Increasing new knowledge or learning about new skills is often the main factor that triggers search users to conduct exploratory searches. Due to the lack of knowledge of their problem domain, it is difficult to form a learning path about new knowledge or new functions in the minds of searchers in the early stage of performing exploratory search, often searching for unnecessary information, resulting in wasting search time, the search is inefficient. However, the current search system does not provide enough support to solve this problem. For this reason, this paper designs a query path recommendation method supporting exploratory search based on a search goal shift graph. In the initial stage of exploratory search, directly recommends a set of query paths for searchers based on the searcher’s initial query, helping the searcher to find appropriate learning objects and build efficient learning paths, avoiding the search for irrelevant information, thereby shortening the search time and improving the search efficiency.

Southeastward strain transfer in the middle-southern Longmen Shan (LMS) thrust belt not only can promote the development of fault-related folds and earthquakes in the piedmont, but also affect the seismogenic capacity of the middle-southern LMS thrust belt. However, the detailed transfer process remains elusive. In this work, we combine structural profile re-analysis, sandbox modeling and seismic statistics to illustrate the strain transfer process. Our main results indicate that: (1) the thickness of the shallow detachment (e.g. Middle-Lower Triassic gypsum-salt strata) is probably the main factor for differences in southeastward strain transfer within the domain between the middle-southern LMS thrust belt and Weiyuan-Moxi anticline. This is also supported by our sandbox model; (2) the seismogenic capacity in the southern LMS thrust belt is probably proportional to the corresponding shortening of the Range Front Blind Thrust (REST). Thus, seismogenic capacity in the seismic gap zone is weaker than those of other segments of the southern LMS thrust belt, which is probably < Ms 7.0. (3) The weak seismogenic capacity (< Ms 7.0) and formation of the seismic gap is probably attributed to weak petrophysical properties and enhanced southeastward strain transfer. It is worth noting that the 1970 Dayi Ms 6.2 earthquake probably released most energy of the seismic gap. Further, this work also sheds light on the evaluation of seismic hazard in the LMS and other orogenic belts.

The first, third and fifth members (henceforth referred to as T(3)x(1), T(3)x(3) and T(3)x(5), respectively) of the Upper Triassic coal-bearing Xujiahe Formation black shale are among the most significant hydrocarbon source rocks in the Sichuan basin. Here, we present geochemical data for the Upper Triassic black shales from core from Well LD-1 to determine their paleoenvironmental conditions, paleoweathering, provenance transitions and tectonic setting. The V/(V + Ni) vs. U/Th, V/Cr vs. U/Th and Ni/Co vs. U/Th bivariate plots and the TFe-TOC-TS (total Fe-total organic carbon-total Sulphur) ternary diagram indicate that the synsedimentary redox regime of almost all the shale samples was oxidizing. Ba/Al, Sr/Al and P/Ti data combined with quantitative biogenic Ba data indicate that moderate-high primary paleoproductivity levels prevailed during deposition. The Sr/Cu ratio and C-value combined with the sedimentary features are indicative of warm-humid climate conditions. The Ti/Al deposition rate proxy and decompacted sedimentation rate are positively correlated with the total organic carbon (TOC) content. According to our multiproxy approach, black shale development in the Xujiahe Formation was mainly controlled by the primary productivity level, foreland basin setting, high tectonic subsidence and sedimentation rate and exhibited a limited correlation with water column redox conditions. Through the compilation and calculation of various weathering indices for the Xujiahe black shale, we suggest that caution must be taken when inferring paleoclimate characteristics based on the chemical index of alteration (CIA) because of the influence of multiple nonweathering factors. Provenance-sensitive elemental ratios (Th/Sc vs. Zr/Sc and Co/Th vs. La/Sc) indicate that the elastic contribution to Xujiahe black shales was of a predominantly felsic character. The black shales exhibit a transition from T(3)x(1), T(3)x(3) and T(3)x(5), whereby T(3)x(1) was primarily sourced from the Proterozoic to early Paleozoic strata of the Qinling orogeny, T(3)x(3) was primarily sourced from the Neoproterozoic complex in the Longmen Shan, and T(3)x(5) was primarily sourced from the Songpan-Ganzi flysch strata, which contributed recycled material because of folding and strong southeastward thrusting.

