Nd and Sr isotopes from diamondiferous eclogites, Udachnaya Kimberlite Pipe, Yakutia, Siberia: Evidence of differentiation in the early Earth?

New Identity of the Kimberlite Melt: Constraints from Unaltered Diamondiferous Udachnaya – East Pipe Kimberlite, Russia

Nd EVIDENCE FOR EARLY EARTH DIFFERENTIATION

It is widely accepted that the lunar mantle went through a stage of generalized melting, the so-called magma ocean, which gave rise to the radial minera-logical layering of the planet. Similar evidence is totally missing on Earth for which no remnants of a very early crust are known and mostly indirect arguments. Because of the large Earth's radius, the amount of energy liberated by impactors a...

the role of russia in transmission of energy from central asia and caucuses to european union

پس ازفروپاشی شوروی،رشد منابع نفت و گاز، آسیای میانه و قفقاز را در یک بازی ژئوپلتیکی انرژی قرار داده است. با در نظر گرفتن این منابع هیدروکربنی، این منطقه به یک میدانجنگ و رقابت تجاری برای بازی های ژئوپلتیکی قدرت های بزرگ جهانی تبدیل شده است. روسیه منطقه را به عنوان حیات خلوت خود تلقی نموده و علاقمند به حفظ حضورش می باشد تا همانند گذشته گاز طبیعی را به وسیله خط لوله مرکزی دریافت و به عنوان یک واس...

Metasomatized Kyanite-eclogites xenoliths from a southern Indian kimberlite

Kimberlites discovered so far in southern India are restricted to the Eastern Block of the Dharwar Craton and are distributed in three fields: Wajrakarur, Narayanpet, and Raipur. As summarized recently by Paul et al. (2006) and Patel et al. (2006), known kimberlite pipes in the Wajrakarur kimberlite field (WKF), which lies at the western margin of the Cuddapah Basin, occur in three clusters: Wa...

Early to middle Eocene history of the Arctic Ocean from Nd-Sr isotopes in fossil fish debris, Lomonosov Ridge

[1] Strontium and neodymium radiogenic isotope ratios in early to middle Eocene fossil fish debris (ichthyoliths) from Lomonosov Ridge (Integrated Ocean Drilling Program Expedition 302) help constrain water mass compositions in the Eocene Arctic Ocean between !55 and !45 Ma. The inferred paleodepositional setting was a shallow, offshore marine to marginal marine environment with limited connect...