関連する実験動画
Updated: Jul 11, 2026

08:14
Atom Probe Tomography Analysis of Exsolved Mineral Phases
Published on: October 25, 2019
エクロギット,ピロキセンの地熱,層状マントルのコンベクションによる
まとめ
エクロジット・キセノライトの温度から,地球のマントルには層層のコンベクションがあることが示唆される. この地熱は,石層板の下にあるコンベクティブ境界層を示し,全マントルのコンベクションモデルとは異なる.
科学分野:
- 地質化学 地質化学
- 地質物理学 地質物理学とは地質物理学です.
- ペトロロジー・ペトロロジーとは
背景:
- エクロジット・キセノライトは,地球のマントルの状態についての洞察を提供します.
- サブコンチネンタル地熱は,石化板の動態を理解する上で極めて重要です.
研究 の 目的:
- ロバート・ビクター・キンバーライトパイプからのエクロジット・キセノリトの均衡温度を決定する.
- サブコンチネンタル地熱とそのマントルのコンベクションへの影響を解釈する.
主な方法:
- エクロジット・キセノライトの鉱物組成の分析.
- クセノリトの均衡温度に基づく地熱モデリング.
主要な成果:
- エクロジット・キセノリスの81%は1000~1250°Cの間のバランスを保った.
- これらの気温は,ガーネット・ペリドータイト・キセノリトから派生した屈折した亜大陸地熱の下肢と一致しています.
- 地熱の屈折グラデーションは,二重の熱境界層を示唆しています.
結論:
- 曲げられた地熱は,おそらく,石層板の下にあるコンベクティブ境界層を表している.
- データは,マントル全体のコンベクションではなく,層状のマントルコンベクションのモデルをサポートしています.
- 古代のマントルのプロセスに関する証拠をアーケアのエコロギットが提供しています.
関連する概念動画
Isothermal Processes
A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...
Heat Flow and Specific Heat
Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is the kilocalorie...
Magnetostatic Boundary Conditions
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
Conduction, Convection and Radiation: Problem Solving
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
Thermal Sigmatropic Reactions: Overview
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred to as...
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred to as...
Temperature and Thermal Equilibrium
Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...

