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Archive · collection · 2008

Strontium isotope and rare earth element geochemistry of basalts from DSDP Leg 37

Listed in PANGAEA and DataCite — shown once because both records carry DOI 10.1594/pangaea.708718

87Sr/S6Sr ratios have been determined on eleven whole rock basalt samples from DSDP Leg 37.

Description

The 87Sr/S6Sr ratios range from 0.70305 +/- 4 to 0.70451 +/- 4 due to alteration and contamination with seawater Sr. Leaching with 5% HF has only a small effect on the 87Sr/86Sr of the samples.

However, treatment with 6M HCl in acid digestion bombs at 130°C removes the contaminant more effectively. Altered plagioclase and olivine are dissolved during this process. The mean 87Sr/86Sr of four HCl-treated samples from hole 332A is 0.70299 and that for five samples from hole 332B is 0.70297.

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The 87Sr/86Sr ratios of treated samples from holes 333A and 335 are 0.70304 +/- 4 and 0.70316 +/- 4, respectively. These 87Sr/86Sr ratios are within the range observed for other basalts elsewhere along the Mid-Atlantic Ridge in the North Atlantic. REE distribution patterns have been determined for four samples, three from hole 332B and one from hole 335.

CeN/YbN ratios range from 0.58 to 1.30 and do not correlate with 87Sr/86Sr ratios. The source regions of these basalts appear to have been variable in REE abundances.

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Inferred from text
Geochemistry 75%
Provenance · 2 source records, 8 field assertions
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PANGAEAoai:pangaea.de:doi:10.1594/PANGAEA.70871813 d agoJSON v1
DataCite10.1594/pangaea.70871813 d agoJSON v1
FieldAssertionExtractorEvidence
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concepts[field].anzsrc:group:3703enrichment · DataCitetaxonomy-embedding@1.1.0title+keywords+description (75%)
concepts[field].local:field:earth-environmentalmapping · PANGAEAconnector:pangaea@1.0.0
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