On the whole, a faster sweep will find much larger, further gold targets, but will are inclined to overlook little shallow gold. A slower sweep will tend to lose sensitivity to the deepest targets, but will see tiny shallow gold easier. In combination with the different levels of ground mineralization, https://www.natthadon-sanengineering.com/forum/topic/65893/how-to-detect-rare-metals-in-your-area