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Artículos de revistas sobre el tema "Rocks, Sedimentary"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 5 de marzo de 2023

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1

Edgett, Kenneth S., and Ranjan Sarkar. "Recognition of Sedimentary Rock Occurrences in Satellite and Aerial Images of Other Worlds—Insights from Mars." Remote Sensing 13, no. 21 (October 26, 2021): 4296. http://dx.doi.org/10.3390/rs13214296.

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Sedimentary rocks provide records of past surface and subsurface processes and environments. The first step in the study of the sedimentary rock record of another world is to learn to recognize their occurrences in images from instruments aboard orbiting, flyby, or aerial platforms. For two decades, Mars has been known to have sedimentary rocks; however, planet-wide identification is incomplete. Global coverage at 0.25–6 m/pixel, and observations from the Curiosity rover in Gale crater, expand the ability to recognize Martian sedimentary rocks. No longer limited to cases that are light-toned,

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2

Lyu, Qiqi, Shunshe Luo, Yulong Guan, Jinhua Fu, Xiaobing Niu, Liming Xu, Shengbin Feng, and Shixiang Li. "A new method of lithologic identification and distribution characteristics of fine - grained sediments: A case study in southwest of Ordos Basin, China." Open Geosciences 11, no. 1 (February 26, 2019): 17–28. http://dx.doi.org/10.1515/geo-2019-0002.

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Abstract Lithologic identification is critical for studying fine - grained sediments, which further elucidates sedimentary environment, and formation. The oil - bearing Chang 7 Section of the Yanchang Formation in Ordos Basin contains thick dark mudstone with a wide distribution, interbedded by siltstone and fine sandstone. The lacustrine fine - grained sedimentary rocks constitute the chief source rock of the Yanchang Formation. On the grounds of fine core description, thin rock slice identification and X - ray diffraction analysis, we proposed a new method based on conventional logging data.

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3

Zhao, Ranlei, Xiao Xu, Wentao Ma, Cunlei Li, Qiushi Zhang, and Qingyou Yue. "Reservoir Characteristics and Controlling Factors of Sedimentary Pyroclastic Rocks in Deep-Buried Basins: A Case Study of Yingtai Fault Depression, Southern Songliao Basin." Energies 15, no. 18 (September 9, 2022): 6594. http://dx.doi.org/10.3390/en15186594.

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In this article, based on core description, thin section, scanning electron microscope (SEM), well logging and reservoir physical properties, the reservoir controlling factors of sedimentary pyroclastic rocks in deep-buried basins are assessed via the relation between reservoirs and defining factors, including lithological characteristics, sedimentary microfacies and diagenesis. In addition, the contributing factors of anomalously high-porosity and high-permeability zone are analyzed. The lithological characteristics and diagenesis of the sedimentary pyroclastic rocks are closely related to re

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4

DA SILVA, JOSÉ LUIZ SILVÉRIO, and EGYDIO MENEGOTTO. "Aspectos Geoquímicos de Silicificações em Rochas Sedimentares no Rio Grande do Sul, Brasil." Pesquisas em Geociências 32, no. 2 (December 31, 2005): 29. http://dx.doi.org/10.22456/1807-9806.19543.

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Some exposures of silicified sedimentary rocks and duricrusts occur in the central Depressão Periférica along the edge of the Paraná Basin in Rio Grande do Sul State, in southern part of Brazil. These silicified materials were firstly studied in the petrographic aspects by Silvério da Silva & Menegotto (2002). This paper presents geochemical results of the analysis on samples of sedimentary rocks and silica duricrusts collected in two profiles (Santa Maria and Cachoeira do Sul). The relationships between the sedimentary rocks and the duricrusts, as well their probable provenance and genesi

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5

LINDSTRÖM, SOFIE. "Palynology of Permian shale, clay and sandstone clasts from the Basen till in northern Vestfjella, Dronning Maud Land." Antarctic Science 17, no. 1 (February 28, 2005): 87–96. http://dx.doi.org/10.1017/s0954102005002476.

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The palynological content of randomly collected sedimentary rock clasts from the till on the south-east slope of the Basen nunatak in northern Vestfjella in western Dronning Maud Land indicate that these sedimentary rocks were derived from strata of Middle Permian age. The palynological content and preservation is similar to palynofloras described from the sedimentary rocks that crop out at the Fossilryggen nunatak to the south-east, therefore, it seems likely that the Fossilryggen area represents the source of the sedimentary rock samples in the Basen till. This is further supported by known

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6

Bilić, Šime, and Vesnica Garašić. "PETROLOGICAL CHARACTERISTICS OF CLASTIC SEDIMENTARY ROCKS FROM THE ST. BARBARA ORE MINE IN RUDE NEAR SAMOBOR." Rudarsko-geološko-naftni zbornik 36, no. 1 (2021): 121–35. http://dx.doi.org/10.17794/rgn.2021.1.10.

