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Journal articles on the topic 'Rocks, Carbonate'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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1

Yaxley, Gregory M., Bruce A. Kjarsgaard, and A. Lynton Jaques. "Evolution of Carbonatite Magmas in the Upper Mantle and Crust." Elements 17, no. 5 (October 1, 2021): 315–20. http://dx.doi.org/10.2138/gselements.17.5.315.

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Carbonatites are the most silica-poor magmas known and are amongst Earth’s most enigmatic igneous rocks. They crystallise to rocks dominated by the carbonate minerals calcite and dolomite. We review models for carbonatite petrogenesis, including direct partial melting of mantle lithologies, exsolution from silica-undersaturated alkali silicate melts, or direct fractionation of carbonated silicate melts to carbonate-rich residual melts. We also briefly discuss carbonatite–mantle wall-rock reactions and other processes at mid-to upper crustal depths, including fenitisation, overprinting by carbo

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2

Korinevsky, V. G., and E. V. Korinevsky. "Isotopic evidences of magmatic nature of the dolomite-calcite bodies of the Ilmeny Mountains and the Plastovsky district of the South Urals." Vestnik of Geosciences 11 (2020): 3–19. http://dx.doi.org/10.19110/geov.2020.11.1.

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The data obtained for the first time on the isotopic composition of oxygen and carbon of calcites and graphites of dolomitecalcite rocks of the Ilmeny Mountains and dykes of a similar composition in the Plastovsky district have confirmed their magmatic genesis. The temperature of formation of carbonate bodies (590—1000 °Ñ), determined from the isotopic ratios of C and O in calcite and graphite, corresponds to the temperature range (600—900 °Ñ) of the formation of carbonatite associations. According to the same ratios of isotopes in calcites, the protoliths of carbonate rocks are located within

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Bishop, Janice L., Rachel T. Schelble, Christopher P. McKay, Adrian J. Brown, and Kaysea A. Perry. "Carbonate rocks in the Mojave Desert as an analogue for Martian carbonates." International Journal of Astrobiology 10, no. 4 (July 1, 2011): 349–58. http://dx.doi.org/10.1017/s1473550411000206.

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AbstractCarbonate rocks in the Mojave Desert are presented as potential analogues for the carbonates on Mars. Rocks collected from the Little Red Hill site contain iron oxide-bearing coatings that greatly suppress the spectral features due to carbonate of the underlying material and impart a spectral slope. The Mojave Desert was formerly a lush pedogenic soil environment that, over time, transformed into the current arid climate with abundant rock varnish. One niche for microbes in the current desolate environment is inside and underneath the rocks where the microbes profit from solar protecti

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4

Arman, Hasan, Mahmoud Abu Saima, Osman Abdelghany, and Safwan Paramban. "Comparative Study on Degradability Characteristics of Evaporitic and Carbonate Rocks from Al Ain, United Arab Emirates." IOP Conference Series: Earth and Environmental Science 906, no. 1 (November 1, 2021): 012130. http://dx.doi.org/10.1088/1755-1315/906/1/012130.

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Abstract The slake durability index (SDI) test is a well know and extensively used to measure the degradability behaviour of rocks especially for weak rocks like mudstone, shale, evaporites, carbonates, etc. The degradability of rocks plays a critical role in engineering design process either on or in the rock mass for safe and sustainable structures. Evaporitic and carbonate rocks are vulnerable to physical, chemical and mechanical weathering, break down, as result of wetting-drying processes during the SDI test. Evaporites and carbonates are outcropped at the surface and subsurface of the Al

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5

Nikiforov, Anatoly V., Elena O. Dubinina, Nikolay A. Polyakov, Amina M. Sugorakova, and Aylan K. Khertek. "Influence of Host Marble Rocks on the Formation of Intrusive Alkaline Rocks and Carbonatites of Sangilen (E. Siberia, Russia)." Minerals 11, no. 7 (June 22, 2021): 666. http://dx.doi.org/10.3390/min11070666.

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The study of the O and C isotope composition of calcite from nepheline syenites, ijolites and carbonatites of the Chik intrusion and the intrusions of the Erzin–Tarbagatay group of Sangilen (Eastern Siberia, Russia) showed derivation from alkaline melts enriched with a carbonate component from the host marbleized sedimentary rocks. The calculations showed that about 40% of the initial mass of carbonates involved in the interaction with silicate melts have remained after decarbonation. During the assimilation of the carbonate, an oxygen isotope exchange took place between the residual carbonate

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Adam, Ludmila, Michael Batzle, and Ivar Brevik. "Gassmann's fluid substitution and shear modulus variability in carbonates at laboratory seismic and ultrasonic frequencies." GEOPHYSICS 71, no. 6 (November 2006): F173—F183. http://dx.doi.org/10.1190/1.2358494.

