نتایج جستجو برای: morb

تعداد نتایج: 602  

Journal: :Chemical Geology 2017

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Journal: :Journal of Mineralogical and Petrological Sciences 2008

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Journal: :Frontiers in Earth Science 2023

This paper reports the first discovery of basic igneous rocks in Bairin Right Banner southeastern Inner Mongolia, China. To understand genesis and tectonic evolution these rocks, we have carried out geochronology geochemistry research on them. The results show that LA-ICP-MS zircon U-Pb concordant mean ages massive basalt, diabase, pillow basalt are 272.0 ± 2.8 Ma, 261.5 3.2 256.5 2.5 respectiv...

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Journal: :International Geology Review 2021

The Alada? melange is located between Mesozoic Tauride carbonate platform units and the Late Cretaceous Pozant?-Karsant? ophiolite its metamorphic sole. comprises a lower, mainly sedimentary unit, composed of variably disrupted thrust sheets deep-sea sediments, with localized matrix mass-flow turbidity current deposits. upper, volcanic-sedimentary highly basalt-pelagic carbonate-radiolarite uni...

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده علوم پایه 1392
حلیمه مجددی مقدم, علی احمدی, علی اصغر مریدی,

شواهد صحرایی و همراهی سنگ ها به صورت پریدوتیت، گابرو، دیاباز، بازالت و سنگ های رادیولاریتی و شکل بازالت ها به صورت پیلولاوا نشان می دهد که سنگ های مافیک منطقه نصرت آباد واقع در بخش میانی پهنه گسلی نصرت آباد-کهورک، شرق ایران، متعلق به مجموعه های افیولیتی و بازالت های این منطقه از نوع بازالت های رشته های میان اقیانوسی (morb) هستند. عدد منیزیمی نسبتاً کوچک این سنگ ها (69 تا 42)، نشان می دهد که ما...

15 صفحه اول
2018
G.E. Bebout N.R. Banerjee M.R.M. Izawa K. Kobayashi K. Lazzeri L.A. Ranieri E. Nakamura

Observed enrichments of N (and the δ15N of this N) in volcanic glasses altered on Earth's modern and ancient seafloor are relevant in considerations of modern global N subduction fluxes and ancient life on Earth, and similarly altered glasses on Mars and other extraterrestrial bodies could serve as valuable tracers of biogeochemical processes. Palagonitized glasses and whole-rock samples of vol...

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Journal: :The Journal of the American Board of Family Practice 1999
T L Schwenk

MO, Fuhrer J, Satten GA, et a1. Declining morbidity and mortality among patients with advanced immunodeficiency virus infection. N Engl J Med 1998; 338:853-60. 3. Burman"W], Reves RR, Cohn DL. The case for conservative management of early HIV disease. JAMA 1998; 280:93-5. 4. UNAlDS. The Joint United Nations Programme on HIVIAlDS. Report on the global HIVIAlDS epidemic:June 1998. (www.us.unaids....

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2004
R. A. Keller D. W. Graham K. A. Farley R. A. Duncan J. E. Lupton

[1] Helium isotopes are a robust geochemical tracer of a primordial mantle component in hot spot volcanism. The high He/He (up to 35 RA, where RA is the atmospheric He/He ratio of 1.39 10 ) of some Hawaiian Island volcanism is perhaps the classic example. New results for picrites and basalts from the Hawaiian-Emperor seamount chain indicate that the hot spot has produced high He/He lavas for at...

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2007
John M. Eiler John W. Valley Edward M. Stolper

Oxygen isotope ratios of olivine in 23 tholeiites from the Hawaii Scientific Drilling Project (HSDP) core (15 from Mauna Kea, 8 from Mauna Loa) and three samples of outcropping subaerial or dredged submarine Mauna Kea lavas have been measured by laser fluorination. The ~18o values are 4.6-5.4 %o, confirming previous observations that some Hawaiian lavas are derived from sources with ~18o values...

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Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2008
Richard W Carlson Maud Boyet

The detection of excess 142Nd caused by the decay of 103Ma half-life 146Sm in all terrestrial rocks compared with chondrites shows that the chondrite analogue compositional model cannot be strictly correct, at least for the accessible portion of the Earth. Both the continental crust (CC) and the mantle source of mid-ocean ridge basalts (MORB) originate from the material characterized by superch...

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