海底への海洋ガブロスの貢献は,磁気異常を広げる海底への貢献です
まとめ
海洋ガブロは海洋磁気異常に大きく貢献しています. この研究は,海洋地殻の第3層におけるガブロの特性,変形,およびマグマの進化の関係を解明しています.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- 海洋地質学 海洋地質学
- ペトロロジー・ペトロロジーとは
背景:
- 海洋ガブロは,海洋地殻の層3の重要な構成要素である.
- 彼らの変数磁気特性により,磁気異常への貢献は論争の的になっている.
- 以前の研究では,詳細な分析のための連続したセクションが欠けていました.
研究 の 目的:
- 海洋ガブロスの磁気特性と地質学的特性との関係を調査する.
- ガブロ磁化における変異とマグマの進化の役割を明らかにする.
- 海洋磁気異常に対する海洋ガブロスの貢献を決定する.
主な方法:
- 海洋掘削プログラム (ODP) の118.8段の連続した500.7メートルの海洋ガッブロの分析.
- メタモルフィズムとマグマの進化を含む地質学的特徴の詳細な検討.
- 地質学的データとの磁気特性の測定と相関.
主要な成果:
- 磁化,変異の程度,海洋ガブロスのマグマ的進化の間の明確な相関を確立した.
- 磁気特性の変動が特定の地質学的プロセスと関連していることを実証した.
- 磁気異常シグネチャーに対するガブロイク岩の有意な影響を定量化した.
結論:
- 海洋ガブロは,海洋磁気異常の主な原因となっている.
- メタモルフィズムとマグマの進化は,海洋地殻の磁気シグネチャーに大きな影響を与えます.
- ガブロ・ペトロロジーの理解は,海底の拡散記録の解釈に不可欠です.
関連する概念動画
01:30Magnetism
9.9K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
9.9K
01:27Magnetic Fields
7.9K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
A magnetic field is defined by the force that a charged particle experiences...
7.9K
01:19Magnetic Field Lines
6.5K
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
Magnetic field lines follow several hard-and-fast rules:
6.5K
01:26Divergence and Curl of Magnetic Field
4.2K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
4.2K
01:28Magnetostatic Boundary Conditions
1.8K
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...
1.8K
01:31Magnetic Susceptibility and Permeability
2.8K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
2.8K