Extraction of remote sensing alteration anomalies and prospecting prediction of porphyry Cu-Mo deposits in Narigongma,Qinghai Province
DENG Huijuan1, YAO Yutao1, PENG Guangxiong2, XIA Haodong1
1. Cores and Samples Center of Land and Resources, Yanjiao 065201, China; 2. MOE Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Central South University, Changsha 410083, China
Abstract：The North Sanjiang metallogenic belt in Qinghai Province has excellent metallogenic conditions and geological background to form large or superlarge metal deposits, and Narigongma is the most typical porphyry Cu-Mo deposit in this region. Based on the typical characteristics of alteration zoning of the porphyry Cu-Mo deposit and using the ASTER data,the authors extracted the remote sensing alteration anomaly information of kaolinization,propylitization,pyritization and silicification by using Crosta technology and band ratio method. The distribution map of granite porphyry and faults was obtained on the basis of remote sensing interpretation of the ASTER and QuickBird images. According to the metallogenic regularity and ore-controlling factors of the Narigongma deposit,eight mineral prediction areas were delineated based on the mineral predictive factors derived from remote sensing data. The remote sensing characteristics of alteration zoning of Narigongma can provide important reference information for the exploration of porphyry Cu-Mo deposits in the North Sanjiang metallogenic belt.
[1] 别小娟,张廷斌,孙传敏,等.藏东罗布莎蛇绿岩遥感岩矿信息提取方法研究[J].国土资源遥感,2013,25(3):72-78. Bie X J,Zhang T B,Sun C M,et al.Study of methods for extraction of remote sensing information of rocks and altered minerals from Luobusha ophiolite in east Tibet[J].Remote Sensing for Land and Resources,2013,25(3):72-78. [2] 刘文兰,张微.遥感构造蚀变异常信息提取及找矿预测——以老挝为例[J].国土资源遥感,2012,24(2):68-74. Liu W L,Zhang W.Remote sensing structural alteration information extraction and ore prognosis:A case study of Laos[J].Remote Sensing for Land and Resources,2012,24(2):68-74. [3] 程知言,赵培松.云南播卡金矿遥感蚀变信息提取及成矿预测[J].国土资源遥感,2011,23(2):135-140. Cheng Z Y,Zhao P S.The remote rensing alteration information extraction and metallogenic prognosis of the Boka gold deposit in Yunnan Province[J].Remote Sensing for Land and Resources,2011,23(2):135-140 [4] 潘彤,王富春.让青海三江北段找矿成果不断扩大[J].中国国土资源经济,2010(6):23-26. Pan T,Wang F C.Expanding the north zone of prospecting results in the Qinghai Sanjiang area[J].Natural Resource Economics of China,2010(6):23-26. [5] 张玉君,杨建民,姚佛军.用ASTER数据进行不同类型矿床蚀变异常提取研究[J].矿床地质,2006,25(增刊):507-510. Zhang Y J,Yang J M,Yao F J.The extraction of OHA from different types of deposits by using ASTER data[J]. Mineral Deposits,2006,25(sl):507-510. [6] 张玉君,杨建民,姚佛军.多光谱遥感技术预测矿产资源的潜能——以蒙古国欧玉陶勒盖铜金矿床为例[J].地学前缘,2007,14(5):63-71. Zhang Y J,Yang J M,Yao F J.The potential of multi-spectral remote sensing techniques for mineral exploration-taking the Mongolian Oyu Tolgoi Cu-Au deposit as an example[J].Earth Science Frontiers,2007,14(5):63-71. [7] 燕守勋,武晓波,周朝宪,等.遥感和光谱地质进展及其对矿产勘查的实践应用[J].地球科学进展,2011,26(1):13-29. Yan S X,Wu X B,Zhou C X,et al.Remote sensing and specteal geology and their applications to mineral exploration[J].Advances in Earth Science,2011,26(1):13-29. [8] 姚佛军.中国典型斑岩铜矿遥感蚀变分带模型研究[D].北京:中国地质大学(北京),2012. Yao F J.The study of remote sensing alteration zoning model of Chinese typical porphyry copper[D].Beijing:China University of Geosciences(Beijing),2012. [9] 杨志明,侯增谦,杨竹森,等.青海纳日贡玛斑岩钼(铜)矿床:岩石成因构造控制[J].岩石学报,2008,24(3):489-502. Yang Z M,Hou Z Q,Yang Z S,et al.Genesis of porphyries and tectonic controls on the Narigongma porphyry Mo(Cu)deposit,southern Qinghai[J].Acta Petrologica Sinica,2008,24(3):489-502. [10] 彭光雄.青海杂多铅锌多金属矿找矿异常分析与成矿定量预测方法研究[D].西宁:青海省地质调查院,2013. Peng G X.Study on extraction of prospecting anomalys and quantitative prediction of Pb-Zn deposits in Zaduo,Qinghai[D].Xi-ning:Qinghai Geological Survey Institute,2013. [11] Crosta A P,Souza C R,Azevedo F,et al.Targeting key alteration minerals in epithermal deposits in Patagonia,Argentina,using ASTER imagery and principal component analysis[J].International Journal of Remote Sensing,2003,24(21):4233-4240. [12] 彭光雄,高光明.新疆阿祖拜矿田伟晶岩型矿床遥感找矿综合信息研究[J].大地构造与成矿学,2013,37(1):109-117. Peng G X,Gao G M.Remote sensing prospecting of pegmatite deposits in the Azubai Region,Xinjiang[J].Geotectonica Et Metallogenia,2013,37(1):109-117. [13] Kalinowski A,Oliver S.ASTER mineral index processing manual[R].Remote Sensing Applications Geosciences Australia,2004. [14] 陈江,王安建.利用ASTER热红外遥感数据开展岩石化学成分填图的初步研究[J].遥感学报,2007,11(4):601-608. Chen J,Wang A J.The pilot study on petrochemistry component mapping with ASTER thermal infrared remote sensing data[J].Journal of Remote Sensing,2007,11(4):601-608.
2014, Vol. 26 