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Carbonates have become important targets for rock property research in recent years because they represent many of the major oil and gas reservoirs in the world. Some are undergoing enhanced oil recovery. Most laboratory studies to understand fluid and pressure effects on reservoir rocks have been performed on sandstones, but applying relations developed for sandstones to carbonates is problematic, at best. We measure in the laboratory nine carbonate samples from the same reservoir at seismic (3–3000 Hz) and ultrasonic [Formula: see text] frequencies. Samples are measured dry (humidified) and

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7

Chen, Jun-Qing, Xiong-Qi Pang, Song Wu, Zhuo-Heng Chen, Mei-Ling Hu, Luo-Fu Liu, Kui-You Ma, Bo Pang, and Zhi-Peng Huo. "Method for identifying effective carbonate source rocks: a case study from Middle–Upper Ordovician in Tarim Basin, China." Petroleum Science 17, no. 6 (September 19, 2020): 1491–511. http://dx.doi.org/10.1007/s12182-020-00489-z.

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AbstractHydrocarbon expulsion occurs only when pore fluid pressure due to hydrocarbon generation in source rock exceeds the force against migration in the adjacent carrier beds. Taking the Middle–Upper Ordovician carbonate source rock of Tarim Basin in China as an example, this paper proposes a method that identifies effective carbonate source rock based on the principles of mass balance. Data from the Well YW2 indicate that the Middle Ordovician Yijianfang Formation contains effective carbonate source rocks with low present-day TOC. Geological and geochemical analysis suggests that the hydroc

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8

Xu, Hengchao, Xiaotong Peng, Shun Chen, Jiwei Li, Shamik Dasgupta, Kaiwen Ta, and Mengran Du. "Macrofaunal burrowing enhances deep-sea carbonate lithification on the Southwest Indian Ridge." Biogeosciences 15, no. 21 (October 30, 2018): 6387–97. http://dx.doi.org/10.5194/bg-15-6387-2018.

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Abstract. Deep-sea carbonates represent an important type of sedimentary rock due to their effect on the composition of the upper oceanic crust and their contribution to deep-sea geochemical cycles. However, the role of deep-sea macrofauna in carbonate lithification remains poorly understood. A large lithified carbonate area, characterized by thriving benthic faunas and a tremendous amount of burrows, was discovered in 2008, blanketing the seafloor of the ultraslowly spreading Southwest Indian Ridge (SWIR). Benthic inhabitants – including echinoids, polychaetes, gastropods and crustaceans – ar

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9

Kuang, Hong Hai. "Pattern Recognition of Carbonate Rocks in Rs Image." Key Engineering Materials 500 (January 2012): 37–39. http://dx.doi.org/10.4028/www.scientific.net/kem.500.37.

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Pattern recognition of carbonate rocks in RS image have been studied in the paper. Samples of carbonate rocks were scanned into rock images.By analysing these samples of carbonate rocks,a new arithmetic was chosed and a standard curve of carbonate rocks by the arithmetic can be gotten.Rs images were divided into grids.There are curves by the arithmetic in grids. The standard curve of carbonate rocks and curves in grids were compared.If both of curves look very similar,the grid is carbonate rocks area.

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Ehlmann, Bethany L., John F. Mustard, Scott L. Murchie, Francois Poulet, Janice L. Bishop, Adrian J. Brown, Wendy M. Calvin, et al. "Orbital Identification of Carbonate-Bearing Rocks on Mars." Science 322, no. 5909 (December 19, 2008): 1828–32. http://dx.doi.org/10.1126/science.1164759.

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Geochemical models for Mars predict carbonate formation during aqueous alteration. Carbonate-bearing rocks had not previously been detected on Mars' surface, but Mars Reconnaissance Orbiter mapping reveals a regional rock layer with near-infrared spectral characteristics that are consistent with the presence of magnesium carbonate in the Nili Fossae region. The carbonate is closely associated with both phyllosilicate-bearing and olivine-rich rock units and probably formed during the Noachian or early Hesperian era from the alteration of olivine by either hydrothermal fluids or near-surface wat

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11

Aderhold, M., C. Disselkamp, R. Formanski, M. Grimberg, A. M. Grineisen, L. M. Kroenert, M. S. Ogan, et al. "Comparison of different methods to characterise the abrasivity potential and mechanical properties of carbonates with respect to its relevance for practical purposes in excavation technologies." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (January 1, 2023): 012044. http://dx.doi.org/10.1088/1755-1315/1124/1/012044.

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Abstract The characterisation of the abrasivity potential of carbonates plays an important role for drilling-based excavation technologies, for example in tunneling or geothermal exploration. Although carbonates are known to have a rather low abrasivity, they have been associated with severe excavation performance reductions. We compared different methods to characterise the abrasivity potential of carbonates with respect to its applicability for practical purposes in excavation technologies. In this study, seven carbonate rocks were investigated which differ with respect to their microstructu

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12

Yin, Gongming, Chunru Liu, Renmao Yuan, Fei Han, Rui Ding, and Jean-Jacques Bahain. "ESR Chronology of Bedrock Fault Activity in Carbonate Area: Preliminary Results from the Study of the Lijiang-Xiaojinhe Fault, Southeastern Tibet, China." Geochronometria 48, no. 1 (January 1, 2021): 215–21. http://dx.doi.org/10.2478/geochr-2020-0033.

