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地球学报  2004 

实验研究岩石圈深部流体及相关科学问题

Keywords: NaCl-H2O溶液,岩石圈深部流体,临界态,电导率,高导层

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Abstract:

实验研究地球岩石圈深部流体和对地球深部流体的观测发现,水溶液在跨越临界态时有许多特殊性质。使用水热金刚石压钻在200~800MPa,300~700℃条件下,可观测到:NaCl-H2O溶液两相不混溶相区的结构和近临界态现象。测量高温高压下NaCl溶液的电导率,在近临界和跨越临界态时发现最大电导率值。在对大洋中脊热水观测中可发现大多数喷口是在2200m深。喷口正在近临界态条件下喷出含矿流体。这些临界态研究对于重新分析岩石圈的地球物理测量结果和对认识大陆岩石圈内流体性质有很大意义。

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