Relationship of petrographic and mineralogical characteristics with mechanical strength properties of granitic rocks: a case study from the Biga Peninsula, NW Turkey

IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI:10.55730/1300-0985.1831
Güven Eroğlu, Ayten Çalık
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引用次数: 3

Abstract

: This study was carried out on granitic rocks from the Biga Peninsula in order to investigate petrographic, and mineralogical properties in comparison with mechanical strength properties. This study was conducted in four different locations where granitic rocks outcrop from north to south in the Biga Peninsula: Lapseki (Şevketiye granite), Ezine (Kestanbol granite), Bayramiç (Yassıbağ granite), and Edremit (Eybek granite). Field observations and detailed petrographic studies of representative samples indicate that they are quartz monzodiorite (Şevketiye and Yassıbağ), quartz monzonite (Kestanbol), and granodiorite (Eybek) in composition. All the rocks have similar mineral composition, comprising mainly feldspar (plagioclase–alkali feldspar), quartz, mafic minerals (biotite and amphibole), accessory minerals (sphene, zircon, opaque minerals), and secondary minerals (sericite, epidote, chlorite) with differences in the percentage of modal mineralogy, textural details, and weathering. Physical and mechanical properties were also defined in this study, these include water absorption, porosity, uniaxial compressive strength (UCS), tensile strength (TS), Schmidt hardness tests (SHT), Los Angeles test (LA), and frost resistance test (FRT) with sodium sulfate (Na 2 SO 4 ). The results of strength tests show that the Şevketiye granite had the lowest strength values with the highest values for Los Angeles abrasion, frost resistance, water absorption, and porosity. The Eybek granite exhibited the highest value for strength, with the lowest values for Los Angeles abrasion, frost resistance, water absorption, and porosity. A comparison of the petrographic properties of all studied rocks with their respective strengths show that modal mineralogy, degree of alteration, and texture influence the strength of the rocks. Additionally, an increasing propensity for UCS and TS values was found with increasing SHT values. The LA abrasion values and the FRT values were found to increase with decreasing Schmidt hardness test values for the tested samples. The found results of this study could help in the application of these rocks as row material.
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花岗岩岩相矿物学特征与岩石力学强度的关系——以土耳其西北部比加半岛为例
:这项研究是在比加半岛的花岗岩上进行的,目的是研究岩相和矿物学特性与机械强度特性的比较。这项研究在比加半岛从北到南的四个不同位置进行:Lapseki(Şevketiye花岗岩)、Ezine(Kestanbol花岗岩)、Bayramiç(Yassıbağ花岗岩)和Edremi(Eybek花岗岩)。现场观察和对代表性样品的详细岩相研究表明,它们的成分为石英二长闪长岩(Şevketiye和Yassıbağ)、石英二长岩(Kestanbol)和花岗闪长岩。所有岩石的矿物成分相似,主要包括长石(斜长石-碱性长石)、石英、镁铁质矿物(黑云母和角闪石)、副矿物(sphene、锆石、不透明矿物)和次生矿物(绢云母、绿帘石、绿泥石),但模式矿物学、结构细节和风化作用的百分比不同。本研究还定义了物理和机械性能,包括吸水性、孔隙率、单轴抗压强度(UCS)、拉伸强度(TS)、施密特硬度试验(SHT)、洛杉矶试验(LA)和硫酸钠(Na2SO4)的抗冻性试验(FRT)。强度测试结果表明,Şevketiye花岗岩的强度值最低,洛杉矶耐磨性、抗冻性、吸水性和孔隙率最高。Eybek花岗岩的强度值最高,洛杉矶耐磨性、抗冻性、吸水性和孔隙率值最低。所有研究岩石的岩相特性与其各自强度的比较表明,模式矿物学、蚀变程度和纹理会影响岩石的强度。此外,随着SHT值的增加,UCS和TS值有增加的趋势。发现测试样品的LA磨损值和FRT值随着施密特硬度测试值的降低而增加。这项研究的发现可能有助于将这些岩石用作排料。
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来源期刊
Turkish Journal of Earth Sciences
Turkish Journal of Earth Sciences 地学-地球科学综合
CiteScore
2.40
自引率
10.00%
发文量
6
审稿时长
6 months
期刊介绍: The Turkish Journal of Earth Sciences is published electronically 6 times a year by the Scientific and Technological Research Council of Turkey (TÜBİTAK). It is an international English-language journal for the publication of significant original recent research in a wide spectrum of topics in the earth sciences, such as geology, structural geology, tectonics, sedimentology, geochemistry, geochronology, paleontology, igneous and metamorphic petrology, mineralogy, biostratigraphy, geophysics, geomorphology, paleoecology and oceanography, and mineral deposits. Contribution is open to researchers of all nationalities.
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