Remote sensing technology takes the important role in the geological features identification of structure, strata, alterations and plutons. This paper uses satellite high spatial resolution remote sensing image and information identification technology to analyze tectonic geological features in Yinchuan basin, and better results are achieved. Based on image enhancement and geological interpretation, the structural characteristics including Helan mount large fold belt, Weining-beishan sawtooth structure and en echelon faults of Yinchuan area are analyzed and combined with seismic information, the causes of Yinchuan graben and its surrounding structures are discussed. Results shows all those structural characteristics and phenomena are caused by Yanshan movement and Himalayan movement, and Yinchuan graben is formed in the pulling tension environment caused by Himalayan movement on the basis of Helan-Hengshanbu fault belt which created by Yanshan movement. The tectonic evolution period times are determinated by this results and it is important for oil and gas exploration. Remote sensing information identification technology provides the new perspective and approach for geological research.
The modern Earth Observation System (EOS) technology takes important role in the uranium geological exploration, and
high resolution remote sensing as one of key parts of EOS is vital to characterize spectral and spatial information of
uranium mineralization factors. Utilizing satellite high spatial resolution and hyperspectral remote sensing data
(QuickBird, Radarsat2, ASTER), field spectral measurement (ASD data) and geological survey, this paper established
the spectral identification characteristics of uranium mineralization factors including six different types of alaskite, lower
and upper marble of Rössing formation, dolerite, alkali metasomatism, hematization and chloritization in the central zone
of Damara Orogen, Namibia. Moreover, adopted the texture information identification technology, the geographical
distribution zones of ore-controlling faults and boundaries between the different strata were delineated. Based on above
approaches, the remote sensing geological anomaly information and image interpretation signs of uranium mineralization
factors were extracted, the metallogenic conditions were evaluated, and the prospective areas have been predicted.
Nuclear energy as one of clear energy sources takes important role in economic development in CHINA, and according
to the national long term development strategy, many more nuclear powers will be built in next few years, so it is a great
challenge for uranium resources exploration. Research and practice on mineral exploration demonstrates that utilizing
the modern Earth Observe System (EOS) technology and developing new multi-source geological data mining methods
are effective approaches to uranium deposits prospecting. Based on data mining and knowledge discovery technology,
this paper uses multi-source geological data to character electromagnetic spectral, geophysical and spatial information of
uranium mineralization factors, and provides the technical support for uranium prospecting integrating with field remote
sensing geological survey. Multi-source geological data used in this paper include satellite hyperspectral image
(Hyperion), high spatial resolution remote sensing data, uranium geological information, airborne radiometric data,
aeromagnetic and gravity data, and related data mining methods have been developed, such as data fusion of optical data
and Radarsat image, information integration of remote sensing and geophysical data, and so on. Based on above
approaches, the multi-geoscience information of uranium mineralization factors including complex polystage rock mass,
mineralization controlling faults and hydrothermal alterations have been identified, the metallogenic potential of uranium
has been evaluated, and some predicting areas have been located.
Hyperspectral and high spatial resolution remote sensing technology take important role in uranium geological
application, data mining and knowledge discovery methods are key to character spectral and spatial information of
uranium mineralization factors. Based on curvelet transform algorithm, this paper developed the image fusion
technology of hyperspectral (Hyperion) and high spatial data (SPOT5), and results demonstrated that fusion image had
advantage in denoising, enhancing and information identification. Used discrete wavelet transform, the spectral
parameters of uranium mineralization factors were acquired, the spectral identification pedigrees of typical quadrivalence
and hexavalence uranium minerals were established. Furthermore, utilizing hyperspectral remote sensing observation
technology, this paper developed hyperspectral logging of drill cores and trench, it can quickly processed lots of
geological and spectral information, and the relationship between radioactive intensity and abnormal spectral
characteristics of Fe3+ was established. All those provided remote sensing technical bases to uranium geology, and the
better results have been achieved in Taoshan uranium deposits in south China.
Uranium deposit has very important status in our national defiance and economy qua a kind of strategic mineral
resources. It is important to point out which information should be extracted as ore-searching ones of uranium deposit.
In this study, a kind of high spatial resolution satellite data-QuickBird satellite data, with 0.6m class panchromatic (Pan)
and 2.4m multi-spectral stereoscopic data, was used to extract the ore-searching information of uranium deposit in
Bashibulake area at the north of Tarim basin. By using effective methods of image processing, the information of ore-bearing
bed, ore-control structure and mineralized alteration have been extracted successfully. The results show a high
consistency with the field survey. The aim of this study is to explore practicability of high spatial resolution satellite
data for prospecting minerals, and to broaden the thinking of ore-searching at similar areas.
Based on the status of remote sensing information application in China, from the aspect of geologic exploration, and new thinking of remote sensing information application, a new concept-"post-remote sensing application technology" has been put forward. The argument, the connotation, the technology construction, the research content and the application thinking are expounded and discussed in the paper. Taking uranium resources exploration in the north of Ordos basin for example, some key geologic problems have been studied and important achievements have been obtained. The practice indicates that the post-remote sensing application technology is of more values and better effect than these of single remote sensing technology. The new thinking of modern information technology in combination with traditional methods can also be used for reference to other fields of geosciences.
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