Sediments in the nearshore of Northwest Alaska enrich chlorite, and have variable kaolinite and high SiO2 contents, indicating a large fraction of sediments from the Northwest Alaskan coasts and riven; .

• 来自阿拉斯加西北部河流和海岸带的物质富含绿泥石，高岭石含量变化大，SiO_2含量高，多富Zr，对阿拉斯加西北部近海沉积物影响明显；