Use of strontium isotopes to constrain the timing and mode of dolomitization of Upper Cenozoic sediments in a core from San Salvador, Bahamas.

P. K. Swart, Joaquin Ruiz, C. W. Holmes

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The 87Sr/86Sr ratios and the activity ratios of 234U/238U and 230Th/238U have been measured on dolomites from a 168 m deep core taken on the island of San Salvador, Bahamas. These data suggest 2 periods of dolomitization. The first episode dolomitized Miocene age sediments during the latest Miocene, and the second dolomitized the Pliocene portion of the core and was still active as recently as 150 Ka. The late timing of the second episode argues against penecontemporaneous models of dolomitization for the Pliocene sediments. Instead, dolomitization is favoured either as a result of mixing-zone development during the large Pleistocene sea-level changes or by movement of seawater through the platform.-Authors

Original languageEnglish (US)
Pages (from-to)262-265
Number of pages4
JournalGeology
Volume15
Issue number3
StatePublished - 1987
Externally publishedYes

Fingerprint

strontium isotope
dolomitization
Pliocene
Miocene
sediment
sea level change
dolomite
Pleistocene
seawater

ASJC Scopus subject areas

  • Geology

Cite this

Use of strontium isotopes to constrain the timing and mode of dolomitization of Upper Cenozoic sediments in a core from San Salvador, Bahamas. / Swart, P. K.; Ruiz, Joaquin; Holmes, C. W.

In: Geology, Vol. 15, No. 3, 1987, p. 262-265.

Research output: Contribution to journalArticle

@article{8cb3bb746a3b49ce9ce4ad9dc19af011,
title = "Use of strontium isotopes to constrain the timing and mode of dolomitization of Upper Cenozoic sediments in a core from San Salvador, Bahamas.",
abstract = "The 87Sr/86Sr ratios and the activity ratios of 234U/238U and 230Th/238U have been measured on dolomites from a 168 m deep core taken on the island of San Salvador, Bahamas. These data suggest 2 periods of dolomitization. The first episode dolomitized Miocene age sediments during the latest Miocene, and the second dolomitized the Pliocene portion of the core and was still active as recently as 150 Ka. The late timing of the second episode argues against penecontemporaneous models of dolomitization for the Pliocene sediments. Instead, dolomitization is favoured either as a result of mixing-zone development during the large Pleistocene sea-level changes or by movement of seawater through the platform.-Authors",
author = "Swart, {P. K.} and Joaquin Ruiz and Holmes, {C. W.}",
year = "1987",
language = "English (US)",
volume = "15",
pages = "262--265",
journal = "Geology",
issn = "0091-7613",
publisher = "Geological Society of America",
number = "3",

}

TY - JOUR

T1 - Use of strontium isotopes to constrain the timing and mode of dolomitization of Upper Cenozoic sediments in a core from San Salvador, Bahamas.

AU - Swart, P. K.

AU - Ruiz, Joaquin

AU - Holmes, C. W.

PY - 1987

Y1 - 1987

N2 - The 87Sr/86Sr ratios and the activity ratios of 234U/238U and 230Th/238U have been measured on dolomites from a 168 m deep core taken on the island of San Salvador, Bahamas. These data suggest 2 periods of dolomitization. The first episode dolomitized Miocene age sediments during the latest Miocene, and the second dolomitized the Pliocene portion of the core and was still active as recently as 150 Ka. The late timing of the second episode argues against penecontemporaneous models of dolomitization for the Pliocene sediments. Instead, dolomitization is favoured either as a result of mixing-zone development during the large Pleistocene sea-level changes or by movement of seawater through the platform.-Authors

AB - The 87Sr/86Sr ratios and the activity ratios of 234U/238U and 230Th/238U have been measured on dolomites from a 168 m deep core taken on the island of San Salvador, Bahamas. These data suggest 2 periods of dolomitization. The first episode dolomitized Miocene age sediments during the latest Miocene, and the second dolomitized the Pliocene portion of the core and was still active as recently as 150 Ka. The late timing of the second episode argues against penecontemporaneous models of dolomitization for the Pliocene sediments. Instead, dolomitization is favoured either as a result of mixing-zone development during the large Pleistocene sea-level changes or by movement of seawater through the platform.-Authors

UR - http://www.scopus.com/inward/record.url?scp=0023523330&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0023523330&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0023523330

VL - 15

SP - 262

EP - 265

JO - Geology

JF - Geology

SN - 0091-7613

IS - 3

ER -