Mineral Weathering and Element Migration in Granite Weathering Pits (Gnammas): A Case Study in Eastern China

This paper investigates weathering pits at three granite sites located on mountain tops, in a former river bed, and the coastline of an island, respectively, from north to south eastern China aims characterize pit formation above settings terms mineral elemental transport. In these settings, main elements, groups debris fragments rock surface directly adjacent were analyzed. The chemical index alteration (CIA), quartz/feldspar (Q/F) ratio Na/K (Na2O/K2O) applied identify origin assess difference processes different settings; mass transfer coefficient was used measure characteristics element migration during sites. result CIA, Q/F, analysis shows that suffered higher intensity than nearby surfaces, indicating study originated weathering. However, differences CIA values areas are only durations cannot be climate types areas. calculation indicates Na K continuously leached process regardless whether valleys, mountains or coast. Other elements may not external source for resulting natural tendencies pits. Seawater can also factor contributing patterns coastal inland addition, environment valleys is more conducive tops.