贵州省安顺市耕地表层土壤养分元素分布特征

望谟县坝达金矿位于黔西南地区，大地构造位置为扬子板块西南缘。本文通过对望谟县坝达金矿矿床地质特征、1∶10 000土壤地球化学特征进行综合分析和研究，旨在对望谟县坝达金矿进行找矿远景分析。通过矿床地质特征研究表明，Ⅰ、Ⅱ、Ⅲ矿体均呈脉状，赋矿岩石为领好组一段的含碳酸盐碎屑岩类；矿体产出受两条走向北西的断层破碎带控制；产出于两断裂之间的次级断层内金以自然金、半裸露金和碳酸盐、黄铁矿等包裹金形式存在。1∶10 000土壤地球化学圈定了Ⅰ-Au-As，Ⅱ-Au-As，Ⅲ-As-Sb-Hg，Ⅳ-Au-Hg四个综合异常区，并发现Au和As相关性最强，且在Ⅰ-Au-As异常查证中发现了金矿化。因此，综合研究认为该矿区存在深部隐伏矿体的可能。

Distribution Characteristics of Nutrient Elements in Surface Soil of Cultivated Land in Anshun City, Guizhou Province

In this paper, based on the test data of surface soil samples in Anshun city, it makes a brief analysis from four aspects of organic matter, alkali hydrolyzed nitrogen, available phosphorus and available potassium. The results show that more than 90% of the cultivated land in Anshun city has the content of organic matter, alkali hydrolyzed nitrogen and available potassium above the middle level, and more than 90% of the cultivated land has the content of available phosphorus below the middle level. With the results of this study, it can provide better guidance for agricultural fertilization in Anshun city, so as to regulate the content of soil nutrient elements through human means, provide better growth environment for crops, and better serve rural areas, agriculture and farmers.