火星皱纹脊的形态和运动学相关性:特里谢尔建模的启示

IF 2.5 2区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Icarus Pub Date : 2024-09-21 DOI:10.1016/j.icarus.2024.116330
F. Carboni, O. Karagoz, T. Kenkmann
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引用次数: 0

摘要

皱褶脊是陆地行星上最常见也是最有争议的压缩构造结构之一。虽然它们的起源被很好地推断为与压缩应力驱动的地壳缩短有关,但它们的地下特征仍然是一个有争议的问题。关于促进皱纹脊的断层的几何形状、数量、结构风格和运动学,仍有许多问题有待解决。我们采用特里舍尔(Trishear)和断层-平行流(Fault-Parallel-Flow)综合前向运动学模型来模拟与皱脊有关的断层。这是通过一系列平衡截面和随之产生的一组狭窄三维模型来实现的。我们对 9 条皱脊进行了详细的运动学分析:其中 6 条位于 Lunae Planum 和 Solis Planum 的环塔西斯地区,另外 3 条分别位于 Hellas Planitia、Hesperia Planum 和 Syrtis Major Planum。应用该方法,我们可以对皱脊的几何形状和运动学进行定量评估,并将它们与形态测量参数(即宽度和起伏)联系起来。我们的研究结果表明,皱脊构造的特点是断层阵列比以前的模型更为复杂。这导致水平缩短的总量因断层的数量和类型(即主断层、反推断层、合成断层)的不同而不同。模拟断层的位置和几何形状表明,在不同深度存在多个脱离层,且具有不同的力学行为,如摩擦力较弱和摩擦力较大的脱离层,这些脱离层很可能存在于沉积夹层中。缩短量、断层几何形状和间距以及上断层尖端深度与皱脊地形的主要形态参数呈正相关。
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Morphometry and kinematics correlation of wrinkle ridges on Mars: Insights from Trishear modelling
Wrinkle ridges are among the most common and controversial compressional tectonic structures on terrestrial planets. While their origins are well inferred to be related to crustal shortening driven by compressional stress, their subsurface characterization is still a matter of debate. Open questions remain about the geometry, number, structural style and kinematics of faults promoting wrinkle ridges. We use the Trishear and Fault-Parallel-Flow integrated forward kinematic modelling to model wrinkle ridges related faults. This is achieved through a series of balanced cross sections and a consequent set of narrow 3D models. We perform a detail kinematic analysis on nine wrinkle ridges: six are located in the circum-Tharsis regions of Lunae Planum and Solis Planum, while three are located in the Hellas Planitia, Hesperia Planum and Syrtis Major Planum, respectively. The applied methodology allows us to quantitatively assess wrinkle ridges geometry and kinematics, and to correlate them with morphometric parameters (i.e., width and relief). Our results indicate how wrinkle ridges tectonics can be characterized by a more complex array of faults than previously modelled. This leads to a total amount of horizontal shortening accommodated differently depending on the number and type of faults (i.e., main fault, backthrust, synthetic faults). The location and geometry of the modelled faults suggest the presence of multiple detachments at different depths and with different mechanical behaviors such as weaker and more frictional décollements, which are likely found within sedimentary interlayers. The amount of shortening, the fault geometry and spacing, as well as the upper faults tips depth are positively correlated with major morphometric parameters of wrinkle ridges topography.
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来源期刊
Icarus
Icarus 地学天文-天文与天体物理
CiteScore
6.30
自引率
18.80%
发文量
356
审稿时长
2-4 weeks
期刊介绍: Icarus is devoted to the publication of original contributions in the field of Solar System studies. Manuscripts reporting the results of new research - observational, experimental, or theoretical - concerning the astronomy, geology, meteorology, physics, chemistry, biology, and other scientific aspects of our Solar System or extrasolar systems are welcome. The journal generally does not publish papers devoted exclusively to the Sun, the Earth, celestial mechanics, meteoritics, or astrophysics. Icarus does not publish papers that provide "improved" versions of Bode''s law, or other numerical relations, without a sound physical basis. Icarus does not publish meeting announcements or general notices. Reviews, historical papers, and manuscripts describing spacecraft instrumentation may be considered, but only with prior approval of the editor. An entire issue of the journal is occasionally devoted to a single subject, usually arising from a conference on the same topic. The language of publication is English. American or British usage is accepted, but not a mixture of these.
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