mineral sequence

mineral sequence

[′min·rəl ′sē·kwəns]
(mineralogy)
References in periodicals archive ?
However, this mineral sequence was probably affected by contact metamorphism which could explain analcime formation accompanied by decreasing Si activity and increasing temperature (not reflected in Figure 8) In the Si[O.
The required amounts of silica, alumina and alkali and alkaline- earth cations necessary for zeolite formation probably resulted from volcanic glass and primary igneous fenocrystal dissolution, although the plagioclase alteration reaction in the rock matrix, releasing Ca, could also have been responsible for this According to the defined mineral sequence, it can be deduced that a change in fluid composition occurred as temperature dropped Zeolite formation in the region studied here began with the highest Si activity in fluid and low Si/Al ratio Na zeolites and ended with the lowest Si activity in fluid and high Si/Al ratio Ca zeolites.