A giant, high-position rockslide occurred in Xinmo village of Maoxian County, Sichuan, China, on June 24, 2017. It was the largest rockslide recorded since the 2008 Wenchuan earthquake, and caused great loss. We use field survey data and relevant information to describe the geometric and zoning of the Maoxian landslide, and we discuss its sliding mechanism and the role of active faults in its formation. The sliding mode of the Maoxian landslide involves a plane failure mechanism (sliding rupture), while the slipping process can be divided into two stages: a rock cracking and deterioration stage, and a high-speed sliding stage. The role of active faults (earthquake and fault movement) is probably the most important factor in the Maoxian landslide formation, while lithology played a catalytic role and rainfall acted as an inducing factor. The fault vertical combination model (“back thrust” dynamic model) proposed in this paper provides a reasonable explanation for the different distribution of the coseismic landslides caused by the 1933 M 7.5 Diexi earthquake. We consider that a steep slope near the active fault, especially where the active fault intersects, just like the “locked segment” of a fault, is the uppermost area to develop a large landslide.

基于SRTM DEM数据,以青藏高原东缘龙门山地区为研究区域,本文通过条带状剖面分析、古地形面(残余面)恢复以及弹性挠曲模拟等研究手段,计算了青藏高原东缘龙门山地区晚新生代地壳均衡隆升与地表剥蚀之间的定量关系,探讨了龙门山地区表面剥蚀作用与均衡隆升作用之间的地表响应过程,从而为研究青藏高原东缘龙门山地区晚新生代以来的剥蚀—成山作用的隆升机制提供定量依据.研究表明:(1)晚新生代以来龙门山的地表剥蚀量为(0.74～1.14)×105 km3;(2)大量的地表剥蚀作用驱动了青藏高原东缘龙门山的地壳均衡反弹,使龙门山隆升了近2 km;(3)龙门山地区地表剥蚀量和均衡隆升量具有空间匹配性,岷山断块及龙门山中、南段的均衡隆升量高于青藏高原东缘其它区域,反映了晚新生代以来龙门山地区在不同分段内差异化的构造地貌形态及与剥蚀—隆升相关的地表过程.(4)龙门山的隆升是多期、多种隆升机制叠加的产物,其隆升过程具有历史性和复合性.均衡隆升和剥蚀作用在相似的时间尺度上和空间尺度上控制着龙门山地貌的形成,约束了青藏高原东缘龙门山的隆升机制.

The Longmen Shan(Longmen meaning Dragon's Gate,Shan meaning mountains)striking NE to SW is located in the eastern margin of Tibetan Plateau.This mountain does not only have the steepest topographic gradient in any margin around the modern-day Tibetan Plateau,but also is the most representative active fault showing strong activity characteristics of Late Quaternary along the eastern margin of Tibetan Plateau in the Bayanhar Block.In addition,it is an area in which the change of river geomorphology has a sensitive and direct response to tectonic activity.In recent years,the apparent seismic activities around Longmen Shan have included the Wenchuan Earthquake (Ms8.0),the Lushan Earthquake (Ms7.0),and the Jiuzhaigou Earthquake (Ms7.0),which occurred in 2008,2013,2017,respectively.Especially,the development of water system pattern is the most meaningful geological event that was accurately and completely recorded during the uplift process of Late Quaternary in the area with the most active tectonic movements.Thus,Longmen Shan area has been one of the best places to study the relationships among tectonic,geomorphy and river system.Based on the ASTER GDEM data,this study extracts 12 longitudinal profiles of bedrock river channels,including Yaque River (R1),Linguan River (R2),Chujiang River (R3),Minjiang River (R4),Jianjiang River (R5),Jinhe River (R6),Mianyuan River (R7),Anchang River (R8),Tongkou River (R9),Pingtong River (R10),Fujiang River(Rll),and Qingzhu River(R12) in Longmen Shan area by using simple mathematical functions to match the rivers' longitudinal profiles,and tries to analyze the geomorphological features of rivers system (including S-A double logarithmic curve,values of the concavity index (θ) and steepness index log (ks)),which responded to uplift process in different segments of Longmen Shan.Firstly,the result shows that there are three different types of the fitting results for the longitudinal profiles of rivers in Longmen Shan.The first one is logarithmic function which is fitted to the longitudinal profile of 8 rivers(R3,R5,R6,and R8～ R12),the second one is exponential function which is fitted to the longitudinal profile of 3 rivers(R1,R2,and R7),and the third one is linear function which is matched with the longitudinal profile of 1 river(R4).It indicates that there is a high uplift rate in Longmen Shan area,which has a strong river erosion rate in this area.Secondly,the double logarithmic curves (LogS-LogA figures,the slope of bedrock channels is S and the catchment area is A) of these rivers fall into three types:The convex line (up convex),the notching line (down convex) and the straight line.The double logarithmic curves of the rivers developed in the south segment (R 1 ～ R4)and middle segment(R5～ R8)of Longmen Shan are up convex line and straight line,the rivers in the north segment (R9 ～ R 12) showing straights line.The results indicate that the south segment and middle segment of Longmen Shan have a higher uplift rate than the north segment.In addition,the values of the concavity index(θ) and steepness index(log(ks))are affected by many factors,such as watershed area,glacial melt water,differential uplifting tectonic movement and so on.In total,the value of concavity index(θ) in the north segment(R9～ R12)of Longmen Shan is about ＞0.40,and the value of steepness index(log(ks)) is 0.97～ 1.37,less than the value of steepness index(log(ks)),which is 1.23 ～ 2.40 in the middle segment(R5 ～ R8)and south segment(R1～ R4)of Longmen Shan.It shows that the topography relief is with equilibrium stage in the north segment of Longmen Shan,and the value of the steepness index(log(ks)) increases gradually from north to south,indicating the tectonic uplift rate gradually becomes strong.So it is not only a response of tectonic geomorphology to active tectonics of Longmen Shan in the Late Quaternary,but also is reflected to the difference of uplift process of Longmen Shan in the eastern margin of Tibetan Plateau.

