熱流と熱水循環は,オレゴン州中北部,カスケード山脈の熱流と熱水循環です
Science (New York, N.Y.)
|March 17, 1989
まとめ
深いマグマではなく,地下水の流れがオレゴン州の高熱流の原因である可能性が高い.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- 火山学 火山学とは
- 水文学 水文学とは
背景:
- オレゴン州中北部にあるカスケード山脈は,若い火山岩の表面付近の熱流がほぼゼロに達している.
- 以前の研究では,古い岩石における高熱流の源となる深層マグマ熱源が示唆されていた.
研究 の 目的:
- 低地での古い岩石の異常な高熱流の原因を調査するために.
- 熱流の主要な原動力として,マグマ熱源と地下水の循環を区別する.
主な方法:
- アドベクティブ熱流量測定.
- 熱予算分析. 熱予算の分析. 熱予算の分析. 熱予算の分析.
- 火山岩の年代と形成の地質学的評価.
主要な成果:
- 地下水の循環は,若い火山岩 (600万年未満) の地域から熱を効果的に除去します.
- この除去された熱は,より古い岩層で観察された高いアドベクティブと伝導性の熱放出を説明する.
- 古い岩の熱異常は,地域の地下水の流れによって引き起こされる浅い現象である可能性が高い.
結論:
- 地域的な地下水の流れは,観察された高熱流の説明として,地殻の真ん中の深いマグマの源よりより妥当である.
- より深いマグマ熱源は,狭く,変数があり,四季期の弧 (200万年未満) に限られている可能性が高い.
- 熱流モデルを検証するために,さらに深度掘削が推奨されます.
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