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2003

Temporal shifts in the geochemistry and microbial community structure of an ultradeep mine borehole following isolation

Moser, D. P., Onstott, T. C., Fredrickson, J. K., Brockman, F. J., Balkwill, D. L., Drake, G. R., Pfiffner, S. M., White, D. C., Takai, K., Pratt, L. M., Fong, J., Sherwood Lollar, B., Slater, G., Phelps, T. J., Spoelstra, N., Deflaun, M., Southam, G., Welty, A. T., Baker, B. J. & Hoek, J., Jan 1 2003, In : Geomicrobiology Journal. 20, 6, p. 517-548 32 p.

Research output: Contribution to journalArticle

74 Scopus citations

The factors controlling microbial distribution and activity in the shallow subsurface

Musslewhite, C. L., McInerney, M. J., Dong, H., Onstott, T. C., Green-Blum, M., Swift, D., MacNaughton, S., White, D. C., Murray, C. & Chien, Y. J., May 1 2003, In : Geomicrobiology Journal. 20, 3, p. 245-261 17 p.

Research output: Contribution to journalArticle

25 Scopus citations

The origin of deep subsurface microbial communities in the witwatersrand basin, South Africa as deduced from apatite fission track analyses

Omar, G. I., Onstott, T. C. & Hoek, J., Feb 1 2003, In : Geofluids. 3, 1, p. 69-80 12 p.

Research output: Contribution to journalArticle

22 Scopus citations

The role of physical, chemical, and microbial heterogeneity on the field-scale transport and attachment of bacteria

Mailloux, B. J., Fuller, M. E., Onstott, T. C., Hall, J., Dong, H., DeFlaun, M. F., Streger, S. H., Rothmel, R. K., Green, M., Swift, D. J. P. & Radke, J., Jun 2003, In : Water Resources Research. 39, 6, p. SBH21-SBH217

Research output: Contribution to journalArticle

33 Scopus citations
2002

Relative dominance of physical versus chemical effects on the transport of adhesion-deficient bacteria in intact cores from South Oyster, Virginia

Dong, H., Onstott, T. C., Deflaun, M. F., Fuller, M. E., Scheibe, T. D., Streger, S. H., Rothmel, R. K. & Mailloux, B. J., Mar 1 2002, In : Environmental Science and Technology. 36, 5, p. 891-900 10 p.

Research output: Contribution to journalArticle

62 Scopus citations

Simultaneous transport of two bacterial strains in intact cores from Oyster, Virginia: Biological effects and numerical modeling

Dong, H., Rothmel, R., Onstott, T. C., Fuller, M. E., DeFlaun, M. F., Streger, S. H., Dunlap, R. & Fletcher, M., 2002, In : Applied and Environmental Microbiology. 68, 5, p. 2120-2132 13 p.

Research output: Contribution to journalArticle

33 Scopus citations

Theoretical prediction of collision efficiency between adhesion-deficient bacteria and sediment grain surface

Dong, H., Onstott, T. C., Ko, C. H., Hollingsworth, A. D., Brown, D. G. & Mailloux, B. J., Jan 1 2002, In : Colloids and Surfaces B: Biointerfaces. 24, 3-4, p. 229-245 17 p.

Research output: Contribution to journalArticle

74 Scopus citations
2001

Alkaliphilus transvaalensis gen. nov., sp. nov., an extremely alkaliphilic bacterium isolated from a deep South African gold mine

Takai, K., Moser, D. P., Onstott, T. C., Spoelstra, N., Pfiffner, S. M., Dohnalkova, A. & Fredrickson, J. K., Jan 1 2001, In : International Journal of Systematic and Evolutionary Microbiology. 51, 4, p. 1245-1256 12 p.

Research output: Contribution to journalArticle

122 Scopus citations

Archaeal Diversity in Waters from Deep South African Gold Mines

Takai, K., Moser, D. P., DeFlaun, M., Onstott, T. C. & Fredrickson, J. K., Dec 2001, In : Applied and Environmental Microbiology. 67, 12, p. 5750-5760 11 p.

