期刊
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
卷 202, 期 1-2, 页码 29-46出版社
ELSEVIER
DOI: 10.1016/j.jvolgeores.2010.12.018
关键词
Iberian Pyrite Belt; volcanic facies associations; massive sulfide deposits; rhyolite; Spain
资金
- Spanish Ministerio de Educacion y Ciencia [BTE2003-04354]
In order to assess the volcanic architecture of the VSC in the Iberian Pyrite Belt, Spain, a study of the volcanic and sedimentary lithofacies has been undertaken on a section up to 1000 m thick in the Odiel river, considered to be also representative of other areas of the Riotinto-Nerva Unit. Among other mineral deposits, this unit includes the world-class volcanic-hosted massive sulfide deposits of the Riotinto mining district. Several conclusions have been obtained: a) a complex, thick volcanic succession, as well as mafic and felsic sills and thin sedimentary intervals, predated the genesis of the sulfide deposits, which did not form in a dominantly sedimentary environment; b) two successive, felsic volcanic sequences can be distinguished, showing textural and chemical variations from bottom to top; c) mafic lithofacies decrease upwards in the sequence, and d) volcanic structures, eruption style and internal organization suggest a deep subaqueous depositional environment, which agrees with the depositional setting for massive sulfide deposits. (C) 2011 Elsevier B.V. All rights reserved.
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