The decarbonation and heat capacity of ZnCO3
H.T. Haselton, J. R. Goldsmith
1987, Geochimica et Cosmochimica Acta (51) 261-265
The decarbonation curve for ZnCO3 has been determined in the pressure range 3–20 kbar by using a combination of cold-seal vessels and piston-cylinder apparatus with NaCl assemblies. Heat capacities for both synthetic and natural ZnCO3 samples were measured by differential scanning calorimetry at temperatures ranging from 340 to 497 K. The results...
On the functional optimization of a certain class of nonstationary spatial functions
G. Christakos, P.N. Paraskevopoulos
1987, Journal of Optimization Theory and Applications (52) 191-208
Procedures are developed in order to obtain optimal estimates of linear functionals for a wide class of nonstationary spatial functions. These procedures rely on well-established constrained minimum-norm criteria, and are applicable to multidimensional phenomena which are characterized by the so-called hypothesis of inherentity. The latter requires elimination of the polynomial,...
Volcanic hazards from Bezymianny- and Bandai-type eruptions
Lee Siebert, H. Glicken, T. Ui
1987, Bulletin of Volcanology (49) 435-459
Major slope failures are a significant degradational process at volcanoes. Slope failures and associated explosive eruptions have resulted in more than 20 000 fatalities in the past 400 years; the historic record provides evidence for at least six of these events in the past century. Several historic debris avalanches exceed...
A compositional multiphase model for groundwater contamination by petroleum products: 2. Numerical solution
Arthur L. Baehr, M. Yavuz Corapcioglu
1987, Water Resources Research (23) 201-213
In this paper we develop a numerical solution to equations developed in part 1 (M. Y. Corapcioglu and A. L. Baehr, this issue) to predict the fate of an immiscible organic contaminant such as gasoline in the unsaturated zone subsequent to plume establishment. This solution, obtained by using a finite...
A preliminary report on the bentonite beds of the lower Virgin Creek Member of the Pierre Shale, Stanley County, South Dakota ( USA).
D. S. Collins
1987, Mountain Geologist (24) 81-85
The Virgin Creek Member of the Pierre Shales has been divided by earlier workers into lower and upper zones based on weathering and shale differences. Of the 49 bentonite beds of the lower Virgin Creek, the Government Draw Bentonite Beds, and bentonite bed 20 are the best markers for correlation...
U. S. GEOLOGICAL SURVEY'S NATIONAL REAL-TIME HYDROLOGIC INFORMATION SYSTEM USING GOES SATELLITE TECHNOLOGY.
William G. Shope Jr.
1987, Conference Paper
The U. S. Geological Survey maintains the basic hydrologic data collection system for the United States. The Survey is upgrading the collection system with electronic communications technologies that acquire, telemeter, process, and disseminate hydrologic data in near real-time. These technologies include satellite communications via the Geostationary Operational Environmental Satellite, Data...
Tidal and tidally averaged circulation characteristics of Suisun Bay, California
Lawrence H. Smith, Ralph T. Cheng
1987, Water Resources Research (23) 143-155
Availability of extensive field data permitted realistic calibration and validation of a hydrodynamic model of tidal circulation and salt transport for Suisun Bay, California. Suisun Bay is a partially mixed embayment of northern San Francisco Bay located just seaward of the Sacramento-San Joaquin Delta. The model employs a...
NEARSHORE SAND SOURCES FOR AMERICAN SAMOA: AN ALTERNATIVE TO USING BEACH SAND.
John R. Dingler, Thomas E. Reiss
1987, Conference Paper
Using a combination of geophysical techniques, in situ observations, and sampling by scuba divers, we investigated along the south shore of Tutuila Island, American Samoa, for nearshore sand deposits. To minimize the impact of future sand dredging on the island's littoral sediments, the search took place in a narrow zone...
ESTIMATING LOW-FLOW FREQUENCIES OF UNGAGED STREAMS IN NEW ENGLAND.
S. William Wandle Jr.
1987, Conference Paper
Equations to estimate low flows were developed using multiple-regression analysis with a sample of 48 river basins, which were selected from the U. S. Geological Survey's network of gaged river basins in Massachusetts, New Hampshire, Rhode Island, Vermont, and southwestern Maine. Low-flow characteristics are represented by the 7Q2 and 7Q10...
The inventory and distribution of water on Mars
M. H. Carr
1987, Advances in Space Research (7) 85-94
Terrain softening, fretted channels, debris flows, and closed depressions indicate that at least the upper 2 km of the cratered uplands at high latitudes (>30??) contain ice in amounts that exceed the porosity, estimated to be 10-20 percent. Theoretical studies, and lack of these features in the cratered uplands at...
Trend analysis of monthly sulfur dioxide emissions in the conterminous United States, 1975-1984
H.F. Lins
1987, Atmospheric Environment (21) 2297-2309
Trends in monthly sulfur dioxide emissions for the 48 conterminous United States during the decade 1975-1984 are identified using a robust nonparametric procedure. Statistically significant downward trends are indicated in 32 States, upward trends appear in 10 States, and no significant trend is apparent in six States. Geographically, a distinct...
Geochemistry, mineralogy, and petrogenesis of basalt from the Gorda Ridge
A. S. Davis, D.A. Clague
1987, Journal of Geophysical Research Solid Earth (92) 10467-10483
Basalt pillow lava with glassy rims was dredged from 17 sites along the Gorda Ridge between latitudes 43°N and 40.8°N. All samples are low-K2O mid-ocean ridge tholeiitic basalt having a narrow compositional range with Mg numbers clustered around 60–62; more primitive and evolved compositions are present but rare. None of...
