期刊
JOURNAL OF AFRICAN EARTH SCIENCES
卷 99, 期 -, 页码 452-462出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jafrearsci.2014.03.003
关键词
Cretaceous; Stable carbon isotopes; Chemostratigraphy; Magnetic polarity stratigraphy; Africa; Atlantic
资金
- National Geographic Society
- Petroleum Research Fund of the American Chemical Society
- Sonangol E.P.
- Esso Angola
- Fundacao Vida of Angola
- LS Films
- Maersk
- Damco
- Safmarine
- ISEM at SMU
- Royal Dutch Embassy in Luanda
- TAP Airlines
- Royal Dutch Airlines
- Saurus Institute
- Perot Museum of Nature and Science
- Yale University
- Alfred Kordelin Foundation
We present the delta C-13 and paleomagnetic stratigraphy for marine strata at the coast of southern Angola, anchored by an intercalated basalt with a whole rock 40Ar/39Ar radiometric age of 84.6 +/- 1.5 Ma, being consistent with both invertebrate and vertebrate biostratigraphy. This is the first African stable carbon isotope record correlated to significant events in the global carbon record spanning the Late Cenomanian to Early Maastrichtian. A positive similar to 3 parts per thousand excursion seen in bivalve shells below the basalt indicates the Cenomanian-Turonian Boundary Event at 93.9 Ma, during Oceanic Anoxic Event 2. Additional excursions above the basalt are correlated to patterns globally, including a negative similar to 3 parts per thousand excursion near the top of the section interpreted as part of the Campanian-Maastrichtian Boundary Events. The age of the basalt ties the studied Bentiaba section to a pulse of Late Cretaceous magmatic activity around the South Atlantic and significant tectonic activity, including rotation, of the African continent. (C) 2014 The Authors. Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据