The Effect of Magmatic Activity on Hydrothermal Venting Along the Superfast-Spreading East Pacific Rise

Autor:	Kei Okamura, K. Kisimoto, Edward T. Baker, John E. Lupton, Tsugio Shibata, Osamu Okano, James F. Gendron, K. K. Roe, T. Matsumoto, Nozomi Ytow, T. Yabuki, Katsumi Marumo, K. Nakamura, G. Paradis, Gary J. Massoth, Jun-ichiro Ishibashi, David A. Tennant, R. Greene, Y. Kaiho, A. Maruyama, Taku Urabe, Azusa Nishizawa, Kiminori Shitashima, A. Sonoda, M. Aoki, Sharon L. Walker, T. Vance, Geoffrey T. Lebon, Toshitsugu Yamazaki, Richard A. Feely
Rok vydání:	1995
Předmět:	geography Multidisciplinary geography.geographical_feature_category Geochemistry Mineralogy Mid-ocean ridge Magma chamber Hydrothermal circulation Plume Ridge Oceanic crust Panache Volatiles Geology
Zdroj:	Scopus-Elsevier
ISSN:	1095-9203 0036-8075
Popis:	A survey of hydrothermal activity along the superfast-spreading (approximately 150 millimeters per year) East Pacific Rise shows that hydrothermal plumes overlay approximately 60 percent of the ridge crest between 13°509 and 18°409S, a plume abundance nearly twice that known from any other rige portion of comparable length. Plumes were most abundant where the axial cross section is inflated and an axial magma chamber is present. Plumes with high ratios of volatile ( 3 He, CH 4 , and H 2 S) to nonvolatile (Mn and Fe) species marked where hydrothermal circulation has been perturbed by recent magmatic activity. The high proportion of volatile-rich plumes observed implies that such episodes are more frequent here than on slower spreading ridges.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05d2b90d7785e2156291d4c896d9b03a https://doi.org/10.1126/science.269.5227.1092 Zobrazit plný text záznamu Plný text ve formátu PDF