DOI: 10.1007/s00531-013-0877-5
Scopus记录号: 2-s2.0-84878982041
论文题名: Copper-bearing encrustations: A tool for age dating and constraining the physical-chemical regime during the late Quaternary in the Wadi Araba, southern Jordan
作者: Dill H.G. ; Techmer A. ; Botz R.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2013
卷: 102, 期: 5 起始页码: 1541
结束页码: 1561
语种: 英语
英文关键词: Cu encrustations
; Lake Lisan
; Late Pleistocene-Holocene
; Physical-chemical regime
; Southern Jordan
Scopus关键词: age determination
; copper
; diagenesis
; drainage
; encrustation
; felsic rock
; Holocene
; mineralization
; physicochemical property
; Pleistocene
; porewater
; Quaternary
; radiocarbon dating
; sedimentary rock
; supergene process
; Dead Sea
; Jordan
; Wadi Araba
英文摘要: The alluvial-fluvial drainage system in the Wadi Araba, southern Jordan, incised into Cambrian clastic sedimentary and felsic igneous rocks giving rise to a disseminated Cu-(Mn) mineralization of diagenetic and epigenetic origin along the southern branch of the Dead Sea Transform Fault (=DSTF). During the Late Pleistocene and Holocene, the primary Cu sulfides were replaced by secondary minerals giving rise to hypogene to supergene encrustations, bearing Cu silicates, Cu carbonates, Cu oxychlorides and cupriferous vanadates. They occur in fissures, coat walls and developed even-rim/meniscus and blocky cements in the arenites near the surface. The first generation cement has been interpreted in terms of freshwater vadose hydraulic conditions, while the second-generation blocky cement of chrysocolla and malachite evolved as late cement. The Cu-Si-C fluid system within the Wadi Araba drainage system is the on-shore or subaerial facies of a regressive lacustrine regime called the "Lake Lisan Stage", a precursor of the present-day Dead Sea. Radiocarbon dating (younger than 27,740 ± 1,570 years), oxygen-isotope-based temperature determination (hot brine-related mineralization at 60-80 °C, climate-driven mineralization at 25-30 °C) and thermodynamical calculations let to the subdivision of this secondary Cu mineralization into four stages, whose chemical and mineralogical composition was controlled by the variation of the anion complexes of silica and carbonate and the chlorine contents. The acidity of the pore water positively correlates with the degree of oxidation. The highest aridity and most intensive evaporation deduced from the thermodynamical calculations were achieved during stage 3, which is coeval with late Lake Lisan. Geogene processes causing Cu-enriched encrustations overlap with man-made manganiferous slags. The smelter feed has been derived mainly from Cu ore which developed during Late Pleistocene in the region. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878982041&doi=10.1007%2fs00531-013-0877-5&partnerID=40&md5=e1afccd66f0d1419a71ab329df828564
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70542
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: Federal Institute for Geosciences and Natural Resources, P.O. Box 510163, 30631 Hannover, Germany; Leibniz Institute for Applied Geophysics, P.O. Box 510163, 30631 Hannover, Germany; Geological-Paleontological Department, University Kiel, Olshausenstraße 40-60, 24118 Kiel, Germany
Recommended Citation:
Dill H.G.,Techmer A.,Botz R.. Copper-bearing encrustations: A tool for age dating and constraining the physical-chemical regime during the late Quaternary in the Wadi Araba, southern Jordan[J]. International Journal of Earth Sciences,2013-01-01,102(5)