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Saturday, August 15, 2020 | History

4 edition of Seismic refraction data across the Coast Range and Willamette basin in central Oregon found in the catalog.

Seismic refraction data across the Coast Range and Willamette basin in central Oregon

Seismic refraction data across the Coast Range and Willamette basin in central Oregon

the 1991 Pacific Northwest Experiment

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Published by U.S. Dept. of the Interior, U.S. Geological Survey, Books and Open-File Reports Section, distributor] in Menlo Park, Calif, [Denver, Colo .
Written in English

    Subjects:
  • Earthquake hazard analysis -- Northwest, Pacific,
  • Seismic refraction method,
  • Subduction zones -- Northwest, Pacific

  • Edition Notes

    Statementby Anne Trehu ... [et al.]
    SeriesOpen-file report -- 93-319, U.S. Geological Survey open-file report -- 93-319
    ContributionsTréhu, Anne Martine, Geological Survey (U.S.)
    The Physical Object
    FormatMicroform
    Pagination31 p.
    Number of Pages31
    ID Numbers
    Open LibraryOL14450291M
    OCLC/WorldCa30712686

    U.S. Geological Survey water-quality data in the Willamette Basin, Oregon, Discharge in the lower Columbia River basin, Patterns of runoff in the Willamette Basin, Oregon. Surface water records and precipitation records of Oregon; water year. Regionalized flood frequency data for Oregon Seismic Refraction Theory 11 Recent Practice in Seismic Refraction Surveys 15 Field procedure 15 Data processing 16 Geology of the Ames-Roland Area 21 PROCEDURE 28 Data Collection 2 8 Instrumentation 28 Field procedure 34 Data Processing 37 SEISMIC RESULTS AND INTERPRETATION 42 The Simplified Seismic Model

    About the Author(s) Henry Lyatsky is a Calgary-based consultant who has worked across western and northern Canada and internationally in hydrocarbon and mineral exploration. He was born in St. Petersburg, Russia and moved to Calgary as a teenager. He holds a in geology and geophysics (, University of Calgary), an in geophysics (, University of Calgary) and a Ph.D. in. The Program for the Array Seismic Studies of the Continental Lithosphere (PASSCAL) is another one of the four major componenets of IRIS. PASSCAL operates a pool of over portable seismic instruments to record active source reflection data, active source refraction data or .

    The concept of a seismic investigation of the crust beneath the Arabian Precambrian Shield was first formulated by the USGS/DGMR geophysics group more than three years ago. The refraction profile extends for about km across the eastern and southern parts of the shield, more or less normal to first-order structural boundaries (fig. 1). A seismic refraction study of the north basin of the Dead Sea, Israel Avihu Ginzburg and Zvi Ben-Awaham Tel Aviv University, Ramat Aviv, Israel Abstract. A seismic refraotion experiment involving the use of 90BS and 11 portable seismic land stations was conducted along a profile in the north basin of the Dead Sea. The seis-.


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Seismic refraction data across the Coast Range and Willamette basin in central Oregon Download PDF EPUB FB2

PDF | On Jan 1,Anne Martine Trehu and others published Seismic refraction data across the Coast Range and Willamette basin in central Oregon; the Pacific Northwest Experiment | Find.

Get this from a library. Seismic refraction data across the Coast Range and Willamette basin in central Oregon: the Pacific Northwest Experiment. [Anne Martine Tréhu;]. Seismic refraction data across the Coast Range and Willamette basin in central Oregon; the Pacific Northwest Experiment Technical Report Full-text available.

Oregon's Willamette Valley is a tectonic forearc basin on the convergent margin of the northwestern United States, dividing an uplifted subduction complex of the Coast Range from active andesitic.

correlative reflector were traced on seismic pro-files throughout the central and northern Oregon margin to produce a structure contour map. A proprietary data set of multichannel migrated seismic reflection profiles used for the map was collected in two acquisition phases: (1)channel, and (2)channel, which form a.

Inthe USGS began a project using deep seismic reflection profiling and detailed refraction surveys to trace the Coast Range thrust eastward to depth.

Initial results presented by Wentworth et al. (, as cited in Wentworth et al. ) suggested that tectonic wedging, rather than subduction, seems to be the dominant tectonic style at. Seismic-refraction data were recorded in along a line from Lake Shasta (Fig.

