DOI: 10.1007/s00531-013-0875-7
Scopus记录号: 2-s2.0-84878923613
论文题名: Long-lived crustal-scale fluid flow: The hydrothermal mega-breccia of Hidden Valley, Mt. Painter Inlier, South Australia
作者: Weisheit A. ; Bons P.D. ; Elburg M.A.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2013
卷: 102, 期: 5 起始页码: 1219
结束页码: 1236
语种: 英语
英文关键词: Flinders Ranges
; Fluid flow
; Hydraulic brecciation
; Hydrothermal alteration
; Mount Painter Inlier
Scopus关键词: basement rock
; clast
; crustal structure
; Delamerian orogeny
; exhumation
; fluid flow
; hydrothermal alteration
; hydrothermal fluid
; lithology
; megabreccia
; Proterozoic
; provenance
; size distribution
; Australia
; Flinders Range
; Mount Painter
; South Australia
英文摘要: The Palaeozoic Hidden Valley breccia in the Northern Flinders Ranges of South Australia is exceptional for (1) its size of about 10 km2, (2) the large continuous range in clast sizes from tens of microns to hundreds of metres and (3) thorough mixing of lithologies of different provenance, some originally kilometres apart stratigraphically. The size distribution follows a single fractal dimension of about unity over at least 6 orders of magnitude, implying that a single process was responsible for diminution from the 100 m scale, down to < mm. The breccia formed during >12 km exhumation which lasted about 200 Myrs, starting during the ~500 Ma Delamerian Orogeny and continuing during the Alice Springs Orogeny. Fluids released during exhumation were structurally focussed towards Hidden Valley, where an estimated 20 (5-30) km3 total fluid volume caused the extensive brecciation. Brecciation initiated in Neoproterozoic cover metasedimentary rocks, at a level that is now fully exhumed. As hydrothermal fluid ascent continued with ongoing exhumation, the level of brecciation shifted down into the underlying Mesoproterozoic basement rocks, taking with it clasts of cover rocks. In this model, rocks pass through the zone of brecciation, which can thus incorporate a variety of lithologies that were originally kilometres apart. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878923613&doi=10.1007%2fs00531-013-0875-7&partnerID=40&md5=f41472541b6ce6ef9efd1b025f93ea25
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70549
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: Department of Geosciences, Eberhard-Karls University Tübingen, Wilhelmstraße 56, 72074 Tübingen, Germany; Geology Division, SAEES, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa
Recommended Citation:
Weisheit A.,Bons P.D.,Elburg M.A.. Long-lived crustal-scale fluid flow: The hydrothermal mega-breccia of Hidden Valley, Mt. Painter Inlier, South Australia[J]. International Journal of Earth Sciences,2013-01-01,102(5)