Organic Geochemistry of Deep Sea Drilling Project Cores from Legs 63 to 66—A Synthesis of Sources, Preservation, and Maturation of Organic Matter in Quaternary and Neogene Sediments from an Active Continental Margin
Published:January 01, 1991
Bernd R.T. Simoneit, 1991. "Organic Geochemistry of Deep Sea Drilling Project Cores from Legs 63 to 66—A Synthesis of Sources, Preservation, and Maturation of Organic Matter in Quaternary and Neogene Sediments from an Active Continental Margin", The Gulf and Peninsular Province of the Californias, J. Paul Dauphin, Bernd R. T. Simoneit
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The Deep Sea Drilling Project (DSDP) drilled four legs on the continental margins of California and Mexico. Organic matter in Quaternary to Neogene sediments from the continental margin off California and Baja California, DSDP Leg 63, was analyzed in terms of sources and preservation. The lipids and kerogen are derived from both terrigenous and marine autochthonous inputs and have experienced normal geothermal maturation.
The organic matter in Quaternary to Pliocene sediments from the Gulf of California, DSDP Legs 64 and 65, is derived primarily from terrigenous sources at the mouth of the Gulf and from mixed marine and terrigenous origins in the central Gulf. The lipids and kerogen have undergone normal maturation at depth, except in the central Gulf of California, where at Site 477 rapid hydrothermal maturation is observed.
Organic matter in Quaternary sediments from the Middle America Trench and Mexican Continental Margin, DSDP Leg 66, contains lipids and kerogen which indicate primarily terrigenous influx with oxic depositional conditions. A synthesis of the data on organic matter in cores from Legs 63 to 66 is presented here to serve as an overview and review.
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The Gulf and Peninsular Province of the Californias
The Gulf of California is an excellent laboratory for studying sedimentary processes on time scales that are not resolvable in the open ocean. The high biological productivity and the unique physical character of the gulf combine to produce sedimentological processes that preserve annual phenomena. This volume is organized into six sections. Part 1 covers historical exploration of the area. Part 2 includes 5 chapters detailing information contained on the 5 fold-out maps that accompany the volume. Part 3 consists of chapters on regional geophysics and geology. Part 4 covers satellite geodesy. Part 5's seven chapters discuss physical oceanograpy, primary productivity, and sedimentology. Part 6 covers hydrothermal processes.