Skip to Main Content
Book Chapter

Marine Techniques

By
C. Hans Nelson
C. Hans Nelson
Search for other works by this author on:
Published:
January 01, 1984

Abstract

A number of modern marine geologic techniques are available for the study of modern deep-sea fan environments. These techniques fall into several basic categories, including (1) acoustic techniques to map the sea-floor bathymetry, the sea floor surface, and define subsurface acoustic reflectors, (2) surface and subsurface sampling techniques, and (3) methods to assess environmental parameters of deep-sea-fan deposition. Modern environmental conditions can be assessed using current meters, suspended sediment measuring devices, and biological sampling techniques. General morphology of deep-sea fans can be studied by echo sounding techniques, TV cameras with videotape recording, and bottom photography (Fig. 2-1). Deep-sea-fan stratigraphy and lithology can be studied by continuous seismic profiling, coring, and deep-sea drilling. These techniques have been used to understand the near-surface environment and sedimentary processes of modern deep-sea fans. Although we know near-surface facies for different modern fan environments, the lateral and vertical continuity and three-dimensional lithofacies of modern systems is poorly known. This results in the lack of an adequate data base to make good comparisons of the modern deep-sea-fan environments with comparable information from ancient deep-sea fan rock sequences.

Echo-sounding techniques (3.5-12 kHz) have been used for several decades to define submarine bathymetry and outline deep-sea fans, fan valleys, and deep-sea channels (Fig. 2-lA) (Menard, 1955). At the lower frequencies, there often is some subsurface penetration as well as the collection of accurate bathymetric profiles. Recently, SEABEAM, a multi-beam precision echo-sounding techniques coupled with onboard, real-time processing and generation of bathymetric charts has been applied to submarine canyon

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables

Contents

SEPM Short Course Notes

Modern and Ancient Deep-Sea Fan Sedimentation

C. Hans Nelson
C. Hans Nelson
Search for other works by this author on:
Tor H. Nilsen
Tor H. Nilsen
Search for other works by this author on:
SEPM Society for Sedimentary Geology
Volume
14
ISBN electronic:
9781565762435
Publication date:
January 01, 1984

GeoRef

References

Related

A comprehensive resource of eBooks for researchers in the Earth Sciences

This Feature Is Available To Subscribers Only

Sign In or Create an Account

This PDF is available to Subscribers Only

View Article Abstract & Purchase Options

For full access to this pdf, sign in to an existing account, or purchase an annual subscription.

Subscribe Now