On calculation,the cumulative horizontal extension amount of the study area in the Cenozoic is about 2.5 to 3.5 km,reflecting a situation of lateral extension of the area.
This paper uses balance profile restore method to study the structural subsidence of horizontal extension in different sedimentary period and its genesis mechanism of Baiyinchagan Sag, discusses the sedimentary filling evolution and development characteristic, and determines their relation to hydrocarbon migration, reservoir formation and accumulation.
The results suggest that during the development of the Jiyang Depression, The lithosphere might be thinned not only passively by horizontal extension, but also thinned actively by some vertical factors;
The analyses also indicate that, in addition to the passive factor of horizontal extension, by which the asthenosphere was perturbed thermally and then experienced quick thermal decay, some other active factors, such as lithosphere delamination and mantle lithosphere metasomatism, can be candidate mechanism for the post-rift unconformity and the accelerated subsidence.
The compute model of forming depth and horizontal extensional quantity of different types of extensional tctonics are deduced according to the scale of fault subsidece basin, the depth of inner basin cover,strata attitude and the characteristics of geometry and kinematics of fault which control ba sin.
The compute model of forming depth and horizontal extensional quantity of different types of extensional tctonics are deduced according to the scale of fault subsidece basin, the depth of inner basin cover,strata attitude and the characteristics of geometry and kinematics of fault which control ba sin.
The extension rate is estimated to be about 1.2—2.5 m/Ma, the volume ofextension is around 8—20km in the Shahezi period, which takes about 60% of the volume of total extension. Little contraction was achieved in the later-Shahezi Period.
The extension rate is inferred to be about 0.36—0.66 m/Ma and the volume of extension is around 2-5 km during the Shahezi Period, which takes about 20% of the total extension of the faulted basin.
Cloning efficiency in soft agar of Ts and Tb were 62.1 and 48.0 respectively. The number of metastatic foci in the Ts and Tb on lung surface in the nude mice were 50.3 + 45.7 and 17.5 ?
(B)Tree roots on seawall has special distributivecharacteristics. Their horizontal roots consist of 2 to 3 main side roots which develop along the seawalland only a few smaller side roots develop toward seawall.
The lateral extensional ratio is varied in different parts of the studied area, the amount of lateral extension became larger from the northeast to the southwest, and correspondingly, the time of major extension became later from the southwest to the northeast.
It is found that the "lifetime" of the small-scale layered irregularities is no less than 2 days and that their horizontal extension in the meridional direction can exceed ～130 km.
This process is thought to have occurred concurrently with the horizontal extension and tectonic denudation of the upper crust, which, in turn, induced the massive release of fluids.
Such systems are composed of cells controlled by balanced arrangement of the tectonic flow and consisting, in turn, of domains of horizontal compression and horizontal extension alternating in chessboard order.
The estimates of excess pore water pressures together with fault geometries and horizontal extensional strains, determined from the geometry of the subducting oceanic plate, can be used to constrain the stress conditions at failure.
This phase of Rayleigh wave motion was dominated by horizontal extensional stresses reaching 25 kilopascals.
例句来源
The horizontal extension of the crust is an important factor in the forming of intracontinental block-faulted basins. In basement rocks of mountain areas, low angle denudational faults and subhorizontal ductile shear zones represent the shallow and deeper level extensional structures respectively. Their characteristics have been discussed in this paper. Within the pre-Cenozoic sequence in West Hill of Beijing, it has been found that there are several denudational faults and subhorizontal ductile shear zones...
The Qinling orogenic belt is divided by the ShangDan fault zone into northern and southern plates. Northward subduction initiated from the beginning of the palaeozoic and then was followed by arc-continental collision during the Hercynian-Indosinian periods. The Carboniferous was just the important stage of transition from subduction to collision, and the detailed tectonic and sedimentary processes were recorded by the Carboniferous strata developed in the frontal margin of subduction plate. The southern-zo...
Based on the investigation to tree roots on seawall and tests on soil antieroding and anti-watering as well as soil seeping characteristics,the paper presentS some research results as follows (A)Tree roots have a great soil holding ability and can increase soil conservation capability the index ofsoil anti-erosion and soil anti-scouring will increase with the increase of tree root quantity,especilly,of the thinner roots thinner than 1 mm in diameter.(B)Tree roots on seawall has special distributivecharacter...
水平伸展
horizontal extension
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