Về bản chất của hiện tượng “phun bùn” ở Ninh Thuận

Abstract

The nature of the phenomenon of "mud eruption" in Ninh Thuan Detailed studies in mineral and chemical compositions of the muds at the mud mounds in the area of Loi Hai and Nhi Ha communes (Ninh Thuan province) indicated that muds are characterized by high clay contents (40-50%), which consists mainly montmorilonite (up to 36%). Exchangeable sodium percentage (ESP) of muds ranged from 15.61 to 68.73% and belong to group of high sodicity. High concentration of montmorilonite makes mud in the mud mound able to swell significantly, on the other hand the high sodicity leads to strong dispersal ability of the clay components, so they swelled easily when saturated with water inducing pressure pushing bulging, even making mud “spilled” onto the surface.