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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,630 documents.
Comparison of Quantitative Mineral Analysis By X-Ray Diffraction and Fourier Transform Infrared Spectroscopy
Paul R. Craddock, Michael M. Herron, Susan L. Herron
Journal of Sedimentary Research (SEPM)
.... Quantitative mineral analysis by FTIR is enabled using a generalized least-squares inversion against a library of mineral standards with unique IR spectra...
2017
Thermal History and Diagenesis of the Wilrich Member Shale, Spirit River Formation, Northwest Alberta
Cathy A. Connolly
CSPG Bulletin
... in the Deep Basin during the epeirogenic uplift subsequent to the Laramide Orogeny is approximately 2000 m. This value is based on the least squares...
1989
Integrating Model Uncertainties in Probabilistic Decline Curve Analysis for Unconventional Oil Production Forecasting
Aojie Hong, Reidar B. Bratvold, Larry W. Lake, Leopoldo M. Ruiz Maraggi
Unconventional Resources Technology Conference (URTEC)
... it appears because the meaning of “best” is not well defined. In many applications, the model that can best fit the data in a least squares sense...
2018
Graphical Techniques for the Analysis and Display of Logging Information: Chapter 2
John H. Doveton
AAPG Special Volumes
... interpretation in hard rock formations: Geobyte, v. 2, no. 3, p. 44-47. Etnyre, L. M., 1984a, Practical application of weighted least squares method...
1994
Direct estimation of fault trajectory from structural relief
Nathan W. Eichelberger, Alan G. Nunns, Richard H. Groshong Jr., and Amanda N. Hughes
AAPG Bulletin
...) and footwall (zf) depths are plotted for comparison. A least-squares regression through the pregrowth horizons gives the displacement (d) and fault depth...
2017
High-Temperature Saline (Thermoflux) Dolomitization of Devonian Swan Hills Platform and Bank Carbonates, Wild River Area, West-Central Alberta
Jack Wendte, Jeffrey J. Dravis,, Lavern D. Stasiuk, Hairuo Qing, Shelley L. O. Moore, Grant Ward
CSPG Bulletin
... versus 18O and F. 87Sr/86Sr versus 13C for both limestone-hosted (LS) and dolostone-hosted (DOL) saddle dolomite (SD) cements. Least squares...
1998
Influence of beach morphodynamics on the distributions of the opheliid polychaete Euzonus sp. and its feeding burrows on a sandy beach: Paleoecological and paleoenvironmental implications for the trace fossil Macaronichnus segregatis
Koji Seike
PALAIOS
... a least squares method, and the resulting R2 and P values were calculated from data from of the Hasaki Coast. A) Foreshore. B) Euzonus sp. C) Feeding...
2009
GEOLOGY OF THE TALLADEGA BELT IN THE HIGHTOWER REENTRANT, CLEBURNE COUNTY, ALABAMA
Denny N. Bearce
Alabama Geological Society
..., v. .12, p. 1-65. Wright, T.L, an Doherty, P.C., 1970 A linear programming and least squares computer method for solving petroWright, T.L, anddDoherty...
1979
Geological Processes and Sedimentation Rates of Wind-Tidal Flats, Laguna Madre, Texas
Robert A. Morton, Charles W. Holmes
GCAGS Transactions
... for 210Pb. The sedimentation rate can be obtained graphically from the mean slope determined by a least-squares best fit. For our analyses, the best-fit...
2009
Geometric Analysis of the Reed Wash Detachment Fold Train, West Flank of San Rafael Swell, Utah.
Vickye R. Velez
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... of the fold train. The best fitting plane for these x-y-z data was found by least-squares regression in which z was considered the dependent variable...
2004
Depositional Sequences And Stratigraphy of the Colón Carbonate Platform: Bocas Del Toro Archipelago, Panama
Donald F. McNeill, James S. Klaus, Laura G. O'Connell, Anthony G. Coates, William A. Morgan
Journal of Sedimentary Research (SEPM)
.... 325– 355. Kirschvink, J.L., 1980, The least-squares line and plane and the analysis of paleomagnetic data: Geophysical Journal International, v. 152...
2013
Pore-Size Dependence of Fluid Phase Behavior and the Impact on Shale Gas Reserves
B. Rahmani Didar, I.Y., Akkutlu
Unconventional Resources Technology Conference (URTEC)
... on this figure was found by least squares fitting and critical pressure was found by using an equation similar to the Antoine’s equation: ln Pc...
2013
BIOGEOGRAPHIC SHELL SHAPE VARIATION IN TROPHON GEVERSIANUS (GASTROPODA: MURICIDAE) ALONG THE SOUTHWESTERN ATLANTIC COAST
MARIANO E. MALVÉ, MARCELO M. RIVADENEIRA, SANDRA GORDILLO
PALAIOS
... resolution, available at http://www.oracle. ugent.be/). The residuals of ordinary least-squares regressions between PC1 and PC2 versus sea surface...
