一个关于金伯利特升和喷发的综合模型
Lionel Wilson1, James W Head Iii
1Environmental Science Department, Lancaster University, Lancaster LA1 4YQ, UK.
Nature
|May 4, 2007
概括
一个新的模型解释了金伯利特喷发如何形成含有钻石的藻. 该过程涉及快速的堤上升,二氧化碳气体释放和流化,大约在一个小时内完成.
科学领域:
- 地质地质地质地质地质地
- 火山学 火山学是一门学科.
- 矿物学是什么?矿物学是什么?
背景情况:
- 迪亚特里姆 (Diatremes) 是胡卜状的地质构造,代表深层岩金岩入侵的上部部分.
- 这些特征作为钻石的主要陆地来源具有重要意义.
- 现有的模型很难解释金伯利特和藻的复杂,有时是矛盾的特征.
研究的目的:
- 介绍金伯莱特升和喷发的新型模型.
- 为了阐明推动金伯利特和二氧化形成的不稳定过程.
- 解决金伯利特和藻的特征中明显的矛盾.
主要方法:
- 该研究提出了一个基于流体动力学和地质过程的新概念模型.
- 它分析了堤启动,传播和表面相互作用的阶段.
- 该模型结合了深层地幔CO2丰富的流体和岩泡的作用.
主要成果:
- 金伯利特堤的启动涉及从一个深厚的,富含二氧化碳的地幔源迅速上升.
- 表面破裂引发了压缩波,导致堤防墙的爆破和岩碎片.
- 一个流化波和快速的岩冷却在一个小时内迅速形成了二流体结构.
结论:
- 拟议的模型解释了金伯利特喷发的快速,不稳定的性质.
- 它通过一个动态的过程解决了金伯利特和二特质的矛盾.
- 该模型强调了二氧化碳溶解和流化在二氧化物形成中的关键作用.
相关概念视频
MAPK Signaling Cascades
7.3K
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
7.3K
Isothermal Processes
3.8K
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...
3.8K
Impact: Problem Solving
619
In an experiment conducted during a Mars mission, a rover propels a projectile with an initial velocity, and the projectile rebounds after colliding with the Martian surface. To ascertain the maximum height attained by the projectile after this collision, the known restitution coefficient and acceleration due to gravity are employed.
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
619
The Kinetic Model of Gases
160
The kinetic model of gases explains the properties of a perfect gas using three main assumptions: molecules move in ceaseless random motion, their size is negligible compared to the distances between them, and they do not interact except during perfectly elastic collisions. The total energy of a gas is the sum of the kinetic energies of all its constituent molecules. The pressure exerted by the gas arises from the continual bombardment of the container walls by billions of colliding molecules.
160
Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model
938
Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
938
Multicompartment Models: Overview
715
Multicompartment models are mathematical constructs that depict how drugs are distributed and eliminated within the body. They segment the body into several compartments, symbolizing various physiological or anatomical areas connected through drug transfer processes such as absorption, metabolism, distribution, and elimination.
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
715