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Abstract Carbonated rocks constitute one of the main lithologies of the southeastern Tibet area, China, a tectonically very active zone. However, due to the lack of suitable dating materials, it is difficult to carry out chronological studies of the local tectonic evolution in such carbonate areas. In the present study, electron spin resonance (ESR) method had been applied on the dating of carbonates heated during fault activity of the Lijiang-Xiaojinhe (LX) Fault, an important active fault located in the northwest of Yunnan Province. Clear displaced landforms show that the fault has undergone

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13

Shan, Zhi Gang, Hong Hai Kuang, Ming Sheng Kuang, and Chun Hong Zhou. "Porous Materials of Carbonate Rocks under the Condition of Low Temperature and High Pressure." Key Engineering Materials 500 (January 2012): 34–36. http://dx.doi.org/10.4028/www.scientific.net/kem.500.34.

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There are significant impacts on the safty of tunnels because of porous materials.In order to avoid serious accidents of tunnels, Porous materials of carbonate rocks under the condition of low temperature and high pressure have been studied in the paper. Samples of local carbonate rocks have been collected from carbonate rock formation. Special machine was designed to simulate the condition of low temperature (10°C-20°C ) and high pressure (1-30Mpa) undergroud 4000M in jinping.Samples of local carbonate rocks have been tested in the machine. Spectrographs and scanners have been used to observe

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14

Mudarisova, Raushania A., Yuri V. Volkov, Nailya M. Khasanova, and Boris V. Uspensky. "Carbonate reservoir rocks characterization of the Kazanian Stage of the Gorsky ultraviscous oil field by electron paramagnetic resonance method." Georesursy 24, no. 2 (September 30, 2022): 90–98. http://dx.doi.org/10.18599/grs.2022.3.8.

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The use of the electron paramagnetic resonance (EPR) method for studying carbonate rocks is widespread. EPR makes it possible to reconstruct lithological and geochemical environments of ancient sedimentation, including redox conditions and paleo-radioactivity of sedimentation basins. The paper considers the heterogeneous structure of carbonate reservoir rocks of the Kazanian Stage of the Gorsky ultraviscous oil field by paramagnetic marks: manganese ions Mn2+, radical ions SO3–, SO2–, РO22-(РO20) in carbonate minerals and radical С600 in the remains of organic matter in the rock. The carbonate

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15

Dubinina, E. O., L. G. Filimonova та S. A. Kossova. "Isotopic (δ34s, δ13c, δ18o) properties of the disseminated mineralization of plutonic rocks in the Dukat ore field (Northeast of Russia)". Геология рудных месторождений 61, № 1 (15 січня 2019): 39–51. http://dx.doi.org/10.31857/s0016-777061139-51.

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The variations in the δ34S, δ13C, and δ18O values of the disseminated sulfides and carbonate phase, which occurred in trace amounts in the plutonic rocks controlling the position of the unique Dukat Au-Ag field (Northeast of Russia), were examined. These properties were compared with similar isotopic parameters of the ore associations in the field. The δ34S values of sulfides and jarosite obtained from plutonic rocks were in a relatively narrow range (from -3.4 to +3.6‰) when compared with the range of variation of the δ34S values of sulfides obtained from the ore bodies (from 4.5 to +2.0 ‰).

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16

Mousavi, Maryam, Maša Prodanovic, and David Jacobi. "New Classification of Carbonate Rocks for Process-Based Pore-Scale Modeling." SPE Journal 18, no. 02 (December 14, 2012): 243–63. http://dx.doi.org/10.2118/163073-pa.

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Summary Carbonate rocks are complex in structure and pore geometry and display heterogeneity on all length scales. In this paper, carbonate rocks are described on the basis of their contents and pore geometry for use in pore-scale modeling. Definitions of grains and porosities are based on other carbonate-rock classifications; we did not invent new concepts. On the basis of carbonate content (grain, mud, and cement), carbonate rocks were divided into three types: muddy, grainy, and mixed. Each type was divided into subtypes on the basis of pore geometries defined by other researchers. Pore-siz

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17

Harbar, Vladyslav, and Andriy Lisovskiy. "Carbonations and carbonate profile forming processes of rendzinas of the Podilski Tovtry." Visnyk of the Lviv University. Series Geography, no. 51 (December 27, 2017): 88–97. http://dx.doi.org/10.30970/vgg.2017.51.8741.

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The peculiarities of content and profile distribution of carbonates in rendzinas and soil-forming rocks of the Podilski Tovtry are investigated. It has been determined that the predominant process of weathering of carbonate rocks is a chemical dissolution, in which carbonates are converted into bicarbonates and, in the case of washing water regime, are applied from the soil (the process of decarbonization) and mechanical grinding and destruction of the remaining carbonate inclusions in the process of soil cultivation. The dissolution of carbonate rocks causes accumulation in the soil profile o

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18

Zhang, Tong. "Geological and geochemical characteristics and genesis of carbonate rocks in a certain area." E3S Web of Conferences 358 (2022): 02034. http://dx.doi.org/10.1051/e3sconf/202235802034.

