Welcome to the new Datapages Archives
Datapages has redesigned the Archives with new features. You can search from the home page or browse content from over 40 publishers and societies. Non-subscribers may now view abstracts on all items before purchasing full text. Please continue to send us your feedback at emailaddress.
AAPG Members: Your membership includes full access to the online archive of the AAPG Bulletin. Please login at Members Only. Access to full text from other collections requires a subscription or pay-per-view document purchase.
Welcome to the new Datapages Archives
Search Results > New Search > Revise Search
The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,619 documents.
Late Maastrichtian paleovalley systems in west-central Alberta: Mapping the Battle Formation in the subsurface
Benjamin Hathway
CSPG Bulletin
... as control points to generate an isopach map for the Battle Formation (Fig. 5) using the ‘highly connected features (least squares)’ option with a 1000 × 1000...
2011
Potassium-Argon Isotopic Dating Method and Its Application to Physical Time-Scale Studies
Ian McDougall
AAPG Special Volumes
... analysis of argon extracted at temperatures indicated for hornblende 5H plotted on isochron diagram. Slope of line, determined by a least-squares procedure...
1978
Seismic Velocity Variations in San Joaquin Valley, California
Walter S. Olson
AAPG Bulletin
..., and the linear increase of interval velocity with depth. Both equations may be fitted to data by using least squares. These equations give the simplest...
1941
Structure of Falkland Plateau and Offshore Tierra del Fuego, Argentina: Rifted Margins
W. J. Ludwig , C. C. Windisch , R. E. Houtz , J. I. Ewing
AAPG Special Volumes
... of the Falkland Islands. The velocity regression equation (least-squares fit) of the interval velocities of seismic layers to one-way travel time...
1979
Crustal Structure of Queen Elizabeth Islands and Polar Continental Margin, Canada: Evolution of Arctic Ocean Basin
L. W. Sobczak, J. R. Weber
AAPG Special Volumes
... of least squares. By using the greater number of measurements and concentrating on the smaller anomalies, Bhattacharyya was able to provide reater...
1973
Do Moment Tensors Flip During Hydraulic Completions?
Adam Baig, Sepideh Karimi, Benjamin Witten, Aaron Booterbaugh
Unconventional Resources Technology Conference (URTEC)
... recorded from a mixed array of surface and near-surface, wellbore deployed geophones and the moment tensors we obtain therefrom through least-squares...
2022
Late Oligocene Sequence Stratigraphy (lower Arcadia Formation) of Southwest Florida
Missimer, Thomas M.
GCAGS Transactions
... p. Kirschvink, J. L., 1980, The least-squares line and plane and analysis of paleomagnetic data: Geophysical Journal of the Royal Astronomical Society...
2002
New Experimental Method for Enhanced and Fast Saturation of Irregular-Shaped Tight Rock Samples
Sabyasachi Dash, Zoya Heidari
Unconventional Resources Technology Conference (URTEC)
.... Solving Least Squares Problems. Society for Industrial and Applied Mathematics (SIAM). DOI: 10.1137/1.9871611971217. Luffel, D.L. and Guidry, F.K....
2024
Subtidal Holocene Dolomite, Baffin Bay, Texas
E. William Behrens, Lynton S. Land
Journal of Sedimentary Research (SEPM)
...------------------------ least squares fit using all available data and the percent of MgCO3 in the unit cell is reported based on the ao parameter...
1972
Characterizing the Tops of Devonian Units in the Challenging Sub-Andean Region of Bolivia
Paola Delgado, Gerardo Villacorta, Andrea Di Daniel, Karim Bondabou
Unconventional Resources Technology Conference (URTEC)
... by a weighted least-squares regression of the unknown measured spectrum against a library of known mineral-standard spectra. Chemostratigraphy, as applied here...
2024
Improving the Accuracy of Nuclear Spectroscopy Logs in the Permian Basin by Calibrating Elemental Composition with Mixed-Lithology Core Chemistry
Hernan Mora, Weijun Guo, Yasin Abulaiha, Haijing Wang, Michael Cheshire, Aygul Kostinovsky, Luisa Crousse, Mason Edwards, Bobby Kurniawan
Unconventional Resources Technology Conference (URTEC)
... to the total acquired energy spectrum. A constrained least-squares fitting is applied to compute the elemental yields. The constraints are important...
2025
The American Upper Ordovician Standard. XVII: Areal Variation of Limestone Frequencies in the Kope and Fairview Formations, Hamilton County, Ohio
Robert H. Osborne
Journal of Sedimentary Research (SEPM)
... mathematical complexity which attempt to discern systematic components of areal variation in a given data set by means of least-squares curve fitting...
