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鐘乳石和石筍中氣——液包體的發現及其成因

  • 摘要: 再次對桂林等地鐘乳石(Stalactite)和石筍(Stalagmite)進行了研究,首次發現其中有豐富的氣-液包體。礦物爆裂溫度為215~335℃,個別可達435℃。部分樣品均化溫度為110~187℃。對礦物熱爆裂過程進行了錄音,並進行了顯微攝影。成分分析證實,包體的氣相為CO2或含大量CO2。這些包體是在外生作用下化學成因的產物,屬異常成因,不能用于包體礦物學中的一般測試和找礦工作。提出了區分異常成因和正常成因包體的必要性和區分標志。計算了方解石等碳酸鹽在熱聲分析中可能產生的嚴重干擾。提出這種干擾起源于這類包體和非由解理產生。鑒于這些結果,包體礦物學的某些基礎理論或技術應作適當修改與補充。

     

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