The effect of diagenesis on oxygen isotope ratios of biogenic phosphates

Clicks: 4
ID: 293923
2000
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Steady

Ranked #1,558 of 8,486 articles by views in american journal of science

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 8,486 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
The effect of diagenesis on the oxygen isotope composition of ancient biogenic phosphates was evaluated by measuring different types of material from Middle Triassic localities in the Southern Alps. Dentin, bone and tooth enamel of different taxa, hosted by different rock types and metamorphosed to differing degrees, were analyzed for their delta ^18^ O and delta ^13^ C values using a new microanalytical GC-IRMMS technique. The delta ^18^ O values of the majority of bone and bulk tooth samples were 18 to 19 permil (SMOW), with three samples below this range and one close to 20 permil. In contrast, samples of tooth enamel were 19.4 to 20.7 permil, significantly higher than bone and bulk tooth. Without the enamel data, the 18 to 19 permil data could be misinterpreted as primary. Only when the higher delta ^18^ O values of the enamel are considered, is it apparent that the bulk data have undergone diagenesis, and temperature estimates are approximately 5 degrees C lower than would otherwise be calculated. Alteration of bulk tooth is also seen in a Miocene shark tooth, where delta ^18^ O values of enamel are 3 permil higher than those of bulk tooth. Although enamel is routinely analyzed for paleoclimate work of herbivorous mammals, bulk bone, teeth, or shells are almost exclusively used for older marine samples. The results of the present study indicate that bulk data should be treated with caution.
Reference Key
openalex_W2170795515 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Z. D. Sharp
Journal american journal of science
Year 2000
DOI
10.2475/ajs.300.3.222
URL
https://ajs.scholasticahq.com/article/61340.pdf
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.