Research output: Contribution to journalArticle

293 Scopus citations

Breakthroughs in field-scale bacterial transport

Balkwill, D., Chen, J., DeFlaun, M., Dobbs, F., Dong, H., Fredrickson, J., Fuller, M., Green, M., Ginn, T., Griffin, T., Holben, W., Hubbard, S., Johnson, W., Long, P., Mailloux, B., Majer, E., McLnerney, M., Murray, C., Onstott, T. C., Phelps, T. & 4 others, Scheibe, T., Swift, D., White, D. & Wobber, F., Jan 1 2001, In : Eos. 82, 38, p. 417+423-425

Research output: Contribution to journalArticle

14 Scopus citations

Comparison of methods for monitoring bacterial transport in the subsurface

DeFlaun, M. F., Fuller, M. E., Zhang, P., Johnson, W. P., Mailloux, B. J., Holben, W. E., Kovacik, W. P., Balkwill, D. L. & Onstott, T. C., Jan 1 2001, In : Journal of Microbiological Methods. 47, 2, p. 219-231 13 p.

Research output: Contribution to journalArticle

21 Scopus citations

Ferrographic tracking of bacterial transport in the field at the narrow channel focus area, Oyster, VA

Johnson, W. P., Zhang, P., Fuller, M. E., Scheibe, T. D., Mailloux, B. J., Onstott, T. C., Deflaun, M. F., Hubbard, S. S., Radtke, J., Kovacik, W. P. & Holben, W., Jan 1 2001, In : Environmental Science and Technology. 35, 1, p. 182-191 10 p.

Research output: Contribution to journalArticle

39 Scopus citations

Field-scale evaluation of CFDA/SE staining coupled with multiple detection methods for assessing the transport of bacteria in situ

Fuller, M. E., Mailloux, B. J., Zhang, P., Streger, S. H., Hall, J. A., Vainberg, S. N., Beavis, A. J., Johnson, W. P., Onstott, T. C. & DeFlaun, M. F., Sep 11 2001, In : FEMS microbiology ecology. 37, 1, p. 55-66 12 p.

Research output: Contribution to journalArticle

22 Scopus citations

Utility of high performance liquid chromatography/electrospray/mass spectrometry of polar lipids in specifically Per-13C labeled Gram-negative bacteria DA001 as a tracer for acceleration of bioremediation in the subsurface

Lytle, C. A., Fuller, M. E., Gan, Y. D. M., Peacock, A., DeFlaun, M. F., Onstott, T. C. & White, D. C., Apr 2 2001, In : Journal of Microbiological Methods. 44, 3, p. 271-281 11 p.

Research output: Contribution to journalArticle

10 Scopus citations
2000

40Ar/39Ar and Pb-Pb study of individual hornblende and feldspar grains from southeastern Baffin Island glacial sediments: Implications for the provenance of the Heinrich layers

Hemming, S. R., Gwiazda, R. H., Andrews, J. T., Broecker, W. S., Jennings, A. E. & Onstott, T. C., Jun 2000, In : Canadian Journal of Earth Sciences. 37, 6, p. 879-890 12 p.

Research output: Contribution to journalArticle

23 Scopus citations

Argon release mechanisms of biotite in vacuo and the role of short-circuit diffusion and recoil

Lo, C. H., Lee, J. K. W. & Onstott, T. C., Apr 4 2000, In : Chemical Geology. 165, 1-2, p. 135-166 32 p.

Research output: Contribution to journalArticle

51 Scopus citations

Backscattered 39Ar loss in fine-grained minerals: Implications for 40Ar/39Ar geochronology of clay

Lin, L. H., Onstott, T. C. & Dong, H., Dec 1 2000, In : Geochimica et Cosmochimica Acta. 64, 23, p. 3965-3974 10 p.

Research output: Contribution to journalArticle

9 Scopus citations

Development of a vital fluorescent staining method for monitoring bacterial transport in subsurface environments

Fuller, M. E., Streger, S. H., Rothmel, R. K., Mailloux, B. J., Hall, J. A., Onstott, T. C., Fredrickson, J. K., Balkwill, D. L. & Deflaun, M. F., 2000, In : Applied and Environmental Microbiology. 66, 10, p. 4486-4496 11 p.