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Carbonate rock is a general term for the rock composed of carbonate minerals, which is mainly composed of carbonate sediments, with calcite (limestone) and dolomite (dolomite) as the main forms. Carbonate rocks are important oil storage rocks, storing more than half of the world's natural gas and oil, and co-existing with various types of solid sedimentary deposits. They are themselves a kind of mineral that can be used in construction, chemical industry, metallurgy and other processes, so they have very important economic value. This paper analyzes the geological and geochemical characteristi

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Banerjee, Amlan, Sarbani Patranabis-Deb, Dilip Saha, and M. Santosh. "Inorganic silicification of ancient carbonate rocks." Journal of Sedimentary Research 91, no. 2 (February 28, 2021): 186–96. http://dx.doi.org/10.2110/jsr.2020.099.

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ABSTRACT Mechanisms of inorganic silicification of early Precambrian (older than 750 Ma) carbonate rocks remain equivocal. A quantitative model is presented here that captures the essence of ancient inorganic silicification of the carbonate rocks and is based on the hypotheses that carbonate silicification, a volume-conservative replacive process, is driven by crystallization stress induced by the growth of the guest mineral. Results of the quantitative model for silicification of calcitic limestone and dolostone are compared and validated against available independent observations and are fou

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Verwer, Klaas, Hendrik Braaksma, and Jeroen A. Kenter. "Acoustic properties of carbonates: Effects of rock texture and implications for fluid substitution." GEOPHYSICS 73, no. 2 (March 2008): B51—B65. http://dx.doi.org/10.1190/1.2831935.

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More than 250 plugs from outcrops and three nearby boreholes in an undisturbed reef of Miocene (Tortonian) age were quantitatively analyzed for texture, mineralogy, and acoustic properties. We measured the P- and S-waves of carbonate rocks under dry (humidified) and brine-saturated conditions at [Formula: see text] effective pressure with an ultrasonic pulse transmission technique [Formula: see text]. The data set was compared with an extensive database of petrophysical measurements of a variety of rock types encountered in carbonate sedimentary sequences. Two major textural groups were distin

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Saberi, Mohammad Reza. "Fluid detection in carbonate rocks by integrating well logs and seismic attributes." Interpretation 8, no. 1 (February 1, 2020): SA1—SA10. http://dx.doi.org/10.1190/int-2019-0054.1.

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Prestack seismic attributes are efficient tools for hydrocarbon exploration and pore fluid detection with the help of various techniques, such as amplitude variation with offset analysis. Such studies focus mainly on siliciclastics rather than carbonates because detection of fluid effects in carbonate rocks can be masked by their complex pore structure and heterogeneity. Current fluid detection methods from seismic attributes usually rely on a linear background model for P- and S-wave velocities of the water-saturated rocks, and any deviation from this trend is assigned to possible pore fluid

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Larson, Erik B., and Ronald V. Emmons. "Dissolution of Carbonate Rocks in a Laboratory Setting: Rates and Textures." Minerals 11, no. 6 (June 5, 2021): 605. http://dx.doi.org/10.3390/min11060605.

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Determining the dissolution rates of carbonate rocks is vital to advancing our understanding of cave, karst, and landscape processes. Furthermore, the role of carbonate dissolution is important for the global carbon budget and climate change. A laboratory experiment was setup to calculate the dissolution rates of two whole rock carbonate samples with different petrographic makeup (ooids and brachiopods). The carbonate rock samples were also explored under a scanning electron microscope to evaluate the textures that developed after dissolution The oolitic limestone dissolved at a rate of 1579 c

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Winarno, Tri, Jenian Marin, Ilham Hani Pratama, and Anis Kurniasih. "The analysis of volcanic activity influences at the lower and middle part of Sentolo Formation, Kulon Progo using petrographic method." MATEC Web of Conferences 159 (2018): 01040. http://dx.doi.org/10.1051/matecconf/201815901040.

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The research area is a part of South Serayu Mountain zone, specifically Bregada Kulon Progo. The Bregada Kulon Progo is a product of volcanic activity in the past, which can be seen by the volcanic rock called Old Andesite Formation. The end of the volcanic activity is characterized by the deposition of carbonate rocks which were part of Jonggrangan Formation and Sentolo Formation. The lower part of Sentolo Formation is composed by the mix of carbonate and volcanic materials. The research is carried out by two methods. The first is field method, which is implemented by geological mapping and r

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24

Safira, Amanda, Dina Yulianita, and Widya Utama. "Fluid Substitution Analysis Using Gassmann’s Equation Modification on Carbonate Environment." Pakistan Journal of Scientific Research 1, no. 2 (December 30, 2021): 8–12. http://dx.doi.org/10.57041/pjosr.v1i2.6.

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Gassmann’s equation can be used to determine the velocity of compressional waves that pass through rocks with various pore fluid contents, using fluid substitution concept, but is generally applied to certain conditions only (physical rock properties). Carbonate rock has properties in contrary of Gassmann’s assumption; is a heterogenic, anisotropic rock and does not have a well-interconnected pores. In this research, secondary data from laboratory measurements are used, consisting of carbonate rocks (limestone and dolomite) to test modified Gassmann’s equation on carbonate rocks. Two approache

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25

Winkler, Erhard M. "Cleaning Carbonate Rocks." APT Bulletin 19, no. 4 (1987): 2. http://dx.doi.org/10.2307/1494140.

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Arthur, Michael A. "Carbonate rocks deconstructed." Nature 460, no. 7256 (August 2009): 698–99. http://dx.doi.org/10.1038/460698a.

