A mid-ocean ridgeis an underwater mountain range formed by tectonic plates moving apart (divergent plate boundaries). As the plates separate, magma rises from the mantle, solidifies, and creates new oceanic crust, gradually building the ridge.These ridges are found in every ocean and are key ...
Define mid-ocean ridge. mid-ocean ridge synonyms, mid-ocean ridge pronunciation, mid-ocean ridge translation, English dictionary definition of mid-ocean ridge. n. 1. Any of various underwater mountain ranges forming a chain that extends almost continuous
Seismic character of volcanic activity at the ultraslow-spreading Gakkel Ridge. Geology 29, 1139–1142 (2001). Article ADS Google Scholar Skolotnev, S. G. et al. Crustal accretion along the northern Mid Atlantic Ridge (52°–57°N): preliminary results from expedition V53 of R/V Akademik...
Hamilton, The geology and geochemistry of Isla Marchena, Gala´pagos Archipelago: An ocean island adjacent to a mid-ocean ridge, J. Volcanol. Geotherm. Res., 40, 291 - 315, 1990.Vicenzi, E. P., McBirney, A. R., White, W. M. & Hamilton, M. (1990). The geology and ...
Paul J.Wallace, inEncyclopedia of Geology (Second Edition), 2021 Mid-Ocean Ridge Basalts Normal mid-ocean ridgebasalts(N-MORB) have low H2O contents, typically <0.4wt% (Fig. 9). Enriched MORB (E-MORB) have higher concentrations, up to 1.5wt%. Water concentrations in comagmatic suites of...
Figure 2 | Geology of the Eastern Mohns Ridge. (a) Map showing: (1) the 30-km-long AVR hosting the vent field; (2) core complexes at the western flank of the ridge; and (3) the eastern flank that is buried by the distal parts of the Bear Island sedimentary fan, which developed ...
mid-ocean ridge (geology) 大西洋中脊 Dà xī yáng zhōng jǐ Atlantic mid-ocean ridge Are you Studying Chinese? Become fluent in Chinese by watching Chinese videos in a video player designed for language learners. Try Yabla NowFind out more ...
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…they are referred to as mid-ocean-ridge basalt (MORB). They are subalkaline tholeiites that contain olivine in the norm and less than 0.25 percent potash. The chemistry suggests that MORB was generated from a mantle that was depleted of volatile elements (e.g.,lanthanum [La], cerium [...
Ultra-basic Rocks of Markov Basin,Midoceanic Ridge Valley of the Atlantic Ocean俄罗斯科考船"尼古拉·斯特拉霍夫院士"号和"依奥非院士"号在若干航次中,于大西洋中脊裂谷马尔科夫海盆西坡和东坡(5.30.6'-5.32.4'N,塞拉里昂海以台)上,采集到海洋岩石圈具有完整剖面特征的岩石:地幔厚地超基性岩、各种辉长岩类、...