Research output: Contribution to journalArticle

82 Scopus citations

Examining bacterial transport in intact cores from Oyster, Virginia: Effect of sedimentary facies type on bacterial breakthrough and retention

Fuller, M. E., Dong, H., Mailloux, B. J., Onstott, T. C. & DeFlaun, M. F., Jan 1 2000, In : Water Resources Research. 36, 9, p. 2417-2431 15 p.

Research output: Contribution to journalArticle

34 Scopus citations

Mineral transformation associated with the microbial reduction of magnetite

Dong, H., Fredrickson, J. K., Kennedy, D. W., Zachara, J. M., Kukkadapu, R. K. & Onstott, T. C., Sep 30 2000, In : Chemical Geology. 169, 3-4, p. 299-318 20 p.

Research output: Contribution to journalArticle

141 Scopus citations

Recent calcite spar in an aquifer waste plume: A possible example of contamination driven calcite precipitation

Tobin, K. J., Colwell, F. S., Onstott, T. C. & Smith, R., Sep 30 2000, In : Chemical Geology. 169, 3-4, p. 449-460 12 p.

Research output: Contribution to journalArticle

8 Scopus citations
1999

Development of radiographic and microscopic techniques for the characterization of bacterial transport in intact sediment cores from Oyster, Virginia

Dong, H., Onstott, T. C., Deflaun, M. F., Fuller, M. E., Gillespie, K. M. & Fredrickson, J. K., Aug 1 1999, In : Journal of Microbiological Methods. 37, 2, p. 139-154 16 p.

Research output: Contribution to journalArticle

10 Scopus citations

Dissimilatory reduction of Fe(III) and other electron acceptors by a Thermus isolate

Kieft, T. L., Fredrickson, J. K., Onstott, T. C., Gorby, Y. A., Kostandarithes, H. M., Bailey, T. J., Kennedy, D. W., Li, S. W., Plymale, A. E., Spadoni, C. M. & Gray, M. S., Mar 1999, In : Applied and Environmental Microbiology. 65, 3, p. 1214-1221 8 p.

Research output: Contribution to journalArticle

Open Access
200 Scopus citations

In situ imaging of microorganisms in geologic material

Tobin, K. J., Onstott, T. C., DeFlaun, M. F., Colwell, F. S. & Fredrickson, J., Sep 1 1999, In : Journal of Microbiological Methods. 37, 3, p. 201-213 13 p.

Research output: Contribution to journalArticle

18 Scopus citations

Paleofluid-flow circulation within a Triassic rift basin: Evidence from oil inclusions and thermal histories

Tseng, H. Y., Burruss, R. C., Onstott, T. C. & Omar, G., Jan 1 1999, In : Bulletin of the Geological Society of America. 111, 2, p. 275-290 16 p.

Research output: Contribution to journalArticle

13 Scopus citations
1998

Biogenic iron mineralization accompanying the dissimilatory reduction of hydrous ferric oxide by a groundwater bacterium

Fredrickson, J. K., Zachara, J. M., Kennedy, D. W., Dong, H., Onstott, T. C., Hinman, N. W. & Li, S. M., Oct 1 1998, In : Geochimica et Cosmochimica Acta. 62, 19-20, p. 3239-3257 19 p.

Research output: Contribution to journalArticle

592 Scopus citations

Hydrogeologic constraint on the origin of deep subsurface microorganisms within a Triassic basin

Tseng, H. Y., Person, M. & Onstott, T. C., Jan 1 1998, In : Water Resources Research. 34, 5, p. 937-948 12 p.

Research output: Contribution to journalArticle

11 Scopus citations

Observations pertaining to the origin and ecology of microorganisms recovered from the deep subsurface of taylorsville basin, Virginia

Onstott, T. C., Phelps, T. J., Colwell, F. S., Ringelberg, D., White, D. C., Boone, D. R., McKinley, J. P., Stevens, T. O., Long, P. E., Balkwill, D. L., Griffin, W. T. & Kieft, T., Jan 1 1998, In : Geomicrobiology Journal. 15, 4, p. 353-385 33 p.

