Bulk analysis from IODP Core 339-U1389A-25X@en

Grain-size statistical parameters were calculated using Gradistat software (Blott and Pye, 2001) and based on the geometric graphical method (Folk and Ward, 1957). The same samples were then treated to remove the biogenic carbonate and siliceous components, and re-analysed with the laser micro-granulometer, with a view to determining the sortable silt component.采用Gradistat软件（Blott与Pye，2001）、基于福克-沃德几何图解法（Folk and Ward, 1957）计算得到粒度统计参数。随后对同一样品进行处理以去除生物成因碳酸盐及硅质组分，再通过激光微粒度分析仪开展重新分析，以期确定其中的可分选粉砂组分。