超高速に広がる東太平洋の上昇に沿った熱水噴出にマグマ活動の影響
まとめ
熱水噴出は東太平洋上昇沿いに豊富に存在し,頻繁なマグマ活動を示しています. この超高速に広がる山脊は,他の部分と比較して2倍の羽根の覆いを示しています.
科学分野:
- 地質学 地質学 地質学
- 海洋学 海洋学とは
- 地質化学 地質化学
背景:
- 水熱活動は,海中のシステムにおける重要なプロセスである.
- イースト・パシフィック・ライズのような超高速に広がる山脊は,独特の地質的特徴を示しています.
- 羽根の分布と組成を理解することは,マグマティックと熱水過程の洞察を提供します.
研究 の 目的:
- イースト・パシフィック・ライズに沿った熱水噴霧の分布を調査する.
- 羽根の特徴と,その背後にある地質学的特徴の関係を調査する.
- 水熱循環に対するマグマの影響の頻度を評価する.
主な方法:
- イースト・パシフィック・ライズ沿いの水熱活動に関する調査を実施.
- 脊頂沿いの熱水噴出雲の範囲をマッピングする.
- 羽根の化学組成を分析し,揮発性および非揮発性種に焦点を当てました.
主要な成果:
- 熱水噴霧は,調査された山脊の頂上 (13°50'18°40'S) の約60%をカバーしています.
- 羽毛の豊富さは,比較可能なゆっくり広がる山脊のセクションよりもかなり高い (ほぼ2倍).
- プラームは,軸性マグマ室を持つ膨張された軸性横断断面で最も一般的でした.
- 羽根に含まれる揮発性生物と非揮発性生物の比率が高いことは,最近のマグマの乱れを示している.
結論:
- イースト・パシフィック・ライズでは,非常に高い熱水噴出量がある.
- 軸性マグマ室の存在は,羽根の豊富さの増加と相関しています.
- 頻繁に発生するマグマ活動が,この超高速に広がる山脊の熱水循環に大きく影響を与えます.
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...
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...
Rapidly Varying Flow
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
General External Flow Characteristics
The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
Effect of Sea Water on Concrete
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks, which undergo...
Concrete in areas between tide marks, which undergo...
Magnetic Flux
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...