Research output: Contribution to journalArticle

80 Scopus citations

The effect of the instability of muscovite during in vacuo heating on 40Ar/39Ar step-heating spectra

Sletten, V. W. & Onstott, T. C., Jan 1 1998, In : Geochimica et Cosmochimica Acta. 62, 1, p. 123-141 19 p.

Research output: Contribution to journalArticle

51 Scopus citations

What's up down there?

White, D. C., Phelps, T. J. & Onstott, T. C., Jun 1998, In : Current opinion in microbiology. 1, 3, p. 286-290 5 p.

Research output: Contribution to journalArticle

17 Scopus citations
1997

A tectogenetic origin for the deep subsurface microorganisms of Taylorsville Basin: Thermal and fluid flow model constraints

Tseng, H. Y. & Onstott, T. C., Jul 1 1997, In : FEMS Microbiology Reviews. 20, 3-4, p. 391-397 7 p.

Research output: Contribution to journalArticle

12 Scopus citations

Laser 40Ar/39Ar microprobe analyses of fine-grained illite

Onstott, T. C., Mueller, C., Vrolijk, P. J. & Pevear, D. R., Sep 1997, In : Geochimica et Cosmochimica Acta. 61, 18, p. 3851-3861 11 p.

Research output: Contribution to journalArticle

26 Scopus citations

Microorganisms from deep, high temperature sandstones: Constraints on microbial colonization

Colwell, F. S., Onstott, T. C., Delwiche, M. E., Chandler, D., Fredrickson, J. K., Yao, Q. J., McKinley, J. P., Boone, D. R., Griffiths, R., Phelps, T. J., Ringelberg, D., White, D. C., LaFreniere, L., Balkwill, D., Lehman, R. M., Konisky, J. & Long, P. E., Jul 1 1997, In : FEMS Microbiology Reviews. 20, 3-4, p. 425-435 11 p.

Research output: Contribution to journalArticle

82 Scopus citations

Pore-size constraints on the activity and survival of subsurface bacteria in a late cretaceous shale-sandstone sequence, northwestern new mexico

Fredrickson, J. K., McKinley, J. P., Bjornstad, B. N., Long, P. E., Ringelberg, D. B., White, D. C., Krumholz, L. R., Suflita, J. M., Colwell, F. S., Lehman, R. M., Phelps, T. J. & Onstott, T. C., Jan 1 1997, In : Geomicrobiology Journal. 14, 3, p. 183-202 20 p.

Research output: Contribution to journalArticle

160 Scopus citations

Proterozoic Thermochronologic Implications from 40Ar/39Ar and K-Ar Dating of the Campo Belo Metamorphic Complex, Southern São Francisco Craton, Brazil

Teixeira, W., Onstott, T. C., Makenya, M. & Szabó, G. A. J., Dec 1 1997, In : Anais da Academia Brasileira de Ciencias. 69, 1, p. 59-75 17 p.

Research output: Contribution to journalArticle

4 Scopus citations
1996

Constraints on the thermal history of Taylorsville Basin, Virginia, U.S.A., from fluid-inclusion and fission-track analyses: Implications for subsurface geomicrobiology experiments

Tseng, H. Y., Onstott, T. C., Burruss, R. C. & Miller, D. S., May 31 1996, In : Chemical Geology. 127, 4, p. 297-311 15 p.

Research output: Contribution to journalArticle

17 Scopus citations

Geology, genesis, and metamorphic history of the namew lake ni-cu deposit, manitoba

Menard, T., Michael Lesher, C., Stowell, H. H., Price, D. P., Pickell, J. R., Onstott, T. C. & Hulbert, L., Dec 1 1996, In : Economic Geology. 91, 8, p. 1394-1413 20 p.

Research output: Contribution to journalArticle

13 Scopus citations

Microbes deep inside the earth.

Fredrickson, J. K. & Onstott, T. C., Jan 1 1996, In : Scientific American. 275, 4, p. 68-73 6 p.

