Multicriteria Geologic Data Analysis for Mineral Favorability Mapping: Application to a Metal Sulphide Mineralized Area, Ribeira Valley Metallogenic Province, Brazil

Springer Science and Business Media LLC - Tập 11 Số 1 - Trang 29-43 - 2002
de Araújo, Carlos César1, Macedo, Arlei Benedito1
1Sedimentary and Environmental Geology Department, Institute of Geosciences, University of São Paulo, São Paulo, SP, Brazil

Tóm tắt

GIS techniques have been used in the evaluation of favorability for base-metal mineralization in an area comprising the Cerro Azul and Apiaí quadrangles (SG.22-X-B-IV and V, scale 1:100.000), Ribeira Valley, São Paulo and Paraná States, Brazil. Methods have been employed for selection and weighting of prospective variables when applying GIS techniques to a digital database consisting of geological, geochemical and airborne geophysics, and mineral occurrence information. The exploration variable selection and analysis were based on two mineralization models: (1) Panelas type, vein-type carbonate hosted, and (2) Perau type, sedimentary-exhalative. The overlay was performed by weighted linear combination (WLC) and order weighted average (OWA) methods. Both methods proved suitable for the study area, yielding similar results. The ordered weighted averaging analysis provided the best results, with favorability maps showing a large number of classes occupying relatively minor areas. In comparison, the weighted linear combination analysis produced more coherent results but without details for minor areas. The prospective parameters obtained are considered suitable for both Perau and Panelas types. Both methods are inexpensive, and are suitable for selection of prospective areas during geological surveys in areas similar to the studied one.

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Tài liệu tham khảo

citation_title=Geographic information systems for geoscientists, modelling with GIS; citation_publication_date=1994; citation_id=CR1; citation_author=G. F. Bonham-Carter; citation_publisher=Pergamon Press

citation_journal_title=Photogrammetric Engineering and Remote Sensing; citation_title=Integration of geological datasets for gold exploration in Nova Scotia; citation_author=G. F. Bonham-Carter, F. P. Agterberg, D. F. Wright; citation_volume=54; citation_issue=11; citation_publication_date=1988; citation_pages=1585-1592; citation_id=CR2

citation_journal_title=Jour. African Earth Sciences, Spec. Abst. Issue; citation_title=Tectonics of southern portion of the Ribeira Belt (Apiaí Domain); citation_author=G. A. C. Campanha, G. R. Sadowski; citation_volume=27; citation_issue=1A; citation_publication_date=1998; citation_pages=220-221; citation_id=CR3

Cox, D. P., and Singer, D. A., 1986, Mineral deposit models: U.S. Geol. Survey Bull. 1693, 319 p.

Daitx, E. C., 1996, Origin and evolution of the Perau type sulphide deposits (Pb-Zn¡Ag), based on Canoas and Perau ore deposits (Ribeira Valley): unpubl. doctoral dissertation, Inst. Geosciences and Exact Sciences (UNESP), 453 p. (in Portuguese with English abstract).

citation_journal_title=Photogrammetric Engineering &; Remote Sensing; citation_title=Raster procedures for multi-criteria/multi objective decisions; citation_author=J. R. Eastman, W. Jin, A. K. Kyem, J. Toledano; citation_volume=61; citation_issue=5; citation_publication_date=1995; citation_pages=539-547; citation_id=CR6

citation_title=Idrisi for Windows, User's Guide, version 2.0; citation_inbook_title=Clark Labs for Cartographic Technology and Geographic Analysis; citation_publication_date=1997; citation_id=CR7; citation_author=J. R. Eastman; citation_publisher=Clark University

citation_journal_title=Proc. 29th Brazilian Geol. Congress (Ouro Preto); citation_title=Lead exploration in Brazil; citation_author=R. Fleischer; citation_volume=1; citation_publication_date=1976; citation_pages=19-32; citation_id=CR8

citation_title=Mineral resources appraisal; citation_publication_date=1984; citation_id=CR9; citation_author=D. P. Harris; citation_publisher=Clarendon Press

citation_title=Mineral exploration decisions; citation_publication_date=1990; citation_id=CR10; citation_author=D. P. Harris; citation_publisher=John Wiley &; Sons

citation_journal_title=Computers &; Geosciences; citation_title=Emulating expert system with raster GIS; citation_author=S. Z. Katz; citation_volume=17; citation_issue=7; citation_publication_date=1991; citation_pages=1033-1050; citation_id=CR11

citation_title=Oil exploration, basin analysis and economics; citation_publication_date=1992; citation_id=CR12; citation_author=I. Lerche; citation_publisher=Academic Press

citation_journal_title=Nonrenewable Resources; citation_title=Bayesian and multivariate methods applied to favorability quantification in Recôncavo Basin and Ribeira Belt, Brazil; citation_author=S. P. Rostirolla, P. C. Soares, H. K. Chang; citation_volume=7; citation_issue=1; citation_publication_date=1998; citation_pages=7-24; citation_id=CR13

citation_journal_title=Jour. Math. Psychology; citation_title=A scaling method for priorities in hierarchical structures; citation_author=T. L. Saaty; citation_volume=15; citation_publication_date=1977; citation_pages=234-281; citation_id=CR14

citation_journal_title=Nonrenewable Resources; citation_title=Basic concepts in three-part quantitative assessments of undiscovered mineral resources; citation_author=D. A. Singer; citation_volume=2; citation_issue=2; citation_publication_date=1993; citation_pages=69-81; citation_id=CR15

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