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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 Triple junction; stable triple junction？

又称： triple junction · stable triple junction

Definition 12.10 University Earth and Space Sciences — Year 1 · 第 12 章 — Plate Kinematics on a Sphere

A triple junction is a point where three plates meet, and with them three plate boundaries, each a ridge (R), a trench (T) or a transform fault (F). A triple junction is stable if, as the plates move, it keeps the same geometry: the same three kinds of boundary meeting at the same angles.

A junction J of three ridges between plates A, B and C. (a) Map: each ridge (double line) spreads perpendicular to its axis (arrows). (b) Velocity space: each plate is a point; the side ab is the velocity of B relative to A, perpendicular to the ridge between them. The velocities of the junction that leave a symmetric ridge unchanged form the perpendicular bisector of the corresponding side (dashed); the three bisectors always meet, at j, the velocity of the junction. — A junction J of three ridges between plates A, B and C. (a) Map: each ridge (double line) spreads perpendicular to its axis (arrows). (b) Velocity space: each plate is a point; the side $ab$ is the velocity of B relative to A, perpendicular to the ridge between them. The velocities of the junction that leave a symmetric ridge unchanged form the perpendicular bisector of the corresponding side (dashed); the three bisectors always meet, at $j$ , the velocity of the junction.

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