TY - JOUR
T1 - Fractionation of abyssal tholeiites
T2 - Samples from the oceanographer Fracture Zone (35°N, 35°W)
AU - Shibata, T.
AU - Fox, P. J.
N1 - Funding Information:
We thank Professors A. Miyashiro and S. DeLong of the State University of New York at Albany, R. Kay and I. Ridley of Lamont-Doherty Geological Observatory, and Dr. W. Bryan of Woods Hole Oceanographic Institution for reading the manuscript and making suggestions. We also thank the reviewers for their comments. Dr. F. Shido provided assistance and guidance in the laboratory during our analytical work. We thank Captain H. Kohler, the officers and crew of the R/V "Vema" for aiding in the collection of these samples. Support for this research came from the National Science Foundation, Grants NSF-GA27281 (P.J.F.), NSF-GA29460 (P.J.F.), NSF-A020742-001 to A. Miyashiro (T.S.), and the Office of Navel Research, Grant N00014-G7-A-0004 (P.J.F.).
PY - 1975/8
Y1 - 1975/8
N2 - Chemical analyses of 48 fresh abyssal tholeiite specimens sampled from two dredge localities clearly define systematic chemical differences which indicate a moderate iron-enrichment trend of fractionation oblique to the FeO* * Tholeiites found on the ocean floor were originally called oceanic tholeiites [1]. Later, investigators used this term to describe tholeiites from oceanic islands as well as the ocean floor, although the tholeiites from these contrasting settings have chemistries which are distinctly different. We prefer the term abyssal tholeiite [2] and use it throughout.-MgO side of the AFM diagram. This magma evolution results in significant changes in elemental abundances of K2O, P2O5 and TiO2. These results suggest that fractionation may be important in controlling the chemistry of abyssal tholeiites along sections of the mid-oceanic ridge.
AB - Chemical analyses of 48 fresh abyssal tholeiite specimens sampled from two dredge localities clearly define systematic chemical differences which indicate a moderate iron-enrichment trend of fractionation oblique to the FeO* * Tholeiites found on the ocean floor were originally called oceanic tholeiites [1]. Later, investigators used this term to describe tholeiites from oceanic islands as well as the ocean floor, although the tholeiites from these contrasting settings have chemistries which are distinctly different. We prefer the term abyssal tholeiite [2] and use it throughout.-MgO side of the AFM diagram. This magma evolution results in significant changes in elemental abundances of K2O, P2O5 and TiO2. These results suggest that fractionation may be important in controlling the chemistry of abyssal tholeiites along sections of the mid-oceanic ridge.
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U2 - 10.1016/0012-821X(75)90161-2
DO - 10.1016/0012-821X(75)90161-2
M3 - Article
AN - SCOPUS:0005690295
VL - 27
SP - 62
EP - 72
JO - Earth and Planetary Sciences Letters
JF - Earth and Planetary Sciences Letters
SN - 0012-821X
IS - 1
ER -