Seismic prospecting

Figure 14.10 illustrates the method of seismic prospecting on land by what is known as reflection shooting. A hole usually 10 to 12 cm in diameter is drilled to a depth of 15 to 30 m. The charge of explosive is likely to be 5 to 12-5 kg and the stemming used is usually water. As the explosive must fire under a depth of water which may exceed 45 m, special varieties of gelatines are employed (see p. 53). Alternatively, a powder explosive can be sealed into pressure-resistant metal containers. Special detonators are also employed, not only to withstand the possible head of water, but also to have a specially short bursting time (see p. 113). [Pg.149]

Noise Vessel propulsion, sonar, seismic prospecting, low-frequency sound use in defense and research May disturb marine mammais and other organisms that use sound for communication. [Pg.770]

Seismograph-Grade Explosives for use in seismic prospecting on land and offshore. Various grades are available in diameters from 2 to 8 inches packaged in fiber cartridges, metal cans, or plastic ... [Pg.69]

Tutamite. One of the Italian Esplosivi per prospezioni geosismiche (Explosives for Geo-seismic Prospecting) is listed by Belgrano (Ref 31, p 334) together with other Italian seismic expls Sismite and Geo-Mon A, without giving their compositions... [Pg.445]

Vulcania DB and DBS. Seismic prospecting expls listed here under Tutamite... [Pg.446]

Geophone. An extremely sensitive electromechanical device used as recording instrument iri seismic prospecting. See in this Vol, under "Exploration for Natural Gas and Oil by Seismic Method , p E358-L to E359-L... [Pg.704]

Louviers Works, built in 1908 at Louviers, Colorado, 20 miles south of Denver, has been supplying expls for gold, silver, uranium, zinc and potash mines also for tunnel construction, seismic prospecting and coalmining. It closed in June 1971... [Pg.465]

DuPont Works, built in 1909 at the village of DuPont, Washington, near Tacoma. It fronts Puget Sound for low-cost shipments to Alaska, Hawaii, the Philippines and some west coast South American ports. The most important outlet of this plant has been, however, to the copper, silver and zinc mines of Idaho and Montana. Expls for quarrying, lumbering, land clearing and seismic prospecting, were also important items... [Pg.465]

An electric cap developed for seismic prospecting is known as " SSS Seismograph Electric Blasting Cap. It is supplied only in No 8 strength (Ref 6, pp90—1)... [Pg.466]

DuPont s Pyrocore. See Ref 7, p9 DuPont s Seismic Prospecting Explosives, such as Seismograph 60% High Velocity" Gelatin Nitramons WW, WW-EL, S Sc S-EL Seismogel A Seismex and Seismex PW (Ref... [Pg.467]

The seismic prospectors first utilized the refraction method, and it had spectacular success in locating salt domes along the Gulf Coast during the period 1923 to 1928. Since 1936, the reflection method has dominated seismic prospecting (pp353—54)... [Pg.501]

Esplosivi geosismici o Esplosivi per pros-pezioni sismicbe(Seismic Prospecting Exp -losives ). See Giorgio (Ref 9, p 179) and Giua (Ref 8, p 405)... [Pg.775]

Geosamer. A seismic prospecting expl listed by Giorgio (Ref 9, P 180) without giving its compn... [Pg.776]

Sismite. A seismic prospective expl mentioned by. Giorgio (Ref 9, p ISO), without giving its compn. Dr Omero Vettori of Aulla (MC) gave its compn as An 48, TNT 32 Tetryi 20% (Vol 3, p C439-R)... [Pg.778]

Some types of work, notably seismic prospecting, require a means of joining dynamite cartridges together to make a continuous column for loading into boreholes. The coupling devices are known as cartridge couplers and the type manufd by the DuPont Co is called Fast-Coupler (Ref 3,p 56)... [Pg.473]

Explosivi per prospezioni geosismiche (Explosives for seismic prospecting) ... [Pg.222]

Principal applications of Detasheet expls include field demolition, underwater explosions, seismic prospecting and metal cutting and hardening. For example, manganese (Hadfield) steel can be hardened by inducing a shock wave in the metal thru detonation of Detasheet placed direcdy on the metal s surface (Ref 5, p 5)... [Pg.523]

It was used for trunk lines and occasionally for branch lines in short drill holes also for trench blasting for pipe lines and to some extent for seismic prospecting... [Pg.526]

Reflection and Refraction Methods. See under Seismic Prospecting in this Vol... [Pg.178]

Sismite. Ital expl used for seismic prospecting. See under Tutamite in Vol 7,1181-L (Italian Explosives and Related Items)... [Pg.341]

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