Neural network interpretation of LWD data (ODP Leg 170) confirms complete sediment subduction at the Costa Rica convergent margin

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doi: 10.1016/S0012-821X(99)00270-8
Author(s): Moritz, Erik; Bornholdt, Stefan; Westphal, Hildegard; Meschede, Martin
Author Affiliation(s): Primary:
Universität Tübingen, Institut für Geologie und Paläontologie, Tubingen, Federal Republic of Germany
Universität Kiel, Federal Republic of Germany
University of Miami, United States
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, 174(3-4), p.301-312. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. 25 refs.; illus., incl. sect., 2 tables, sketch map
Summary: The internal structure of a convergent plate boundary was the focus of ODP Leg 170 in 1996 at the subduction zone off Costa Rica. Although the structure of the subduction zone is rather well known from seismic surveys, prior to drilling of ODP Leg 170 it was a matter of discussion whether it is accretionary or non-accretionary. With a neural network approach, we confirm the evidence gained during drilling of Leg 170, that at least presently no lower-plate sediments are transferred to the upper plate by accretion. To supplement lithological information, Logging-While-Drilling geophysical data have been included in this study and were interpreted in terms of lithology using a genetically trained artificial neural network. Abstract Copyright (2000) Elsevier, B.V.
Year of Publication: 2000
Research Program: ODP Ocean Drilling Program
Key Words: 18 Geophysics, Solid-Earth; Central America; Cocos Plate; Continental margin; Costa Rica; Downhole methods; East Pacific; Geophysical methods; Geophysical profiles; Geophysical surveys; High-resolution methods; Leg 170; Lithostratigraphy; Measurement-while-drilling; Neural networks; ODP Site 1039; ODP Site 1040; ODP Site 1043; Ocean Drilling Program; Pacific Ocean; Plate convergence; Plate tectonics; Seismic profiles; Subduction; Subduction zones; Surveys
Coordinates: N093800 N094500 W0860500 W0861200
Record ID: 2000012963
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands