Hydrothermal venting along Earth's fastest spreading center: East Pacific Rise, 27.5°-32.3°S

E. T. Baker, R. N. Hey, J. E. Lupton, J. A. Resing, R. A. Feely, J. J. Gharib, G. J. Massoth, F. J. Sansone, M. Kleinrock, F. Martinez, D. F. Naar, C. Rodrigo, D. Bohnenstiehl, D. Pardee

Resultado de la investigación: Article

37 Citas (Scopus)

Resumen

During March/April 1998 we conducted detailed mapping and sampling of hydrothermal plumes along six segments of Earth's fasting spreading mid-ocean ridge, 27.5°-32.3°S on the East Pacific Rise. We compared the distribution and chemistry of hydrothermal plumes to geological indicators of long-term (spreading rate) and moderate-term (ridge inflation) variations in magmatic budget. In this large-offset, propagating rift setting, these geological indices span virtually the entire range found along fast spreading ridges worldwide. Hydrothermal plumes overlaid ∼60% of the length of superfast (>130 km/Myr) spreading axis surveyed and defined at least 14 separate vent fields. We observed no plumes over the slower spreading propagating segments. Finer-scale variations in the magmatic budget also correlated with hydrothermal activity, as the location of the five most intense plumes corresponded to subsegment peaks in ridge inflation. Along the entire ridge crest, the more inflated a ridge location the more likely it was to be overlain by a hydrothermal plume. Plume chemistry mostly reflected discharge from mature vent fields apparently unperturbed by magmatic activity within the last few years. Plume samples with high volatile/metal ratios, generally indicating recent seafloor volcanism, were scarce. Along-axis trends in both volatile (3He; CH4; ΔpH, a proxy for CO2; and particulate S) and nonvolatile (Fe, Mn) species showed a first-order agreement with the trend of ridge inflation. Nevertheless, a broad correspondence between the concentration of volatile species in plumes and geological proxies of magma supply identifies a pervasive magmatic imprint on this superfast spreading group of ridge segments.

Idioma originalEnglish
PublicaciónJournal of Geophysical Research: Solid Earth
Volumen107
N.º7
EstadoPublished - 10 jul 2002

Huella dactilar

venting
Vents
spreading center
hydrothermal plume
plumes
plume
Earth (planet)
ridges
inflation
Metals
Sampling
vents
fasting
mid-ocean ridge
hydrothermal activity
budgets
volcanism
seafloor
chemistry
magma

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Citar esto

Baker, E. T., Hey, R. N., Lupton, J. E., Resing, J. A., Feely, R. A., Gharib, J. J., ... Pardee, D. (2002). Hydrothermal venting along Earth's fastest spreading center: East Pacific Rise, 27.5°-32.3°S. Journal of Geophysical Research: Solid Earth, 107(7).
Baker, E. T. ; Hey, R. N. ; Lupton, J. E. ; Resing, J. A. ; Feely, R. A. ; Gharib, J. J. ; Massoth, G. J. ; Sansone, F. J. ; Kleinrock, M. ; Martinez, F. ; Naar, D. F. ; Rodrigo, C. ; Bohnenstiehl, D. ; Pardee, D. / Hydrothermal venting along Earth's fastest spreading center : East Pacific Rise, 27.5°-32.3°S. En: Journal of Geophysical Research: Solid Earth. 2002 ; Vol. 107, N.º 7.
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title = "Hydrothermal venting along Earth's fastest spreading center: East Pacific Rise, 27.5°-32.3°S",
abstract = "During March/April 1998 we conducted detailed mapping and sampling of hydrothermal plumes along six segments of Earth's fasting spreading mid-ocean ridge, 27.5°-32.3°S on the East Pacific Rise. We compared the distribution and chemistry of hydrothermal plumes to geological indicators of long-term (spreading rate) and moderate-term (ridge inflation) variations in magmatic budget. In this large-offset, propagating rift setting, these geological indices span virtually the entire range found along fast spreading ridges worldwide. Hydrothermal plumes overlaid ∼60{\%} of the length of superfast (>130 km/Myr) spreading axis surveyed and defined at least 14 separate vent fields. We observed no plumes over the slower spreading propagating segments. Finer-scale variations in the magmatic budget also correlated with hydrothermal activity, as the location of the five most intense plumes corresponded to subsegment peaks in ridge inflation. Along the entire ridge crest, the more inflated a ridge location the more likely it was to be overlain by a hydrothermal plume. Plume chemistry mostly reflected discharge from mature vent fields apparently unperturbed by magmatic activity within the last few years. Plume samples with high volatile/metal ratios, generally indicating recent seafloor volcanism, were scarce. Along-axis trends in both volatile (3He; CH4; ΔpH, a proxy for CO2; and particulate S) and nonvolatile (Fe, Mn) species showed a first-order agreement with the trend of ridge inflation. Nevertheless, a broad correspondence between the concentration of volatile species in plumes and geological proxies of magma supply identifies a pervasive magmatic imprint on this superfast spreading group of ridge segments.",
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author = "Baker, {E. T.} and Hey, {R. N.} and Lupton, {J. E.} and Resing, {J. A.} and Feely, {R. A.} and Gharib, {J. J.} and Massoth, {G. J.} and Sansone, {F. J.} and M. Kleinrock and F. Martinez and Naar, {D. F.} and C. Rodrigo and D. Bohnenstiehl and D. Pardee",
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Baker, ET, Hey, RN, Lupton, JE, Resing, JA, Feely, RA, Gharib, JJ, Massoth, GJ, Sansone, FJ, Kleinrock, M, Martinez, F, Naar, DF, Rodrigo, C, Bohnenstiehl, D & Pardee, D 2002, 'Hydrothermal venting along Earth's fastest spreading center: East Pacific Rise, 27.5°-32.3°S', Journal of Geophysical Research: Solid Earth, vol. 107, n.º 7.

Hydrothermal venting along Earth's fastest spreading center : East Pacific Rise, 27.5°-32.3°S. / Baker, E. T.; Hey, R. N.; Lupton, J. E.; Resing, J. A.; Feely, R. A.; Gharib, J. J.; Massoth, G. J.; Sansone, F. J.; Kleinrock, M.; Martinez, F.; Naar, D. F.; Rodrigo, C.; Bohnenstiehl, D.; Pardee, D.

En: Journal of Geophysical Research: Solid Earth, Vol. 107, N.º 7, 10.07.2002.

Resultado de la investigación: Article

TY - JOUR

T1 - Hydrothermal venting along Earth's fastest spreading center

T2 - East Pacific Rise, 27.5°-32.3°S

AU - Baker, E. T.

AU - Hey, R. N.

AU - Lupton, J. E.

AU - Resing, J. A.

AU - Feely, R. A.

AU - Gharib, J. J.

AU - Massoth, G. J.

AU - Sansone, F. J.

AU - Kleinrock, M.

AU - Martinez, F.

AU - Naar, D. F.

AU - Rodrigo, C.

AU - Bohnenstiehl, D.

AU - Pardee, D.

PY - 2002/7/10

Y1 - 2002/7/10

N2 - During March/April 1998 we conducted detailed mapping and sampling of hydrothermal plumes along six segments of Earth's fasting spreading mid-ocean ridge, 27.5°-32.3°S on the East Pacific Rise. We compared the distribution and chemistry of hydrothermal plumes to geological indicators of long-term (spreading rate) and moderate-term (ridge inflation) variations in magmatic budget. In this large-offset, propagating rift setting, these geological indices span virtually the entire range found along fast spreading ridges worldwide. Hydrothermal plumes overlaid ∼60% of the length of superfast (>130 km/Myr) spreading axis surveyed and defined at least 14 separate vent fields. We observed no plumes over the slower spreading propagating segments. Finer-scale variations in the magmatic budget also correlated with hydrothermal activity, as the location of the five most intense plumes corresponded to subsegment peaks in ridge inflation. Along the entire ridge crest, the more inflated a ridge location the more likely it was to be overlain by a hydrothermal plume. Plume chemistry mostly reflected discharge from mature vent fields apparently unperturbed by magmatic activity within the last few years. Plume samples with high volatile/metal ratios, generally indicating recent seafloor volcanism, were scarce. Along-axis trends in both volatile (3He; CH4; ΔpH, a proxy for CO2; and particulate S) and nonvolatile (Fe, Mn) species showed a first-order agreement with the trend of ridge inflation. Nevertheless, a broad correspondence between the concentration of volatile species in plumes and geological proxies of magma supply identifies a pervasive magmatic imprint on this superfast spreading group of ridge segments.

AB - During March/April 1998 we conducted detailed mapping and sampling of hydrothermal plumes along six segments of Earth's fasting spreading mid-ocean ridge, 27.5°-32.3°S on the East Pacific Rise. We compared the distribution and chemistry of hydrothermal plumes to geological indicators of long-term (spreading rate) and moderate-term (ridge inflation) variations in magmatic budget. In this large-offset, propagating rift setting, these geological indices span virtually the entire range found along fast spreading ridges worldwide. Hydrothermal plumes overlaid ∼60% of the length of superfast (>130 km/Myr) spreading axis surveyed and defined at least 14 separate vent fields. We observed no plumes over the slower spreading propagating segments. Finer-scale variations in the magmatic budget also correlated with hydrothermal activity, as the location of the five most intense plumes corresponded to subsegment peaks in ridge inflation. Along the entire ridge crest, the more inflated a ridge location the more likely it was to be overlain by a hydrothermal plume. Plume chemistry mostly reflected discharge from mature vent fields apparently unperturbed by magmatic activity within the last few years. Plume samples with high volatile/metal ratios, generally indicating recent seafloor volcanism, were scarce. Along-axis trends in both volatile (3He; CH4; ΔpH, a proxy for CO2; and particulate S) and nonvolatile (Fe, Mn) species showed a first-order agreement with the trend of ridge inflation. Nevertheless, a broad correspondence between the concentration of volatile species in plumes and geological proxies of magma supply identifies a pervasive magmatic imprint on this superfast spreading group of ridge segments.

KW - East Pacific Rise

KW - Hydrothermal plumes

KW - Magmatic budget

KW - Marine chemistry

KW - Mid-ocean ridge

UR - http://www.scopus.com/inward/record.url?scp=0037055358&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0037055358

VL - 107

JO - Journal of Geophysical Research: Solid Earth

JF - Journal of Geophysical Research: Solid Earth

SN - 0148-0227

IS - 7

ER -

Baker ET, Hey RN, Lupton JE, Resing JA, Feely RA, Gharib JJ y otros. Hydrothermal venting along Earth's fastest spreading center: East Pacific Rise, 27.5°-32.3°S. Journal of Geophysical Research: Solid Earth. 2002 jul 10;107(7).