The Central Atlantic Magmatic Province
Insights From Fragments of Pangea
Geophysical Monograph Series (Series Nr. 136)
1. Edition January 2003
276 Pages, Hardcover
Wiley & Sons Ltd
Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 136.
A singular event in Earth's history occurred roughly 200 million years ago, as rifting of the largest and most recent supercontinent was joined by basaltic volcanism that formed the most extensive large igneous province (LIP) known. A profound and widespread mass extinction of terrestrial and marine genera occurred at about the same time, suggesting a causal link between the biological transitions of the Triassic-Jurassic boundary and massive volcanism. A series of stratigraphic, geochronologic, petrologic, tectonic, and geophysical studies have led to the identification of the dispersed remnants of this Central Atlantic Magmatic Province (CAMP) on the rifted margins of four continents. Current discoveries are generally interpreted to indicate that CAMP magmatism occurred in a relative and absolute interval of geologic time that was brief, and point to mechanisms of origin and global environmental effects. Because many of these discoveries have occurred within the past several years, in this monograph we summarize new observations and provide an up-to-date review of the province.
Willis E. Hames, J. Gregory McHone, Paul R. Renne, and Carolyn
Ruppel vii
Introduction
W. Hames, J. G. McHone, P. Renne, and C. Ruppel 1
Cyclo-, Magneto-, and Bio-Stratigraphic Constraints on the
Duration of the CAMP Event and its
Relationship to the Triassic-Jurassic Boundary
Paul E. Olsen, Dennis V. Kent, Mohammed Et-Touhami, and John
Puffer 7
Relative Timing of CAMP, Rifting, Continental Breakup, and Basin
Inversion: Tectonic Significance
Roy W. Schlische, Martha Oliver With jack, and Paul E. Olsen
33
Age Estimates of the Seaward-Dipping Volcanic Wedge, Earliest
Oceanic Crust, and Earliest
Drift-Stage Sediments Along the North American Atlantic Continental
Margin
Richard N. Benson 61
Critical Evaluation of 40Ar/39Ar Ages for the Central Atlantic
Magmatic Province: Timing,
Duration and Possible Migration of Magmatic Centers
Ajoy K. Baksi 77
The Central Atlantic Magmatic Province (CAMP) in Brazil:
Petrology, Geochemistry, 40Ar/39Ar Ages,
Paleomagnetism, and Geodynamic Implications
Angelo De Min, Enzo M. Piccirillo, Andrea Marzoli, Giuliano
Bellieni, Paul R. Renne, Marcia Ernesto, and Leila S.
Marques 91
Paleomagnetic and Geochemical Constraints on the Timing and
Duration of the
CAMP Activity in Northeastern Brazil
M. Ernesto, G. Bellieni, E. M. Piccirillo, I. S. Marques, A. De
Min, I. G Pacca, G. Martins, and, W. P. Macedo 129
A Reactivated Back-arc Source for CAMP Magma
John H. Puffer 151
Temporal Chemical Variations Within Lowermost Jurassic
Tholeiitic Magmas
of the Central Atlantic Magmatic Province
Vincent J. M. Salters, P. C. Ragland, W. E. Hames, K. Milla, and
C. Ruppel 163
The Late Triassic-Early Jurassic Volcanism of Morocco and
Portugal in the Framework
of the Central Atlantic Magmatic Province: An Overview
Nasrrddine Youbi, Lfnia Tavares Martins, Jose Manuel Munha,
Hassan Ibouh, Jose Madeira,
El Houssaine Ait Chayeb, and Abdelmajid El Boukhari 179
The Northernmost CAMP: 40Ar/39Ar Age, Petrology and Sr-Nd-Pb
Isotope Geochemistry
of the Kerforne Dike, Brittany, France
Fred Jourdan, Andrea Marzoli, Herve Bertrand, Michael Cosca, and
Denis Fontignie 209
Magma Flow Pattern in the North Mountain Basalts of the 200 Ma
CAMP Event:
Evidence From the Magnetic Fabric
Richard E. Ernst, Jelle Zeilinga de Boer, Peter Ludwig, and
Taras Gapotchenko 227
Volatile Emissions From Central Atlantic Magmatic Province
Basalts: Mass Assumptions
and Environmental Consequences
J. Gregory McHone 241
Volcanism of the Central Atlantic Magmatic Province as a
Potential Driving Force
in the End-Triassic Mass Extinction
Jozsef Palfy 255
