ISSN:1064-119X    

DOI:10.1080/10641199309379911

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

The slope off Nice (French Riviera) is characterized by the progradation of a large deltaic sedimentary body fed by the Var River. It principally consists of fine‐grained plio‐quaternary deposits interbedded with conglomerates. These deposits are cut by deep valleys and canyons and have been submitted to degradation through active mass‐wasting processes at water depth of 20–500 m. Several sediment facies are differentiated and classified by laboratory‐determined mass physical and geotechnical properties of nineteen gravity core samples. This classification is used in order to produce a geotechnical map of the surficial sediment of the area. The study of consolidation states of these sediments reveals a sedimentary hiatus appearing under Holocene deposits on the eastern wall of the major canyon (Var Canyon) between 900 and 1500 m water depth. This sedimentary hiatus, which extends for several kilometers, corresponds to an erosion surface rather than an omission surface according to the overconsolidated status of the underlying layers. An ancient mass movement corresponding to a translational slide has been detected with an average estimated thickness of 7 m of sediment involved in this mass movement. This approximation is confirmed by the results of the pseudostatic infinite slope stability analysis used to study the regional slope stability, under undrained conditions.

ISSN:1064-119X    

DOI:10.1080/10641199309379912

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

An evaluation of all available manganese nodule and cobalt‐rich crust data in the Exclusive Economic Zone (EEZ) of the Ellice Islands, Republic of Tuvalu, has been carried out.

ISSN:1064-119X    

DOI:10.1080/10641199309379913

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

The documentation work of gravel accumulation is realized in two phases: preliminary and detailed investigation.

ISSN:1064-119X    

DOI:10.1080/10641199309379914

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Manganese nodules were known to exist at the bottom of many of the world's oceans as early as the 1870s. Interest was rekindled in the 1960s when it appeared the world would need new sources of nickel to supply the increasing demand for jet engines, magnets, ovens, heating elements and high quality stainless steel for corrosion resistance. By 1975 there were five consortia working on developing an economical system to tap this resource. This is the account of the “INCO”; consortium, which was the first to retrieve a large quantity of nodules for further tests in their pilot refinery. The article covers the project from the time the author was first charged with “do something about nodules”; to the shut down of the project after its successful completion. The staff and corporate organization is covered as well as exploration methods and a detailed description of each major component of the mining system.

ISSN:1064-119X    

DOI:10.1080/10641199309379915

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Glacial Marine Sedimentation: Paleoclimatic Significance,Edited by J. B. Anderson and G. M. Ashley. GSA Special Paper 261, GSA, Boulder, CO, 1991. 232 pp.

ISSN:1064-119X    

DOI:10.1080/10641199309379916

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:1064-119X    

DOI:10.1080/10641199309379910

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor