Density and velocity model of metamorphic rock properties in the upper and middle crystalline crust in the Kola superdeep borehole (SG-3) section

2013 ◽  
pp. 165-174
Author(s):  
Feliks F. Gorbatsevich
Keyword(s):  
Metamorphic Rock ◽  
Velocity Model ◽  
Rock Properties ◽  
Superdeep Borehole ◽  
Kola Superdeep Borehole ◽  
Crystalline Crust

DENSITIES OF METAMORPHIC ROCKS

Geophysics ◽  
1971 ◽  
Vol 36 (4) ◽  
pp. 690-694 ◽  
Author(s):  
Scott B. Smithson
Keyword(s):  
Metamorphic Rock ◽  
Granite Gneiss ◽  
Biotite Granite ◽  
Metamorphic Rocks ◽  
Upper Crust ◽  
Rock Density ◽  
Rock Types ◽  
Crystalline Crust ◽  
The Mean ◽  
Few Data

Although metamorphic rocks comprise a large part of the crystalline crust, relatively few data concerning metamorphic rock densities are available. In this paper, we present rock densities from seven different metamorphic terrains. Mean densities for rock types range from [Formula: see text] for biotite granite gneiss to [Formula: see text] for diopside granofels. Mean rock densities for metamorphic terrains range from 2.70 to [Formula: see text]. Rock density may decrease in the lower part of the upper crust. Most mean rock densities for metamorphic terrains fall between 2.70 and [Formula: see text]; the mean density of [Formula: see text] commonly used for the upper crystalline crust is too low.

Petrochemical systematics of amphibolites from the Archean section of the Kola Superdeep Borehole

2007 ◽  
Vol 45 (2) ◽  
pp. 123-130 ◽  
Author(s):  
N. E. Kozlov ◽  
E. V. Martynov ◽  
N. E. Kozlova ◽  
T. V. Kaulina ◽  
Yu. P. Smirnov
Keyword(s):  
Superdeep Borehole ◽  
Kola Superdeep Borehole

Investigation of Geoacoustic Emission in Kola Superdeep Borehole

2006 ◽  
Author(s):  
N.I. Nachapkin ◽  
A.K. Troyanov ◽  
J.G. Astrahantsev ◽  
N.A. Beloglazova ◽  
D.M. Guberman ◽  
...  
Keyword(s):  
Geoacoustic Emission ◽  
Superdeep Borehole ◽  
Kola Superdeep Borehole

scholarly journals Exceptional Concentrations of Gold Nanoparticles in 1,7 Ga Fluid Inclusions From the Kola Superdeep Borehole, Northwest Russia

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
V. Yu. Prokofiev ◽  
D. A. Banks ◽  
K. V. Lobanov ◽  
S. L. Selektor ◽  
V. A. Milichko ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Fluid Inclusions ◽  
Superdeep Borehole ◽  
Kola Superdeep Borehole

A TWO-PARAMETER MODEL OF ELASTIC WAVE VELOCITIES IN ROCKS AND NUMERICAL AVO MODELING

2004 ◽  
Vol 12 (04) ◽  
pp. 619-630
Author(s):  
YUE-FENG SUN
Keyword(s):  
Acoustic Wave ◽  
Pore Structure ◽  
Carbonate Rocks ◽  
Seismic Waves ◽  
Velocity Model ◽  
Rock Properties ◽  
Seismic Wave Velocity ◽  
Amplitude Variation With Offset ◽  
Wave Speeds ◽  
Two Parameter

Acoustic wave propagation is sensitive to many rock properties including fluid content, porosity, and pore structure, among others. Pore structure is one of the important parameters in controlling both seismic wave velocity and permeability in sandstones and carbonate rocks. For a given porosity of two similar rocks with different pore structure, their acoustic wave speeds can differ 2 km/s and permeability can span nearly six orders of magnitude from 0.01 mD to 20 D in both sandstones and limestones. In this paper, we introduce a two-parameter velocity model defined by porosity and a new pore structure parameter called as frame flexibility factor. Using this model, we define three pore structure types (PST) to quantify the pore structure effects on elastic properties of sedimentary rocks. These three PSTs have their distinct characteristics on synthetic shot gathers and common midpoint gathers. This study indicates that it may be feasible to use this new concept and method to detect pore structure variations in reservoir rocks from field seismic data. This study also helps explain why analysis of amplitude variation with offset (AVO) in some cases fails for fluid detection: pore structure effect on seismic waves can mask all the fluid effects, especially in carbonate rocks.

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