Multi-Source remotely sensed data applied to gold and nonferrous metals exploration in Xinjiang region
Guo Huadong,Lin Shudao,Gui Chengyu,Lin Qizhong
Zhang Shengkai,Zhu Chongguang,Li Naihuang
Institute of Remote sensing Application , Academia Sinica
Beijing, China
Abstract
An experiment of remote sensing for mineral exploration has been carried out in Northern Xinjiang Region in the use of Landsat TM MSS, SPOT HRV, NOAA AVHRR, National Land Resource Survey Satellite data, airborne synthetic aperture radar and colored infrared data. Considering the disparity of landscape and geological conditions of mineralization in each subarea of the study region, relevant study techniques and their combinations were chosen and various methods were developed for recognizing and identifying the mineralization. On the basis of field reconnaissance, geochemical prospecting,- electrical sounding, and detrical extraction and geological engineering test were applied to gold anomalous areas which were selected as emphasized study targets, which established a relatively complete system of remote sensing for mineral exploration, i.e. spaceborne remotely sensed data for reconnaissance over large area- airborne data for locating position-geochemical and geophysical data for identifying the quality geological engineering test for determining the quantity. More than 10 gold, tin and copper deposit targets and prospective targets have been discovered and determined. Some amounts of scientific prospective reserve of gold mines have been evaluated from one of the gold targets.
Introduction
Xinjiang Region is located in the central part of Eurasia, most of it are arid, sparse vegetation cover, well rock exposure and a low degree geological work being done. Therefore, remote sensing technology has prominent advantage to working in this area. In the last three years, remote sensing for mineral exploration in the Northern Xinjiang have been undertaking. The chief aim is to exploite gold and nonferrous metal resources,'
The study area of this program covers more than 100,000 square kilometers including Altaimountain and Junggar depression. Its tectonic position lies within Altai and Junggar folding zone with Paleozoic meta-volcanic and meta-sedimentary rocks and well-developed basic-acidic intrusions. It is obvious that over such a large area everything is disparity: different landscape, complicated structures which control mineralization, various mineralized rorks and metalogenetic conditions, which lead many different ore deposits existing in the study area. In order.
To find out the mineral deposits, the key step is to work out the most efficient and effective techniques for mineral exploration using remote sensing.
Recently a great number of number of romote sensing geologists are seeking the techniques and methodology of remote sensing for mineral exploration. In consideration of factors mentioned above and aims of the program which is to explore as much gold and nonferrous metals resources as possible, the principle of program is determined to use multi-source remotely sensed data as major techniques and supported by geochemical and geophysical work. It is necessary for the program's aim to develop relevant techniques and methods and their combinations according to characteristics of targets.
