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Metals in Basinal Brines and Petroleum

Project Objectives

The objectives of this study are to improve understanding of (1) the sources of metals and nutrients in sedimentary basins, (2) the controls on their incorporation into brine and petroleum, (3) their mechanisms of deposition on the sea floor, (4) their effects on aquatic life in the basins, (5) and their fate in the environment during mineral and petroleum resource exploitation. These goals will be accomplished through the following integrated tasks; Task 1: Studies of ancient ore deposits, secondary minerals in oil reservoirs, and fluid inclusions; Task 2: Laboratory experiments on metal partitioning between rock, oil, water, and gas; Task 3: Chemical modeling; Task 4: Studies of modern basin brines, petroleum, and sea floor vents; and Task 5: Metals, fluid flow, petroleum, and microbes in sedimentary basins: Investigations of modern analogs.

Project Chief:

Products

Products are listed according to task:

Task 1 - Studies of ancient ore deposits, secondary minerals in oil reservoirs, and fluid inclusions

Presentations

• Breit, G.N., and Emsbo, P., 2004, Metal accumulations in carbonaceous rocks-do conventional models explain observed enrichments?: Geological Society of America Abstracts with Programs, Vol. 36, No. 5, p. 199.
• Christiansen, W., Hofstra, A.H., Emsbo, P., Middle Proterozoic Sedex Au occurrences in the Belt basin in Montana (York district), GSA abstract
• Emsbo, P., 2004, Genetic links among syngenetic metal accumulations in sedimentary basins: giant sediment-hosted metal deposits to metalliferous black shales: Geological Society of America Abstracts with Programs, Vol. 36, No. 5, p. 199
• Emsbo, P., Griffin, G.L., and Hofstra, A.H., 2002, Geology, Geochemistry, and Genesis of Sedex Au Ores in the Rodeo Deposit, Carlin Trend, Nevada: GSA abstract
• Grauch, R.I., Lewan, M.D., Lamothe, P.J., Landis, G.P., and Emsbo, P., 2004, Element partitioning into generated petroleum and hydrothermal fluids as determined by hydrous pyrolysis of retort shale: Geological Society of America Abstracts with Programs, Vol. 36, No. 5, p. 199.
• Mohammed Bouabdellah, David L. Leach, Michael Anthony, and Poul Emsbo, Solute Compositions of Fluid Inclusions in Sulfides and Gangue Minerals From Touissit-Bou Beker-El Abed Mississippi Valley- Type Ore deposits: Northeastern Morocco and Adjacent Algeria,

Reports

• Emsbo, P., Hofstra, A.H, Lauha, E.A., Griffin, G.L., and Hutchinson, R.W., 2003, Origin Of High Grade Gold Ore, Source Of Ore Fluid Components, And Genesis Of Meikle And Neighboring Carlin-Type Deposits, Northern Carlin Trend, Nevada: Economic Geology and the Bulletin of the Society of Economic Geologists, vol.98, no.6, pp. 1069-1105.
• Emsbo, P., Johnson, C., in press, Formation of modern and Paleozoic stratiform barite at cold methane seeps on continental margins: Comment and Reply, Geology
• Emsbo, Poul, 2000, Gold in Sedex Deposits, Chapter 13, in Hagemann S.G., Brown, P.E., eds., Gold in 2000, Reviews in Economic Geology, v. 13, p. 427-437.
• Hofstra, A., H., and Emsbo, P., 2004, Solubility of metals and nutrients in brines: implications for ore deposits, bioproductivity, and anoxia in sedimentary basins: Abstracts with Programs - Geological Society of America, vol. 36, no. 5, pp. 199.
• Johnson, C.A., and Emsbo, P., 2004, Sulfur- and oxygen isotopes of barite deposits in sedimentary basins: implications for barite genesis, massive sulfide genesis, and sulfur redox reactions: Abstracts with Programs - Geological Society of America, vol. 36, no. 5, pp. 200-201.
• Leach, D., Marsh, E., Emsbo, P., Rombach, C.S., Kelley, K.D., and Anthony, M., 2004, Nature of the Hydrothermal Fluids at the Shale-hosted Red Dog Zinc-Lead-Silver Deposits, Brooks Range, Alaska: Economic Geology and the Bulletin of the Society of Economic Geologists, vol.99, no.7, pp.1449-1480.
• Emsbo, P., and Hofstra, A.H., 2003, Origin And Significance Of Post-Ore Dissolution Collapse Breccias Cemented With Calcite And Barite At The Meikle Gold Deposit, Northern Carlin Trend, Nevada: Economic Geology and the Bulletin of the Society of Economic Geologists, vol.98, no.6, pp.1243-1252.

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Task 2 - Laboratory experiments on metal partitioning between rock, oil, water, and gas

• No products listed for this task.

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Task 3 - Chemical modeling

Reports

• Christiansen, W.D., Premo, W.R., Hofstra, A.H., Emsbo, P., and Lange, I.M., 2002, Stratabound SRHDG Resource in Middle Proteroizoic rocks of the Big Belt Mountains near York, Montana: in Topical Session 7. Diverse Origins of Sedimentary Rock-Hosted Disseminated Gold Deposits: A Global Perspective, chaired by Albert H. Hofstra, Geological Society of America Abstracts with Programs Vol. 34, No. 6, p. 143.
• Hofstra, A.H., 2002, Diverse Origins of Sedimentary Rock-Hosted Disseminated Gold Deposits worldwide: Overview: in Topical Session 7. Diverse Origins of Sedimentary Rock-Hosted Disseminated Gold Deposits: A Global Perspective, chaired by Albert H. Hofstra, Geological Society of America Abstracts with Programs Vol. 34, No. 6, p. 140.

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Task 4 - Studies of modern basin brines, petroleum, and sea floor vents

• No products listed for this task.

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Task 5 - Metals, fluid flow, petroleum, and microbes in sedimentary basins: Investigations of modern analogs

Posters

• 2002, Eos, Transactions of the American Geophysical Union, v. 83, p. 1452

Presentations

• Stakes, D.S., Tivey, M.K., Koski, R.A., Ortego-Osorio, A., Preston, C.M., McCulloch, M.T., Nakamura, K., Seewald, J., and Wheat, C.G., 2003, Hydrothermal deposits in the Southern Trough of Guaymas Basin, Gulf of California: Observations and Preliminary Results from the 2003 MBARI Dive Program: Eos, Transactions of the American Geophysical Union, v. 84, p. F826.
• Tivey, M.K., Stakes, D.S., Bradley, A., Seewald, J., Wheat, C.G., Reysenbach, A., Page, A., and Koski, R.A., 2003, Use of thermocouple arrays to investigate the environment within actively forming chimney deposits, Guaymas Basin: Eos, Transactions of the American Geophysical Union, v. 84, p. F826.

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