MỘT SỐ ĐẶC ĐIỂM KHOÁNG SÉT Ở ĐẤT ĐỎ PHÁT TRIỂN TRÊN ĐÁ VÔI MIỀN BẮC VIỆT NAM

Hồ Quang Đức, Trương Xuân Cường, Ng.T. Hương Giang, Nguyễn Văn Đạo (trang 6-9)

Từ khoá:  đặc điểm, khoáng sét, đất đỏ, đá vôi, Bắc Việt Nam

Summary

Clay mineral composition of soils derived from limestone in the North of Vietnam

6 typical soil profiles derived from limestone were collected. Caly mineral was analyzed by X-ray diffraction method; soil samples were taken from each horizon of profiles and air-dried; specimens of soils had treated by Mg-saturated, K-saturated, Mg-saturated after solvation with glycerin and K-saturated specimen was after heating at 330oC and 600oC. Results showed that kaolinite was a predominant mineral in the soils derived from limestone, occupied more than 80% in the clay fraction.