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In the scope of this research, the petrographic and geochemical analyses of clastic sedimentary rocks from the St. Barbara, copper and iron ore mine in Rude near Samobor, have been made, aiming to classify and determine the provenance and environment of formation of clastic sedimentary rocks, as well as the influence of hydrothermal fluids on their properties. Eight samples were collected in total from different locations in the mine. Six of those samples have been studied in detail. The results showed structural and geochemical variability and uneven hydrothermal alteration intensity in the s

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7

Pujar, Anant G., A. Sreenivasa, and Ajaykumar N. Asode. "Petrography and Provenance Study of South-Central Part of Kaladgi Basin, Belgaum, Karnataka, India." International Journal of Economic and Environmental Geology 11, no. 1 (July 7, 2020): 108–12. http://dx.doi.org/10.46660/ijeeg.vol11.iss1.2020.421.

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The area under investigation covers the south-central part of Kaladgi series comprising of sedimentary rocks, mainly quartzarenites. From the geological point of view the study area comprises southcentral part of Kaladgi basin covering around 54 km2 which encompasses rocky hills of moderate height, showing three types of facies i.e., argillaceous, arenaceous and rudaceous. Among these three, arenaceous facies is more prominent in the area. These sedimentary rocks rest unconformably over gneisses. Detailed study of the rocks exposed are done by studying the petrological aspects of the rock samp

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8

Pujar, Anant G., A. Sreenivasa, and Ajaykumar N. Asode. "Petrography and Provenance Study of South-Central Part of Kaladgi Basin, Belgaum, Karnataka, India." International Journal of Economic and Environmental Geology 11, no. 1 (July 7, 2020): 108–12. http://dx.doi.org/10.46660/ojs.v11i1.421.

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The area under investigation covers the south-central part of Kaladgi series comprising of sedimentary rocks, mainly quartzarenites. From the geological point of view the study area comprises southcentral part of Kaladgi basin covering around 54 km2 which encompasses rocky hills of moderate height, showing three types of facies i.e., argillaceous, arenaceous and rudaceous. Among these three, arenaceous facies is more prominent in the area. These sedimentary rocks rest unconformably over gneisses. Detailed study of the rocks exposed are done by studying the petrological aspects of the rock samp

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9

Hu, Zeng, Fang, Qi, Yin, Chen, Li, and Zhu. "Geochemical Study of Detrital Apatite in Sediment from the Southern Okinawa Trough: New Insights into Sediment Provenance." Minerals 9, no. 10 (October 8, 2019): 619. http://dx.doi.org/10.3390/min9100619.

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Detrital apatite is a promising accessory mineral for reliable fingerprinting of the protolith composition of detrital sediment. Here, we present the geochemical compositions of detrital apatites from four sections of a high-resolution (~140 cm/kyr) sedimentary archive from the southern Okinawa Trough (SOT) for constraining sediment source rock types and establishing changes in provenance. A series of diagrams based on the geochemical data show that apatites in Section 1 derived mainly from mafic/intermediate rocks, while apatites in the three younger sections largely originated from mafic/int

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10

Rasbury, E. Troy, and Jennifer M. Cole. "Directly Dating Sedimentary Rocks." Paleontological Society Papers 12 (October 2006): 77–105. http://dx.doi.org/10.1017/s1089332600001364.

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This contribution seeks to provide a summary of radiometric dating techniques that are currently applicable to Phanerozoic sedimentary deposits and therefore relevant to paleontologists. First we overview the assumptions necessary for radiometric dating and introduce isochrons and concordia diagrams as methods for calculating ages and evaluating isotope systematics. We then focus on the four most promising systems: U-Pb dating of carbonates, Re-Os dating of black shales, and U-Pb and Lu-Hf dating of phosphates. We review expected geochemical behavior of daughter and parent isotopes in the cont

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11

Marica, F., U. Mayer, B. Balcom, and T. Al. "Diffusivity in sedimentary rocks." Magnetic Resonance Imaging 25, no. 4 (May 2007): 573. http://dx.doi.org/10.1016/j.mri.2007.01.074.

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12

Ariansyah, Muhammad Resky, Muhammad Fawzy Ismullah Massinai, and Muhammad Altin Massinai. "Rock Types Classification and Distribution on Anabanua Village, Barru Regency, South Sulawesi." Jurnal Geomine 8, no. 1 (June 27, 2020): 1–8. http://dx.doi.org/10.33536/jg.v8i1.530.