This study examines the relationship between high positive isostatic gravity anomalies (IGA), steep topography and lower crustal extrusion at the eastern margin of the Tibetan Plateau. IGA data has revealed uplift and extrusion of lower crustal flow in the Longmen Shan Mountains (the LMS). Firstly, The high positive IGA zone corresponds to the LMS orogenic belt. It is shown that abrupt changes in IGA correspond to zones of abrupt change of topography, crustal thickness and rock density along the LMS. Secondly, on the basis of the Airy isostasy theory, simulations and inversions of the positive IGA were conducted using three-dimensional bodies. The results indicated that the LMS lacks a mountain root, and that the top surface of the lower crust has been elevated by 11 km, leading to positive IGA, tectonic load and density load. Thirdly, according to Watts's flexural isostasy model, elastic deflection occurs, suggesting that the limited (i.e. narrow) tectonic and density load driven by lower crustal flow in the LMS have led to asymmetric flexural subsidence in the foreland basin and lifting of the forebulge. Finally, based on the correspondence between zones of extremely high positive IGA and the presence of the Precambrian Pengguan-Baoxing complexes in the LMS, the first appearance of erosion gravels from the complexes in the Dayi Conglomerate layer of the Chengdu Basin suggest that positive IGA and lower crustal flow in the LMS took place at 3.6 Ma or slightly earlier.

On June 24,2017,a large rocky landslide occurred at the Xinmo village,Maoxian County,Sichuan,after the Wenchuan earthquake in 2008.The landslide is huge and destructive,resulting in huge loss of life and property.Based on the field survey data and other collected data,the geometric characteristics and sedimentary characteristics of the Maoxian landslide are studied,the characteristics and effect of rainfall,historical earthquakes and active faults on the landslides are discussed,and the sliding mechanism and dynamic mechanism of Maoxian landslide are proposed.The study reveals that the landslide is located in the special area clamped by Songpinggou fault and the Minjiang fault with a steep slope landform and the faults are characterized by "X" pattern in the plane with a back thrust mode in the profile.Investigation shows that intense historical earthquakes have occurred in the area and the strong repetitive vibration destroyed the rock mass structures.Therefore,the active faults and historical earthquakes in the area are the main factors responsible for the formation of the Maoxian landslides,and the rainfall is only the predisposing factors trigger the landslides.The in site investigation also demonstrates that the sliding model of Maoxian landslide is characterized by layer parallel pull-apart together with slope parallel sliding.These are 3 stages in the formation processes of Maoxian landslide,beginning with the mountain rock cracking stage,then the high speed crushing stage and followed by debris flow accumulation stage.The steep slope and downward grade provide potential energy for the landslide.Well developed permeability interface between meta-sandstone and slate provide sliding condition bringing in the layer parallel pull-apart and slope parallel sliding.The fault compression induced uplift of Fugui Mountain,together with the accumulation of high-intensity historical earthquake vibration and accumulation of deformation,which resulted in long-term damage to the mountain rock structure,are the fundamental factors leading to the Maoxian landslide.

