桂北平乐地区锰矿的遥感胁迫植被指示指数异常的提取

Vegetation indicator index anomaly extraction of manganese mineralization under remote sensing stress in Pingle area of North Guangxi

表生沉积型锰矿在桂北分布较为广泛,该类型的锰矿主要是由滨海—浅海相锰结核组成的沉积岩经抬升后,经氧化风化淋滤后沉积在一定坡度坡向的空间位置,由于其沉积的不均一性,造成地表植物的生长胁迫环境不一致,形成了植物的波谱异常。因此可以借助于遥感技术识别矿区植物植被指数的差异,进而确定沉积锰矿的赋存空间位置。以桂北研究区的遥感Landsat8 Oil数据、高分一号GF-1 pms数据、高程DEM数据为基础,进行深入的综合分析与信息挖掘,建立多种植被指数并提取其异常分布,从中确定出胁迫植物锰矿异常区。结果表明,植被指数异常区与其成矿点的空间位置符合程度较高。

It is found that the superficial sedimentary manganese deposits are widely distributed in northern Guangxi.In the paleo-sedimentary environment,this type of manganese mineralization is mainly caused by the uplift of sedimentary rocks composed of coastal-shallow marine manganese nodules,and then are accumulated on the slope of a certain slope after oxidation and weathering.Due to the inhomogeneity of the sedimentary rocks,the geochemical growth stress environment of the surface plants is inconsistent,and the anomaly of the plant land mass spectrum is formed.Therefore,it is possible to identify the plant index anomaly by means of remote sensing technology,and the location of the sedimentary type Mn deposit is determined.Based on the remote sensing Landsat8 Oil data,high grade No.1 star GF-1 pms data and elevation DEM data,this paper makes a thorough comprehensive analysis and information treatment,sets up various vegetation indexes and extracts the anomaly distribution,and determines the anomaly area of the plant manganese mineralization.The result shows that the spatial location of the vegetation index anomaly is consistent with that of the Mn metallogenic site.