Skip to main content
SpringerLink
Log in

Caldera structure inferred from gravity anomalies west of Nagamachi-Rifu Fault, Northeast Japan

  • Article
  • Published:
Earth, Planets and Space Submit manuscript

Abstract

A gravity survey was conducted in and around the Nagamachi-Rifu Fault. The density for both terrain and Bouguer corrections was chosen to be 2,300 kg/m3, because volcanic rocks are dominant over the whole measurement area and the surface layer density is estimated to be low from geological considerations. The Bouguer anomalies are characterized by a low anomaly similar to those of a caldera and the basement structure inferred from two and three-dimensional analysis shows that the depth is often more than 1 km in the caldera region and that there is a circular structure. The gradient of basement is steepest at the southern margin, and it resembles to rim of funnel-shaped caldera.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Hunt, T. M., Gravity Anomalies, Caldera Structure, and Subsurface Geology in the Rotorua Area, New Zealand. Geothermics, 21, 65–74, 1992.

    Article  Google Scholar 

  • Ikawa, T., T. Kawanabe, S. Kawasaki, A. Hasegawa, N. Umino, A. Nakamura, H. Ito, T. Iwasaki, and H. Sato, Seismic reflection survey of the deep structure of Nagamachi-Rifu fault, Northeast Japan, Proceedings of International Symposium on Slip and Flow Processes in and below the Seismogenic Region, 301–308, 2001.

  • Geographical Survey Institute, Establishment of the Japanese Gravity Standardization Net 1975, J. Geod. Soc. Japan, 22, 65–76, 1976 (in Japanese with English abstract).

    Google Scholar 

  • Geological Survey of Japan, Geological Map of Japan 1:200,000/SENDAI, 1987.

  • Komazawa, M., A gravimetric terrain correction method by assuming annular prism model, J. Geod. Soc. Japan, 34, 11–23, 1988 (in Japanese with English abstract).

    Google Scholar 

  • Komazawa, M., Gravimetric analysis of Aso Volcano and its interpretation, J. Geod. Soc. Japan, 41, 17–45, 1995.

    Google Scholar 

  • Woollad, G. P., The new gravity system—Changes in international gravity base values and anomaly values, Geophysics, 44, 1352–1366, 1979.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8567, Japan

    Masao Komazawa

  2. Tohoku University, Aoba-ku, Sendai, Miyagi, 980-8578, Japan

    Masaaki Mishina

Authors
  1. Masao Komazawa
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Masaaki Mishina
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Masao Komazawa.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Komazawa, M., Mishina, M. Caldera structure inferred from gravity anomalies west of Nagamachi-Rifu Fault, Northeast Japan. Earth Planet Sp 54, 1049–1053 (2002). https://doi.org/10.1186/BF03353300

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1186/BF03353300

Keywords

Search

Navigation