Deep seabed rock dredging in areas with high relief

Autor:	David A. Larson, John C. Wiltshire, Charles L. Morgan
Rok vydání:	1994
Předmět:	geography geography.geographical_feature_category business.industry Seamount Sampling (statistics) Shoal Ocean Engineering Geotechnical Engineering and Engineering Geology Oceanography Dredging Current (stream) Mining engineering Global Positioning System Bathymetry business Geology Seabed
Zdroj:	Marine Georesources & Geotechnology. 12:227-236
ISSN:	1521-0618 1064-119X
Popis:	Deep‐seabed dredging has been for more than 125 years and continues today to be the primary tool for sampling deep‐seabed, hard‐substrate environments. Much effort and innovation have been invested in this pursuit to accommodate the varying seabed types and the objectives of the investigators. Little progress has been made, however, during this period to improve the accuracy of locating the samples that are dredged and the efficiency of the technique. With the current availability of high‐resolution, Global Positioning System (GPS) navigation and accurate bathymetric maps in many deep‐seabed areas, considerable improvement in both accuracy and efficiency is possible. The purposes of this study are to examine the techniques used and results obtained using these relatively new tools during a recent expedition that dredged several seamounts at water depths of 1,300 to 2,500 m in the vicinity of Johnston Island in the north‐central Pacific Ocean, and also to test two different dredge designs for their perform...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::959dbd2ec4242d29b954d6ba9d2b43b3 https://doi.org/10.1080/10641199409388264 Zobrazit plný text záznamu