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Anabanua Village, Barru Regency is one of the areas in South Sulawesi that has quite unique geological conditions. This condition inseparably comes from the complicated geological process that took place during the formation of the island, Sulawesi. In Anabanua Village, there are many types of rocks such as sedimentary rocks, metamorphic rocks and igneous rocks. This paper aims to map and classify the types of rock by taking samples on different places in the research area. Then we observe the samples physical properties. The results showed, from taking 10 rock samples in different places, the

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13

Sang, Pham Nhu, Nguyen Tien Dung, Phan Thi Thanh Hien, and Vo Thi Cong Chinh. "The degree of chemical weathering in the Ba River basin, South Central Vietnam: Major-element geochemistry investigations of morden river sediments and sedimentary rocks." Journal of Mining and Earth Sciences 61, no. 1 (February 28, 2020): 82–91. http://dx.doi.org/10.46326/jmes.2020.61(1).09.

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Major-element geochemistry of Miocene sedimentary rock and modern river sediment samples in the Ba River basin, South Central Vietnam are utilized to assess the degree of chemical weathering in the Miocene and the present time. Sediment samples were analysed by X-ray fluorescence (XRF) spectrometer show that Miocene sedimentary rocks contain higher SiO2 and K2O, but lower Fe2O3, TiO2, MgO, Na2O, MnO, CaO, P2O5 than modern river sediment. Major-element geochemistry indicates that Miocene sedimentary rocks and modern river sediment are characterized by stronger depliption of Ca, Na and Mg than K

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14

Liu, Chao, Hai Tao Xue, Shuang Wang, and Yu Jiao Sun. "Study on Law of Structural Evolution and Sedimentary Evolution for North Uskyurt Basin." Advanced Materials Research 671-674 (March 2013): 302–5. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.302.

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North Uskyurt Basin, located on Turan Plain, northwestern Central Asian, is continental polycyclic cratonic. The structural evolution of the basin underwent six phases: basement formulation, passive edge, rifting, post-rifting, compression, early Neogene depression. Regional structural evolution takes control of complicated transition of North Uskyurt sedimentary structure. In general, basin sedimentary environment underwent basement (granite, metamorphic rocks) passive edge, late Devonian epoch carboniferous period (marine facies) rifting, late Permian epoch-triassic period (continental facie

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15

Read, D., D. C. Cooper, and J. M. McArthur. "The composition and distribution of nodular monazite in the Lower Palaeozoic rocks of Great Britain." Mineralogical Magazine 51, no. 360 (June 1987): 271–80. http://dx.doi.org/10.1180/minmag.1987.051.360.09.

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AbstractMillimetric, ellipsoidal monazite nodules found within Lower Palaeozoic sedimentary rocks in Wales, south-west England and Brittany are characterised by a pronounced zonation of light and heavy REE, an inclusion fabric of low-grade metamorphic minerals indistinguishable from the host rock and a low Th content. They are interpreted as the product of in situ recrystallization of detrital monazites derived from pegmatitic or granitic source rocks and are potentially useful as indicators of Lower Palaeozoic sedimentary rock provenance.

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16

Yang, Yepeng, Zaixing Jiang, Jianguo Zhang, Zongxuan Zhang, and Chun Yang. "Control Effect of Deposition Processes on Shale Lithofacies and Reservoirs Characteristics in the Eocene Shahejie Formation (Es4s), Dongying Depression, China." Energies 16, no. 5 (February 24, 2023): 2200. http://dx.doi.org/10.3390/en16052200.

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The lacustrine fine-grained sedimentary rocks in the upper interval of the fourth member of the Eocene Shahejie Formation (Es4s) in the Dongying Depression are important shale oil exploration targets in Bohai Bay Basin. They are widely distributed and rich in organic matter. In this study, samples were observed under the optical microscope and FESEM, combined with geochemical test and physical property analysis to study the sedimentary characteristics and reservoir characteristics of them. Nine lithofacies are recognized based on the mineral composition, the content of organic matter and the b

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17

Takagi, T., S. M. Koh, M. S. Song, M. Itoh, and K. Mogi. "Geology and properties of the Kawasaki and Dobuyama bentonite deposits of Zao region in northeastern Japan." Clay Minerals 40, no. 3 (September 2005): 333–50. http://dx.doi.org/10.1180/0009855054030177.

