Position and water depth revises for the station of dredge and video equipment
Hong Zhang · 2008
In this article the necessity of standardized treatment to the Co-rich crusts' survey data was briefly introduced and the method of the position and water depth revises of the dredge and video stations was introduced,too.Finally,its using effects were evaluated.The Co-rich crusts(hereafter for crust)are a kind of hydrogenesis sedimental ore deposits.In the beginning,the investigators often used a quadrate iron dredge to sample the crust.The dredge hasn't the function of hydrolocation,so the position of the dredge on the sea bottom is replaced by the position of the ship,this made it obvious error in the position location.As the same,deep sea video is also used often,but there is deviation of the logging position and water depth in comparison with the real value,too.So the primal survey data need to be revised,otherwise there will be obvious deviation when these data are used directly in the mountain crust resource evaluation and drawing the line of this kind of deposit.In the need of the standardized treatment to the crusts' survey data,the formula of the position revise was deduced and the confirmation of the key parameter wire cable angular was discussed in this article.Then the angular θ was estimated and the reliability of the position and water depth revise was examined by the MX sea mountain which has the precise data of the shallow drill.This revise method was well used in the MM3 mountain and proved that it is necessary to revise the old survey data.