DOI: 10.1016/j.jag.2017.05.012
Scopus记录号: 2-s2.0-85032189233
论文题名: Regolith-geology mapping with support vector machine: A case study over weathered Ni-bearing peridotites, New Caledonia
作者: De Boissieu F ; , Sevin B ; , Cudahy T ; , Mangeas M ; , Chevrel S ; , Ong C ; , Rodger A ; , Maurizot P ; , Laukamp C ; , Lau I ; , Touraivane T ; , Cluzel D ; , Despinoy M
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2018
卷: 64 起始页码: 377
结束页码: 385
语种: 英语
英文关键词: Classification
; Geology
; Hyperspectral
; Iron oxide
; Mapping
; Mineralogy
; Recognition
; Serpentine
; Spectroscopy
; Support vector machine
Scopus关键词: classification
; geological mapping
; iron oxide
; mineralogy
; multispectral image
; nickel
; peridotite
; regolith
; serpentine
; support vector machine
; New Caledonia [Melanesia]
英文摘要: Accurate maps of Earth's geology, especially its regolith, are required for managing the sustainable exploration and development of mineral resources. This paper shows how airborne imaging hyperspectral data collected over weathered peridotite rocks in vegetated, mountainous terrane in New Caledonia were processed using a combination of methods to generate a regolith-geology map that could be used for more efficiently targeting Ni exploration. The image processing combined two usual methods, which are spectral feature extraction and support vector machine (SVM). This rationale being the spectral features extraction can rapidly reduce data complexity by both targeting only the diagnostic mineral absorptions and masking those pixels complicated by vegetation, cloud and deep shade. SVM is a supervised classification method able to generate an optimal non-linear classifier with these features that generalises well even with limited training data. Key minerals targeted are serpentine, which is considered as an indicator for hydrolysed peridotitic rock, and iron oxy-hydroxides (hematite and goethite), which are considered as diagnostic of laterite development. The final classified regolith map was assessed against interpreted regolith field sites, which yielded approximately 70% similarity for all unit types, as well as against a regolith-geology map interpreted using traditional datasets (not hyperspectral imagery). Importantly, the hyperspectral derived mineral map provided much greater detail enabling a more precise understanding of the regolith-geological architecture where there are exposed soils and rocks. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79922
Appears in Collections: 气候变化事实与影响
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作者单位: UMR ESAPCE-DEV, IRD, BPA5, Noumea, New Caledonia; Geological Survey of New Caledonia, DIMENC, BP 465, Noumea, New Caledonia; CSIRO Mineral Resources Flagship, CSIRO, 26 Dick Perry Avenue, Kensington, WA, Australia; BRGM, BP 6009, Orleans, France; University of New Caledonia, BP R4, Noumea, New Caledonia
Recommended Citation:
De Boissieu F,, Sevin B,, Cudahy T,et al. Regolith-geology mapping with support vector machine: A case study over weathered Ni-bearing peridotites, New Caledonia[J]. International Journal of Applied Earth Observation and Geoinformation,2018-01-01,64