DOI: 10.1007/s00531-013-0987-0
Scopus记录号: 2-s2.0-84896529331
论文题名: Genesis of the hydrothermal gold deposits in the Canan area, Lepaguare District, Honduras
作者: Mattioli M. ; Menichetti M. ; Renzulli A. ; Toscani L. ; Salvioli-Mariani E. ; Suarez P. ; Murroni A.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 3 起始页码: 901
结束页码: 928
语种: 英语
英文关键词: Canan
; Central America
; Geochemistry
; Gold
; Honduras
; Hydrothermal alteration
Scopus关键词: Cretaceous
; emplacement
; gold
; hydrothermal alteration
; hydrothermal deposit
; hydrothermal fluid
; metallogenesis
; mineralization
; ore deposit
; quartz vein
; shear zone
; Honduras
英文摘要: The Canan area (Honduras) is characterized by a gold-bearing ore deposit that is associated with quartz-veined shear zones. Gold mineralization occurs in low-to medium-grade metamorphic host-rocks (graphitic and sericitic schists). Hydrothermal fluids, which are associated with the emplacement of Cretaceous-Tertiary granodioritic intrusions, are responsible for the formation of quartz veins and the hydrothermal alteration of wall-rocks. Three main altered zones have been detected in the wall-rocks as far as 150 cm from the quartz veins. The distal zone (up to 50-cm thick) contains quartz, chlorite and illite. The intermediate zone is the thickest (up to 80 cm) and is marked by quartz, muscovite, sulphides, kaolinite and native elements such as Au and Ag. The proximal zone, which is close to the quartz veins, is rather thin (up to 25 cm) and contains clay minerals, Al-oxides-hydroxides and sulphides. The transition from the distal to the proximal zone is accompanied by the enrichment of SiO2 and the depletion of all other major elements, except for Fe2O3(tot). Precious metals occur in the highest concentrations in the intermediate zone (Au up to 7.6 ppm and Ag up to 11 ppm). We suggest that gold was transported as a reduced sulphur complex and was precipitated from the hydrothermal solution by the reaction of the sulphur complexes with Fe2+ from the alteration of the mafic minerals of the host-rock. Fluid-wall-rock interactions seem to be the main cause of gold mineralization. Genetic relationships with a strike-slip fault system, hydrothermal alteration zones within the metamorphic wall-rocks, and an entire set of geochemical anomalies are consistent with orogenic-type gold deposits of the epizonal class. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896529331&doi=10.1007%2fs00531-013-0987-0&partnerID=40&md5=d420939882564f3578762948ed7431d4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70403
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Dipartimento di Scienze della Terra, della Vita e dell'Ambiente, Università di Urbino Carlo Bo, Campus Scientifico Enrico Mattei, 61029 Urbino, Italy; Dipartimento di Fisica e Scienze della Terra Macedonio Melloni, Università di Parma, Parco Area delle Scienze, 43100 Parma, Italy; Goldlake Group, Colonia Palmira, Av. Republica del Brasil casa N 2401, Tegucigalpa, MDC, Honduras
Recommended Citation:
Mattioli M.,Menichetti M.,Renzulli A.,et al. Genesis of the hydrothermal gold deposits in the Canan area, Lepaguare District, Honduras[J]. International Journal of Earth Sciences,2014-01-01,103(3)