cover

Manganese nodules and sediments in the equatorial North Pacific Ocean

"Sonne" Cruise SO 25, 1982

Hrsg.: Ulrich von Stackelberg; Helmut Beiersdorf

1988. 403 Seiten, 111 Abbildungen, 40 Tabellen, 46 Tafeln, 17x24cm, 1210 g
Language: Deutsch

(Geologisches Jahrbuch Reihe D, Band D 87)

ISBN 978-3-510-96104-7, brosch., price: 104.00 €

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Contents

Abstract top ↑

Three areas in the equatorial North Pacific were surveyed and sampled in detail during a research cruise SO 25 of R/V SONNE in October and November 1982. These areas were selected using the results of various proceeding cruises of West German research groups.

In this volume we present the interpretation of a bathymetric and reflection seismic survey, of sedimentological, geochemical and radiometrical studies of deep-sea sedimentation and of investigations of the growth structure, mineralogy, chemistry and micropaleontology of surface manganese nodules and buried nodules. The relationship between nodule formation and sedimentary processes in the equatorial North Pacific Ocean is discussed and compared with nodules from the Central Pacific basins.

Sedimentary hiatuses during the Neogene played a significant role in the initial formation of manganese nodules. The further nodule growth is mainly determined by the sedimentary accumulation rate, the geochemical environment, the supply or decomposition of organic matter and the degree of bioturbation. From site to site these conditions differ and explain the great local variability of nodule types. During the long time span of the nodule growth their general facies also changed according to the movement of the Pacific plate.

Buried nodules provide information about the early stages of growth of surface nodules.

Contents top ↑

ULRICH VON STACKELBERG, HELMUT BEIERSDORF & VOLKHER RIECH:
Outline of SONNE Cruise SO 25 in the Equatorial North Pacific Ocean 3
HELMUT BEIERSDORF:
Interpretation of Seafloor Relief and Acoustic Facies in the
Clarion-Clipperton Block Southeast of Hawaii in Terms of Depositional,
Diagenetic, and Tectonic Processes 27
VOLKHER RIECH & RITA VON GRAFENSTEIN
Sedimentological and Geochemical Trends in Deep-sea Sedimentation of
the Clarion-Clipperton Block Southeast of Hawaii since the Early
Miocene 71
AUGUSTO MANGINT & ULRIKE KÜHNEL:
Depositional History in the Clarion-Clipperton Zone during the last
250,000 years - 230Th and 23iPa Methods 105
ULRICH VON STACKELBERG & VESNA MARCHIG:
Manganese Nodules from the Equatorial North Pacific Ocean 123
ULRICH VON STACKELBERG
Pumice and Buried Manganese Nodules from the Equatorial North Pacific
Ocean 229
AKIRA USUI & NAOKI MITA:
Comparison of Manganese Nodules from the Northeast Equatorial Pacific
(Cruise SO 25) with Nodules from the Central Pacific Basin 287
MARIE-CHRISTINE JANIN:
Micropaleontology of Manganese Nodules from the Equatorial North Pacific
Ocean - Area SO 25-1 and SO 25-3 315
ULRICH VON STACKELBERG, HELMUT BEIERSDORF & VOLKHER RIECH:
Relationship between Manganese Nodule Formation and Sedimentary Processes
in the Equatorial North Pacific Ocean. - A Synthesis Based on the Results of
Cruise SO 25 (1982) with RV Sonne 377