An analysis of the effect from Altyn Fault upon Jiuquan Basin
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摘要:
阿尔金断裂带东延区与北祁连冲断带一起控制了酒泉盆地的形成和演化。作者利用区域地球物理资料的解释和分析，研究了阿尔金断裂走滑过程对酒泉盆地的控制作用和影响范围，认为阿尔金断裂走滑运动始于中生代白垩纪，初次隆升始于白垩纪，不晚于古新世；其东延应止于花海凹陷。阿尔金断裂带对酒泉盆地的控制作用主要表现为限制了盆地现今的西部边界，同时控制了盆地北段的构造形态。
Abstract:The eastern extension of Altyn Fault and the Qilian thrusting belt controlled the formation and evolution of Jiuquan Basin. This paper studies the function and range of the controlling of the Altyn Fault upon Jiuquan Basin, based on the interpretation and analysis of regional geophysical data. Our results indicate the movement and uplift of the Altyn Fault started in the Cretaceous, predating the Paleocene, and its eastern extension is considered to be limited within Huahai depression. The Altyn Fault defined the western boundary of Jiuquan Basin and controlled the structural features of its northern portion.
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Key words:
- Altyn Fault /
- Jiuquan Basin /
- Active period /
- Eastern extension /
- Controlling function
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图 1
阿尔金断裂带区域构造分布图
Figure 1.
Regional structure distribution of Altyn active fault system
图 3
柴达木盆地阿尔金山前带中生界残余厚度图
Figure 3.
Residual isopach map of Mesozoic strata of Qaidam Basin, adjacent to Altyn Mountain
图 4
柴达木盆地阿尔金山前带路乐河组残余厚度图
Figure 4.
Residual strata isopach map of Lulehe Fm. adjacent to Altyn Mountain in Qaidam Basin
图 5
阿尔金断裂带东段地质简图
Figure 5.
Geological sketch map of the eastern sector of the Altun fault
图 6
花海二维02-59地震剖面
Figure 6.
Geological interpretation of seismic profile 02-59 of Huahai area
图 7
花海二维02-75地震剖面
Figure 7.
Geological interpretation of seismic profile 02-75 of Huahai area
图 8
花海凹陷下白垩统下沟组地层残余厚度图
Figure 8.
Isopach map of Lower Cretaceous Xiagou Fm. of Huahai depression
图 9
花海凹陷下白垩统中沟组地层残余厚度图
Figure 9.
Isopach map of Lower Cretaceous Zhonggou Fm. of Huahai depression
图 10
过石大-黑山-花海地震剖面
Figure 10.
Geological interpretation of seismic profile of Shida-heishan-huahai area
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