(Table T1) Iridium concentration in ODP Site 177-1090 sediments

Anomalous concentrations of Ir have been found in upper Eocene sediments from Ocean Drilling Program (ODP) Hole 1090B. Clear and dark-colored spherules that are believed to be microtektites and clinopyroxene-bearing microkrystites, respectively, were found in the samples with highest Ir. The peak Ir...

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Bibliographic Details
Main Author: Kyte, Frank T
Format: Dataset
Language:English
Published: PANGAEA 2001
Subjects:
177-1090B
DEPTH
sediment/rock
DRILL
Drilling/drill rig
DSDP/ODP/IODP sample designation
Element analysis
neutron activation (NAA)
Iridium
Joides Resolution
Leg177
Ocean Drilling Program
ODP
Sample code/label
South Atlantic Ocean
Maude
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.787341
https://doi.org/10.1594/PANGAEA.787341
Description
Summary:Anomalous concentrations of Ir have been found in upper Eocene sediments from Ocean Drilling Program (ODP) Hole 1090B. Clear and dark-colored spherules that are believed to be microtektites and clinopyroxene-bearing microkrystites, respectively, were found in the samples with highest Ir. The peak Ir concentration in Sample 177-1090B-30X-5,105-106 (954 pg/g) and the net Ir fluence (14 ng/cm**2) at this site are higher than at most other localities except for Caribbean site RC9-58. The Ir anomaly and impact debris are probably correlative with similar deposits found at ODP Site 689 on the Maude Rise and at other localities around the world.

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