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Ghosh, Ranjana, and Mrinal K. Sen. "Predicting subsurface CO2 movement: From laboratory to field scale." GEOPHYSICS 77, no. 3 (May 1, 2012): M27—M37. http://dx.doi.org/10.1190/geo2011-0224.1.

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Finding an appropriate model for time-lapse seismic monitoring of [Formula: see text]-sequestered carbonate reservoir poses a great challenge because carbonate-rocks have varying textures and highly reactive rock-fluid system. We introduced a frequency-dependent model based on Eshelby’s inclusion and differential effective medium (DEM) theory that can account for heterogeneity in microstructure of rocks and squirt flow. We showed that the estimated velocities from the modified DEM theory match well with the laboratory measurements (ultrasonic) of velocities of carbonate rocks saturated with [F

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28

Ali, Salahalddin Saeed. "Geotechnical Properties of Certain Iraqi Carbonate Rocks." Journal of Zankoy Sulaimani - Part A 4, no. 1 (September 23, 2000): 69–85. http://dx.doi.org/10.17656/jzs.10066.

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29

Castro, Dayse Daltro de, and Paula Lucia Ferrucio da Rocha. "QUANTITATIVE PARAMETERS OF PORE TYPES IN CARBONATE ROCKS." Revista Brasileira de Geofísica 31, no. 1 (March 1, 2013): 125. http://dx.doi.org/10.22564/rbgf.v31i1.251.

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Carbonate rocks are controlled by variable depositional systems and diagenetic process and have a wide variety of pore and grain shapes/sizes. Those characteristics imprint different petrophysical properties in carbonates, which are more difficult to predict than in siliciclastic rocks. Measurements on carbonates reveal that pore/rock type parameters are function of total porosity and play an important role in the relationship between porosity and P-wave velocity. In this research, thedatabase consists of carbonate rock samples with a wide range of bulk porosities, pore types and rock textures

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Zakaria, A. S. S., H. A. A. Nasr-El-Din, and M. Ziauddin. "Predicting the Performance of the Acid-Stimulation Treatments in Carbonate Reservoirs With Nondestructive Tracer Tests." SPE Journal 20, no. 06 (December 18, 2015): 1238–53. http://dx.doi.org/10.2118/174084-pa.

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Summary Carbonate formations are very complex in their pore structure and exhibit a wide variety of pore classes, such as interparticle porosity, moldic porosity, vuggy porosity, and microporosity. Geologists have defined carbonate pore classes on the basis of sedimentology, thin sections, and porosity/permeability relationships, but the question remains concerning how these pore classes govern the acid flow through porous media. Core samples from six different carbonates, mainly limestone, were selected for the study. The samples were first investigated with thin-section analysis, high-pressu

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Eder, Vika G., Elena A. Kostyreva, Anna Yu Yurchenko, Natalia S. Balushkina, Inga S. Sotnich, Elena V. Kozlova, Alvina G. Zamiraylova, and Natalia I. Savchenko. "New data on lithology, organic geochemistry and accumulation conditions of the Bazhenov formation in Western Siberia." Georesursy 21, no. 2 (May 2019): 129–42. http://dx.doi.org/10.18599/grs.2019.2.129-142.

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This paper presents data on lithological composition, distribution, reservoir properties, geochemistry of organic matter and genesis of carbonate rocks of the Bazhenov formation within the central part of Western Siberia (the region of the Khantei hemianteclise). The following types of carbonates are distinguished: a) primary biogenic – shell rock interlayers and residues of coccolith; b) dia- and catagenetic – in varying degrees, recrystallized rocks with coccoliths, nodules and aporadiolarites; c) catagenetic – cracks healed with calcite in limestone of the foot of the Bazhenov formation. It

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Stennikov, A. V., I. A. Bugaev, A. G. Kalmykov, A. Yu Bychkov, E. V. Kozlova, and G. A. Kalmykov. "Experimental study of gydrotermal production of oil from Domanik Formation rocks." Moscow University Bulletin. Series 4. Geology, no. 6 (December 28, 2017): 64–69. http://dx.doi.org/10.33623/0579-9406-2017-6-64-69.

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The experimental results on the synthetic oil production from Domanik Formation rocks under hydrothermal conditions are given. Oil fractions extracting potential of the rocks under hydrothermal was shown to be up to 60 mg/g or 6,0 wt.%. Inorganic additives (sodium carbonate or silica) incorporation does not influence on the oil recovery factor. Meanwhile the amount of recoverable oil products depends on the mineral composition of the rock. The dependence between the percentage of hydrocarbons emission and mineral composition of the rocks was determined. Clay minerals and silica increase the yi

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Leger, Marie, and Linda Luquot. "Importance of Microstructure in Carbonate Rocks: Laboratory and 3D-Imaging Petrophysical Characterization." Applied Sciences 11, no. 9 (April 22, 2021): 3784. http://dx.doi.org/10.3390/app11093784.

