The radiogenic isotope composition of the high-latitude North Atlantic mantle.

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Mertz D, Haase K
Zeitschrift: Geology
Verlag: Geological Society of America
Jahr der Veröffentlichung: 1997
Band: 25
Seitenbereich: 411-414
ISSN: 0091-7613
Sprache: Englisch


Abstract


New Sr, Nd, and Pb isotope data on North Atlantic high-latitude (about 69°30′N to 76°30′N) intraplate and ridge volcanic rocks, together with published data, are used to evaluate the mantle sources contributing to Iceland and the surrounding ridges. Considerable overlap between Icelandic lavas and depth-filtered North Atlantic mid-oceanic-ridge basalts (MORBs) in all isotope plots confirm that a MORB asthenosphere-plume mixing model can explain the ranges of isotope compositions found on Iceland. Regional isotope patterns north of lat 53°N show two distinct mantle domains. Lavas forming a low-radiogenic-Pb, high-radiogenic-Sr array occur north of central Iceland, whereas volcanic rocks forming a high-radiogenic-Pb, low-radiogenic-Sr array mainly erupt on and south of Iceland. The depleted end members of each array most likely represent MORB source material. The enriched end member of the high-radiogenic-Pb, low-radiogenic-Sr array appears to reside in the Iceland plume. The other enriched end member also occurs in on-axis and mainly intraplate magmas north of about lat 71°N.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Haase, Karsten Prof. Dr.
Lehrstuhl für Endogene Geodynamik


Einrichtungen weiterer Autorinnen und Autoren

Johannes Gutenberg-Universität Mainz


Zitierweisen

APA:
Mertz, D., & Haase, K. (1997). The radiogenic isotope composition of the high-latitude North Atlantic mantle. Geology, 25, 411-414. https://dx.doi.org/10.1130/0091-7613(1997)025<0411:TRICOT>2.3.CO;2

MLA:
Mertz, Dieter, and Karsten Haase. "The radiogenic isotope composition of the high-latitude North Atlantic mantle." Geology 25 (1997): 411-414.

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