COMPARISON OF OS ISOTOPE AND BE-10 AGES OF HYDROGENOUS FERROMANGANESE CRUSTS

2017 ◽  
Author(s):  
Kosuke T. Goto ◽  
◽  
Aya Sakaguchi ◽  
Maria Luisa G. Tejada ◽  
Johannes Lachner ◽  
...  
Keyword(s):  
Ferromanganese Crusts ◽  
Os Isotope

Re–Os isotope geochemistry in the surface layers of ferromanganese crusts from the Takuyo Daigo Seamount, northwestern Pacific Ocean

2015 ◽  
Vol 49 (3) ◽  
pp. 233-241 ◽  
Author(s):  
Ayaka Tokumaru ◽  
Tatsuo Nozaki ◽  
Katsuhiko Suzuki ◽  
Kosuke T. Goto ◽  
Qing Chang ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Isotope Geochemistry ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
Surface Layers ◽  
Ferromanganese Crusts ◽  
Os Isotope

MINERALOGY AND GEOCHEMISTRY OF THE Co-RICH FERROMANGANESE CRUSTS FROM THE SOUTH WEST INDIAN RIDGE

2013 ◽  
Vol 33 (6) ◽  
pp. 71
Author(s):  
Zhihua YU ◽  
Dejiang FAN ◽  
Aibin ZHANG ◽  
Xiaoxia SUN ◽  
Zuosheng YANG
Keyword(s):  
West Indian ◽  
The South ◽  
Ferromanganese Crusts ◽  
South West ◽  
Indian Ridge

Relationship between copper tonnage of Chilean base-metal porphyry deposits and Os isotope ratios

Geology ◽  
2000 ◽  
Vol 28 (6) ◽  
pp. 555-558
Author(s):  
Ryan Mathur ◽  
Joaquin Ruiz ◽  
Francisco Munizaga
Keyword(s):  
Base Metal ◽  
Isotope Ratios ◽  
Porphyry Deposits ◽  
Os Isotope

Re-Os isotope characteristics of postorogenic lavas: Implications for the nature of young lithospheric mantle and its contribution to basaltic magmas

Geology ◽  
2000 ◽  
Vol 28 (6) ◽  
pp. 563-566 ◽  
Author(s):  
Bruce F. Schaefer ◽  
Simon P. Turner ◽  
Nick W. Rogers ◽  
Chris J. Hawkesworth ◽  
Helen M. Williams ◽  
...  
Keyword(s):  
Lithospheric Mantle ◽  
Basaltic Magmas ◽  
Os Isotope

Geochemistry of ferromanganese crusts and nodules from the South Tasman Rise, southeast of Australia

1988 ◽  
Vol 84 (1-2) ◽  
pp. 53-80 ◽  
Author(s):  
Barrie R Bolton ◽  
Neville F Exon ◽  
Joe Ostwald ◽  
Herrud R Kudrass
Keyword(s):  
The South ◽  
Ferromanganese Crusts

scholarly journals Deep-sea amphipods around cobalt-rich ferromanganese crusts: Taxonomic diversity and selection of candidate species for connectivity analysis

PLoS ONE ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. e0228483
Author(s):  
Akira Iguchi ◽  
Miyuki Nishijima ◽  
Yuki Yoshioka ◽  
Aika Miyagi ◽  
Ryuichi Miwa ◽  
...  
Keyword(s):  
Deep Sea ◽  
Taxonomic Diversity ◽  
Connectivity Analysis ◽  
Ferromanganese Crusts ◽  
Candidate Species ◽  
Selection Of

New approaches to crustal evolution studies and the origin of granitic rocks: what can the Lu-Hf and Re-Os isotope systems tell us?

1996 ◽  
Vol 87 (1-2) ◽  
pp. 339-352 ◽  
Author(s):  
Clark M. Johnson ◽  
Steven B. Shirey ◽  
Karin M. Barovich
Keyword(s):  
Continental Crust ◽  
Isotope Ratios ◽  
Granitic Rocks ◽  
Nd Isotope ◽  
Volcanic Arcs ◽  
Depleted Mantle ◽  
Os Isotopes ◽  
Isotope System ◽  
Os Isotope

ABSTRACT:The Lu-Hf and Re-Os isotope systems have been applied sparsely to elucidate the origin of granites, intracrustal processes and the evolution of the continental crust. The presence or absence of garnet as a residual phase during partial melting will strongly influence Lu/Hf partitioning, making the Lu–Hf isotope system exceptionally sensitive to evaluating the role of garnet during intracrustal differentiation processes. Mid-Proterozoic (1·1–1·5Ga ) ‘anorogenic’ granites from the western U.S.A. appear to have anomalously high εHf values, relative to their εNd values, compared with Precambrian orogenic granites from several continents. The Hf-Nd isotope variations for Precambrian orogenic granites are well explained by melting processes that are ultimately tied to garnet-bearing sources in the mantle or crust. Residual, garnet-bearing lower and middle crust will evolve to anomalously high εHf values over time and may be the most likely source for later ‘anorogenic’ magmas. When crustal and mantle rocks are viewed together in terms of Hf and Nd isotope compositions, a remarkable mass balance is apparent for at least the outer silicate earth where Precambrian orogenic continental crust is the balance to the high-εHf depleted mantle, and enriched lithospheric mantle is the balance to the low-εHf depleted mantle.Although the continental crust has been envisioned to have exceptionally high Re/Os ratios and very radiogenic Os isotope compositions, new data obtained on magnetite mineral separates suggest that some parts of the Precambrian continental crust are relatively Os-rich and non-radiogenic. It remains unclear how continental crust may obtain non-radiogenic Os isotope ratios, and these results have important implications for Re-Os isotope evolution models. In contrast, Phanerozoic batholiths and volcanic arcs that are built on young mafic lower crust may have exceptionally radiogenic Os isotope ratios. These results highlight the unique ability of Os isotopes to identify young mafic crustal components in orogenic magmas that are essentially undetectable using other isotope systems such as O, Sr, Nd and Pb.

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