skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Subterranean gravity and other deep hole geophysics

Abstract

The early history of the determination of the Newtonian gravitational constant, G, was closely linked with the developments of geodesy and gravity surveying. The current search for non-Newtonian effects that may provide an experimental guide to unification theories has led to our retracting some of this history. Modern geophysical techniques and facilities, using especially mines and deep ocean probes, permit absolute measurements of G for distance scales up to a few kilometers. Although the accuracy of the very long range determinations cannot equal that of the best laboratory measurements, they are crucial to assessment of the possibility of a scale dependence of G. Preliminary data give values of G on a scale 100-1000 m biased about 1% higher than the laboratory value. Possibilities of systematic error compel us to question this apparently significant bias but it provides the incentive for better controlled large scale experiments. Several are in progress or under development. A particular difficulty concerns the measurement of in situ density. Even for hard rock, release from overburden pressure causes microcracks and pores to open. Natural pore closure is effective only with deep burial and for this reason there are advantages in deep instrument placement for several geophysical studies.

Authors:
Publication Date:
Research Org.:
Univ. of Queensland, Brisbane, Australia
OSTI Identifier:
6415912
Report Number(s):
CONF-820989-
Journal ID: CODEN: APCPC; TRN: 86-003761
Resource Type:
Conference
Resource Relation:
Journal Name: AIP Conf. Proc.; (United States); Journal Volume: 96; Conference: Workshop on science underground, Los Alamos, NM, USA, 27 Sep 1982
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GRAVITATION; FUNDAMENTAL CONSTANTS; BOREHOLES; CLASSICAL MECHANICS; GRAVITATIONAL FIELDS; GRAVITY SURVEYS; POROSITY; ROCKS; SATURATION; STRAINS; STRESSES; UNDERGROUND SPACE; CAVITIES; GEOPHYSICAL SURVEYS; MECHANICS; SPACE; SURVEYS; 657003* - Theoretical & Mathematical Physics- Relativity & Gravitation

Citation Formats

Stacey, F.D. Subterranean gravity and other deep hole geophysics. United States: N. p., 1983. Web.
Stacey, F.D. Subterranean gravity and other deep hole geophysics. United States.
Stacey, F.D. Sat . "Subterranean gravity and other deep hole geophysics". United States.
@article{osti_6415912,
title = {Subterranean gravity and other deep hole geophysics},
author = {Stacey, F.D.},
abstractNote = {The early history of the determination of the Newtonian gravitational constant, G, was closely linked with the developments of geodesy and gravity surveying. The current search for non-Newtonian effects that may provide an experimental guide to unification theories has led to our retracting some of this history. Modern geophysical techniques and facilities, using especially mines and deep ocean probes, permit absolute measurements of G for distance scales up to a few kilometers. Although the accuracy of the very long range determinations cannot equal that of the best laboratory measurements, they are crucial to assessment of the possibility of a scale dependence of G. Preliminary data give values of G on a scale 100-1000 m biased about 1% higher than the laboratory value. Possibilities of systematic error compel us to question this apparently significant bias but it provides the incentive for better controlled large scale experiments. Several are in progress or under development. A particular difficulty concerns the measurement of in situ density. Even for hard rock, release from overburden pressure causes microcracks and pores to open. Natural pore closure is effective only with deep burial and for this reason there are advantages in deep instrument placement for several geophysical studies.},
doi = {},
journal = {AIP Conf. Proc.; (United States)},
number = ,
volume = 96,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1983},
month = {Sat Jan 01 00:00:00 EST 1983}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: