High Precision Femtosecond Laser Ablation ICP-MS Measurement of Benthic Foraminiferal Mn-Incorporation for Paleoenvironmental Reconstruction: A Case Study From the Plio-Pleistocene Caribbean Sea


Oegretmen N., Schiebel R., Jochum K. P. , Galer S., Leitner J., Khanolkar S., ...More

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, vol.23, no.10, 2022 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 10
  • Publication Date: 2022
  • Doi Number: 10.1029/2021gc010268
  • Journal Name: GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Compendex, Environment Index, Geobase, INSPEC, Civil Engineering Abstracts
  • Keywords: manganese, Cibicidoides wuellerstorfi, Cibicidoides mundulus, Central American Seaway, trace elements, hydrothermal, paleoproductivity, CENTRAL-AMERICAN SEAWAY, LESSER-ANTILLES, ATLANTIC-OCEAN, EQUATORIAL ATLANTIC, CENOZOIC EVOLUTION, ISLAND-ARC, MANGANESE, SEDIMENTS, WATER, DIAGENESIS
  • Middle East Technical University Affiliated: Yes

Abstract

Closure of the Central American Seaway (CAS) and hydrology of the Caribbean Sea triggered Northern Hemisphere Glaciation and played an important role in the Pliocene to modern-day climate re-establishing the deep and surface ocean currents. New data on Mn/Ca obtained with femtosecond laser ablation inductively coupled plasma mass spectrometry on well-preserved tests of the epibenthic foraminifer Cibicidoides wuellerstorfi and infaunal C. mundulus contribute to the interpretation of paleoenvironmental conditions of the Caribbean Sea between 5.2 and 2.2 Ma (million years) across the closure of the CAS. Hydrothermal activity at the Lesser Antilles may be a primary source of Mn in the well-oxygenated Plio-Pleistocene Caribbean Sea. Incorporation of Mn in the benthic foraminifer shell carbonate is assumed to be affected by surface ocean nutrient cycling, and may hence be an indicator of paleoproductivity.