2018
Triassic Remagnetization of Lower Paleozoic Rocks, Bear River Range, Utah-Idaho: A Possible Constraint on Thermal History
Stephen L. Gillett, Michael E. Taylor
Utah Geological Association
... from the Oneonta Dolomite, upper Mississippi River Valley: Journal of Geophysical Research (in press). Kirschvink, J. L., 1980, The least-squares line...
1985
Comparison of Marcellus Fracturing Using Azimuthal Seismic Attributes Versus Published Data From Outcrop Studies
Tanya L. Inks, Terry Engelder, Jacki S. Hocum, Bruce Golob, Darien O'Brien
Unconventional Resources Technology Conference (URTEC)
... in a single direction. RMS Vfast and RMS Vslow are defined by the maximum excursions from the least squares fit curve for azimuthally-varying velocity...
2014
Imaging the Colorado Plateau - Basin and Range Transition Zone Using Basalt Geochemistry, Geochronology and Geographic Information Systems
Reina F. Downing, Eugene I. Smith, Richard L. Orndorff, Terry L. Spell, Kathleen A. Zanetti
Pacific Section of AAPG
... of Geophysical Research, v. 101, p. 17,425-17,445. York, D., 1969, Least squares fitting of a straight line with correlated errors: Earth and Planetary...
2001
Rapid diagenesis and microbial biosignature degradation in spring carbonates from Crystal Geyser, Utah, U.S.A.
Jon Lima-Zaloumis, Jack D. Farmer, Elizabeth Trembath-Reichert
Journal of Sedimentary Research (SEPM)
...). Compositional maps were generated using a classical least-squares (CLS) fitting algorithm in LabSpec6. For this method, two mineralogical endmembers...
2024
Identification and Initial Correlation of Magnetic Reversals in the Lower to Middle Ordovician of Northern Arkansas
M. Randy Farr, Donald R. Sprowl, Jordan Johnson
Special Publications of SEPM
... sections and to the lower to middle St Peter Sandstone in one sec vectors using were cal the least squares I980 RESULTS Demagnetization Behavior...
1993
Magnetostratigraphic, Biostratigraphic, and Lithologic Correlations in Triassic Strata of the Western United States
Maureen B. Steiner, Micheal Morales, Eugene M. Shoemaker
Special Publications of SEPM
... of characteristic tion were determined for each sample by fitting direc magnetiza lines to the demagnetization paths using the least squares...
1993
A One-Dimensional, Two Phase Model of Overpressure Generation in the Venture Gas Field, Offshore Nova Scotia
Brett S. Mudford
CSPG Bulletin
... line represents the least squares regression line used for the permeability-porosity relation in our model. Figure 5. Plot of sandstone porosity versus...
1990
Graphic Correlation of a Frasnian (Upper Devonian) Composite Standard
Gilbert Klapper, William T. Kirchgasser, John F. Baesemann
Special Publications of SEPM
... introduced the technique of graphic corre lation he used is modified form of least squares regression That he favored unequal weighting of biostratigraphic...
1995
Quantifying the Mechanisms Contributing to Surface Relaxation of Protons in Kerogen Pores of Organic-Rich Mudrocks
Saurabh Tandon, Zoya Heidari, Archana Jagadisan
Unconventional Resources Technology Conference (URTEC)
... signal using a least squares curve fitting method (Aster et al. 2005). We used the Inversion recovery with CPMG sequence (Carr and Purcell, 1954; Coates...
2018
Dolomitization of Mississippian Carbonates in the Shell Waterton Gas Field, Southwestern Alberta: Insights from Paleomagnetism, Petrology and Geochemistry
Michael T. Lewchuk,, Ihsan S. Al-Aasm,, David T.A. Symons, Kevin P. Gillen
CSPG Bulletin
... components were obtained using the principal component or least-squares fitting method of Kirschvink (1980). Most components were defined over three or more...
1998
Regional Heat Flow Pattern and Lithospheric Geotherms in Northeastern British Columbia and Adjacent Northwest Territories, Canada
Jacek A. Majorowicz, Alan M. Jessop, Larry S. Lane
CSPG Bulletin
... the least squares fit of the data, forced through the ground temperature (0°C). Temperatures outside the envelope can be considered anomalous (Fig. 4...
2005
Influence of Depositional Environment and Diagenesis on Regional Porosity Trends in the Lower Cretaceous "J" Sandstone, Denver Basin, Colorado
Debra K. Higley, James W. Schmoker
Rocky Mountain Association of Geologists
... depth (Fig. 6). The r for the least-squares fit of the log of porosity to depth is -0.79 for the porosity database and -0.69 for the channel-sandstone...
1989