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1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Mantle transition zone？

Definition 9.11 University Earth and Space Sciences — Year 1 · 第 9 章 — The Layered Earth

The mantle transition zone is the part of the mantle between the seismic discontinuities near $410\,\mathrm{km}$ and $660\,\mathrm{km}$ depth, in which olivine of the upper mantle is replaced by its denser polymorphs, wadsleyite and then ringwoodite. Above it is the upper mantle; below it the lower mantle, down to the core–mantle boundary.

The minerals of a peridotite mantle with depth, as volume fractions (schematic: the boundaries are drawn sharp, and the fractions are round values within the ranges quoted in the text). The composition does not change; the minerals do, at about 410, 520 and 660\, km. — The minerals of a peridotite mantle with depth, as volume fractions (schematic: the boundaries are drawn sharp, and the fractions are round values within the ranges quoted in the text). The composition does not change; the minerals do, at about 410, 520 and $660\,\mathrm{km}$ .

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