Variations of gravity anomaly roughness in Chugoku district, Japan: Relationship with distributions of topographic lineaments
Earth, Planets and Space volume 56, pages e5–e8 (2004)
Tectonic movement may disturb lateral continuities of crustal structures at weak zones. These lateral discontinuities of density structure cause undulations of the gravity anomaly field whose complexity can be an indicator of past crustal instability. On the other hand, topographic lineaments are formed along weak crustal zones. We would expect therefore that gravity anomaly roughness bears some relation to the distribution of surface lineaments. We develop a statistical method by employing the Bouguer anomaly standard deviation as an index of gravity anomaly roughness in terms of which we interpret the spatial distribution of topographic lineaments in Chugoku district, Japan. Locations of the lineaments, which could be diagnostic of the heterogeneity of the previously damaged crust, tend to coincide with those of high roughness areas of gravity anomaly fields.
Bird, R. T. and R. A. Pockalny, Late Cretaceous and Cenozoic seafloor and oceanic basement roughness: Spreading rate, crustal age and sediment thickness correlations, Earth Planet. Sci. Lett., 123, 239–254, 1994.
Fujiwara, K., Planation surfaces of Chugoku district, Japan: Their pluralistic development, edited by K. Fujiwara, Frontiers of Topography, Daimeido Press, 47–70, 1996 (in Japanese).
Geological Survey of Japan (ed.), Gravity CD-ROM of Japan, Digital Geoscience Map P-2, Geological Survey of Japan, 2000.
Goff, J. A., Quantitative characterization of abyssal hill morphology along flow lines in the Atlantic Ocean, J. Geophys. Res., 97, 9183–9202, 1992.
Gravity Research Group in Southwest Japan (Representatives: Ryuichi Shichi and Akihiko Yamamoto), Gravity measurements and database in southwest Japan, Gravity Database of Southwest Japan (CD-ROM), Bull. Nagoya University Museum, Special Rept., No.9, 2001.
Kudo, T. and M. Furumoto, Characterization of crustal structures by fractal analysis of gravity anomalies, Proc. Japan Academy, Ser. B, 74, 69–74, 1998.
Kudo, T. and Y. Kono, Relationship between distributions of shallow earthquakes and gradients of gravity anomaly field in Southwest Japan, Zisin (J. Seismological Soc. Japan), 52, 341–350, 1999 (in Japanese with English abstract).
Kudo, T., A. Yamaji, M. Furumoto, and T. Nagao, Effective elastic thickness of island arc lithosphere under Japan, The Island Arc, 10, 135–144, 2001.
Malinverno, A., Inverse square-root dependence of mid-ocean ridge flank roughness on spreading rate, Nature, 352, 58–60, 1991.
Nakata, T., and T. Imaizumi (eds.), Digital active fault map of Japan, Univ. of Tokyo Press, 2002 (in Japanese).
Otofuji, Y., T. Matsuda, and S. Nohda, Opening mode of the Japan Sea inferred form the palaeo-magnetism of the Japan Arc, Nature, 317, 603–604, 1985.
Shichi, R., A. Yamamoto, A. Kimura, and H. Aoki, Gravimetric evidences for active faults around Mt. Ontake, central Japan: Specifically for the hidden faulting of the 1984 western Nagano Prefecture earthquake, J. Phys. Earth, 40, 459–478, 1992.
Small, C. and D. T. Sandwell, An analysis of ridge axis gravity roughness and spreading rate, J. Geophys. Res., 97, 3235–3245, 1992.
Tai, Y., Some problems on the peneplanation of the Chugoku Mountains based on the Miocene paleogeography, Japan, J. Geography, 84, 133–139, 1975 (in Japanese with English abstract).
Takada, K., T. Nakata, T. Nohara, T. Haraguchi, Y. Ikeda, K. Ito, T. Imaizumi, K. Otsuki, T. Sagiya, and H. Tsutsumi, Evaluation of active faults and lineaments as potential seismogenic faults in Chugoku district, Southwest Japan, Active Fault Research, 23, 77–91, 2003 (in Japanese with English abstract).
About this article
Cite this article
Kudo, T., Yamamoto, A., Nohara, T. et al. Variations of gravity anomaly roughness in Chugoku district, Japan: Relationship with distributions of topographic lineaments. Earth Planet Sp 56, e5–e8 (2004). https://doi.org/10.1186/BF03352505
- Gravity anomaly
- standard deviation
- Chugoku District
- active fault