By analyzing the multi-year runoff and rainfall data at 15 hydrological stations from 1980 to 2007, as well as monthly runoff data from 1964 to 1984 at the Zipingpu hydrologic station, the relationship between precipitation and runoff has been established and the trend was explored. Based on the catastrophic floods of August 13 and August 18, 2010, characteristics and control factors on the post-seismic floods are summarized. Firstly, the Wenchuan earthquake and rupture zone provides the background for post-seismic floods to develop in the upper Minjiang River, which follows a post-seismic disaster-chain pattern: earthquake collapse to landslide debris flows to floods. Secondly, heavy rainfall controlled by the orographically-enhanced precipitation after the Wenchuan earthquake is the trigger factor for the development of devastating post-seismic floods. Thirdly, the post-seismic floods contain high sediment discharge, cause abrupt and severe damages, and have a large of volume and higher frequency.

The 2008 Wenchuan great earthquake triggered the coseismic vertical displacements on the surface of the Longmenshan and foreland region. Based on the theory of elastic flexure model for thrust belts and foreland basins, this study conducted elastic flexure modeling for inversion of deformation data. Combining with the study on the deep geophysical characteristics (Poisson ratio, electrical structure), we determined the spatial distribution features of the effective elastic thickness (T-e) in the Longmenshan foreland basin: the T-e decrease from east to west, its values in the western Sichuan basin (10 similar to 20 km) are obviously smaller than the middle Sichuan basin (30 similar to 40 km). Based on the theoretical elastic flexure model and the structure of the Longmenshan foreland basin since Late Triassic, the changing trend of T-e was inverted. It has decreased in the foredeep (the western Sichuan basin) of the Longmenshan foreland basin since Late Triassic. This change may be related with the long-term fusion in response to heating of the asthenosphere matter under the Songpan-Garze block, and reflects the coupling relationship between the dynamic processes of earth's deep interior and the surface evolution of the basin.

The Jiuzhaigou Ms 7.0 earthquake in 2017 occurred in the eastern margin of the Tibetan Plateau after the Wenchuan Ms 8.0 earthquake in 2008 and the Lushan Ms 7.0 earthquake in 2013.Comprehensive analysis of seismic source mechanism solution of the earthquake,historical earthquakes,distribution of aftershocks and historical earthquake,regional stress field,active faults are carried out in order to unravel the seismogenic structures and dynamic mechanism of the Ms 7.0 Jiuzhaigou earthquake.The preliminary research shows that:(1) The epicenter of the earthquake is located in the intersection area among the Tazan fault,the Minjiang fault and the Huya fault,and the intersection position of active faults has a controlling effect on the occurrence of the strong earthquake.(2) The seismogenic fault of the earthquake is Huya fault a NNW-trending fault with a large tilting angle,characteristic of a high dipping angle,sinistral strike-slip earthquake.(3) The earthquake is located in seismic gap inthe northern part of the northern segment of the Huya fault,filled the seismic gap of over Mw 6.0 earthquakes in 1973 and 1976.(4) The earthquake is located in the Coulomb stress increase area of Wenchuan Ms 8.0 earthquake,and it is likely that the earthquake is the results of stress transmission of Wenchuan earthquake.(5) The earthquake is located in thenortheastern part of the Bayankala Block,and the dynamic mechanism of the earthquake is the northeastward extrusion of lower crustal flow in the eastern margin of the Tibetan Plateau.

Depending on the analysis of the coeval sedimentary geometry and subsidence mechanism in the Longmen Shan foreland basin, three models about the coupling relationship between Longmen Shan uplift and foreland basin subsidence since the Indosinian have been proposed: (1) crustal shortening and its related wide wedge-shaped foreland basin, (2) crustal isostatic rebound and its related tabular foreland basin, and (3) lower crustal flow and its related narrow wedge-shaped foreland basin. Based on the narrow wedge-shaped foreland basin developed since 4 Ma, it is believed that the narrow crustal shortening and tectonic load driven by lower crustal flow is a primary driver for the present Longmen Shan uplift and the Wenchuan (Ms 8.0) earthquake.

