一、前言水系沉积物测量已作为一种快速普查找矿方法而获得广泛应用。如今,全国区域化操重新扫面已逐步展开,因此今后水系沉积物测量必将在合适的地区以更快更大的规模展开。然而,至今水系沉积物测量获得的异常,大多限于定性描述,这对分析异常的性质及其远景是必要的,但大规模扫面之后,必然会出现大量的异常区,如何对这些异常进行选优评价,这将是一个急待解决的问题。本文试图以汇水区的 I. INTRODUCTION Hydrological sediment measurements have gained widespread use as a rapid census prospecting method. Nowadays, the re-scanning of the regional regionalization exercises has been gradually carried out. Therefore, sediment measurements of water systems will surely be carried out on a larger and faster scale in suitable areas. However, most of the anomalies observed in sediments of aquatic sediments so far have been limited to qualitative descriptions, which are necessary to analyze the nature and prospect of anomalies. However, after large-scale landscaping, a large number of anomalous zones inevitably occur and how to select these anomalies Excellent evaluation, it will be an urgent problem to be solved. This article attempts to catchment area