Evaluating hydrothermal system evolution using geochronological dating and biological diversity analyses

Hidenori Kumagai, Hiromi Watanabe, Takuya Yahagi, Shigeaki Kojima, Shun’Ichi Nakai, Shin Toyoda, Jun Ichiro Ishibashi

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)

Abstract

To elucidate the evolution of hydrothermal activities, we conducted an interdisciplinary study including geochemistry and biology to develop a method of obtaining reliable age information. As geochemical dating techniques, two methods applicable for hydrothermal ore minerals were developed and improved: electron spin resonance method and uranium–thorium disequilibrium method. Cross checks between the two methods generally showed good agreement for the range of hundreds to thousands of years. As biological analysis, the biodiversity among faunal communities in the targeted areas was analyzed at the species and DNA levels. Species and genetic diversity of the local fauna were not always correlated to geochemical dating, either in the southern Mariana Trough region or in the Okinawa Trough region. Although the results are not simple, comparison of age information obtained from analyses of these two disciplines potentially provides important constraints for discussion of the history and evolution of hydrothermal activities.

Original languageEnglish
Title of host publicationSubseafloor Biosphere Linked to Hydrothermal Systems
Subtitle of host publicationTAIGA Concept
PublisherSpringer Japan
Pages49-59
Number of pages11
ISBN (Electronic)9784431548652
ISBN (Print)9784431548645
DOIs
Publication statusPublished - Jan 1 2015

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All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

Cite this

Kumagai, H., Watanabe, H., Yahagi, T., Kojima, S., Nakai, SI., Toyoda, S., & Ishibashi, J. I. (2015). Evaluating hydrothermal system evolution using geochronological dating and biological diversity analyses. In Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept (pp. 49-59). Springer Japan. https://doi.org/10.1007/978-4-431-54865-2_5