According to the China Seismic Network,on August 3,2014 (Beijing time),an MS6.5 earthquake occurred in Ludian County,Zhaotong City,Yunnan Province,China.A comprehen-sive analysis of the regional tectonic activity,aftershock distribution,focal mechanism solutions, and other features obtained the following results.(1)The focal mechanism solutions for the main shock and aftershocks that exceeded MS4 indicate that the Ludian earthquake had two directions:NE and NW.Furthermore,the main direction of the spatial distribution of aftershocks was NW,which was also the direction of the long axis of the intensity distribution.All of this evidence indi-cates that the triggering seismic fault was the Baogunao-Xiaohe fault,which has a NW strike. (2)On the basis of GPS measurements of the horizontal movement rate of the earth’s surface of the Ludian earthquake area,during the period 1 999 -2007 and the shortening rate of the Zhao-tong fault for 1 999-2013,we determined that the western block of the Baogunao-Xiaohe fault moved faster than the eastern block.This finding indicates that after colliding with the South China Block,the two fault blocks have differential thrust.The Zhaotong-Lianfeng fault consists of two thrust dextral strike-slip fault zones that strike NE:in this fault zone,the Baogunao-Xi-aohe fault cuts the Zhaotong-Lianfeng fault.On the other hand,the Baogunao-Xiaohe fault has a NW strike direction,high inclination,sinistral strike-slip,and a short extensional length.From this evidence,it is apparent that this is a typical tear fault.In addition,the seismic depth of the Zhaotong-Lianfeng fault during 1 980—201 1 was about 0~20 km,indicating that the Baogunao-Xiaohe fault is at shallow depth.In general,the Baogunao - Xiaohe fault is a thin-skinned, constant-direction,differential-thrust type of tear fault.(3)The Zhaotong-Lianfeng fault is in accordance with the “conduit flow”theory in its dynamic source direction (NE),style of fault combination,and depth of the main shock (about 15 km).In addition,the basal slip of the Zhao-tong fault is deeper than that of the Lianfeng fault,which is on the northwest side of the Zhao-tong fault.Therefore,the movement of the Zhaotong-Lianfeng fault is closely related to conduit flow,and the Baogunao-Xiaohe fault is probably controlled by deep conduit flow.The northern section of the Zhaotong-Lianfeng fault has a stronger resistance than the southern section,and the high-speed conduit flow drags the brittle upper crust.The conduit flow moves from NW to SE.When the flow meets the Zhaotong - Lianfeng fault,which is the boundary between the Daliangshan secondary block and the relatively stable South China block,it is obstructed differ-ently (the resistance to the north is stronger)by the South China Block.This causes the conduit flow west of the Baogunao-Xiaohe fault to move faster than the flow to the east of the fault. However,drag from the conduit flow can cause the block to move,because the speed of the con-duit flow is far greater than that of the upper crust.Thus,the western block moves faster than the eastern block,which left-lateral slip on the Baogunao-Xiaohe tear fault in order to adjust for the different thrust in two blocks.This was the mechanism that caused the Ludian MS6.5 earth-quake.

本文基于ASTER GDEM数据,采用简单数学函数拟合龙门山地区15条河流的河流纵剖面形态,并结合基岩水力侵蚀模型来分析龙门山不同段落的地形形态特征.初步获得以下几点认识:(1)通过对龙门山地区河流纵剖面的分析,龙门山整体上具有较强的隆升速率,导致这一地区强烈的河流侵蚀作用;(2)龙门山中段和南段的河流双对数图以上凸型为主,说明该区域未达到均衡状态,处于前均衡期;(3)龙门山北段的河流双对数图呈直线形态,说明该区域达到均衡状态,处于均衡期;(4)龙门山中段和南段具有更强的构造活动性、更高的隆升速率,控制了该地区地貌、水系演化过程,并且导致这一地区容易发生地质灾害.

基于ArcGIS10.1,以SRTM3为使用数据,对甘孜—玉树断裂带北西段及其周边地区从地形形态和水系特征两个方面行分析,归纳了该区的地貌特征以及地貌形态与断裂之间的关系.分析结果表明:1.甘孜—玉树断裂带北西段及其周边地区的坡度范围在0°～ 80°之间,并且与断裂的几何分布有相关性;2.该区地形起伏度在0 ～ 1579m之间,以山地地形为主;3.通过对比分析研究区最大高程图、平均高程图及最小高程图,发现研究区地形呈台阶状并且高的台地边界不断退缩,水系面积不断扩大;4.研究区域内山体上部有多级夷平面发育,主要夷平面在5000m左右,地形起伏度大,呈高山峡谷或者高山盆地的地貌样式间隔排列;5.水系密度分为5级,范围在0 ～0.4km/km2之间,与断裂走向大致相当.另外,多条切过断裂的分支河流,一致性地左旋错动,并且水系密度最高值区域与区域断裂的展布格架基本吻合,断裂对水系展布的控制占主导作用.

