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The AAPG/Datapages Combined Publications Database
Showing 440 Results. Searched 195,387 documents.
Principal Stress Estimation in Shale Plays Using 3D Seismic, #50416 (2011)
Ron Schmid, David Gray
Search and Discovery.com
...) approximation of Hooke’s Law can be estimated using either birefringence or azimuthal analysis of multi-component seismic data, or from azimuthal...
2011
Chapter 2 - Grains: Feldspars
Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine
AAPG Special Volumes
...: Varies systematically with composition. Birefringence: First-order gray and white in a 30-μm section, except for calcic compositions which may go up...
2014
Cements: PART 2
AAPG Special Volumes
... but with crossed polarizers. Note high birefringence of the authigenic, grain-coating clay films. X-ray diffraction analyses have shown that smectite is the major...
1979
Gas Occurrence in the Caney Shale, Part 2, Conclusion
Tyler J. Maughan, David Deming
Oklahoma City Geological Society
... type color. The shale minerals do exhibit a weak pleochroism in PPO, and some colorful birefringence in cross polarized light (CPO). I did find three...
2007
Minerals of Sespe Formation, California, and Their Bearing on Its Origin
Vincent P. Gianella
AAPG Bulletin
... tetragonal crystals, parallel extinction, high relief, and extreme birefringence. Glaucophane: A few grains of glaucophane are present in each mount...
1928
Abstract: Re-examination of the origin of quartz-augen schist in light of recent investigations at the Brunswick No. 12 sulphide deposit, Bathurst base-metal camp, Bathurst, New Brunswick
D. R. Lentz, W. D. Goodfellow, S. J. Juras
Atlantic Geology
... of the phenocrysts. Coarse-grained turbid alkali feldspar and quartz phenocrysts hosted in a very fine-grained matrix of sericite, chlorite (brown birefringence...
1992
Detrital Minerals Derived from Recent Volcanics in Northwestern Chihuahua, Mexico
Raymond Sidwell, Charles A. Renfroe
Journal of Sedimentary Research (SEPM)
... crystals and long acicular crystals with strong birefringence are common. Euhedral quartz crystals occur as inclusions within chalcedony and also...
1943
Recognition of Interstitial Anhydrite Dissolution: A Cause of Secondary Porosity, San Andres Limestone, New Mexico, and Upper Minnelusa Formation, Wyoming
Christopher J. Schenk, Randall W. Richardson
AAPG Bulletin
... irregular. Normally, birefringence coloration zones parallel the even thinning on euhedral crystal edges, but we observed embayments of these color bands...
1985
The Correlative Value of the Heavy Minerals
F. G. Tickell
AAPG Bulletin
.... In the study of thin sections much attention is paid to the determination of birefringence of the minerals. This is possible because all are cut to one...
1924
PETROGRAPHY AND PETROLOGY OF A MIOCENE (?) TUFF, LAS VEGAS RANGE, CLARK COUNTY, NEVADA
Michael S. Manholt
Rocky Mountain Association of Geologists
...-green to dark green. Opaques: 2% Anhedral-subhedral, equant (0.3 mm). ACCESSOR Y MINERALS: Sphene: Subhedral(0.3 mm), high birefringence. Quartz...
1983
Petrography of Till from Northeastern Ohio and Northwestern Pennsylvania
Robert F. Sitler
Journal of Sedimentary Research (SEPM)
... be distinguished from hornblende by its nearly parallel extinction, high birefringence, and pleochroism. Some grains of actinolite have been identified...
1963
Authigenic Tourmalines from the Lower Kaladgi Sandstones Jamkhandi, Mysore State: NOTES
B. V. Govinda Rajulu, H. R. Nagaraja
Journal of Sedimentary Research (SEPM)
... relief. There is marked variation in the dichroism between the host and the new growth (fig. 6, 10, 12). Based on this dichroism and birefringence...
1969
The Petrology of a Glauconitic Sandy Chalk
R. J. Bailey, M.P. Atherton
Journal of Sedimentary Research (SEPM)
... the other varieties by their deeper, more uniform, color and higher birefringence. The distinction between the pale green and variegated pellets is, however...
1969
Separation of Quartz and Feldspars from Mudrocks: RESEARCH-METHOD PAPER
Harvey Blatt, Richard L. Jones, Raymond G. Charles
Journal of Sedimentary Research (SEPM)
... have been used since the time of Sorby. The quartz and feldspar grains in mudrocks are of silt size, have low birefringence, and the feldspars...
1982
Abstract: An Overview of Seismic Fracture Prediction, by Enru Liu, Rishi Bansal, Xin Zhan, Alex Martinez, and Chris Harris; #120034 (2012)
Search and Discovery.com
2012
Abstract: Principle Stress Estimation in Shale Plays using 3D Seismic; #90172 (2014)
David Gray, Paul Anderson, John Logel, Franck Delbecq, Darren Schmidt
Search and Discovery.com
... be estimated using either birefringence or azimuthal analysis of multi-component seismic data, or from azimuthal velocity and AVO analysis...
2014
3-D seismic Data in Delineating Productive Ismay Algal Mounds in Southern Paradox Basin, Utah, By, R.O. Louden, D.D. Lehman, W.E. Johnson and D.L. Edwards, Search and Discovery Article #40048 (2002)
Search and Discovery.com
2002
EVALUATION AND GEOLOGY OF KAOLINIZED SEDIMENTS, WOOD MOUNTAIN, SASKATCHEWAN
P.P. MASTER
Saskatchewan Geological Society
... and birefringence. Orthoclase was identified by perthitic texture, clouding (with kaolin?) and minimal twinning. Oligoclase was identified...
1987
The Petrology of Some Des Moines Series Sandstones of Iowa
Robey Harned Clark
Journal of Sedimentary Research (SEPM)
.... Gradational differences in birefringence make varietal differentiation on this basis difficult. The variety of form, color, zoning, and degree...
1950
Chapter 18 - Diagenesis: Other Cements
Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine
AAPG Special Volumes
... peloids or “pellets”. The detrital phosphate grains are completely isotropic or have extremely low birefringence. The extensive phosphatic cement...
2014
Altered Paleozoic Volcanic Materials and Their Recognition
Clarence S. Ross
AAPG Bulletin
... phenocrysts in the volcanic glass. * * * The characteristic clay-like mineral has a micaceous habit and facile cleavage, high birefringence, and a texture...
1928
Petrology of Paleocene-Eocene and Miocene Opaline Sediments, Southeastern Atlantic Coastal Plain
Robert E. Carver
Journal of Sedimentary Research (SEPM)
... comparable to the structure shown in Figure 3B. Opal from the Altamaha Grit shows a faint birefringence of the kind that would be produced by very small...
1980
Chapter 5 - Grains: Miscellaneous Detrital Grains & Associated Rock Types
Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine
AAPG Special Volumes
.... Carbonate grains have a wide variety of shapes and internal structures, but all show high birefringence. Carbonate rocks, limestones and dolomites...
2014
Petrography of Some Subsurface Igneous Rocks of Mississippi
Danny W. Harrelson, Alvin R. Bicker, Jr.
GCAGS Transactions
... to euhedral phenocrysts (0.1-0.7 mm) with a high 2V. The slightly elongate laths have a low first order gray birefringence and are moderately altered...
1979
Marine Multicomponent Seismic – The New Issues in the Developing Revolution
Jason Robinson
Indonesian Petroleum Association
...., Lynn, H., and Vetri, L., 2001. PS-wave birefringence analysis at the Emilio field for fracture characterizatio. 63rd EAGE Conf. and Tech. Exhibit...
2002