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Petrographical and mineralogical study of detrital strata near and within the Ballık travertine deposit (SW Turkey): architecture of a mixed clastic–carbonate succession
International Journal of Earth Sciences ( IF 1.8 ) Pub Date : 2021-03-29 , DOI: 10.1007/s00531-021-02006-y
Michaël Verbiest , Jeroen Soete , Ophélie Fay-Gomord , Rieko Adriaens , Cihan Aratman , Rudy Swennen

The Ballık area (SW Turkey) was studied as a mixed clastic–continental carbonate reservoir analogue, in which kilometre wide and up to 70-m-thick tufa and travertine lithologies are found in an envelope of detrital sediments, which locally strongly interfinger with these porous carbonates. Former studies focussed on the carbonate lithologies, since they are considered as pre-salt analogues. This study aims to describe the adjacent non-carbonate lithologies, unravel their depositional setting, and address their influence on the overall sedimentary architecture. This study relies on an extensive field campaign, during which 142 samples of all different detrital lithologies were collected. Optical, fluorescence, cathodoluminescence, and Scanning Electron Microscopy (SEM) yielded important insights in the petrography of these lithologies, based on which 5 main lithologies were differentiated: i.e., (1) laminated marls, (2) polygenetic conglomerates, (3) massive marls, (4) tabular sandstones, and (5) coquina accumulations. These were interpreted to represent three different sedimentary facies corresponding to lacustrine, fluvial, and shoreline facies. The (clay) mineralogy of lacustrine sediments was extensively studied by bulk and clay-specific XRD. In this respect, special emphasis was laid on the depositional setting of the lacustrine facies, in which both authigenic palygorskite and poorly ordered dolomite were identified. Petrophysical properties of 16 plugs were determined by He porosimetry and N2-permeability, indicating that the detrital sediments are characterised by poor reservoir properties. The latter causes them to act, after assumed burial compaction, as potential barriers within a continental carbonate reservoir system.



中文翻译:

Ballık钙华矿床附近和内部的碎屑岩层的岩石学和矿物学研究(土耳其西南部):碎屑-碳酸盐混合演替的构造

Ballık地区(西南土耳其)被研究为碎屑-陆相碳酸盐岩混合储层,在碎屑沉积物的包裹层中发现了千米宽,厚达70米的石灰岩和钙华岩性,它们在局部与这些沉积物形成强烈的相互指涉。多孔碳酸盐。以前的研究集中在碳酸盐岩岩性上,因为它们被认为是预盐类似物。这项研究旨在描述相邻的非碳酸盐岩性,揭示其沉积环境,并探讨其对整体沉积构造的影响。这项研究依赖于广泛的野外活动,在此期间收集了142种所有不同碎屑岩性的样品。光学,荧光,阴极发光和扫描电子显微镜(SEM)在这些岩性的岩石学中产生了重要的见识,根据这5种主要岩性进行了区分:(1)层状泥灰岩,(2)多成岩砾岩,(3)块状泥灰岩,(4)板状砂岩和(5)钴金属矿堆积。这些被解释为代表与湖相,河流相和海岸线相对应的三种不同的沉积相。湖面沉积物的(粘土)矿物学已被大量和特定于粘土的XRD进行了广泛研究。在这方面,特别强调了湖相的沉积环境,在其中识别了自生的坡缕石和不良​​有序的白云石。用He孔隙率法和N2渗透率测定了16个岩塞的岩石物理性质,表明该碎屑沉积物的特征是储层性质较差。后者导致他们在埋葬被压实后采取行动,

更新日期:2021-03-30
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