The coseismic surface uplift of the Longmen Shan (LMS) created an instantaneous topographic load over the western margin of the Sichuan Basin, where surface subsidence, decreasing eastward, has been measured using several methods, such as GPS, SAR and levelling. Using an elastic flexural model, we aim to interpret the coseismic surface uplift and subsidence, and constrain the effective lithospheric elastic thickness ( T e ) of the Sichuan Basin. Using different effective elastic thickness values for the Sichuan Basin, a series of subsidence curves were computed by the elastic flexure model equation for a broken elastic plate. The curves, produced by models using an effective elastic thickness of 30–40 km, provided the best fit to the general pattern of observed coseismic subsidence of the Sichuan Basin. However, the calculated subsidence (∼40–70 cm) at the front of the LMS is evidently lower than the observed values (∼100 cm), suggesting that the effective elastic thickness therein should be lower. These results indicate that the lithospheric strength may decrease westward from the Sichuan Basin to the LMS.

Based on DEM,the information of river networks of the Ganzi-Dege section of Yalong River basin is extracted by ArcGIS10. 2 software. Through the grid simulation method,the fractal dimension of the Yalong River and Yulong River is calculated. The fractal dimension of the Yalong River is 1. 1036 and the data of Yu-long River is 1. 0169. According to the relationship between catchment threshold and fractal dimension,the rea-sonable catchment threshold is confirmed as 5000 . According to the data of fractal dimension and predecessors’ research data,the physiognomy of the study area is in infancy,and the down cutting is typical of the river. The crust uplift leads to the increase of fractal dimension,but the effect degree needs further research. The Ganzi-Yushu fault leads to the linearization of the watercourse and the decrease of fractal dimension.

通过对川科一井、WFSD-1、WFSD-3井的岩芯资料以及露头标本的测试研究表明:龙门山前陆盆地须家河组砂岩主要由陆源碎屑颗粒、自生非黏土矿物及黏土矿物构成.通过对其孔隙度的大小计算,以及孔隙度与砂岩骨架成分的相关性研究,本文认为,龙门山前陆盆地为陆相盆地,空间展布面积较小、物源区距离较近,沉积相迅速变化导致了研究区砂岩特殊的内部组成、成分与孔隙度的特殊关系.因而指出:研究区致密砂岩成分配比适合孔隙发育,孔隙度随成分线性变化,是天然气藏潜在的有利储层.

Based on the fractal theory, the fractal dimension values of the southeast segment of Ganzi?Yushu fault is calculated by grid method, and analysis of the characteristics of fractal and activity is done by the contour map and relevant data. The study shows that the fractal dimension value of the study area is 1. 5443, and there is a good self?similarity in the scale range of 1 to 10 kilometers. The NW fault has higher fractal dimension values than the NE fault, and the NW fault has more powerful control action than the NE fault. The SW side of the Ganzi?Yushu fault has a larger fractal dimension value than the NE side, and it shows that the SW side is more active and more complex on fault distribution than NE side. The fractal dimension values could reflect to the activity and fault distribution well. And the Ganzi?Yushu fault is in the“active” phase, and there is a higher likelihood of earthquake in the study area.

通过SRTM数字高程数据,提取龙门山南段山前地区的西河、出江河、斜江河、文井河、三郎河和泰安河6条河流流域,进行河网分级,计算分析河流分支比、集水盆非对称、面积高程积分、地形起伏度等地貌参数,得到以下结论:1)研究区域中构造活动性从NW往SE减弱;高值区域集中于NW部的山地区域,尤其是双石-大川断裂的NW侧,反应了双石-大川断裂较强的构造活动性.2)研究区域中双石-大川断裂以烂泥坝为界分为2段,其NE段活动性有所减弱.3)河流主干通过双石-大川断层时,形成的河流转向,反映出双石-大川断裂的右行性质及其对水系的控制作用.4)次集水盆地河流偏向形成似环状,可能表明此处剥蚀较强烈;河流偏向向四周发散,可能表明此处抬升较为强烈.5)研究区域的应力方向为NW-SE向.