THE EFFECT OF METAMORPHISM AND POROSITY ON PROPAGATION VELOCITY OF P-WAVE IN REGIONAL METAMORPHIC ROCKS (EXAMPLE FROM ZAYANDEHROOD AREA, SANANDAJ - SIRJAN)

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SAMADI L.

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Journal: Journal of the Earth and Space Physics Year:2002 | Volume:28 | Issue:2 Page(s): 59-66

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Title

THE EFFECT OF METAMORPHISM AND POROSITY ON PROPAGATION VELOCITY OF P-WAVE IN REGIONAL METAMORPHIC ROCKS (EXAMPLE FROM ZAYANDEHROOD AREA, SANANDAJ - SIRJAN)

Author(s)

SAMADI L. | Issue Writer Certificate

Keywords

METAMORPHIC ROCKSQ4

P-WAVEQ4

POROSITYQ3

VELOCITY GRADIENTQ4

Abstract

In this paper the distribution of P-WAVE velocity in regionally metamorphosed rocks of the Zayandeh-rud dam has been investigated. The data collection has been carried out by a 24 channel digital device. Data analysis shows that P-WAVE velocity in METAMORPHIC ROCKS increases with depth continuously following the linear equation v(z)=3200+6.5.z. The P-WAVE velocity in accordance with metamorphic grades from slate to schist changes from 3200 m/s at surface up to 5475 m/s at 350 m depth. High VELOCITY GRADIENT in METAMORPHIC ROCKS of the study area is a consequence of changes in metamorphic grades from surface to the investigated depth and the effects of surface weathering. The calculation of POROSITY based on Wyllie (1965) equation indicated that the POROSITY has changed from 5.5% at the surface to less than 1% at the 350 m depth continuously, which is in agreement with lithological changes from slate to schist.

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اثر تخلخل بر سرعت موج تراکمی در ماسه سنگ ها و مقایسه روابط سرعت با توجه به داده های آزمایشگاهی و صحرایی

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APA: Copy

SAMADI, L.. (2002). THE EFFECT OF METAMORPHISM AND POROSITY ON PROPAGATION VELOCITY OF P-WAVE IN REGIONAL METAMORPHIC ROCKS (EXAMPLE FROM ZAYANDEHROOD AREA, SANANDAJ - SIRJAN). JOURNAL OF THE EARTH AND SPACE PHYSICS, 28(2), 59-66. SID. https://sid.ir/paper/80412/en

Vancouver: Copy

SAMADI L.. THE EFFECT OF METAMORPHISM AND POROSITY ON PROPAGATION VELOCITY OF P-WAVE IN REGIONAL METAMORPHIC ROCKS (EXAMPLE FROM ZAYANDEHROOD AREA, SANANDAJ - SIRJAN). JOURNAL OF THE EARTH AND SPACE PHYSICS[Internet]. 2002;28(2):59-66. Available from: https://sid.ir/paper/80412/en

IEEE: Copy

L. SAMADI, “THE EFFECT OF METAMORPHISM AND POROSITY ON PROPAGATION VELOCITY OF P-WAVE IN REGIONAL METAMORPHIC ROCKS (EXAMPLE FROM ZAYANDEHROOD AREA, SANANDAJ - SIRJAN),” JOURNAL OF THE EARTH AND SPACE PHYSICS, vol. 28, no. 2, pp. 59–66, 2002, [Online]. Available: https://sid.ir/paper/80412/en

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