arboretum
发表于 2025-3-23 10:59:07
Manganese Nodule Deposits in the Central Pacific Basin: Distribution, Geochemistry, Mineralogy, and400 bottom samplings, 900 sea-bed photographs, 1000 chemical analyses, and 800 mineral analyses, together with relevant seismic profiling and sediment stratigraphy obtained during a 10-year research program of the Geological Survey of Japan. The manganese nodules of this area are formed through two
chondromalacia
发表于 2025-3-23 17:49:33
Chemistry and Mineralogy of Ferromanganese Deposits from the Equatorial Pacific Ocean, report the geochemistry and mineralogy of ferromanganese crusts and seamount nodules only. Samples were collected from flanks, gentle slopes, and nearly flat summits; nodules were absent from the steeper slopes. Cobalt, the metal of highest commercial interest, ranges between 0.19% and 1.90% by wei
cinder
发表于 2025-3-23 18:15:41
Geochemistry and Mineralogy of Ferromanganese Nodules from the Kiribati Region of the Eastern Centrted in water depths ranging from 5400 to 5525 m from a rough seabed consisting dominantly of brown biosiliceous clay..The eight successful bottom samplings used free-fall grabs and revealed two characteristic nodule types. The dominant nodules in the survey area were small to medium, intergrown, and
ANT
发表于 2025-3-24 01:37:17
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Bombast
发表于 2025-3-24 04:55:27
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prostatitis
发表于 2025-3-24 09:40:24
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颠簸地移动
发表于 2025-3-24 12:39:06
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行为
发表于 2025-3-24 15:07:07
,Die innere Geometrie von Flächen,ere made in the Tuamotus in 1840–1841 by E. Belcher and R. E. Johnson. The prevailing belief was that atoll reefs were superficial veneers on the rims of volcanic craters. Specific knowledge of ocean depths surrounding atolls was lacking. The boring technology then available (for drilling water well
门窗的侧柱
发表于 2025-3-24 20:14:01
,Differentialgeometrie der Kurven in ℝ, age estimates for most of the undated seamounts by comparing their paleomagnetic poles to the Pacific apparent polar wander path. According to their locations along the polar path, seamount paleopoles were divided into four groups: (1) early Tertiary, about 36–45 Ma; (2) Late Cretaceous, 64–79 Ma;
FER
发表于 2025-3-25 02:23:56
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