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Carbonate rocks are considered to be essential reservoirs for human development, but are known to be highly heterogeneous and difficult to fully characterize. To better understand carbonate systems, studying pore-scale is needed. For this purpose, three blocks of carbonate rocks (chalk, enthrocal limestone, and dolomite) were cored into 30 samples with diameters of 18 mm and lengths of 25 mm. They were characterized from pore to core scale with laboratory tools. These techniques, coupled with X-ray micro-tomography, enable us to quantify hydrodynamic properties (porosity, permeability), elasti

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Eder, Vika G., Alvina G. Zamiraylova, and Georgii A. Kalmykov. "Evidence of carbonate rocks formation on geochemical barriers in black shale on the example of the Bazhenov formation of the Western Siberia." Georesursy 21, no. 2 (May 2019): 143–52. http://dx.doi.org/10.18599/grs.2019.2.143-152.

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A comprehensive lithological-geochemical study of rocks of the Upper Jurassic-Lower Cretaceous blackshale Bazhenov formation showed that most of its carbonatized interlayers to the boundaries of packs of different composition differing in carbonate content, degree of siliceousness or clayiness. At the same time, at the boundaries of the Bazhenov formation with host sediments, where carbonate rocks are often found in association with “pyrite” low carbon rocks according to geochemical parameters (degree of pyritization, Mn/Al, Ua), a change in the redox regime is recorded. In the most studied st

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Ali Abro, Waheed, Abdul Majeed Shar, Kun Sang Lee, and Asad Ali Narejo. "An integrated analysis of mineralogical and microstructural characteristics and petrophysical properties of carbonate rocks in the lower Indus Basin, Pakistan." Open Geosciences 11, no. 1 (December 31, 2019): 1151–67. http://dx.doi.org/10.1515/geo-2019-0088.

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Abstract Carbonate rocks are believed to be proven hydrocarbon reservoirs and are found in various basins of Pakistan including Lower Indus Basin. The carbonate rock intervals of the Jakkher Group from Paleocene to Oligocene age are distributed in south-western part of Lower Indus Basin of Pakistan. However, there are limited published petrophysical data sets on these carbonate rocks and are essential for field development and risk reduction. To fill this knowledge gap, this study is mainly established to collect the comprehensive high quality data sets on petrophysical properties of carbonate

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Pękala, Agnieszka. "Silification of the Mesozoic Rocks Accompanying the Bełchatów Lignite Deposit, Central Poland." Geosciences 10, no. 4 (April 12, 2020): 141. http://dx.doi.org/10.3390/geosciences10040141.

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Fieldwork and exploratory study of Poland’s Bełchatów lignite deposit reveals that the Jurassic and Cretaceous sediments with overlying Neogene clays include rocks of greater hardness than the primary composition would indicate. Mineralogical and petrographic tests show the impact of secondary mineralization involving silification in particular. Transitional and carbonate rocks observed microscopically and subjected to X-ray examination show numerous polymorphic forms of silica replacing carbonate minerals. Opal types A and CT, chalcedony, quartz and microcrystalline quartz are all present. Th

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Brusnitsyn, A. I., E. V. Starikova, M. V. Ignatova, and V. N. Kuleshov. "The Nadeiyakha Ore occurrence (Pai-Khoi, Russia): an example of ferromanganese metasediments in carbonaceous dolomitic shales." Литология и полезные ископаемые, no. 2 (March 28, 2019): 165–92. http://dx.doi.org/10.31857/s0024-497x20192165-192.

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The paper presents the results of study of metalliferous (ferromanganese and manganese) rocks at the Nadeiyakha ore occurrence (Pai-Khoi) discovered in 2010. The metalliferous deposit represents a stratiform body lying conformably in the Upper Devonian carbonaceous siliceous and clayey–carbonate–siliceous shales. The ore bed occurs 180 m below the regional Famennian manganiferous rock association in Pai-Khoi. Discovery of the Nadeiyakha ore occurrence suggests the existence of an additional age interval of Mn accumulation within the Devonian sequence of this region. The studied metalliferous r

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Wang, Mengqi, Jun Xie, Fajun Guo, Yawei Zhou, Xudong Yang, and Ziang Meng. "Determination of NMR T2 Cutoff and CT Scanning for Pore Structure Evaluation in Mixed Siliciclastic–Carbonate Rocks before and after Acidification." Energies 13, no. 6 (March 13, 2020): 1338. http://dx.doi.org/10.3390/en13061338.

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Nuclear magnetic resonance (NMR) is used widely to characterize petrophysical properties of siliciclastic and carbonate rocks but rarely to study those of mixed siliciclastic–carbonate rocks. In this study, 13 different core samples and eight acidified core samples selected amongst those 13 from the Paleogene Shahejie Formation in Southern Laizhouwan Sag, Bohai Bay Basin, were tested by scanning electron microscopy (SEM), micro-nano-computed tomography (CT), and NMR. SEM and CT results revealed a complex pore structure diversity, pore distribution, and pore-throat connectivity in mixed reservo

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Waqas, Umer, Hafiz Muhammad Awais Rashid, Muhammad Farooq Ahmed, Ali Murtaza Rasool, and Mohamed Ezzat Al-Atroush. "Damage Characteristics of Thermally Deteriorated Carbonate Rocks: A Review." Applied Sciences 12, no. 5 (March 7, 2022): 2752. http://dx.doi.org/10.3390/app12052752.