2) southeastward through the southern Cascade Range and northern Sierra Nevada provinces to Mono Lake, on the east edge of the Sierra Nevada (Roller anc.

others, ; Roller and Gibbs, ). 1 Introduction to seismic data and processing Chapter contents Seismic data and their acquisition, processing, and interpretation Sampled time series, sampling rate, and aliasing Seismic amplitude and gain control Phase and Hilbert transforms Data format and quality control (QC) Summary Further reading.

The eruption of camptonite flows and intrusion of nepheline syenite in the central Oregon Coast Range at Ma were approximately contemporaneous with the eruption of the Cascade Head volcanics at Ma, and the flows appear to be lesser partial melts of the Cascade Head and Yachats sources (Oxford, ; Parker et al., ).

seismic refraction lines, oil industry boreholes, balanced cross sections, and other tomography models that reveal the basin is locally at least km thick [ Meltzer et al. Seismic velocities in saturated basin fill range from about 5, ft/s to 8, ft/s depending on the depth and induration of the basin-fill deposits.

The velocity increase resulting from saturation allows the refraction method to be generally successful in determining the depth to the water table. Data from the Coast Range ophiolite and its tectonic outliers in the northern California Coast Ranges suggest that the lower part of the ophiolite formed to Ma in a forearc or back arc.

points belong to three different refraction lines traversing northern and central Death Valley (Figure 1). This report presents the shallow refraction data and its interpretation.

DESCRIPTION OF SURVEY Two Bison refraction systems were used to collect the data, the and the B, six and one channel models respectively. Prior to this study, no crustal-scale seismic refraction data were available for the western Cascades margin and Puget Lowland.

Crosson [ ] estimated the crustal velocity structure beneath the Puget Sound basin from the inversion of local earthquake travel time data and obtained a crustal thickness of 41 km with a Pn veloc- ity of km s The Tualatin basin, west of Portland (Oregon, USA), is one of several structural basins within the Puget-Willamette lowland, a km-long structural and topographic trough between the Coast Range and Cascade volcanic arc ().The Puget-Willamette lowland is seismically active and home to most of the Oregon and Washington State populations and major cities.

Reflection seismic data are acquired in the same manner as refraction data but the processing is considerably different.

In reflection seismology, seismic records from many sets of A seismic section from the northern Amadeus basin, central Australia, illustrating a depositional sequence bounded by major unconformities. The black model contains no mid-crustal (Conrad) discontinuity and the red contains a Conrad discontinuity.

(a) Modeling results for the profile across central Oregon, with at left and middle the Coastal ranges and at right the Willamette Basin. (b) Same analysis performed on the data from the Klamath province (northern California).

The seismic refraction method requires three components: a controlled shot of seismic energy (source), sensors to receive the energy (geophones), and a central data recorder (seismograph) connected via radio links or cabling.

The transmitted energy is recorded at each geophone along the seismic line. A hammer blow or explosive charge (the shot. The depth to mantle is at least 22 km near the crestal zone and perhaps even greater below the crest where comparatively shorter range profiles did not determine it.

Additional measurements between two large seamounts of the Emperor seamount chain, on the eastern flank of a low rise in the basin floor, also indicate two layers within layer 2.

Abstract. Eleven in-line refraction profiles, recorded to distances of km, and one azimuthal fan plot were constructed from data recorded with a station array in the Yellowstone National Park area during the Yellowstone-Snake River Plain seismic experiment.

A search for seismic reflection data using the Marine Trackline Geophysics database will determine what data exist in a region. Digital data, and scanned images of former analog data, submitted with digital navigation are directly downloadable from searches.

For assistance, or to obtain data not available for download, please contact.Seismic refraction developed to locate artillery guns by measurement of recoil. ‘Seismos’ company founded to use seismic refraction to map salt domes, often associated with hydrocarbon traps.

Practical seismic reflection methods developed. Within 10 years, the dominant method of hydrocarbon exploration.6. Data processing should be guided by the appearance of the field records and extreme care should be used not to stack refractions or other unwanted artifacts as reflections.

Subbottom Profiling. A variant of seismic reflection used at the surface of water bodies is subbottom profiling or imaging.