Factors Controlling Magnetism of Reddish Brown Soil Profiles from Calcarenites in Southern Spain: Dust Input or In-situ Pedogenesis?

Frontiers in Digital Humanities

¹  Jiang, Zhaoxia¹  Torrent, José²  Zhang, Chunxia³  Liu, Qingsong⁵  Barró⁶  Duan, Zongqi⁶  n, Vidal⁷  Hu, Pengxiang⁸ 

[1] Departamento de AgronomíKey Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China;Laboratory for Marine Geology, Qingdao National Oceanography Laboratory for Science and Technology, Qingdao, China;Research School of Earth Sciences, Australian National University, Canberra, Australia;State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China;a, Universidad de Córdoba, Córdoba, Spain

关键词: Spanish soil;    Sahara dust;    pedogenesis;    magnetism;    Ferrimagnet;   

DOI  :  10.3389/feart.2016.00051

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

Under aerobic conditions, the A and B horizons of soils are magnetically enhanced due to neoformation of ferrimagnets through pedogenesis. This study systematically investigated soils developed on calcarenites of Neogene age in southern Spain to determine the dominant factors controlling the soil magnetism. Geochemical and clay mineral analyses indicate that aeolian dust significantly contribute to the A and B horizon material of the Spanish soil. Nevertheless, the magnetic enhancement of soils can be simply attributed to the pedogenically produced ferrimagnets in-situ. Therefore, the magnetism of Spanish soils is still linked to paleoclimatic variations regardless of the complexities of aeolian inputs from the Northwestern Africa.

【 授权许可】

CC BY