1973
Rb-sr Whole-rock Geochronology and Clay Mineralogy of the Madera Formation Near Albuquerque, New Mexico
B. Mukhopadhyay , D. G. Brookins
Journal of Sedimentary Research (SEPM)
.... EUGSTER, 1955, Synthetic and natural muscovite: Geochim. Cosmochim. Acta, v. 8, p. 225-280. YORK, D., 1966, Least squares fitting of a straight line: Can...
1976
Landward Migration of Barrier Island Sands Under Stable Sea Level Conditions: Plum Island, Massachusetts
J. Richard Jones, Barry Cameron
Journal of Sedimentary Research (SEPM)
... points as the independent variables with the observations as the dependent variables. Trend analysis uses the method of least squares regression...
1977
Occurrence of Strained Quartz in the Siliceous Frustules of Cultured Freshwater Diatoms
Jay M. Gregg , Susan T. Goldstein , Lester J. Walters, Jr.
Journal of Sedimentary Research (SEPM)
.... Jour. Sci., v. 267-A, p. 114-133. EVANS, W. A., JR., D. E. APPLEMAN, AND D. S. HANWERKER, 1963, The least-squares refinement of crystal unit cells...
1977
Production of Carbonate Sediments by Selected Large Benthic Foraminifera on Two Pacific Coral Reefs
Pamela Hallock
Journal of Sedimentary Research (SEPM)
... for each species were fitted to power function curves of diameter to mass by least squares fit. The resulting equations are presented in Table 1...
1981
Albite of Secondary Origin in Charny Sandstones, QueBec: A Re-evaluation
O. Ogunyomi, R. F. Martin, R. Hesse
Journal of Sedimentary Research (SEPM)
..., indexing and least-squares refinement of powder data: National Tech. Info. Serv., U.S. Dept. Commerce, Document PB 216 188. BOLES, J. R., AND FRANKS...
1981
Variations in Large-Scale Beach Amplitude Along the Coast
Nina Fisher, Robert Dolan, Bruce P. Hayden
Journal of Sedimentary Research (SEPM)
..., sinusoidal curves of differing frequencies are fitted to each series of data points using the least squares method (Rayner 1971). Each...
1984
A Philosophy of Contour Mapping with the Computer: Chapter 1
Thomas A. Jones, David E. Hamilton
AAPG Special Volumes
... processing. However, this decision should be the geologist's, Fig. 4. Diagrammatic cross section showing least-squares grid (dotted line) and weighted-average...
1992
Three-Dimensional Modeling Techniques in the Analysis of a Mature Steam Drive: Chapter 18
Ramsay A. Barrett, Jeffery Bailey
AAPG Special Volumes
...-top grid was built using the minimum-tension algorithm in ISM. This algorithm is similar to least squares and results in a surface with a smooth...
1992
Variations in Density of V-Shaped Impact Pits on Quartz Grains, with Size of Grains, Intertidal Sands, Bay of Fundy
G. V. Middleton, C. A. Kassera
Journal of Sedimentary Research (SEPM)
... density of Vs on those parts of the surface that do show Vs. Figure 1 shows a linear (least-squares) regression of V density on grain size (phi). Closer...
1987
Downstream Changes in Sand Composition, Roundness, and Gravel Size in a Short-headed, High-Gradient Stream, Northwestern Italy
Earle F. McBride, M. Dane Picard
Journal of Sedimentary Research (SEPM)
...) follow a linear exponential trend whose least-squares regression formula is size () = 0.1167 distance (km) - 10.29. The formula has...
1987
Geology and Uranium Geochemistry of the Chinati Mountains Caldera, Trans-Pecos Texas
Joseph C. Cepeda, Christopher D. Henry, Timothy W. Duex
AAPG Special Volumes
... Field Eng. Corp. Final rept. for National Uranium Resource Evaluation, 49 p. Wright, T. L., and P. C. Doherty, 1970, A linear programming and least...
1981
An Integrated Approach to Reservoir Characterization in the Illinois Basin: Multidisciplinary Studies
D. F. Oltz, H. E. Leetaru, B. Seyler, S. T. Whitaker
AAPG Special Volumes
... correlation coefficient (r) of 0.83 (fig. 11). The data exhibit considerable scatter or deviation from the least-squares regression line. More than a 5...
1991
Iron Sulfide and Carbonate Mineral Diagenesis in Baffin Bay, Texas
John W. Morse, Jeffrey C. Cornwell, Takeshi Arakaki, Saulwood Lin, Miguel Huerta-Diaz
Journal of Sedimentary Research (SEPM)
...-corrected CO2 excess in pore waters at site 22. The line is the least squares fit to the data. End_Page 678------------------------ that extensive...
1992