Latest Paleocene-earliest Eocene cyclostratigraphy; using core photographs for reconnaissance geophysical logging

Author(s): Cramer, Benjamin S.
Author Affiliation(s): Primary:
Rutgers University, Department of Geological Sciences, Piscataway, NJ, United States
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, 186(2), p.231-244. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. 33 refs.; illus., incl. 2 tables
Summary: I present a new method for reconnaissance cyclostratigraphic study of continuously cored boreholes: the generation of detailed sediment color logs by digitizing Ocean Drilling Program (ODP) core photographs. The reliability of the method is tested by comparison with the spectrophotometer color log for the uppermost Paleocene-lowermost Eocene section (Chron C24r) at ODP Hole 1051A. The color log generated from Hole 1051A core photographs is essentially identical to the spectrophotometer log. The method is applied to the Chron C24r section at Holes 1051A and 690B, producing the first high-resolution geophysical log for the latter section. I calculate astronomically calibrated durations between bio- and chemostratigraphic events within Chron C24r by correlating the cyclostratigraphies for Holes 1051A and 690B. These durations are significantly different from previous estimates, indicating that the chronology of events surrounding the Paleocene/Eocene boundary will have to be revised. This study demonstrates that useful geophysical logs can be generated from digitized ODP and DSDP core photographs. The method is of practical use for sections lacking high-resolution logs, as is the case for most lower Paleogene sections. Abstract Copyright (2001) Elsevier, B.V.
Year of Publication: 2001
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Antarctic Ocean; Atlantic Ocean; Blake Nose; Blake Plateau; Case studies; Cenozoic; Chronostratigraphy; Color imagery; Cores; Cyclostratigraphy; Data processing; Digitization; Eocene; High-resolution methods; Imagery; Leg 113; Leg 171B; Lower Eocene; Marine sediments; Maud Rise; North Atlantic; ODP Site 1051; ODP Site 690; Ocean Drilling Program; Paleocene; Paleogene; Photography; Sediments; Southern Ocean; Tertiary; Upper Paleocene; Weddell Sea; Well-logging
Coordinates: S650938 S650937 E0011218 E0011218
N300311 N300311 W0762128 W0762128
Record ID: 2001036211
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands