MacLeod, Kenneth G.; Martin, Ellen E.; Blair, Susanna W. (2008): Nd isotopic excursion across Cretaceous Ocean Anoxic Event 2 (Cenomanian-Turonian) in the tropical North Atlantic. Geological Society of America (GSA), Boulder, CO, United States, Geology (Boulder), 36 (10), 811-814, georefid:2008-124482

Abstract:
Late Cretaceous fish debris from Demerara Rise exhibits a dramatic positive excursion of 8 epsilon (sub Nd) units during ocean anoxic event 2 (OAE2) that is superimposed on extremely low epsilon (sub Nd(t)) values (-14 to -16.5) observed throughout the rest of the studied interval. The OAE2 epsilon (sub Nd) excursion is the largest yet documented in marine sediments, and the majority of the shift is estimated to have occurred over <20 k.y. Low background epsilon (sub Nd) values on Demerara Rise are explained as the Nd isotopic signature of the South American craton, whereas eruptions of the Caribbean large igneous province or enhanced mixing of intermediate waters in the North Atlantic could have caused the excursion.
Coverage:
West: -168.1425 East: -54.1200 North: 44.4123 South: 9.1600
Relations:
Expedition: 145
Site: 145-886
Expedition: 171B
Site: 171B-1050
Expedition: 207
Site: 207-1258
Site: 207-1259
Site: 207-1260
Supplemental Information:
With GSA Data Repository Item 2008208
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.1130/G24999A.1 (c.f. for more detailed metadata)
This metadata in ISO19139 XML format