Experimental estimation of the rate of gravitation fractionating of xenocrysts in kimberlite magma at high P-T parameters |
| |
Authors: | A. I. Chepurov E. I. Zhimulev V. M. Sonin A. A. Chepurov A. A. Tomilenko N. P. Pokhilenko |
| |
Affiliation: | (1) Igneous Petrology Laboratory, Department of Geology, Banaras Hindu University, Varanasi, 221005, India |
| |
Abstract: | This report considers experimental studies of the gravitation fractionating of xenocrysts (diamond, garnet, and olivine) in kimberlite magma at 4.0 GPa and 1400°C. The values obtained (0.6–0.7 m/h for 0.3-mm diamond crystals, 0.36 m/h for garnet grains, and 0.6–0.29 m/h for olivine grains) point to a high rate of xenocryst sinking in the ultralow-viscous kimberlite magma (as high as 1 m/h and more, depending on the densities and grain sizes of minerals). A high rate of xenocryst sinking in kimberlite magma results in the impossibility of preservation of heterogeneity in these melts for a sufficiently long time. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|