The effect of variations in cooling rates on mineral compositions in mid-ocean ridge basalts

Anders McCarthy, Cyril Chelle-Michou, Jonathan D. Blundy, Michael J. Dorais, Froukje M. Van der Zwan, David W. Peate, EIMF (Edinburgh Ion Microprobe Facility)

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We present textural and chemical analyses of minerals from a 150 m thick sequence of submarine mid-ocean ridge basalts from the South China Sea in order to showcase the effect of variations in magma cooling rates on mineral texture and mineral composition. Groundmass plagioclase and clinopyroxene show gradual changes in texture and composition as flows grade from slowly cooled, meter-thick massive flows to more rapidly cooled dm-thick pillow lobes with quenched glassy margins. The corresponding change in cooling-rate is estimated to vary from
Original languageEnglish (US)
Pages (from-to)121415
JournalChemical Geology
Volume625
DOIs
StatePublished - Mar 22 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-04-03
Acknowledgements: A.M acknowledge the support of Swiss IODP, as well as grants P2LAP2_171819 and PZ00P2_193471 of the Swiss National Science Foundation. FMvdZ thanks IODP Germany and GEOMAR for support. JDB is supported by a Royal Society Research Professorship. We are grateful for the dedicated support from the NERC ion-microprobe facility at Edinburgh University, as well as B. Buse and S. Kearns for help on the Bristol electron microprobe. The hard work of the captain and crew of the R/V JOIDES Resolution and the IODP-JRSO technicians are gratefully acknowledged. We also would like to acknowledge the detailed and constructive reviewers of. S Mollo and an anonymous reviewer as well as editorial handling by S. Aulbach which helped to clarify the manuscript.

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology

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