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Articles 1 - 15 of 15

Full-Text Articles in Physical Sciences and Mathematics

On Porosity Prediction From Seismic Data In Ghawar Field, Saudi Arabia, Thomas M. Loretto Sep 2002

On Porosity Prediction From Seismic Data In Ghawar Field, Saudi Arabia, Thomas M. Loretto

Thomas M Loretto

No abstract provided.


Why Lawyers Should Care, John C. Dernbach Jun 2002

Why Lawyers Should Care, John C. Dernbach

John C. Dernbach

No abstract provided.


On The Feasibility Of Geopressure Detection From Seismic Data In Saudi Arabia., Thomas M. Loretto, James J. Funk Feb 2002

On The Feasibility Of Geopressure Detection From Seismic Data In Saudi Arabia., Thomas M. Loretto, James J. Funk

Thomas M Loretto

No abstract provided.


Cretaceous−Cenozoic History Of The Southern Tan-Lu Fault Zone: Apatite Fission-Track And Structural Constraints From The Dabie Shan (Eastern China), J Grimmer, R Jonckheere, E Enkelmann, L Ratschbacher, B Hacker, Ann Blythe, G Wagner, Q Wue, S Liu, S Dong Dec 2001

Cretaceous−Cenozoic History Of The Southern Tan-Lu Fault Zone: Apatite Fission-Track And Structural Constraints From The Dabie Shan (Eastern China), J Grimmer, R Jonckheere, E Enkelmann, L Ratschbacher, B Hacker, Ann Blythe, G Wagner, Q Wue, S Liu, S Dong

Ann Blythe

Apatite fission-track (AFT) and structural data outline the Late Cretaceous−Cenozoic history of the southern Tan-Lu fault zone (TLFZ), one of Asia's major faults, the Triassic–Jurassic Dabie orogen, Earth's largest track of ultrahigh-pressure rock exposure, and its foreland, the Yangtze foreland fold-thrust belt. The fission-track analyses utilized the independent (φ-), Z- and ξ-methods for age determination, which yielded within error identical ages. Ages from Triassic–Jurassic syn-orogenic foreland sediments are younger than their depositional age and thus were reset. A group of ages records rapid cooling following shallow emplacement of granitoids of the widespread latest Jurassic−Early Cretaceous “Yanshanian” magmatism. Most ages are …


Controls On The Erosion And Geomorphic Evolution Of The San Bernardino And San Gabriel Mountains, Southern California, J Spotila, M House, Ann Blythe, N Niemi, G Bank Dec 2001

Controls On The Erosion And Geomorphic Evolution Of The San Bernardino And San Gabriel Mountains, Southern California, J Spotila, M House, Ann Blythe, N Niemi, G Bank

Ann Blythe

No abstract provided.


Committee On Climate Change And Sustainable Development: 2001 Annual Report, John Dernbach Dec 2001

Committee On Climate Change And Sustainable Development: 2001 Annual Report, John Dernbach

John C. Dernbach

No abstract provided.


Deformation Associated With A Continental Normal Fault System, Western Grand Canyon, Arizona, Phillip Resor, David Pollard Dec 2001

Deformation Associated With A Continental Normal Fault System, Western Grand Canyon, Arizona, Phillip Resor, David Pollard

Phillip G Resor

In the western Grand Canyon, the Colorado River cuts through a series of moderate offset normal faults that mark the transition between the Colorado Plateau and the Basin and Range tectonic provinces. Both hanging wall and footwall rocks are exposed over > 1,000 m of vertical section, and contain relatively simple pre-existing structures. The area thus presents an opportunity to investigate processes of continental extension without cross-cutting fault patterns and large rotations typical of much of the Basin and Range. We have mapped 8 km of the Froggy Fault, including ~ 600 m of vertical section, and deformed strata of the …


Low-Temperature Thermochronology Of The San Gabriel And San Bernardino Mountains, Southern California: Constraining Structural Evolution, Ann Blythe, M House, J Spotila Dec 2001

Low-Temperature Thermochronology Of The San Gabriel And San Bernardino Mountains, Southern California: Constraining Structural Evolution, Ann Blythe, M House, J Spotila

Ann Blythe

No abstract provided.