Photoproduction of hydrated electrons from natural organic solutes in aquatic environments
R.G. Zepp, A.M. Braun, J. Hoigne, J.A. Leenheer
1987, Environmental Science & Technology (21) 485-490
No abstract available....
Nature and distribution of potential heavy-mineral resources offshore of the Atlantic Coast of the United States.
A. E. Grosz
1987, Marine Mining (6) 339-357
The US is dependent on foreign imports of placer heavy minerals for a majority of its ilmenite and rutile, and virtually all of its monazite requirements. Although sand deposits in the SE US are important domestic sources of these heavy minerals (HM) and a number of other less well-known heavy-mineral...
Magmatic history of Red Sea rifting: Perspective from the central Saudi Arabian coastal plain
J.S. Pallister
1987, Geological Society of America Bulletin (98) 400-417
A newly recognized Tertiary dike complex and comagmatic volcanic rocks exposed on the central Saudi Arabian coastal plain record early stages of magmatism related to Red Sea rifting. Intrusive and stratigraphic relationships and new potassium-argon dating indicate episodic magmatism from about 30 Ma to the present. Additional stratigraphic and radiometric...
Solubility and stability of scorodite, FeAsO4.2H2O: Discussion
D. Kirk Nordstrom, George A. Parks
1987, American Mineralogist (72) 849-851
Reported solubility data for a synthetic scorodite and the techniques used to prepare the synthetic phase are questioned. (A.M. 70-838, 72-852)-J.A.Z....
Creosote compounds in snails obtained from Pensacola Bay, Florida, near an onshore hazardous-waste site
Colleen E. Rostad, W. E. Pereira
1987, Chemosphere (16) 2397-2404
Snails, Thais haemostoma, were collected from two areas offshore in Pensacola Bay, Florida, near an onshore hazardous-waste site. Tissue from the snails was extracted to isolate the lipophilic compounds and analyzed by gas chromatography/mass spectrometry. Along with naturally occurring compounds, the snail tissue contained large concentrations of polycyclic aromatic compounds,...
Higher resolution satellite remote sensing and the impact on image mapping
Allen H. Watkins, June M. Thormodsgard
1987, Acta Astronautica (16) 221-232
Recent advances in spatial, spectral, and temporal resolution of civil land remote sensing satellite data are presenting new opportunities for image mapping applications. The U.S. Geological Survey's experimental satellite image mapping program is evolving toward larger scale image map products with increased information content as a result of improved image...
Gray whale and walrus feeding excavation on the Bering Shelf, Alaska
C.H. Nelson, K.R. Johnson, J. H. Barber Jr.
1987, Journal of Sedimentary Petrology (57) 419-430
Sidescan sonar has been used to delineate benthic feeding structures of the California gray whale ( Eschrichtius robustus ) and Pacific walrus ( Odobenus rosmarus divergens ) on the northeastern Bering Shelf. The gray whales (average mouth length, 2.0 m), when suction feeding...
Determination of the rare-earth elements in geological materials by inductively coupled plasma mass spectrometry
F.E. Lichte, Allen L. Meier, James G. Crock
1987, Analytical Chemistry (59) 1150-1157
A method of analysis of geological materials for the determination of the rare-earth elements using the Inductively coupled plasma mass spectrometric technique (ICP-MS) has been developed. Instrumental parameters and factors affecting analytical results have been first studied and then optimized. Samples are analyzed directly following an acid digestion, without the...
SEAFLOOR EXPLORATION AND CHARACTERIZATION: PREREQUISITE TO OCEAN SPACE UTILIZATION.
Gary Hill, Millington Lockwood
1987, Conference Paper, Oceans Conference Record (IEEE)
A historical survey of US bathymetric mapping is presented up through the major mapping project begun in response to the 1983, establishment of an Exclusive Economic Zone (EEZ), 200 nautical miles seaward. The EEZ extends sovereign rights for the purposes of exploring, exploiting, conserving, and managing natural resources in the...
Influence of ore type and milling process on 222Rn emanation coefficients of U mill tailings
E. R. Landa
1987, Health Physics (53) 679-683
[No abstract available]...
Coupled vibrations of rectangular buildings subjected to normally-incident random wind loads
E. Safak, D.A. Foutch
1987, Journal of Wind Engineering and Industrial Aerodynamics (26) 129-148
A method for analyzing the three-directional coupled dynamic response of wind-excited buildings is presented. The method is based on a random vibration concept and is parallel to those currently used for analyzing alongwind response. Only the buildings with rectangular cross-section and normally-incident wind are considered. The alongwind pressures and...
The U.S. Midcontinent: a new frontier for mineral exploration.
W. P. Pratt, P.K. Sims
1987, Episodes (10) 303-307
The north-central US Midcontinent is underlain by a considerable thickness of sedimentary rocks, mostly Paleozoic, which lie upon a heterogeneous basement of Precambrian granitoid and metamorphic rocks. This article describes a representative sample of Midcontinent geology and explains why the authors believe this region is a 'new frontier' for mineral...
Sulfur and lead isotope studies of stratiform Zn-Pb-Ag deposits, Anvil Range, Yukon: Basinal brine exhalation and anoxic bottom-water mixing (Canada)
Wayne C. Shanks III, L. G. Woodruff, G.A. Jilson, D.S. Jennings, J.S. Modene, B.D. Ryan
1987, Economic Geology (82) 600-634
Five stratiform Zn-Pb-Ag deposits are known in Early Cambrian metapelitic rocks along a curvilinear trend in the Anvil Range, central Yukon. The Anvil Range deposits occur along the southwestern boundary of the Selwyn basin in the stratigraphic transition zone between metapelites of the Mt. Mye unit and calcareous phyllites of...
