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Early and Middle Jurassic tectonically controlled deposition in the High-Tatric succession (Tatricum), Tatra Mountains, southern Poland: a review
Geological Quarterly ( IF 1 ) Pub Date : 2021-04-08 , DOI: 10.7306/gq.1583
Piotr ŁUCZYŃSKI

The High-Tatric succession of the Tatra Mountains represents the Tatricum domain of the Central Western Carpathians, which in the Jurassic was located on the southern margin of the incipient and expanding Vahic Ocean – a branch of Western Tethys. This paper describes the various depositional consequences of extensional tectonic activity as it impacted on sedimentation in the High-Tatric succession of the Tatra Mountains during the Early and Middle Jurassic. Evidence of such impacts on depositional style and facies development are present within the Dudziniec, Smolegowa and Krupianka formations, in all the High-Tatric tectonic units. These impacts also include erosional surfaces and sedimentary gaps separating particular formations, commonly associated with minor angular unconformities. The Lower Jurassic, pre-Bajocian, Dudziniec Formation of the Kominy Tylkowe (autochthonous) Unit is developed in mixed carbonate-clastic facies. The occurrence and proportion of sand-dominated and carbonate-dominated facies, as well as their thickness differences, were controlled by syndepositional tilt-block tectonics, taking place both in depositional and in neighbouring source areas. The Smolegowa and Krupianka formations (Bajocian–Bathonian) occur in all High-Tatric tectonic units, but in the Czerwone Wierchy and Giewont units they are represented mainly by laterally discontinuous bodies of crinoidal limestone of very limited thickness. The preservation of these deposits only in some areas, as well as their thickness reductions, are effects of differentiated subsidence and uplift of isolated blocks taking place in an extensional regime. Moreover, the Krupianka Formation abounds in condensed facies with ferruginous crusts and stromatolites – a feature characteristic of rapidly drowning ocean margins. Deposits of the Dudziniec, Smolegowa and Krupianka formations are also preserved as infills of extensive systems of neptunian dykes penetrating mainly the Triassic substrate, which is yet another classic symptom of synsedimentary extension. The dominant influence of tectonics on sedimentary development ceased with the onset of deposition of the Raptawicka Turnia Formation in the Callovian.



中文翻译:

波兰南部塔特拉山的高陆演演替(Tatricum)中的早侏罗世和中侏罗世构造控制的沉积:综述

塔特拉山脉的高塔克拉系列代表了中西部喀尔巴阡山脉的塔特克拉姆地区,该地区在侏罗纪位于始发且不断扩张的瓦希奇海(西特提斯的一个分支)的南部边缘。本文描述了侏罗纪早期和中期侏罗纪伸展构造活动对塔特拉山高Tatric演替中的沉积的各种沉积后果。在所有高塔特拉构造单元的Dudziniec,Smolegowa和Krupianka地层中都存在这种对沉积方式和相发育的影响的证据。这些影响还包括侵蚀表面和沉积缝隙,这些缝隙和沉积缝隙将特定的地层分开,通常与较小的角度不整合有关。下侏罗纪,前巴乔时期,Kominy Tylkowe(土生)单元的Dudziniec地层是在碳酸盐-碎屑混合相中发育的。砂质相和碳酸盐质相的发生和比例,以及它们的厚度差异,是由沉积和邻近源区的同沉积倾斜块构造控制的。Smolegowa和Krupianka地层(Bajocian–Bathonian)都出现在所有高塔特构造单元中,但是在Czerwone Wierchy和Giewont单元中,它们主要由厚度非常有限的海百合形灰岩的横向不连续体所代表。这些沉积物仅在某些区域中得以保存以及厚度减小,这是在扩张状态下差异沉降和孤立块抬升的结果。而且,Krupianka组在凝结相中富含铁质地壳和叠层石,这是海洋边缘迅速淹没的特征。还保留了Dudziniec,Smolegowa和Krupianka地层的沉积物,作为大量海王星岩脉系统的填充物,这些系统主要穿透三叠纪基底,这是同义沉积的又一典型症状。构造学对沉积发育的主要影响随着卡拉托维奇Raptawicka Turnia组开始沉积而停止。这是同业扩展的另一种典型症状。构造学对沉积发育的主要影响随着卡拉托维奇Raptawicka Turnia组开始沉积而停止。这是同业扩展的另一种典型症状。构造学对沉积发育的主要影响随着卡拉托维奇Raptawicka Turnia组开始沉积而停止。

更新日期:2021-04-15
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