基于ASTER热红外数据的堆积型铝土矿含量反演  

Accumulated bauxite content inversion based on ASTER thermal intrared data

作　　者：成功[1] 曾令瑶[1] 杨震[1,2] 

机构地区：[1]中南大学地球科学与信息物理学院,有色金属成矿预测教育部重点实验室,湖南长沙410083 [2]长沙有色冶金设计研究院,湖南长沙410011

出　　处：《轻金属》2014年第2期5-9,共5页Light Metals

摘　　要：平果岩溶堆积型铝土矿是我国华南地区特有的堆积型铝土矿的代表,对平果堆积型铝土矿的研究已经很多,但是几乎都没有涉及到原矿与矿化信息之间的联系。作者利用ASTER数据的热红外波段,通过定量遥感方法估计了研究区堆积型铝土矿中各氧化物的含量。结合实际测量数据,利用回归分析与函数模拟,确定了原矿、净矿与反演结果中各氧化物含量之间的数值关系,进而提取出原矿中SiO2、Al2O3及铝硅比信息。由于凝灰岩与粘土岩的干扰,单独对SiO2或Al2O3矿化信息提取的结果不如铝硅比信息提取结果理想,提取的铝硅比信息能清晰地反映铝土矿的分布区域、分布形态和含量的高低。这为桂西地区的堆积型铝土矿的遥感找矿提供了一种新的有效方法。Pingguo accumulated bauxite is the typical one of the accumulated bauxites in South China region. There are already have many researches focus on accumulated bauxite in Pingguo, but most of them have not touched the relationship between the original minerals and mineralization information. So the author utilize thermal infrared bands of ASTER data to quantitatively inverse the content of oxide in the accumulated bauxite. The numerical relations among the original minerals, pure minerals and the results of quantitative inversion are defined by means of regression analysis and simulation functions with actual measured data and the information of SiO2, A1203 and A/S are extracted. Because of the interference of tuff and clay stone, the extraction re- suits of SiO2or A1203 is not as good as the extraction results of A/S information. The extraction results of A/S information can clearly reflect the distribution area, shape and content of bauxite. This paper provides a effective way to remote sense exploration of accumulated bauxite in the western region of Guangxi.

关 键 词：堆积型铝土矿 定量遥感 回归分析 ASTER数据 遥感信息提取 

分 类 号：P627[天文地球—地质矿产勘探] P618.45[天文地球—地质学]