Mechanisms for Growth of Marine Ferromanganese Nodules.
نویسندگان
چکیده
منابع مشابه
Minor Element Geochemistry of Lakemichigan Ferromanganese Nodules
Samples of ferromanganese nodules from several localities in Lake Michigan have been analyzed for their minor element content utilizing neutron activation techniques. The thorium and uranium levels in Lake Michigan nodules exhibit marked dissimilarities with marine nodules. The radium content of these freshwater nodules is substantially higher than the reported marine values. The concentrations...
متن کاملReply to Boudreau: Morphologic expression of ferromanganese nodules
The statement that nodule formation, especially morphology, can be predicted by the Boudreau diagenetic model led us to state that ‘‘diagenetic models that claim to predict nodule growth rate and morphologies from elemental concentrations (1) are not verified by our data’’ for Second Connecticut Lake (SCL), New Hampshire (2). Comments on metal gradients and elemental concentration of manganese ...
متن کاملMicrobial communities associated with ferromanganese nodules and the surrounding sediments
The formation and maintenance of deep-sea ferromanganese/polymetallic nodules still remains a mystery 140 years after their discovery. The wealth of rare metals concentrated in these nodules has spurred global interest in exploring the mining potential of these resources. The prevailing theory of abiotic formation has been called into question and the role of microbial metabolisms in nodule dev...
متن کاملUltrafine - scale magnetostratigraphy of marine 1 ferromanganese crust
12 Hydrogenetic ferromanganese crusts are iron-manganese oxide chemical 13 precipitates on the seafloor that grow over periods of tens of millions of years. Their 14 secular records of chemical, mineralogical, and textural variations are archives of deep15 sea environmental changes. However, environmental reconstruction requires reliable 16 high-resolution age dating. Earlier chronological meth...
متن کاملThe hydrothermal component in ferromanganese nodules from the southeast Pacific Ocean
Statistical analyses of geochemical data from ferromanganese nodule samples representing a broad area of the southeast Pacific Ocean indicate nodule compositions are controlled by four factors: (1) suboxic diagenesis; (2) oxic diagenesis; (3) hydrogenous precipitation; and (4) hydrothermal precipitation. The first three are identical to those identified in studies of nodules from the North Paci...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Oceanography in Japan
سال: 1996
ISSN: 0916-8362,2186-3105
DOI: 10.5928/kaiyou.5.311