scholarly journals Assessment of Gas Hydrate Resources in Ross Sea Area, Antarctica Based on Inversion of Gravity and Magnetic Data

2021 ◽  
Author(s):  
wei Wang ◽  
meng Wan ◽  
miaojun Sun ◽  
weijie Jiang ◽  
ping Xu
Keyword(s):  
Heat Flow ◽  
High Precision ◽  
Gas Hydrate ◽  
Ross Sea ◽  
Magnetic Data ◽  
Moho Depth ◽  
Gravity And Magnetic ◽  
Curie Depth ◽  
Sea Area ◽  
Gravity And Magnetic Data

Abstract The Ross Sea is located between Victoria Land and Mary Bird Land in West Antarctica. In this paper, the published gravity and magnetic data in the Ross Sea area are fused with the high-precision gravity and magnetic data measured by the ship. Then, The gravity anomaly data is used to invert the Moho depth by the Parker-Oldenburg method; the magnetic anomaly data is used to invert the Curie depth of the Ross Sea area by the power spectrum method. Finally, according to the inversion results of the Moho depth and Curie depth, the high-precision heat flow distribution in the Ross Sea area is calculated. And compared with the actual measured heat flow value and other inversion results, it shows that this inversion result has obtained a higher resolution. At the same time, the geothermal gradient is calculated by heat flow and thermal conductivity. According to the temperature-pressure equation for formation and storage of gas hydrate, the thickness of the gas hydrate stability zone in the study area was quantitatively calculated.

scholarly journals Assessment of Gas Hydrate Resources in Ross Sea Area, Antarctica Based on Inversion of Gravity and Magnetic Data

2020 ◽  
Author(s):  
Wei Wang ◽  
Meng Wan ◽  
Miaojun Sun ◽  
Weijie Jiang ◽  
Ping Xu ◽  
...  
Keyword(s):  
Heat Flow ◽  
Gas Hydrate ◽  
Ross Sea ◽  
Thermal Structure ◽  
Magnetic Data ◽  
Moho Depth ◽  
Structure Information ◽  
Curie Depth ◽  
Pacific Side ◽  
Sea Area

Abstract Ross Sea is a large bay located in the fan-shaped area on the Pacific side of Antarctica. In this paper, the power spectrum method is used to invert the Curie depth of the Ross Sea area by(through) the magnetic anomaly data; the Parker-Oldenburg method is used to invert the moho depth; according to Curie depth and the moho depth, the heat flow of the Ross Sea area is inverted, obtained high-precision thermal structure information. According to the temperature-pressure equation for formation and storage of gas hydrate, the thickness of the gas hydrate stability zone is quantitatively calculated based on the heat flow data of the study area, and a integral method is used to estimate the resource prospects of gas hydrate in this area. The results show that the estimated volumes of gas hydrate resources in the Ross Sea are 2.77×1011 m3.

Composition of the Uralide crust from seismic velocity ( V p , V s ), heat flow, gravity, and magnetic data

2003 ◽  
Vol 210 (1-2) ◽  
pp. 333-349 ◽  
Author(s):  
D. Brown ◽  
R. Carbonell ◽  
I. Kukkonen ◽  
C. Ayala ◽  
I. Golovanova
Keyword(s):  
Heat Flow ◽  
Seismic Velocity ◽  
Magnetic Data ◽  
Gravity And Magnetic ◽  
Gravity And Magnetic Data

GRAVITY AND MAGNETIC CALCULATIONS

Geophysics ◽  
1942 ◽  
Vol 7 (3) ◽  
pp. 293-310 ◽  
Author(s):  
L. L. Nettleton
Keyword(s):  
High Precision ◽  
Geophysical Data ◽  
Magnetic Data ◽  
Accurate Calculation ◽  
Magnetic Effects ◽  
Actual Application ◽  
Methods Of Calculation ◽  
Gravity And Magnetic ◽  
Gravity And Magnetic Data

In the earlier geophysical literature, many schemes were published for the calculation of gravity and magnetic effects. For the most part these were either the curves for the effects of certain definite geometric bodies or various charts and diagrams by which the effects for a body of any shape could be determined graphically. It is probable that these schemes have had comparatively little actual application in the interpretation of magnetic and gravity surveys. This is because of the fact that unless certain controls other than the gravity and magnetic data are available the inherent ambiguities of the physically possible distributions of material which can produce the observed effects make an accurate calculation meaningless, even though the geophysical data may be of any desired precision. Furthermore, it is often possible to calculate, from rather generalized forms, geophysical effects which are in agreement with those observed within the precision of the observations. In fact, unless two conditions are fulfilled, i.e., (1) observed data are of high precision and spaced at distances substantially less than the horizontal dimensions or depth of the disturbing body, and (2) some other control is available, there is little point to using any of the more refined methods of calculation.

Gravity, magnetics and geothermal heat flow of the Antarctic lithospheric crust and mantle

2021 ◽  
pp. M56-2020-5
Author(s):  
Folker Pappa ◽  
Jörg Ebbing
Keyword(s):  
Heat Flow ◽  
Gravity Data ◽  
Magnetic Data ◽  
Geothermal Heat ◽  
Satellite Gravity ◽  
Gravity And Magnetic ◽  
Magnetic Analysis ◽  
Gravity And Magnetic Data ◽  
The Antarctic ◽  
Broad Scale

AbstractThis chapter describes the application and coverage of gravity and magnetic data for Antarctica with emphasis on airborne and satellite models. Low resolution satellite data help to fill gaps between high-resolution airborne data. Satellite gravity data are best used to study broad-scale lithospheric architecture while airborne data, especially magnetic data, provide finer detail. We review examples of gravity and magnetic analysis and describe the possibilities and pitfalls for estimating the properties of the lithosphere as it relates to the mantle. This is followed by a discussion on geothermal heat flow and possible ways to combine different geophysical and petrological models for a better understanding of the Antarctic mantle.

Moho depth derived from gravity and magnetic data in the Southern Atlas Flexure (Algeria)

2016 ◽  
Vol 121 ◽  
pp. 100-107 ◽  
Author(s):  
O. Meliani ◽  
A. Bourmatte ◽  
M. Hamoudi ◽  
H. Haddoum ◽  
Y. Quesnel
Keyword(s):  
Magnetic Data ◽  
Moho Depth ◽  
Gravity And Magnetic ◽  
Gravity And Magnetic Data
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