Abstract
Three stratigraphic units ranging from the lower Cretaceous to the Miocene were studied in order to investigate the presence of analcime in diagenetic assemblages of different ages. The units were deposited in forearc, foreland/back-arc, and intra-arc basinal settings. Characteristics of other sedimentary analcime occurrences were examined in order to define conditions favourable for analcime precipitation. Analcime precipitation in Andean alluvium resulted from the evolution of saline, alkaline brines under an arid, evaporative climate in closed hydrographic basins with circulating groundwater systems. -from Authors
| Original language | English |
|---|---|
| Pages (from-to) | 189-202 |
| Number of pages | 13 |
| Journal | Geological Journal |
| Volume | 26 |
| Issue number | 3 |
| Publication status | Published - 1991 |