Slip Inversion On Complex Fault Surfaces Using Angular Elastic Dislocations, Phillip Resor, L Maerten, F Maerten Dec 2001

Slip Inversion On Complex Fault Surfaces Using Angular Elastic Dislocations, Phillip Resor, L Maerten, F Maerten

Phillip G Resor

We present a new 3D slip-inversion method based on the analytical solution of an angular dislocation in a linear-elastic, homogeneous, isotropic, whole- or half-space. The approach uses a boundary element method (BEM) that employs planar triangular elements of constant displacement to model fault surfaces. Discretization of surfaces into triangular boundary elements allows the construction of complex 3D fault surfaces with irregular tipline and no overlaps or gaps. A damped least squares method is used to minimize the functional ¶llel.b-d∥2+ɛ^{2}∥ bigtriangledown .b∥ ^{2},where b represents the slip distribution on the faults, φ the influence coefficient matrix and d the observed deformation …


International Supplement To Graptolite Macroevolution: Phylogenetic Analysis And Testing Hypotheses Of Directional Change, Daniel Goldman Dec 2001

International Supplement To Graptolite Macroevolution: Phylogenetic Analysis And Testing Hypotheses Of Directional Change, Daniel Goldman

Daniel Goldman

Funding agency: National Science Foundation Amount: $12,058.00 Year: 2002/2 yrs.


Wide Plate Margin Deformation, Southern Central America And Northwestern South America, Casa Gps Observations, James Kellogg Dec 2001

Wide Plate Margin Deformation, Southern Central America And Northwestern South America, Casa Gps Observations, James Kellogg

James N Kellogg

Global Positioning System (GPS) data from southern Central America and northwestern South America were collected during 1991, 1994, 1996, and 1998 in Costa Rica, Panama, Ecuador, Colombia and Venezuela. These data reveal wide plate boundary deformation and escape tectonics occurring along an approximately 1400 km length of the North Andes; locking of the subducting Nazca plate and strain accumulation in the Ecuador-Colombia forearc; ongoing collision of the Panama arc and Colombia; and convergence of the Caribbean plate with Panama and South America. Elastic modeling of observed horizontal displacements in the Ecuador forearc is consistent with partial locking (50%) in the …


Sustainable Versus Unsustainable Propositions, John Dernbach Dec 2001

Sustainable Versus Unsustainable Propositions, John Dernbach

John C. Dernbach

No abstract provided.


Targets, Timetables And Effective Implementing Mechanisms: Necessary Building Blocks For Sustainable Development, John C. Dernbach Dec 2001

Targets, Timetables And Effective Implementing Mechanisms: Necessary Building Blocks For Sustainable Development, John C. Dernbach

John C. Dernbach

No abstract provided.


An Experimental Study Of Grain Scale Melt Segregation Mechanisms In Two Common Crustal Rock Types, Caleb W. Holyoke Iii, Tracy Rushmer Dec 2001

An Experimental Study Of Grain Scale Melt Segregation Mechanisms In Two Common Crustal Rock Types, Caleb W. Holyoke Iii, Tracy Rushmer

Caleb Holyoke

No abstract provided.


Sustainable Development: Now More Than Ever, John C. Dernbach Dec 2001

Sustainable Development: Now More Than Ever, John C. Dernbach

John C. Dernbach

This Article explains how and why sustainable development emerged as a conceptual framework, the basic concepts or principles on which this framework is based, why sustainability is primarily a matter for domestic national governance, and why the United States needs to play a leading role in fostering sustainable development. Because "sustainable" modifies "development," it is first important to understand what development means. Since the end of World War II, development has included at least four related elements: peace and security, economic development, social development, and supportive national governance. Each element is reflected in major multilateral treaties that provide a common …