Exsolution|出溶:高溫時均一的一顆礦物,冷卻後能在自己內部分家成兩相

2026-09-09 礦物學/英語 University of North Dakota 查看原文 ↗
WHAT 這是什麼

Exsolution occurs when a mineral solid solution that was homogeneous at higher temperature becomes unstable during cooling and separates into two compositions while remaining solid. Common examples include perthitic feldspar, where plagioclase-rich lamellae separate within K-feldspar, and exsolution textures in pyroxenes.

WHY HERE 為什麼屬於底域的世界

它讓一顆晶體的內部變成冷卻紀錄:現在看見的兩相紋理,可能原本曾經是一個均勻晶格,直到溫度下降才開始「分家」。

BLIND SPOT 補了哪一塊少看的視角

出溶需要特定成分範圍與冷卻條件;礦物內的條紋或片狀構造也可能有其他成因,不能只靠外觀判定。

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Exsolution出溶固溶體Perthite冷卻