globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-015-1237-4
Scopus记录号: 2-s2.0-84939864531
论文题名:
Hydrothermal dolomitization of basinal deposits controlled by a synsedimentary fault system in Triassic extensional setting, Hungary
作者: Hips K.; Haas J.; Győri O.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2016
卷: 105, 期:4
起始页码: 1215
结束页码: 1231
语种: 英语
英文关键词: Cherty dolomite ; Extensional basins ; Hydrothermal fluid ; Multiphase breccia fabric
Scopus关键词: dolomitization ; extensional tectonics ; fluid inclusion ; hydrothermal fluid ; synsedimentary tectonics ; tectonic setting ; Triassic ; Hungary
英文摘要: Dolomitization of relatively thick carbonate successions occurs via an effective fluid circulation mechanism, since the replacement process requires a large amount of Mg-rich fluid interacting with the CaCO3 precursor. In the western end of the Neotethys, fault-controlled extensional basins developed during the Late Triassic spreading stage. In the Buda Hills and Danube-East blocks, distinct parts of silica and organic matter-rich slope and basinal deposits are dolomitized. Petrographic, geochemical, and fluid inclusion data distinguished two dolomite types: (1) finely to medium crystalline and (2) medium to coarsely crystalline. They commonly co-occur and show a gradual transition. Both exhibit breccia fabric under microscope. Dolomite texture reveals that the breccia fabric is not inherited from the precursor carbonates but was formed during the dolomitization process and under the influence of repeated seismic shocks. Dolomitization within the slope and basinal succession as well as within the breccia zones of the underlying basement block is interpreted as being related to fluid originated from the detachment zone and channelled along synsedimentary normal faults. The proposed conceptual model of dolomitization suggests that pervasive dolomitization occurred not only within and near the fault zones. Permeable beds have channelled the fluid towards the basin centre where the fluid was capable of partial dolomitization. The fluid inclusion data, compared with vitrinite reflectance and maturation data of organic matter, suggest that the ascending fluid was likely hydrothermal which cooled down via mixing with marine-derived pore fluid. Thermal gradient is considered as a potential driving force for fluid flow. © 2015, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84939864531&doi=10.1007%2fs00531-015-1237-4&partnerID=40&md5=2bc5611f521bfc58fec61f9e8f948f5f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70164
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: MTA–ELTE Geological, Geophysical and Space Science Research Group, Pázmány s. 1/c, Budapest, Hungary

Recommended Citation:
Hips K.,Haas J.,Győri O.. Hydrothermal dolomitization of basinal deposits controlled by a synsedimentary fault system in Triassic extensional setting, Hungary[J]. International Journal of Earth Sciences,2016-01-01,105(4)
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