A petroleum discovery-rate forecast revisited-The problem of field growth
L.J. Drew, J.H. Schuenemeyer
1992, Nonrenewable Resources (1) 51-60
A forecast of the future rates of discovery of crude oil and natural gas for the 123,027-km2 Miocene/Pliocene trend in the Gulf of Mexico was made in 1980. This forecast was evaluated in 1988 by comparing two sets of data: (1) the actual versus the forecasted number of fields discovered,...
Experiments with central-limit properties of spatial samples from locally covariant random fields
T. H. Barringer, T. E. Smith
1992, Regional Science and Urban Economics (22) 387-403
When spatial samples are statistically dependent, the classical estimator of sample-mean standard deviation is well known to be inconsistent. For locally dependent samples, however, consistent estimators of sample-mean standard deviation can be constructed. The present paper investigates the sampling properties of one such estimator, designated as the tau estimator of sample-mean standard...
Peat accumulation in coastal-plain mires: A model for coals of the Fruitland Formation (Upper Cretaceous) of southern Colorado, USA
Roberts L. N. Robinson, P.J. McCabe
1992, International Journal of Coal Geology (21) 115-138
In the northwestern part of the San Juan basin, Colorado, thick high-volatile B bituminous coal deposits in the Upper Cretaceous Fruitland Formation are associated with nearshore marine sandstones of the Pictured Cliffs Sandstone. Detailed work along the outcrop and examination of...
Seismic response of Pacific Park Plaza. I. Data and preliminary analysis
M. Çelebi, E. Safak
1992, Journal of Structural Engineering (118) 1547-1565
The objective of this paper is to present analyses of a set of acceleration response records obtained during the October 17, 1989 Loma Prieta earthquake (Ms = 7.1) from the 30-story, three-winged, ductile moment-resistant reinforced-concrete-framed Pacific Park Plaza Building, located in Emeryville, east of San Francisco, Calif. The building was...
Thermal maturity patterns of Cretaceous and Tertiary rocks, San Juan Basin, Colorado and New Mexico
B. E. Law
1992, Geological Society of America Bulletin (104) 192-207
Horizontal and vertical thermal maturity patterns and time-temperature modeling of Cretaceous and Tertiary rocks in the San Juan Basin of southwestern Colorado and northwestern New Mexico indicate that the high levels of thermal maturity in the northern part of the basin are due...
Geotechnical properties and preliminary assessment of sediment stability on the continental slope of the northwestern Alboran Sea
J. Baraza, G. Ercilla, H.J. Lee
1992, Geo-Marine Letters (12) 150-156
Laboratory analysis of core samples from the western Alboran Sea slope reveal a large variability in texture and geotechnical properties. Stability analysis suggests that the sediment is stable under static gravitational loading but potentially unstable under seismic loading. Slope failures may occur if horizontal ground accelerations greater than 0.16 g...
Gold deposition by sulfidation of ferrous Fe in the lacustrine sediments of the Pueblo Viejo district (Dominican Republic): The effect of Fe-C-S diagenesis on later hydrothermal mineralization in a Maar-Diatreme complex
R.M. Kettler, R. O. Rye, S.E. Kesler, P.A. Meyers, J. Polanco, N. Russell
1992, Chemical Geology (99) 29-50
The Pueblo Viejo district, located in the Cordillera Central of the Dominican Republic, contains large Au-Ag deposits associated with acid-sulfate alteration within spilites, conglomerates and carbonaceous sedimentary rocks that were deposited in a maar-diatreme complex. Much of the Au mineralization occurs in pyritic, carbonaceous siltstones of the Pueblo Viejo Maar-Diatreme...
The Mauna Loa environmental matrix: foliar and soil nutrients
P.M. Vitousek, G. Aplet, D. Turner, J.J. Lockwood
1992, Oecologia (89) 372-382
The accumulation of total carbon, nitrogen, and phosphorus in soils, available soil nutrients, and foliar nutrients in the native dominant Metrosideros polymorpha were determined across a wide elevational range on 9 lava flows on Mauna Loa, Hawai'i. The flows included a young (2800 y) a??a??...
