Wide-angle deep crustal reflections in the northern Appalachians
نویسندگان
چکیده
منابع مشابه
Short Note Crustal Thickness Variations across the Blue Ridge Mountains, Southern Appalachians: An Alternative Procedure for Migrating Wide-Angle Reflection Data
Migration of wide-angle reflections generated by quarry blasts suggests that crustal thickness increases from 38 km beneath the Carolina Terrane to 47–51 km along the southeastern flank of the Blue Ridge. The migration algorithm, developed for generating single-fold images from explosions and earthquakes recorded with isolated, short-aperture arrays, uses the localized slant stack as an interme...
متن کاملDeep crustal structure of the Adare and Northern Basins, Ross Sea, Antarctica, from sonobuoy data
a Seismological Laboratory, California Institute of Technology, 1200 E. California Blvd., MC 252-21, Pasadena, CA 91125, United States b Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, 4th St. SW and Independence Ave., MRC 315, Washington, DC 20013, United States c Scripps Institution of Oceanography, MC 0220, La Jolla, CA 92093, United States d D...
متن کاملInversion of seismic refraction and wide-angle reflection traveltimes for three-dimensional layered crustal structure
We present a method for the determination of crustal structure by simultaneous inversion of seismic refraction and wide-angle reflection traveltimes for 3-D interface geometry and layer velocity. Crustal structure is represented by layers in which velocity varies linearly with depth, separated by smooth interfaces with a cubic B-spline parametrization. Lateral variations in structure are theref...
متن کاملConstraints on plateau architecture and assembly from deep crustal xenoliths, northern Altiplano (SE Peru)
Newly discovered xenoliths within Pliocene and Quaternary intermediate volcanic rocks from southern Peru permit examination of lithospheric processes by which thick crust (60–70 km) and high average elevations (3–4 km) resulted within the Altiplano, the second most extensive orogenic plateau on Earth. The most common petrographic groups of xenoliths studied here are igneous or meta-igneous rock...
متن کاملPliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow
There is considerable controversy over the nature of geophysically recognized low-velocity-high-conductivity zones (LV-HCZs) within the Tibetan crust, and their role in models for the development of the Tibetan Plateau. Here we report petrological and geochemical data on magmas erupted 4.7-0.3 Myr ago in central and northern Tibet, demonstrating that they were generated by partial melting of cr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1987
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1987.tb04406.x