Fig. 4From: Characteristics and origin of a new type of polyhalite potassium ore in the Lower Triassic Jialingjiang Formation, Puguang area, northeastern Sichuan Basin, SW ChinaCharacteristics of the two kinds of halite matrix in polished core samples from the Well HC3. a Black halite matrix composed of fragmented crystals; b Red halite matrix composed of cube-shaped crystalsBack to article page