Potential analytical interferences when measuring Tmax during temperature programmed pyrolysis of hydrothermally altered volcanoclastic sediment

Stephen A. Bowden*, Yuino Kobayashi, Ogheneworo E. Offeh, Man Yin Tsang, Yuzuru Yamamoto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Downloads (Pure)

Abstract

The temperature of maximum pyrolysis yield (known as Tmax) can be used to determine the level of thermal alteration in sedimentary organic matter; higher Tmax values represent higher thermal alteration. Tmax is commonly measured on petroleum source rocks or similar sediments with high organic carbon contents. It would be desirable to measure the Tmax of volcanic sediments because they can have complex patterns of thermal alteration. However, volcanic sediments often have low total organic carbon contents and consequently are susceptible to analytical interferences. Despite this, it can be shown that meaningful Tmax measurements can still be made in sediment with organic carbon contents as low as 0.2% and that interference caused by bitumen or ionizable salts can be mitigated by solvent extraction and rinsing with water. Thus, it is reasonable to use temperature programmed pyrolysis to assess levels of thermal alteration in even low total organic carbon volcanoclastic sediments.

Original languageEnglish
Article numbere5
Number of pages11
JournalExperimental Results
Volume4
DOIs
Publication statusPublished - 10 Feb 2023

Bibliographical note

Open Access via the CUP Agreement
Funding Information:
SAB acknowledges support by the Kobe University Strategic International Collaborative Research Grant Award and Daiwa Anglo-Japanese Foundation Small Grant, OEO acknowledges a PhD studentship sponsored by the Tertiary Education Trust Fund (Nigeria), MYT acknowledges the JSPS International Research Fellowship and the associated JSPS Grant-in-Aid (20F20773).

Keywords

  • Rock-Eval
  • temperature programmed pyrolysis
  • thermal maturity
  • Tmax
  • volcanic sediment

Fingerprint

Dive into the research topics of 'Potential analytical interferences when measuring Tmax during temperature programmed pyrolysis of hydrothermally altered volcanoclastic sediment'. Together they form a unique fingerprint.

Cite this