Historic variation of warm-season rainfall, Southern Colorado Plateau, Southwestern U.S.A.
R. Hereford, R. H. Webb
1992, Climatic Change (22) 239-256
Rainfall during the warm season (June 15-October 15) is the most important of the year in terms of flood generation and erosion in rivers of the southern Colorado Plateau. Fluvial erosion of the plateau decreased substantially in the 1930s to early 1940s, although the cause of this change has not...
A spatial model to aggregate point-source and nonpoint-source water-quality data for large areas
D.A. White, R. A. Smith, C. V. Price, R. B. Alexander, K. W. Robinson
1992, Computers & Geosciences (18) 1055-1073
More objective and consistent methods are needed to assess water quality for large areas. A spatial model, one that capitalizes on the topologic relationships among spatial entities, to aggregate pollution sources from upstream drainage areas is described that can be implemented on land surfaces having heterogeneous water-pollution effects. An infrastructure...
Factors controlling the major ion chemistry of streams in the Blue Ridge and Valley and Ridge physiographic provinces of Virginia and Maryland
L.J. Puckett, O.P. Bricker
1992, Hydrological Processes (6) 79-98
The factors controlling the chemistry of 69 low-order streams in the Blue Ridge and Valley and Ridge physiographic provinces of Virginia and Maryland were studied over a 13-month period. Principal component analysis was used to examine regional patterns in stream chemistry and to examine...
Compost: Brown gold or toxic trouble?
D.A. Kovacic, R.A. Cahill, T.J. Bicki
1992, Environmental Science & Technology (26) 38-41
Limited data are available regarding the occurrence of potentially hazardous constituents in raw, uncomposted yard wastes, partially composted yard wastes, and finished compost (15, 16). Environmental monitoring at composting operations or facilities is lacking, and currently published research on the environmental fate of composted yard waste constituents is extremely limited....
Earth and Mars: Water inventories as clues to accretional histories
M. H. Carr, H. Wanke
1992, Icarus (98) 61-71
The Earth has 2.7 km of water on its surface. Its mantle contains at least 150 ppm water, and probably significantly more depending on the amount of undepleted mantle and subducted crustal water that is present. Geologic evidence suggests that a...
Lithology, stratigraphy, and paleoenvironments of the Mobil 312-1 well, Georges Bank Basin, US North Atlantic outer continental shelf
L.J. Poppe, C. W. Poag, R.W. Stanton
1992, Northeastern Geology (14) 156-170
The Mobil 312-1 hydrocarbon exploratory well, southeastern Georges Bank Basin penetrated a section entirely composed of sedimentary rocks that range from Middle to Pliocene age. Carbonates are the dominant lithologies in the intervals at 6096-3444 m, 2560-2096 m and 1067-887 m; siliciclastics make up most of the remaining section. Although...
Mineral resource assessment of the Annette Islands Reserve, Southeast Alaska
R. J. Horton, Susan M. Karl, Andrew Griscom, C. D. Taylor, K. R. Bond, R. Michael Senterfit
1992, Report, 1992 mineral frontiers on Indian lands
No abstract available ...
Multispectral thermal infrared mapping of the 1 October 1988 Kupaianaha flow field, Kilauea volcano, Hawaii
V.J. Realmuto, K. Hon, A.B. Kahle, E.A. Abbott, D.C. Pieri
1992, Bulletin of Volcanology (55) 33-44
Multispectral thermal infrared radiance measurements of the Kupaianaha flow field were acquired with the NASA airborne Thermal Infrared Multispectral Scanner (TIMS) on the morning of 1 October 1988. The TIMS data were used to map both the temperature and emissivity of the surface of the flow field. The temperature map...
Morphology and genesis of carbonate soils on the Kyle Canyon fan, Nevada, U.S.A.
