Intraoceanic islands, east pacific ridge, island arcs: Volcanism and upper mantle
نویسندگان
چکیده
منابع مشابه
Age and Evolution of the Volcanoes of Tutuila , American Samoa 1
Tutuila is a basaltic volcanic island within the east southeasterly trending Samoa Island chain in the Pacific Ocean. Potassium-argon ages on 38 whole rock samples oflavas and intrusives demonstrate that the main period of subaerial volcanism occurred over a relatively short interval of about 0.6 Ma in the Early Pleistocene. The major shield volcano, Pago, was built between about 1.54 and 1.28 ...
متن کاملSponges from Clipperton Island, East Pacific
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متن کاملMid-ocean Ridge Tectonics, Volcanism and Geomorphology
Figure 11 Average depth of magma lens reflections beneath ridges versus spreading rate. The curved line shows the depth to the 12003C isotherm calculated from the ridge thermal model of Phipps Morgan J and Chen YJ (1993) Journal of Geophysical Research 98: 6283}6297. Data from different ridges are labeled Reykjanes Ridge (RR), Juan de Fuca Ridge (JdF), Costa Rica Rift (CRR), Lau Basin (Lau), no...
متن کاملWhole mantle shear structure beneath the East Pacific Rise
[1] We model broadband seismograms containing triplicated S, S, and S along with ScS to produce a pure path one-dimensional model extending from the crust to the core-mantle boundary beneath the East Pacific Rise. We simultaneously model all body wave shapes and amplitudes, thereby eliminating depth-velocity ambiguities. The data consist of western North American broadband recordings of East Pa...
متن کاملMantle dynamics beneath the Pacific Northwest and the generation of voluminous back-arc volcanism
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. [1] The Pacific Northwest (PNW) has a complex tectonic history and over the past $17 Ma has played host to several ...
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ژورنال
عنوان ژورنال: Tectonophysics
سال: 1969
ISSN: 0040-1951
DOI: 10.1016/0040-1951(69)90098-5