low quartz

low quartz

[′lō ′kwȯrtz]
(mineralogy)
Quartz that has been formed below 573°C; the tetrahedral crystal structure is less symmetrically arranged than a quartz formed at a higher temperature.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
During the incipient stage (Figure 4(a)), boiling upflow plumes at >300[degrees]C with silica solubility > 10 mmol [kg.sup.-1] ascend above the margins of the intrusion into overlying cold groundwater with low quartz solubility.
Eagle Ford Shale is mainly clay-rich limestone with low quartz content making less brittle than typical shale reservoirs (Barnett), yet with high fracturing capability.
In order to find indicators of the critical temperature for the hydrothermal deposition of low quartz in the andesite of Las Vigas, chlorite and illite were analyzed by microprobe, and the resulting values were fitted into the temperature curves of Cathelineau et al.