995 resultados para Reconnaissance fragmentée


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The research cruise SO79 with RV SONNE (April 18 to June 09 1992) aimed to assess the impact of a potential mining activity on the sensitive deep-sea ecosystem of the Peru Basin. Up to now only results of reconnaissance surveys of the extended manganese nodule field discovered in 1978 in the Peru Basin are available. The hydroacoustic, sedimentological, and geochemical studies on data and sample material of SO79 came to the following results: a small-scaled variation in thickness respectively type of surface sediments shown by the sediment echosounder respectively the side-scan-sonar is assumably due to variations in deposition or erosion. The composition of sediments is controlled by climatic cycles of different length which were caused by the variable influence of glaciation of the northern hemisphere. We think that during the quaternary a deep-water circulation reduced in intensity and O2-content may have produced a suboxic diagenetic environment which led to a remobilization and redeposition of Mn forming manganese nodules in the oxic surface sediments. Near the distinct redox boundary at about 10 cm depth the growth conditions for nodules are extremely favourable. Due to the great variability of sediments the impact of deep-sea mining will be highly variable and the disturbance of the seafloor will change the ecosystem considerably.

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A reconnaissance study of alkenone stratigraphy for the past 35 m.y. in the northern South China Sea (SCS) using sediments from Sites 1147 and 1148 of Ocean Drilling Program (ODP) Leg 184 has been completed. Alkenones were not detected in sediment samples older than ~31 Ma. However, C37:2 appeared in the sedimentary record between ~8 and 31 Ma and both C37:2 and C37:3 were present between 0 and 8 Ma. These changes in alkenone occurrences may signal a response to global-scale Neogene cooling as well as to monsoon intensification and sea level changes over time as a result of Himalayan uplift and the opening of the SCS. Alternatively, they may be related to an evolutionary record of the development of temperature control on alkenone production in coccolithophores. The Uk'37 index for 0-8 Ma produces sea-surface temperatures (SST) of 19°-26°C, which are in the range of previously determined glacial-interglacial values for the northern SCS. Before the late Pleistocene (~1.2 Ma), the SST range is between 23° and 26°C with less variation. This change in variability may signify the early stage of intensified winter monsoons where cold wind and waters from the north may not yet have had a significant effect on SST or it may be the evolutionary link between the early development of unsaturated alkenones in coccolithophores and modern temperature control of alkenone production. We believe a long-term alkenone record is useful for further understanding of global-scale neogene cooling, the development of the East Asian monsoon system, and the evolutionary development of temperature control on alkenone unsaturation. Our data indicate that a high-resolution Uk'37 record for at least the last ~8 Ma is feasible for the northern SCS.

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Translation of Reconnaissance report upon proposed system of Bolivian railways.

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Mode of access: Internet.

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Includes bibliographical references (v.2: p. 643-649).

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1. t. 1.abt. Biographie. Uebersetzungen. 2. abt. Stimme der völker; volkslieder, nebst untermischten andern stücken. 2. t. Cid. Paramythien. Blätter der vorzeit und Jüdische parabeln. Legenden. Admetus haus. Gedichte. 3. t., 1. abt. Fragmente über die neuere deutsche litteratur. 2. abt. Kritische wälder I. Briefwechsel über Ossian u.s.w. Shakespear. Von ähnlichkeit der mittl englischen und deitschen dichtkunst. Plastik. Winckelmann. Lessing. 4 t. 1-3. abt. Ideen zur philosophie der geschichte der menscheit. 5. t., 1 abt. Briefe zur beförderung der humanität (auswahl) .

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"This publication supersedes TM30-245, NAVWEPS 10-35-610 and AFM 200-50 dated April 1954."

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Bd.1. Gedichte.--Bd.2. Apologie von Friedrich Schiller. Dialogen. Monologen. Predigtfragment. Die Christenheit oder Europa. Journale und Tagebücher. Fragmente.--Bd.3. Fragmente.--Bd.4. Die Lehrlinge zu Saïs. Heinrich von Ofterdingen.

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v. 1-3. Der Messias -- v. 4-5. Oden -- v. 6. Der tod Adams Hermanns schlacht. David. Hermanns tod -- v. 7. Salomo. Hermann und die fürsten -- v. 8. Die deutsche gelehrtenrepublik -- v. 9. Grammatische gespräche. Fragmente über die deutsche sprache -- v. 10. Vermischte schriften.

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v. 1. Reisebilder. -- v. 2. Buch der lieder. -- v. 3. Deutschland. -- v. 4. Deutschland. Romancero & letzte gedichte. -- v. 5. Novellistische fragmente; Französischezustände. -- v. 6. -- Shakespeare's madchen & frauen; Vermischte schriften; Ludwig Borne; Memoiren; Das Leben Heine's.

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"Die XII Tafel-Fragmente": Bd. 1, p. [691]-737.

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Imprint varies.

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Each vol. has both general and special t.-p.

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Volumes 12-21 have imprint: Leipzig, G. J. Göschen; v. 22: Berlin und Leipzig, G. J. Göschen; v. 23: Berlin und Leipzig, W. de Gruyter & co.