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This review paper summarizes the recent and past experimental findings to evaluate the damage characteristics of carbonate rocks subjected to thermal treatment (20–1500 °C). The outcomes of published studies show that the degree of thermal damage in the post-heated carbonate rocks is attributed to their rock fabric, microstructural patterns, mineral composition, texture, grain cementations, particle orientations, and grain contact surface area. The expressive variations in the engineering properties of these rocks subjected to the temperature (>500 °C) are the results of chemical processes

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Seiedi, Omolbanin, Mohammad Zahedzadeh, Emad Roayaei, Morteza Aminnaji, and Hossein Fazeli. "Experimental and modeling study of wettability alteration through seawater injection in limestone: a case study." Petroleum Science 17, no. 3 (January 9, 2020): 749–58. http://dx.doi.org/10.1007/s12182-019-00407-y.

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AbstractWater flooding is widely applied for pressure maintenance or increasing the oil recovery of reservoirs. The heterogeneity and wettability of formation rocks strongly affect the oil recovery efficiency in carbonate reservoirs. During seawater injection in carbonate formations, the interactions between potential seawater ions and the carbonate rock at a high temperature can alter the wettability to a more water-wet condition. This paper studies the wettability of one of the Iranian carbonate reservoirs which has been under Persian Gulf seawater injection for more than 10 years. The wetta

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Mack, Greg H., and T. Jerzykiewicz. "Provenance of post-Wapiabi sandstones and its implications for Campanian to Paleocene tectonic history of the southern Canadian Cordillera." Canadian Journal of Earth Sciences 26, no. 4 (April 1, 1989): 665–76. http://dx.doi.org/10.1139/e89-057.

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Late Campanian to Early Paleocene sandstones of the Alberta Foothills were derived from three types of rocks: (i) andesitic–dacitic volcanic rocks that were presumably comagmatic with middle to late Mesozoic plutons in the Omineca Crystalline Belt; (ii) low-grade metamorphic rocks in the suprastructure of the Omineca Crystalline Belt; and (iii) sedimentary rocks in die Rocky Mountain Thrust Belt, principally pelitic rocks in the western Main Ranges and carbonates and chert-arenites in the eastern Main and Front ranges. A paucity of quartzo-feldspathic rocks fragments and potassium feldspar ind

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Fahrudin, Eka Sainyakit, Ahmad Syauqi Hidayatillah, Purnaning Tuwuh Triwigati, and Muhajir. "Facies Development of Carbonate Rock and System Tract Influence Based on Fullbore Formation Microimager (FMI) and Well Log Analysis on Carbonate Reservoir Tuban Formation, North East Java Basin." E3S Web of Conferences 73 (2018): 02021. http://dx.doi.org/10.1051/e3sconf/20187302021.

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The North East Java Basin is known to be one of the basins that consist of Miocene carbonate rocks, like the reef carbonate of Tuban Formation. It has the potential hydrocarbons that can be explored. Therefore, the FMI log analysis is very important to identify carbonate rocks of Tuban Formation to know facies and characteristics of that carbonate rocks. The method used descriptive and analysis process of FMI and Gamma Ray log to determine facies of the carbonate rock and the system tract. Based on the result of FMI log analysis, there are variations lithofasies include mudstone, wackestone, p

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Christiansen, F. G., H. Nøhr-Hansen, and O. Nykjær. "The Cambrian Henson Gletscher Formation: a mature to postmature hydrocarbon source rock sequence from North Greenland." Rapport Grønlands Geologiske Undersøgelse 133 (December 31, 1987): 141–57. http://dx.doi.org/10.34194/rapggu.v133.7984.

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During the 1985 field season the Cambrian Henson Gletscher Formation in central North Greenland was studied in detail with the aim of evaluating its potential as a hydrocarbon source rock. The formation contains organic rich shale and carbonate mudstone which are considered to be potential source rocks. These are sedimentologically coupled with a sequence of sandstones and coarse carbonates which might be potential reservoir rocks or migration conduits. Most of the rocks exposed on the surface are, however, thermally mature to postrnature with respect to hydrocarbon generation, leaving only fe

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Stoppa, F., A. R. Woolley, and A. Cundari. "Extension of the melilite-carbonatite province in the Apennines of Italy: the kamafugite of Grotta del Cervo, Abruzzo." Mineralogical Magazine 66, no. 4 (August 2002): 555–74. http://dx.doi.org/10.1180/0026461026640049.

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AbstractA new occurrence of a rare kamafugite near L'Aquila, Abruzzo, is described in detail to characterize its paragenesis and to establish possible genetic links with similar alkaline mafic igneous rocks from the Oricola-Camerata Nuova (OC) volcanic field, ˜20 km to the west. Both occurrences belong to the Umbria-Latium-Ultralkaline-District (ULUD), an igneous district represented by rare kamafugites and carbonatites and distinct from the much more voluminous Roman Region (RR) rocks. The new kamafugite was found in a cave known as Grotta del Cervo (GC), associated with epiclastic and pyrocl

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Zhao, Hongyu, and Junhua Huang. "Characteristics of Calcium Isotopes at Different Water Depths and Their Palaeoenvironmental Significance for Carbonate Rocks of the Permian-Triassic Boundary in Chibi, Southern China." Minerals 12, no. 11 (November 14, 2022): 1440. http://dx.doi.org/10.3390/min12111440.

