Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Sigmund Hammer"'
Autor:
Sigmund Hammer
Publikováno v:
GEOPHYSICS. 39:205-222
Rigorous calculation of gravity effects of geologic bodies for the interpretation of subsurface structure from exploration gravity surveys is time‐consuming and tedious. Resort to electronic computers is convenient but not always necessary. Simple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ba5abb1b95ee760ed1aba55064c851c
https://doi.org/10.1190/1.1440422
https://doi.org/10.1190/1.1440422
Autor:
Sigmund Hammer
Publikováno v:
GEOPHYSICS. 42:60-65
Very serious distortions in both magnitude and extension of local gravity anomalies result from the still widely used 9-point “residual” and 17-point “second derivative” graticules. Although these types of residual maps are very useful for re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6d66166bc41a543cac54ad907ae34a3
https://doi.org/10.1190/1.1440714
https://doi.org/10.1190/1.1440714
Autor:
Sigmund Hammer
Publikováno v:
GEOPHYSICS. 41:1346-1352
Progress in airborne gradiometer instrumentation has advanced to the point that procedures for determining corrections for the variable effects of topography merit consideration. An approximate practical method, based on real‐time recording of flig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11e00213f4e6ea4b759a0bab04029e32
https://doi.org/10.1190/1.1440684
https://doi.org/10.1190/1.1440684
Autor:
Sigmund Hammer
Publikováno v:
GEOPHYSICS. 39:537-542
A simple, convenient procedure is outlined for evaluating topographic and terrain effects in airborne gravimetry. The method assumes that continuous terrain data (flight elevation and terrain clearance) are available along a traverse. The terrain is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cec299fedb8e19d4e0882baad9843033
https://doi.org/10.1190/1.1440445
https://doi.org/10.1190/1.1440445
Autor:
Sigmund Hammer
Publikováno v:
GEOPHYSICS. 48:396-399
Terrain corrections for airborne gravity surveying have been a cause of some concern in the exploration industry (Hammer, 1974). Some skepticism still persists that the problem may be troublesome. As a matter of fact, an essential feature of the pres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea5d609bc598261d4d29e0429cddc87e
https://doi.org/10.1190/1.1441478
https://doi.org/10.1190/1.1441478
Autor:
Sigmund Hammer, Rodolfo Anzoleaga
Publikováno v:
GEOPHYSICS. 40:256-268
The vast and growing literature on the search for stratigraphic traps for petroleum ignores gravity gradients, for which the theory has been available since the heyday of the Eötvös torsion balance decades ago. These are discussed in this paper. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7467ac025fb8b16d1f045830a0dfc496
https://doi.org/10.1190/1.1440523
https://doi.org/10.1190/1.1440523
Autor:
Sigmund Hammer
Publikováno v:
GEOPHYSICS. 8:57-60
The various physical factors constituting the increase in the normal acceleration of gravity of the earth from equator to pole are analyzed mathematically. The magnitudes of the essential factors are (1) centripetal acceleration +3.39 gals, (2) decre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0974e9c5dcc63485f4f863efc235bf9b
https://doi.org/10.1190/1.1445031
https://doi.org/10.1190/1.1445031
Autor:
Sigmund Hammer
Publikováno v:
GEOPHYSICS. 17:435-440
The oil industry throughout the world last year invested about $325,000,000 in geophysical exploration for oil. This marks a phenomenal growth of the science since its inception less than three decades ago. The commercial acceptance of geophysics is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4172b856133394fd848646db4ee9dc06
https://doi.org/10.1190/1.1437769
https://doi.org/10.1190/1.1437769
Publikováno v:
GEOPHYSICS. 10:34-49
As a contribution to the War Production Board’s program of exploration for strategic minerals and under an arrangement with the Bethlehem Steel Company, Gulf Research & Development Company, in early 1942, made gravimeter surveys in the chromite bea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23794fe48b061d9ff73159f919ff90c6
https://doi.org/10.1190/1.1437146
https://doi.org/10.1190/1.1437146
Autor:
Sigmund Hammer
Publikováno v:
GEOPHYSICS. 20:654-670
Geophysical activity in explorations for petroleum on a global scale in 1954 was 6.3% lower than the record high of 1953. Notable increases in geophysical effort in Europe, the Middle East, and the Far East were not sufficient to overcome the very su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39b75d307d720cdf61cc435d52bf5944
https://doi.org/10.1190/1.1438171
https://doi.org/10.1190/1.1438171