Stable isotope organic chemistry of ODP Leg 105 sites

Stable carbon and nitrogen isotopic compositions as well as organic carbon and total nitrogen contents are reported for Site 645 in Baffin Bay and Sites 646 and 647 in the Labrador Sea. Both low-resolution analyses (1 sample/section) and high-resolution results (up to 7 samples/section) are presente...

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Bibliographic Details
Main Author: Macko, Stephen A
Format: Other/Unknown Material
Language:English
Published: PANGAEA 1989
Subjects:
105-645A
105-645B
105-645C
105-645D
105-645E
105-645F
105-645G
105-646A
105-646B
105-647A
105-647B
Baffin Bay
DRILL
Drilling/drill rig
Joides Resolution
Labrador Sea
Leg105
North Atlantic Ocean
Ocean Drilling Program
ODP
Baffin
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.744831
https://doi.org/10.1594/PANGAEA.744831
Description
Summary:Stable carbon and nitrogen isotopic compositions as well as organic carbon and total nitrogen contents are reported for Site 645 in Baffin Bay and Sites 646 and 647 in the Labrador Sea. Both low-resolution analyses (1 sample/section) and high-resolution results (up to 7 samples/section) are presented. These records indicate that large-scale changes in productivity since the middle Miocene have occurred in Baffin Bay. Such changes are not evident in samples from the Labrador Sea. Isotopic records of all the sites are influenced strongly by rapidly changing influxes that combine terrigenous debris with planktonic production. In parts of the cores, relationships to other phenomena, such as ice stages, are present. However, these correlations are not common and indicate that these events were masked by the dynamic changes in sources of organic matter occurring in this complex system.

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