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1 Markets I: The Ecosystem and Exchange-Traded Marketsবাজার অনলাইন 2 Markets II: Rates, FX and Creditবাজার অনলাইন 3 Markets III: Commodities, Energy and Cryptoবাজার অনলাইন 4 Quantitative Methodsপদ্ধতি অনলাইন 5 Derivatives and Volatilityডেরিভেটিভস অনলাইন 6 Rates, Credit, XVA and Riskসুদহার, ঋণ ও ঝুঁকি অনলাইন 7 Research Craft: Predictors, Backtests, Measurement, Portfoliosগবেষণা অনলাইন 8 Strategies I: Equities and Futuresকৌশল অনলাইন 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desksকৌশল অনলাইন 10 Microstructure and Executionএক্সিকিউশন অনলাইন 11 Market Making and High-Frequency Tradingমার্কেট মেকিং অনলাইন 12 Machine Learning for Marketsমেশিন লার্নিং অনলাইন 13 Low-Latency Softwareপ্রযুক্তি অনলাইন 14 Networks, Hardware and Trading Infrastructureপ্রযুক্তি অনলাইন 15 Research, Data and Risk Platformsপ্রযুক্তি অনলাইন 16 The Desk and the Firmপ্রতিষ্ঠান অনলাইন 17 The Industry: Firms, Roles and Careersক্যারিয়ার অনলাইন 18 Interviews I: Maths, Probability and Speedক্যারিয়ার অনলাইন 19 Interviews II: Markets, Trading Games and the Final Roundক্যারিয়ার অনলাইন 20 Interviews III: Codeক্যারিয়ার অনলাইন
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Earth and Space Sciences · পরিভাষা

Bulk silicate Earth, primitive mantle কী?

অন্য নাম: bulk silicate Earth · primitive mantle

Definition 3.4 University Earth and Space Sciences — Year 2 · অধ্যায় 3 — Elements in the Earth

The bulk silicate Earth is the Earth without its core: mantle, crust, ocean and atmosphere taken together, as they would be if mixed. The same composition is called the primitive mantle: the mantle as it was after the core formed and before any crust was extracted from it.

A nodule of mantle peridotite (lherzolite) in a basalt lava from Kilbourne Hole, New Mexico, 7.4\, cm across at its widest: yellow-green olivine with dark pyroxene. The lava tore it from the upper mantle and carried it to the surface. James St. John, CC BY 2.0.
A nodule of mantle peridotite (lherzolite) in a basalt lava from Kilbourne Hole, New Mexico, 7.4 cm7.4\,\mathrm{cm} across at its widest: yellow-green olivine with dark pyroxene. The lava tore it from the upper mantle and carried it to the surface. James St. John, CC BY 2.0.
The silicate Earth compared with CI chondrites: for each element X, the ratio X/ Mg in the bulk silicate Earth divided by the same ratio in CI chondrites, against the 50 per cent condensation temperature (hot on the left). Refractory lithophile elements are chondritic relative to one another; volatile ones are depleted with falling condensation temperature; siderophile and chalcophile elements are depleted far more. Data: McDonough and Sun (1995); Lodders (2003).
The silicate Earth compared with CI chondrites: for each element XX, the ratio X/MgX/\mathrm{Mg} in the bulk silicate Earth divided by the same ratio in CI chondrites, against the 50 per cent condensation temperature (hot on the left). Refractory lithophile elements are chondritic relative to one another; volatile ones are depleted with falling condensation temperature; siderophile and chalcophile elements are depleted far more. Data: McDonough and Sun (1995); Lodders (2003).
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