The Application of High Spatial Resolution Data to Remote Sensing Geological Survey in the Luobusa Area, Tibet

Abstract

Abstract:

The study area is located in Luobusa region, Tibet. The Luobusa ophiolite contains the largest known chromitite deposits in China. The purpose of this paper is to carry on the geological interpretation of remote sensing images based on WorldView-2 high spatial resolution remotely sensed data. As compared with the more frequently used ETM+ and ASTER image, WorldView-2 sensor can provide much higher spatial resolution and spectral resolution in relative narrow spectral range. Ortho rectification, atmosphere correct and image fusion are applied to WorldView-2 image of the study area, and then according to the optimum index factor band combination 8-6-4 is selected to achieve false color composite and combining with true color band 5-3-2 so as to highlight the tone difference of different lithological units. At last, we take advantage of WorldView-2 high spatial resolution remotely sensed data to establish the remote sensing interpretation signs of main lithology units and structure. Thus, based on remote sensing image processing, geological interpretation and field investigation in this area, we can conclude that WorldView-2 high spatial resolution remote sensing images have the technical advantage and application prospect in geological resource exploration in those regions with high altitude and poor working conditions.

Key words: high spatial resolution, WorldView-2, remote sensing geological interpretation, field investigation, Luobusa, Tibet

CLC Number:

TP79
P627

YANG Weiguang, ZHENG Youye, LIU Ting, WANG Pengchong, WANG Chengsong, FENG Quanlin, GUO Tongjun. The Application of High Spatial Resolution Data to Remote Sensing Geological Survey in the Luobusa Area, Tibet[J]. Geoscience, 2017, 31(06): 1284-1293.

Figures/Tables 15

Fig.1 Regional geological map of Luobusa, Tibet

Table 1 Band parameters of WorldView-2 satellite

成像方式	推扫式扫描成像
传感器	全色波段	多光谱
分辨率	0.5 m	2 m
		蓝:450~510 nm
		绿:510~580 nm
		红:630~690 nm
波长	450~1 040 nm	近红外1:770~895 nm
		黄:585~625 nm
		海岸:400~450 nm
		红色边缘:705~745 nm
		近红外2:860~1 040 nm

Table 2 OIF results of different bands combination

波段组合方案	标准差和	相关系数和	OIF
861	627.654 854	2.737 397	229.288 939 1
851	532.812 906	2.682 793	198.603 808 0
841	601.792 588	2.718 914	221.335 646 5
831	575.576 406	2.700 500	213.136 976 9
864	727.229 738	2.848 618	255.292 123 4
863	701.013 556	2.797 687	250.568 972 2
753	580.642 100	2.846 857	203.958 997 6
761	602.125 322	2.753 109	218.707 403 9
751	507.283 374	2.745 784	184.749 919 9
741	576.263 056	2.750 203	209.534 734 7

Fig.2 WorldView-2 RGB (864) image of conglomerate and field photographs

Fig.3 WorldView-2 RGB (864) image of sandstone and field photographs

Fig.4 WorldView-2 RGB (532) image of marble

Fig.5 WorldView-2 RGB (864) image of slate and field photograph

Fig.6 WorldView-2 RGB (864) image of listwanite and field photographs

Fig.7 WorldView-2 RGB (864) images of peridotite and field photographs

Fig.8 WorldView-2 RGB (864) image of normal fault in Luobusa area and field photographs

Fig.9 WorldView-2 RGB (864) images of northern thrust fault in Luobusa ophiolite belt

Fig.10 WorldView-2 RGB (864) image of southern thrust fault in Luobusa ophiolite belt and field identification

