Neogene evolution of the Pedro Channel carbonate system, northern Nicaragua Rise

Author(s): Cunningham, Andrew D.; Droxler, André W.
Author Affiliation(s): Primary:
Amoco Exploration and Production, Houston, TX, United States
Rice University, United States
Volume Title: American Association of Petroleum Geologists 1999 annual meeting
Source: Annual Meeting Expanded Abstracts - American Association of Petroleum Geologists, Vol.1999, p.A28; American Association of Petroleum Geologists 1999 annual meeting, San Antonio, TX, Apr. 11-14, 1999. Publisher: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States. ISSN: 0094-0038 CODEN: APGAB2
Note: In English
Summary: The northern Nicaragua Rise, stretching from the east coast of Honduras and Nicaragua to the island of Jamaica, morphologically consists of several isolated carbonate banks and shelves, covered on average by 30 m of water depth and separated by deep channels. Some fossil banks are observed on high resolution seismic profiles in the channel subseafloor, especially on the north part of Pedro Channel and Walton Basin. Pedro Channel is the deepest, centralmost seaway on the northern Nicaragua Rise. A revised bathymetric map of Pedro Channel illustrates a seafloor dissected by numerous canyons and gullies as well as portions of a drowned carbonate bank with keep-up bank morphology. Visual correlation of synthetic seismograms for ODP Site 1000, drilled in the middle of Pedro Channel, with SCS data indicates a good correlation of seismic facies with various lithologic intervals. An interpretation of SCS and MCS data reveals that periplatform sedimentation has dominated Pedro Channel from the early Miocene to recent. Dredge haul analysis suggests that a neritic carbonate bank drowned partially in the middle Oligocene and finally in the early Miocene. Erosion affects the southern margin of this drowned bank in the middle Miocene. Faults in Pedro Channel illustrate characteristics typical of sinistral strike-slip faults including vertical to subvertical faults, faults that splay upward, forced folds, and linear fault traces in map view. Two episodes of faulting (25-21 Ma and 16-8 Ma) are recorded in the formation of mini-basin in the southern part of Pedro Channel.
Year of Publication: 1999
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 16 Structural Geology; Atlantic Ocean; Bathymetry; Biogenic structures; Carbonate banks; Caribbean Sea; Cenozoic; Faults; Folds; Geophysical methods; Geophysical profiles; Geophysical surveys; Lateral faults; Left-lateral faults; Neogene; Nicaragua Rise; North Atlantic; Ocean floors; Pedro Channel; Sedimentary structures; Seismic methods; Seismic profiles; Strike-slip faults; Submarine canyons; Surveys; Tertiary; Walton Basin
Record ID: 2000017778
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States

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