Clastic, diagenetic, and metamorphic lithologies of a subsiding continental block: central Peru forearc

Abstract

Some of the more indurated mudstones and cemented carbonates have been extensivly fractured in response to tectonism and dewatering within the forearc basins. Much larger quantities of brecciated carbonates were obtained from the Trujillo Basin than from the Lima Basin, which is consistent with the pervasive brittle deformation evidence in seismic-reflection records of the former basin. Microbrecciated dolomicrite, dredged from the seaward edge of the continental block and the presumed accretionary prism, is cut by multiple generations of cemented fractures. -from Authors