Science. 1984 Nov 30;226(4678):1071-4. doi: 10.1126/science.226.4678.1071.
Densities of molten silicates at high pressures (up to approximately 230 kilobars) have been measured for the first time with shock-wave techniques. For a model basaltic composition (36 mole percent anorthite and 64 mole percent diopside), a bulk modulus K(s), of approximately 230 kilobars and a pressure derivative (dK(s)/dP) of approximately 4 were derived. Some implications of these results are as follows: (i) basic to ultrabasic melts become denser than olivine-and pyroxene-rich host mantle at pressures of 60 to 100 kilobars; (ii) there is a maximum depth from which basaltic melt can rise within terrestrial planetary interiors; (iii) the slopes of silicate solidi [(dT(m)/dP), where T(m) is the temperature] may become less steep at high pressures; and (iv) enriched mantle reservoirs may have developed by downward segregation of melt early in Earth history.
首次采用冲击波技术测量了高压下（高达约 230 千巴）熔融硅酸盐的密度。对于一种玄武岩模型成分（36 摩尔%钙长石和 64 摩尔%透辉石），得出了约 230 千巴的体积模量 K(s)和约 4 的压力导数 (dK(s)/dP)。这些结果的一些影响如下：(i) 在 60 至 100 千巴的压力下，基性至超基性熔体比富含橄榄石和辉石的地幔主体更密集；(ii) 有一个玄武质熔体可以在地球行星内部上升的最大深度；(iii) 在高压下，硅酸盐固相线的斜率 [(dT(m)/dP)，其中 T(m) 是温度] 可能变得不那么陡峭；(iv) 在地球历史早期，通过熔体的向下分异可能形成了富含有机物的储层。
