The Early Cretaceous Arperos basin: An oceanic domain dividing the Guerrero arc from nuclear Mexico evidenced by the geochemistry of the lavas and sediments

C. Freydier, H. Lapierre, J. Ruiz, M. Tardy, J. Martinez-R, C. Coulon

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

During the Early Cretaceous, the Arperos basin was located between the Guerrero arc terrane and nuclear Mexico. Remnants of this basin now form an oceanic suture zone between the coeval carbonate platforms to the east and the accreted Guerrero terrane to the west. The geochemistry on the Arperos mafic hypabyssal and volcanic rocks, based on the incompatible and trace element distribution and the εNd(T=110 Ma) values, shows that this basin was floored by basalts that likely were generated by the mixing of OIB and N-MORB sources. The submarine lavas are overlain by and/or interbedded with siliceous sediments that have the highest εNd(T=110 Ma) and lowest Th levels. In contrast, the turbidites interlayered with the pelagic carbonates located at the top of the Arperos stratigraphic column show the lowest εNd(T=110 Ma) values and the highest Th contents. This evolution with time in the chemistry of the Arperos sediments is interpreted as marking the approach of the Guerrero juvenille arc to nuclear Mexico.

Original languageEnglish (US)
Pages (from-to)325-336
Number of pages12
JournalJournal of South American Earth Sciences
Volume13
Issue number4-5
DOIs
StatePublished - 2000

Keywords

  • Arperos basin
  • Guerrero terrane
  • Nuclear Mexico

ASJC Scopus subject areas

  • Geology
  • Earth-Surface Processes

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