Research output: Contribution to journalArticle

94 Scopus citations

Tectonic interpretation of 40ar/39ar ages on country rocks from the central sector of the río negro-juruena province, southwest amazonian craton

Bettencourt, J. S., Onstott, T. C., Jesus, T. D. & Teixeira, W., Jan 1 1996, In : International Geology Review. 38, 1, p. 42-56 15 p.

Research output: Contribution to journalArticle

16 Scopus citations
1995

Characterization of lattice strain induced by neutron irradiation

Tseng, H. Y., Heaney, P. J. & Onstott, T. C., Sep 1 1995, In : Physics and Chemistry of Minerals. 22, 6, p. 399-405 7 p.

Research output: Contribution to journalArticle

14 Scopus citations
12 Scopus citations

Recoil refinements: Implications for the 40Ar/39Ar dating technique

Onstott, T. C., Miller, M. L., Ewing, R. C., Arnold, G. W. & Walsh, D. S., May 1995, In : Geochimica et Cosmochimica Acta. 59, 9, p. 1821-1834 14 p.

Research output: Contribution to journalArticle

116 Scopus citations

Rejuvenation of K‒Ar systems for minerals in the Taiwan Mountain Belt

Lo, C. H. & Onstott, T. C., Mar 1995, In : Earth and Planetary Science Letters. 131, 1-2, p. 71-98 28 p.

Research output: Contribution to journalArticle

65 Scopus citations
1994

Ages du metamorphisme granulitique dans le craton du Sao Francisco (Bresil). Implications sur la nature de l'orogene transamazonien

Translated title of the contribution: Ages of granulitic metamorphism in the Sao Francisco Craton (Brazil): implications for the type of the Transamazonian orogenyLedru, P., Cocherie, A., Barbosa, J., Johan, V. & Onstott, T., Jan 1 1994, In : Comptes Rendus - Academie des Sciences, Serie II: Sciences de la Terre et des Planetes. 318, 2, p. 251-257 7 p.

Research output: Contribution to journalArticle

26 Scopus citations

An assessment of 40Ar 39Ar dating for the whole-rock volcanic samples from the Luzon Arc near Taiwan

Lo, C. H., Onstott, T. C., Chen, C. H. & Lee, T., May 5 1994, In : Chemical Geology. 114, 1-2, p. 157-178 22 p.

Research output: Contribution to journalArticle

47 Scopus citations

Argon composition of metamorphic fluids: implications for 40 Ar/ 39 Ar geochronology

Cumbest, R. J., Johnson, E. L. & Onstott, T. C., Jan 1 1994, In : Geological Society of America Bulletin. 106, 7, p. 942-951 10 p.

Research output: Contribution to journalArticle

53 Scopus citations

Metamorphism and near-trench plutonism during initial accretion of the Cretaceous Alaskan forearc

Barnett, D. E., Bowman, J. R., Pavlis, T. L., Rubenstone, J. R., Snee, L. W. & Onstott, T. C., 1994, In : Journal of Geophysical Research. 99, B12, p. 24,007-24,024

Research output: Contribution to journalArticle

22 Scopus citations

Microbiologists meet geologists in Bath

Onstott, T. C., Jan 1 1994, In : Eos, Transactions American Geophysical Union. 75, 33, p. 378-379 2 p.

Research output: Contribution to journalArticle

Palaeomagnetic results from the Timbavati gabbros in the Kruger National Park, South Africa

Hargraves, R. B., Hattingh, P. J. & Onstott, T. C., Jan 1 1994, In : South African Journal of Geology. 97, 2, p. 114-118 5 p.

Research output: Contribution to journalArticle

25 Scopus citations
1993

40Ar/39Ar dating of plutonic/metamorphic rocks from Chinmen Island off southeast China and its tectonic implications

Ching-Hua Lo, L., Onstott, T. C. & Chihming Wang Lee, W. L., Jan 1 1993, In : Journal - Geological Society of China. 36, 1, p. 35-55 21 p.

Research output: Contribution to journalArticle

21 Scopus citations