Fig.11 WorldView-2 RGB (864) image of wrench fault in Luobusa area

Fig.12 WorldView-2 RGB (864) images of joint in Luobusa area

Fig.13 Interpreted diagram of WorldView-2 in the study area

References 35

[1]	张玉君, 杨建民, 姚佛军, 等. 多光谱遥感找矿信息提取实用技术[M]. 北京: 地质出版社, 2013:1-272.
[2]	王润生, 熊盛青, 聂洪峰, 等. 遥感地质勘查技术与应用研究[J]. 地质学报, 2011, 85(11):1700-1743.
[3]	IBRAHIM W S, WATANABE K, YONEZU K. Structural and litho-tectonic controls on Neoproterozoic base metal sulfide and gold mineralization in North Hamisana shear zone, South Eastern Desert, Egypt: The integrated field, structural, Landsat 7 ETM+ and ASTER data approach[J]. Ore Geology Reviews, 2016, 79:62-77. DOI URL
[4]	MWANIKI M W, MATTHIAS M S, SCHELLMANN G. Application of remote sensing technologies to map the structural geology of central region of Kenya[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2015, 8(4):1855-1867. DOI URL
[5]	GUHA A, GHOSH B, KUMAR K V, et al. Implementation of reflection spectroscopy based new ASTER indices and principal components to delineate chromitite and associated ultramafic-mafic complex in parts of Dharwar Craton, India[J]. Advances in Space Research, 2015, 56(7):1453-1468. DOI URL
[6]	王乐, 何政伟, 刘婷婷, 等. 西藏尼雄铜铁多金属成矿带遥感找矿模式与找矿方向[J]. 现代地质, 2012, 26(3):489-497.
[7]	张渊, 钱建平, 谢彪武, 等. 遥感蚀变和线性构造信息提取在西藏阿里住浪矿区一带的找矿应用[J]. 现代地质, 2013, 27(1):99-107.
[8]	宋晚郊, 张绪教, 高万里, 等. 东昆仑造山带巴颜喀拉山群ASTER岩性信息提取[J]. 现代地质, 2013, 27(1):116-123.
[9]	张志军, 刘世华, 孔迪, 等. 北巴颜喀拉山1∶5万区域地质调查中的遥感解译应用[J]. 现代地质, 2016, 30(5):1141-1149.
[10]	金剑, 田淑芳, 焦润成, 等. 基于地物光谱分析的WorldView-2数据岩性识别:以新疆乌鲁克萨依地区为例[J]. 现代地质, 2013, 27(2):489-496.
[11]	XONG F H, YANG J S, ROBINSON P T, et al. Origin of podiform chromitite, a new model based on the Luobusa ophiolite, Tibet[J]. Gondwana Research, 2015, 27(2):525-542. DOI URL
[12]	叶培盛, 江万, 吴珍汉, 等. 西藏泽当—罗布莎蛇绿岩的地球化学特征及其构造意义[J]. 现代地质, 2006, 20(3):370-377.
[13]	王希斌, 周详, 郝梓国. 西藏罗布莎铬铁矿床的进一步找矿意见和建议[J]. 地质通报, 2010, 29(1):105-114.
[14]	ZHOU M F. REE and PGE geochemical constraints on the formation of dunites in the Luobusa Ophiolite, Southern Tibet[J]. Journal of Petrology, 2004, 46(3):615-639. DOI URL
[15]	BAI W J, ROBINSON P T, HU X F, et al. The PGE and base-metal alloys in the podiform chromitites of the Luobusa opholite, Southern Tibet[J]. The Canadian Mineralogist, 2000, 38(3):585-598. DOI URL
[16]	李金阳, 杨经绥, 巴登珠, 等. 西藏罗布莎蛇绿岩中不同产出的纯橄岩及成因探讨[J]. 岩石学报, 2012, 28(6):1829-1845.
[17]	白文吉, ROBINSON P T, 方青松, 等. 藏南罗布莎蛇绿岩豆荚状铬铁矿中的铂族元素和贱金属合金[J]. 地球学报, 2004, 25(4):385-396.
[18]	翟裕生, 姚书振, 蔡克勤. 矿床学[M]. 3版. 北京: 地质出版社, 2011:1-434.
[19]	杨经绥, 白文吉, 方青松, 等. 西藏罗布莎蛇绿岩铬铁矿中的超高压矿物和新矿物(综述)[J]. 地球学报, 2008, 29(3):263-274.
[20]	王希斌, 鲍佩声, 邓万明, 等. 西藏蛇绿岩[M]. 北京: 地质出版社, 1987:1-336.
[21]	白文吉, 杨经绥, ROBINSON P T, 等. 西藏罗布莎蛇绿岩铬铁矿中金刚石的研究[J]. 地质学报, 2001, 75(3):404-409.
[22]	王恒生, 白文吉, 王炳熙, 等. 中国铬铁矿床及成因[M]. 北京: 科学出版社, 1983:1-227.
[23]	ZHOU J J, TIAN S F, WANG N, et al. Enhancement and application of WorldView-2 to geological interpretation[J]. Advanced Materials Research, 2014, 1010/1012:1237-1242. DOI URL
[24]	梅安新, 彭望琭, 秦其明, 等. 遥感导论[M]. 北京: 高等教育出版社, 2001:1-324.
[25]	焦润成, 秦彦平, 张淑云, 等. WorldView-2数据在沉积岩地区的遥感岩性增强方法初探[J]. 西北地质, 2014, 47(4):278-283.
[26]	陈玲, 张微, 周艳, 等. 高分辨率遥感影像在新疆塔什库尔干地区沉积变质型铁矿勘查中的应用[J]. 地质与勘探, 2012, 48(5):1039-1048.
[27]	杨金中, 孙延贵, 秦绪文, 等. 高分辨率遥感地质调查[M]. 北京: 测绘出版社, 2013:1-225.
[28]	张岚. 藏南罗布莎蛇绿岩边部石英菱镁岩成因及矿化作用[D]. 北京: 中国地质大学(北京), 2016:1-83.
[29]	刘新星, 陈建平, 曾敏, 等. 基于多源遥感数据的西藏羌多地区地质构造解译[J]. 国土资源遥感, 2015, 27(3):154-160.
[30]	赵佳楠, 田淑芳. 新疆塔什库尔干地区柯岗断裂性质及遥感地质解译[J]. 新疆地质, 2013, 31(2):152-155.
[31]	张瑞丝, 陈建平, 曾敏. 基于WorldView-Ⅱ遥感影像的西藏改则地区断裂构造解译研究及应用[J]. 遥感技术与应用, 2012, 27(2):266-274.
[32]	崔军文, 乔子江. 罗布莎铬铁矿区成矿构造条件的研究[J]. 矿床地质, 1983, 2(1):48-57.
[33]	白文吉, 杨经绥, ROBINSON P T, 等. 西藏罗布莎蛇绿岩铬铁矿中金刚石的研究[J]. 地质学报, 2001, 75(3): 404-409.
[34]	李德威. 西藏罗布莎豆荚状铬铁矿成矿演化的构造过程[J]. 现代地质, 1995, 9(4):450-458.
[35]	徐向珍. 藏南康金拉豆荚状铬铁矿和地幔橄榄岩成因研究[D]. 北京: 中国地质科学院, 2009:1-189.