for the Northern Rocky Mountains and adjacent areas, Idaho, Montana, Washington, Oregon, and Wyoming:  U.S. Geological Survey Open-File Report
2004-1413, 31 p.   http://pubs.usgs.gov/of/2004/1413/

Mankinen, E.A., Sweetkind, D.S., McKee, E.H., and Morin, R.L., 2005, Gravity and ground magnetic data from selected traverses in the Amargosa Desert and vicinity, Nevada and California:  U.S. Geological Survey Open-File Report 2005-1444, 40 p.   http://pubs.usgs.gov/of/2005/1444/

Mankinen, E.A., Roberts, C.W., McKee, E.H., Chuchel, B.A., and Moring, B.C., 2006, Geophysical data from the Spring and Snake Valleys area, Nevada and Utah:  U.S. Geological Survey Open-File Report 2006-1160, 39 p.   http://pubs.usgs.gov/of/2006/1160/

Hildenbrand, T.G., Phelps, G., and Mankinen, E.A., 2006, Inversion of gravity data to define the pre-Cenozoic surface and regional structures possibly influencing groundwater flow in the Rainier Mesa region, Nye County, Nevada:  U.S. Geological Survey Open-File Report 2006-1299, 28 p.   http://pubs.usgs.gov/of/2006/1299/

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