M.C. Reheis, J.M. Sowers, E. M. Taylor, L. D. McFadden, J.W. Harden
1992, Geoderma (52) 303-342
The physical and chemical properties of soils formed in an arid climate on calcareous alluvium of the Kyle Canyon alluvial fan, southern Nevada, were studied in order to infer the rates and relative importance of various soil-forming processes. These studies included field and microscopic observations and analyses of thin sections,...
Energy budgets and resistances to energy transport in sparsely vegetated rangeland
William D. Nichols
1992, Agricultural and Forest Meteorology (60) 221-247
Partitioning available energy between plants and bare soil in sparsely vegetated rangelands will allow hydrologists and others to gain a greater understanding of water use by native vegetation, especially phreatophytes. Standard methods of conducting energy budget studies result in measurements of latent and sensible heat fluxes above the plant canopy...
The uncertainty in earthquake conditional probabilities
J.C. Savage
1992, Geophysical Research Letters (19) 709-712
The Working Group on California Earthquake Probabilities (WGCEP) questioned the relevance of uncertainty intervals assigned to earthquake conditional probabilities on the basis that the uncertainty in the probability estimate seemed to be greater the smaller the intrinsic breadth of the recurrence-interval distribution. I show here that...
Seasonal dynamics of groundwater-lake interactions at Doñana National Park, Spain
Laura A. Sacks, Janet S. Herman, Leonard F. Konikow, Antonio L. Vela
1992, Journal of Hydrology (136) 123-154
The hydrologic and solute budgets of a lake can be strongly influenced by transient groundwater flow. Several shallow interdunal lakes in southwest Spain are in close hydraulic connection with the shallow ground water. Two permanent lakes and one intermittent lake have chloride concentrations that differ by almost an order of...
The influence of pH on biotite dissolution and alteration kinetics at low temperature
James G. Acker, O.P. Bricker
1992, Geochimica et Cosmochimica Acta (56) 3073-3092
Biotite dissolution rates in acidic solutions were determined in fluidized-bed reactors and flowthrough columns. Biotite dissolution rates increased inversely as a linear function of pH in the pH range 3–7, where the rate order n = −0.34. Biotite dissolved incongruently over this pH range, with preferential release of magnesium and iron from...
Probabilistic methodology for estimation of undiscovered petroleum resources in play analysis of the United States
R. A. Crovelli
1992, Nonrenewable Resources (1) 153-162
A geostochastic system called FASPF was developed by the U.S. Geological Survey for their 1989 assessment of undiscovered petroleum resources in the United States. FASPF is a fast appraisal system for petroleum play analysis using a field-size geological model and an analytic probabilistic methodology. The geological model is a particular...
Statistical sampling of the distribution of uranium deposits using geologic/geographic clusters
W.I. Finch, W.D. Grundy, C. T. Pierson
1992, Nonrenewable Resources (1) 148-152
The concept of geologic/geographic clusters was developed particularly to study grade and tonnage models for sandstone-type uranium deposits. A cluster is a grouping of mined as well as unmined uranium occurrences within an arbitrary area about 8 km across. A cluster is a statistical sample that will reflect accurately the...
Hydrogeochemical exploration of geothermal prospects in the Tecuamburro Volcano region, Guatemala
C. J. Janik, F. Goff, L. Fahlquist, A.I. Adams, Roldan M. Alfredo, S.J. Chipera, P.E. Trujillo, D. Counce
1992, Geothermics (21) 447-481
Chemical and isotopic analyses of thermal and nonthermal waters and of gases from springs and fumaroles are used to evaluate the geothermal potential of the Tecuamburro Volcano region, Guatemala. Chemically distinct geothermal surface manifestations generally occur in separate hydrogeologic areas within this 400 km2 region: low-pressure fumaroles with temperatures near local...
A 3D, finite element model for baroclinic circulation on the Vancouver Island continental shelf
R. A. Walters, M.G.G. Foreman
1992, Journal of Marine Systems (3) 507-518
This paper describes the development and application of a 3-dimensional model of the barotropic and baroclinic circulation on the continental shelf west of Vancouver Island, Canada. A previous study with a 2D barotropic model and field data revealed that several tidal constituents have a significant baroclinic component (the K1 in...
