Geologic evolution of Hess Rise, central North Pacific Ocean

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doi: 10.1130/0016-7606(1983)94<1289:GEOHRC>2.0.CO;2
Author(s): Vallier, Tracy L.; Dean, Walter E.; Rea, David K.; Thiede, Jörn
Author Affiliation(s): Primary:
U. S. Geol. Surv., Menlo Park, CA, United States
Other:
Univ. Mich., United States
Univ. Oslo, United States
Volume Title: Geological Society of America Bulletin
Source: Geological Society of America Bulletin, 94(11), p.1289-1307. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0016-7606 CODEN: BUGMAF
Note: In English. 61 refs.; illus. incl. 2 anal., 2 tables, sketch maps
Summary: DSDP sites 310, 464, 465, and 466; seismic-reflection profiles. Response of sedimentation to subsidence and northward movement of Hess Rise on the Pacific Plate. Three northwest-trending arms, or ridges, and an east-northeast-trending southern Hess Rise that parallels the Mendocino Fracture Zone. Tholeiitic basalt and alkalic basalt clasts within sediments. A major rock unit is Middle Cretaceous limestone, chalk, and minor chert. Organic-carbon-rich sediments. Sediments from across the Cretaceous-Tertiary boundary show a significant decrease in surface water temperature and biological productivity, and an abrupt increase in transition metals and iridium.—Modified journal abstract.
Year of Publication: 1983
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 07 Marine Geology and Oceanography; Basalts; Bottom features; Cenozoic; Chemically precipitated rocks; Chert; Cores; Cretaceous; DSDP Site 310; DSDP Site 464; DSDP Site 465; DSDP Site 466; Deep Sea Drilling Project; Deep-sea sedimentation; Faults; Fracture zones; Geochemistry; Geophysical methods; Geophysical surveys; Hess Rise; IPOD; Igneous rocks; Iridium; Isotopes; Leg 32; Leg 62; Marine sedimentation; Marine sediments; Mesozoic; Metals; North Pacific; Northwest Pacific; Ocean floors; Oceanography; Organic compounds; Organic materials; Pacific Ocean; Plate tectonics; Plateaus; Platinum group; Reflection methods; Sedimentary rocks; Sedimentation; Sedimentation rates; Sediments; Seismic methods; Stratigraphic boundary; Surveys; Tectonic elements; Tertiary; Tholeiitic basalt; Trace elements; Volcanic rocks; West Pacific
Record ID: 1983058661
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.

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