Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Ternieten, Lotta; Früh-Green, Gretchen L; Bernasconi, Stefano M (2021): Carbon and oxygen geochemistry of the mantle peridotites of the Wadi Tayin Massif, Samail Ophiolite, ICDP Expedition 5057 Oman Drilling Project [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.937673

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2021-10-29 • DOI registered: 2021-11-08

RIS CitationBibTeX Citation Copy Citation ShareShow MapGoogle Earth 49 17

Abstract:
A large part of the hydrated oceanic lithosphere consists of serpentinites exposed in ophiolites. Serpentinites constitute reactive chemical and thermal systems and potentially represent an effective sink for CO2. Understanding carbonation mechanisms within ophiolites is almost exclusively based on studies of outcrops, which can limit the interpretation of fossil hydrothermal systems. We present stable and radiogenic carbon data that provide insights into the isotopic trends and fluid evolution of peridotite carbonation in ICDP Oman Drilling Project drill holes BA1B (400 m deep) and BA3A (300 m deep). Geochemical investigations of the carbonates in serpentinites indicate formation in the last 50 kyr, implying a distinctly different phase of alteration than the initial oceanic hydration and serpentinization of the Samail Ophiolite. The oldest carbonates (•31 to > 50 kyr) are localized calcite, dolomite, and aragonite veins, formed between 26 to 43 °C and related to focused fluid flow. Subsequent pervasive small amounts of dispersed carbonate precipitated in the last 1000 yr. Macroscopic brecciation and veining of the peridotite indicate that carbonation is influenced by tectonic features allowing infiltration of fluids over extended periods and at different structural levels such as along fracture planes and micro-fractures and grain boundaries, causing large-scale hydration of the ophiolite. The formation of dispersed carbonate is related to percolating fluids with •18O lower than modern ground- and meteoric water. Our study shows that radiocarbon investigations are an essential tool to interpret the carbonation history and that stable oxygen and carbon isotopes alone can result in ambiguous interpretations.
Keyword(s):
Carbon cycle; Clumped isotopes; lithosphere; Oman Drilling Project; peridotite; radiocarbon ages; Samail Ophiolite; Stable carbon and oxygen isotopes
Related to:
Ternieten, Lotta; Früh-Green, Gretchen L; Bernasconi, Stefano M (2021): Carbon Geochemistry of the Active Serpentinization Site at the Wadi Tayin Massif: Insights from the ICDP Oman Drilling Project - Phase II. Earth and Space Science Open Archive (ESSOAr), https://doi.org/10.1002/essoar.10507524.1
Project(s):
International Continental Scientific Drilling Program (ICDP)
Coverage:
Median Latitude: 22.879082 * Median Longitude: 58.702186 * South-bound Latitude: 22.866170 * West-bound Longitude: 58.700090 * North-bound Latitude: 22.882310 * East-bound Longitude: 58.710570
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
5 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this bundled publication

  1. Ternieten, L; Früh-Green, GL; Bernasconi, SM (2021): Content and carbon and oxygen isotope composition of total carbon, total non-carbonate carbon, and total inorganic carbon of mafic and ultramafic rocks from the Wadi Tayin Massif, Samail Ophiolite, Oman Drilling Project Phase II. https://doi.org/10.1594/PANGAEA.937668
  2. Ternieten, L; Früh-Green, GL; Bernasconi, SM (2021): Clumped and oxygen isotope data of aragonite veins from ultramafic and mafic rocks recovered from the Wadi Tayin Massif, Samail Ophiolite, Oman Drilling Project Phase II. https://doi.org/10.1594/PANGAEA.937669
  3. Ternieten, L; Früh-Green, GL; Bernasconi, SM (2021): Clumped and oxygen isotope data of calcite veins from ultramafic and mafic rocks recovered from the Wadi Tayin Massif, Samail Ophiolite, Oman Drilling Project Phase II. https://doi.org/10.1594/PANGAEA.937670
  4. Ternieten, L; Früh-Green, GL; Bernasconi, SM (2021): Clumped and oxygen isotope data of dolomite veins from ultramafic rocks recovered from the Wadi Tayin Massif, Samail Ophiolite, Oman Drilling Project Phase II. https://doi.org/10.1594/PANGAEA.937671
  5. Ternieten, L; Früh-Green, GL; Bernasconi, SM (2021): Radiocarbon isotope data of carbonate veins (aragonite, calcite, dolomite), total inorganic carbon and total non-carbonate carbon from ultramafic and mafic rocks recovered from the Wadi Tayin Massif, Samail Ophiolite, Oman Drilling Project Phase II. https://doi.org/10.1594/PANGAEA.937672