Advances and Challenges in the Development and Deployment of Gravity Gradiometer Systems

DiFrancesco, Dan

doi:10.3997/2214-4609-pdb.166.c_op_02

Cited by 17 publications

(7 citation statements)

References 1 publication

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“…The Company completed 30,506 km 2 Full Tensor Gravity Gradiometry survey in southern and central main Ethiopian Rift valley basins block ( Africa Oil Corp 2013a ). Data was acquired using a full tensor FTGeX gravity gradiometry system from Lockheed-Martin with a Resolution or target sensitivity of 1E/√Hz ( Difrancesco 2007 ). The FTGeX instrument also includes direct measurement of the vertical gravity signal via the Gravity Measurement Assembly (GMA).…”

Section: Gravity Data and Data Processingmentioning

confidence: 99%

Processing and interpretation of full tensor gravity anomalies of Southern Main Ethiopian Rift

Kebede

Mammo

2021

Heliyon

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The study area is situated in the Southern Main Ethiopian Rift being bounded within the limit of 37 o 00″0′-38 o 50′00″E and 5 o 50′00″-7 o 00′00″N. It is well known that the complex geological structure of the Main Ethiopian Rift has attracted intense attention so far and numerous geophysical investigations have been performed using potential field data-sets in Central and Northern Main Ethiopian Rift with the exception of the Southern Main Ethiopian Rift which is poorly constrained. Analysis of Full Tensor Gravity anomalies helps in understanding of the nature of shallow subsurface structural features and has a paramount importance in building general understanding of subtle details about subsurface geology of the area. Separation of regional and residual gravity field is performed using upward continuation filtering technique. The residual gravity anomaly caused by local structures and anomalous body delineated four sub-basins with low amplitude response which is in agreement with the vertical gravity gradient anomaly (G zz ) and tilt derivative horizontal (TDX) that clearly outlined and characterize edges of the sub-basins. The sub-basins delineated are the northern and southern Abaya, Chamo and Gelana basins. The tilt angle method which is used to delineate major subsurface structures and determine the source depth results showed that the area was affected by different lineament trending NE-SW, N–S, NNE-SSW, NW-SE and E-W, directional analysis performed indicates that the dominant trend is in agreement with the regional fault orientations. The estimated depth to the top of the lineaments on average varies from 0.9 km to 3.1 km and it is relatively deeper in the basins compared to the surrounding areas giving clues to the amount of sediment infill.

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Section: Gravity Data and Data Processingmentioning

confidence: 99%

Processing and interpretation of full tensor gravity anomalies of Southern Main Ethiopian Rift

Kebede

Mammo

2021

Heliyon

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“…And, MEMS (microelectromechanical systems) technology is being applied to the manufacture of miniature gradiometers (Flokstra et al 2009). The reader is referred also to the review by Difrancesco (2007).…”

Section: Gradiometrymentioning

confidence: 99%

Gravity, Gradiometry

Jekeli¹

2020

Encyclopedia of Earth Sciences Series

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Definition and Scope Gravity gradiometry encompasses all manners of measuring the spatial gradients of the gravity vector field. In a broader sense, it includes the techniques for developing and applying gradient models, from both analytic and numerical perspectives, in order to validate gradient sensors, to study geologic bodies, and to test physical theories. Gravity gradiometry has a long and varied history of static (ground-based), shipborne, airborne, and spaceborne measurement systems. This entry includes the mathematical foundations and properties of gradients starting with Newton's law of gravitation. A description of straightforward modeling is followed by a rudimentary measurement error analysis; and the entry concludes with a comprehensive account of measurement systems, as well as some sample applications.

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“…The study of these anomalies forms the basis of the gravity discipline in Geophysics (see Gravity, Data to Anomalies). The gravity field which forms these anomalies is measured with extremely sensitive gravimeters and today detected also with gradiometers (Götze and Pail 2018;Difrancesco 2007). The effect of topography and other known factors (see below) is subtracted from the observations.…”

Section: Newton's Law and Newtonian Potentialmentioning

confidence: 99%

Gravity Method, Principles

Götze¹

2019

Encyclopedia of Solid Earth Geophysics

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Gravimetry methods; Gravity and figure of the Earth Definition Gravity methods focus on the determination of the gravitational field of the Earth's body and its anomalies and shape (determination of the figure of the Earth). The figure of the planet is essentially characterized by two forces: attraction and centrifugal force. Gravitation is a general property of all matter and is independent of the chemical composition of mass particles. The mathematical description of the gravitational field goes back to Sir I. Newton. The article describes the formulation of the law, the ambiguity in the interpretation, as well as the problems with the inversion of measured gravitational fields.

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Advances and Challenges in the Development and Deployment of Gravity Gradiometer Systems

Cited by 17 publications

References 1 publication

Processing and interpretation of full tensor gravity anomalies of Southern Main Ethiopian Rift

Processing and interpretation of full tensor gravity anomalies of Southern Main Ethiopian Rift

Gravity, Gradiometry

Gravity Method, Principles

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