Lithofacies characteristics and sedimentary model of a gravelly braided river-dominated fan: a case study of modern Poplar River alluvial fan (northwest Junggar Basin, China)

2021 ◽  
pp. 1-22
Author(s):  
D.-W. Liu ◽  
Y.-L. Ji ◽  
C.-L. Gao ◽  
J. Zhong ◽  
Y. Qi
Keyword(s):  
Junggar Basin ◽  
Alluvial Fan ◽  
Braided River ◽  
Sedimentary Model

scholarly journals Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene – a case study in the Żmigród Basin, southwest Poland

Geologos ◽  
2016 ◽  
Vol 22 (2) ◽  
pp. 105-120 ◽  
Author(s):  
Paweł Zieliński ◽  
Robert J. Sokołowski ◽  
Stanisław Fedorowicz ◽  
Barbara Woronko ◽  
Beata Hołub ◽  
...  
Keyword(s):  
Alluvial Fan ◽  
Luminescence Dating ◽  
Braided River ◽  
Gis Analysis ◽  
The Holocene ◽  
Sedimentary Succession ◽  
Late Weichselian ◽  
Stratigraphic Succession

Abstract Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic succession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river functioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni- to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.

scholarly journals Risk management on an alluvial fan: a case study of the 2008 debris-flow event at Villar Pellice (Piedmont, N-W Italy)

2010 ◽  
Vol 10 (5) ◽  
pp. 999-1008 ◽  
Author(s):  
M. Arattano ◽  
R. Conte ◽  
L. Franzi ◽  
D. Giordan ◽  
A. Lazzari ◽  
...  
Keyword(s):  
Debris Flow ◽  
Human Life ◽  
Alluvial Fan ◽  
Civil Protection ◽  
Emergency Situations ◽  
New Guidelines ◽  
Personal Accounts ◽  
Regional Authorities ◽  
North Western

Abstract. In the Piedmont Region (North-Western Italy), the regional authorities manage debris flow risk by following the ideal sequence of steps that are generally pursued in land planning and civil protection activities. Complex procedures and methods are elaborated and widely discussed with politicians, economists and the general public. On the contrary, in emergency situations, civil protection agencies generally prefer the adoption of simple and flexible criteria. In this paper, a catastrophic debris flow event, that occurred in 2008 in Villar Pellice, is described in this perspective, after an analysis of the triggering rainfalls and of the effects on human life and properties. The availability of a series of personal accounts coming from people who witnessed the occurrences before, during and after the event has allowed us to analyse, in detail, the dynamics of the event. Thanks to these accounts, it has been possible to propose new guidelines for the planning of the emergency activities in areas that are potentially prone to similar impulsive phenomena.

scholarly journals Uranium-series comminution ages of continental sediments: Case study of a Pleistocene alluvial fan

2010 ◽  
Vol 296 (3-4) ◽  
pp. 244-254 ◽  
Author(s):  
Victoria E. Lee ◽  
Donald J. DePaolo ◽  
John N. Christensen
Keyword(s):  
Alluvial Fan ◽  
Uranium Series

scholarly journals Fractures in Volcanic Reservoir: a case study of Zhongguai uplift in Northwestern Margin of Junggar Basin, China

2018 ◽  
Vol 22 (3) ◽  
pp. 169-174 ◽  
Author(s):  
Cunhui Fan ◽  
Qirong Qin ◽  
Feng Liang ◽  
Zenghui Fan ◽  
Zhi Li
Keyword(s):  
Oil And Gas ◽  
Volcanic Rocks ◽  
Junggar Basin ◽  
Pressure Change ◽  
Reservoir Permeability ◽  
Northwestern Margin ◽  
Genetic Mechanisms ◽  
Relationship Of ◽  
Oilfield Development

Fractures in Carboniferous volcanic rocks located at Zhongguai Area (China) highly influence the accumulation and productivity of oil and gas. As such, the study of development periods and genetic mechanisms of tectonic fractures could throw useful information regarding the evaluation and development of that reservoir. Their tectonic origins caused high-angle and oblique shear fractures. The primary orientation of those fractures appears close to EW (270°±10°), NW (300°±15°), NE (45°±15°), and SN (0°±10°). At least four fracture generations can be found in Carboniferous volcanic rocks at Zhongguai Area. Combined with a tectonic evolution, they are based on the segmentation relationship of the fracture fillings, the thermometry measurement of the fracture filling inclusion, and the acoustic emission, as well. Affected by a new horizontal principal stress, the opening and permeability of nearly EW fractures are the best. In this way, a priority in the development of well's patterns should be considered close to EW fractures. The pressure change in the process of exploitation may damage the reservoir permeability of fractured volcano rocks severely. Accordingly, well patterns should be adjusted to dynamic changes of permeability happened during the oilfield development since some differences have been detected in distinct fracture sets. 

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