Diagenetic trends in Leg 126 sandstones

Abstract

Early diagenesis in Leg 126 forearc and backarc sands/sandstones is characterized by the dissolution of intermediate to mafic brown glass, the alteration of colorless rhyolitic glass to clay minerals, precipitation of thin clay-mineral rim cements, and minor precipitation of clinoptilolite cements. Later, more intense diagenesis is restricted to Oligocene forearc basin sediments at Sites 787, 792 and 793. In these sections, the effects of early diagenesis have been intensified and overprinted by later diagenetic effects. -from Authors