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Calcium isotopes of carbonate rocks can trace calcium cycles and record changes in the marine environment. As published calcium isotope profiles of carbonate rocks at the Permian-Triassic boundary are rare, comparative studies on deep-water profiles were lacking for the major extinction event that occurred during this time. We present sections of different water depths in the Chibi area of southern China that we have selected for a comparative study. We analyzed carbon isotopes, calcium isotopes, as well as major and trace elements of carbonates from two sections (Chibi North and Chibi West) t

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Torabi, A., M. U. Johannessen, and T. S. S. Ellingsen. "Fault Core Thickness: Insights from Siliciclastic and Carbonate Rocks." Geofluids 2019 (June 2, 2019): 1–24. http://dx.doi.org/10.1155/2019/2918673.

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Fault core accommodates intense deformation in the form of slip surfaces and fault rocks such as fault gouge, cataclasite, breccia, lenses, shale smear, and diagenetic features. The complexity and variation in fault core geometry and thickness affect fluid flow both along and across the fault. In this study, we have investigated a total of 99 faults in siliciclastic and carbonate rocks. This has resulted in two large datasets that include 871 fault core thickness measurements T in siliciclastic rocks and 693 measurements in carbonates, conducted at regular intervals along fault elevations (fau

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Nie, Xin, Chi Zhang, Chenchen Wang, Shichang Nie, Jie Zhang та Chaomo Zhang. "Variable secondary porosity modeling of carbonate rocks based on μ-CT images". Open Geosciences 11, № 1 (25 жовтня 2019): 617–26. http://dx.doi.org/10.1515/geo-2019-0049.

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Abstract As an essential carbonate reservoir parameter, porosity is closely related to rock properties. Digital rock physics (DRP) technology can help us to build forward models and find out the relationship between porosity and physical properties. In order to prepare models for the rock physical simulations of carbonate rocks, digital rock models with different porosities and fractures are needed. Based on a three-dimensional carbonate digital rock image obtained by X-ray microtomography (μ-CT), we used erosion and dilation in mathematical morphology to modify the pores, and fractional Brown

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Cooke, Andy P., Quentin J. Fisher, Emma A. H. Michie, and Graham Yielding. "Permeability of carbonate fault rocks: a case study from Malta." Petroleum Geoscience 26, no. 3 (August 12, 2019): 418–33. http://dx.doi.org/10.1144/petgeo2019-055.

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The inherent heterogeneity of carbonate rocks suggests that carbonate-hosted fault zones are also likely to be heterogeneous. Coupled with a lack of host–fault petrophysical relationships, this makes the hydraulic behaviour of carbonate-hosted fault zones difficult to predict. Here we investigate the link between host rock and fault rock porosity, permeability and texture, by presenting data from series of host rock, damage zone and fault rock samples from normally faulted, shallowly buried limestones from Malta. Core plug X-ray tomography indicates that texturally heterogeneous host rocks lea

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Lacalamita, M., G. Balassone, E. Schingaro, E. Mesto, A. Mormone, M. Piochi, G. Ventruti, and M. Joachimski. "Fluorophlogopite-bearing and carbonate metamorphosed xenoliths from theCampanian Ignimbrite (Fiano, southern Italy): crystal chemical, geochemical and volcanological insights." Mineralogical Magazine 81, no. 5 (October 2017): 1165–89. http://dx.doi.org/10.1180/minmag.2016.080.155.

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AbstractFluorine-, boron- and magnesium-rich metamorphosed xenoliths occur in the Campanian Ignimbrite deposits at Fiano (southern Italy), at ∼50 km northeast of the sourced volcanic area. These rocks originated from Mesozoic limestones of the Campanian Apennines, embedded in a fluid flow. The Fiano xenoliths studied consist of ten fluorophlogopite-bearing calc-silicate rocks and five carbonate xenoliths, characterized by combining mineralogical analyses with whole-rock and stable isotope data. The micaceous xenoliths are composed of abundant idiomorphic fluorophlogopite, widespread fluorite,

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Bhat, Ashaq Hussain, S. K. Pandita, H. N. Sinha, Bindra Thusu, and Ahsan Ul Haq. "Provenance, Depositional and Diagenetic Reconstruction of the Early Palaeozoic Succession in Kupwara District, Kashmir, North-western Himalaya." Journal of The Indian Association of Sedimentologists 38, no. 2 (December 31, 2021): 101–14. http://dx.doi.org/10.51710/jias.v38i2.192.

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Early Palaeozoic succession in Kupwara district of Jammu and Kashmir, North-western Himalaya comprise of sandstone, shale, carbonates and slate. The petrological properties of these rocks were used to work out the provenance, depositional environment and their diagenetic history. The siliciclastic sediments with interbedded carbonate rocks indicate shifts in sea level and consequent changes in energy conditions of the basin as well as biogenic interferences leading to carbonate precipitation in a shallow marine depositional environment. Provenance of these rocks has been of mixed nature with m

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