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AbstractThe Kawasaki and Dobuyama bentonite deposits in northeastern Japan show contrasting properties even though they are only 5 km apart in a sequence of Neogene sedimentary and pyroclastic rocks. The Kawasaki deposit consists of stratiform bentonite layers up to >50 m thick, and its wall rocks are unaltered shallow marine sedimentary rocks. In contrast, the Dobuyama deposit consists of a funnel-shaped ore body 200 m across, and its wall rocks are hydrothermally altered terrestrial rhyolitic pyroclastic rocks. The Kawasaki and Dobuyama bentonites mainly consist of Na-Ca smectite and Ca s

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18

Bérubé, Charles L., Gema R. Olivo, Michel Chouteau, and Stéphane Perrouty. "Mineralogical and textural controls on spectral induced polarization signatures of the Canadian Malartic gold deposit: Applications to mineral exploration." GEOPHYSICS 84, no. 2 (March 1, 2019): B135—B151. http://dx.doi.org/10.1190/geo2018-0404.1.

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Applications of the spectral induced polarization (SIP) method to mineral exploration are limited by our knowledge of the relationships among rock texture, mineral composition, and electrical properties. Laboratory SIP responses were measured on rock samples from the Canadian Malartic gold deposit. Field SIP responses were also measured at the outcrop scale, along a profile that intersects a well-studied mineralized zone. The mineralogy and the texture of sedimentary rocks from this deposit were quantitatively determined with mineral liberation analysis. A systematic decrease (Pearson [Formula

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19

Raven, K. G., K. S. Novakowski, R. M. Yager, and R. J. Heystee. "Supernormal fluid pressures in sedimentary rocks of southern Ontario – western New York State." Canadian Geotechnical Journal 29, no. 1 (February 1, 1992): 80–93. http://dx.doi.org/10.1139/t92-009.

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Fluid pressures up to 1.7 times greater than hydrostatic have been measured in argillaceous Paleozoic rocks of low permeability in southern Ontario and western New York State. These supernormal formation fluid pressures were measured at depths of 50–310 m using submersible pressure transducers with straddle packers and multiple-packer casings isolating the test intervals. Measurements were obtained over periods of 7–46 months following casing installations. The pressure measurements from 11 monitoring wells are compiled and supporting hydrogeologic data for 5 selected wells are used as example

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20

TROLL, VALENTIN R., JANE P. CHADWICK, ROBERT M. ELLAM, SUSAN Mc DONNELL, C. HENRY EMELEUS, and IAN G. MEIGHAN. "Sr and Nd isotope evidence for successive crustal contamination of Slieve Gullion ring-dyke magmas, Co. Armagh, Ireland." Geological Magazine 142, no. 6 (November 2005): 659–68. http://dx.doi.org/10.1017/s0016756805001068.

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The Palaeogene Slieve Gullion Igneous Centre in southern Armagh, Northern Ireland, consists of a layered central intrusive complex surrounded by a prominent and slightly older ring-dyke that intrudes both Lower Palaeozoic sedimentary rocks and the Caledonian Newry Granodiorite pluton (452 Ma). The ring-dyke comprises two major rock types: porphyritic felsite and porphyritic granophyre. We analysed both ring-dyke lithologies, both types of country rock, and a local Palaeogene basalt dyke sample for Sr and Nd isotopes. Trace element and whole rock data for this suite suggest that there are two d

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21

Otavio, Jonatas Malaquias, Osvaldo Girão, Tiago Fernando de Holanda, and Wenderson Sávyo Aguiar Da Silva. "FORMAÇÃO E DIAGÊNESE DE ARENITOS DE PRAIA: Uma Revisão Conceitual." CLIO – Arqueológica 32, no. 3 (September 5, 2017): 88. http://dx.doi.org/10.20891/clio.v32n3p88-106.

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Os arenitos de praia, ou beachrocks, são sedimentos que sofreram um processo de litificação e são encontrados paralelamente à linha de costa na zona intermaré, apresentando uma forma alongada, estreita e cimentados por carbonato de cálcio. O processo de diagênese consiste na formação da rocha sedimentar propriamente dita a partir da compactação, dissolução, cimentação e recristalização. O estudo da formação e diagênese do arenito de praia são relevantes pois possibilita o entendimento de como as rochas sedimentares detríticas são geradas, além de reconhecer como a variação do nível do mar se c

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22

Bucholz, Claire E., and Christopher J. Spencer. "Strongly Peraluminous Granites across the Archean–Proterozoic Transition." Journal of Petrology 60, no. 7 (June 7, 2019): 1299–348. http://dx.doi.org/10.1093/petrology/egz033.

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Abstract Strongly peraluminous granites (SPGs) form through the partial melting of metasedimentary rocks and therefore represent archives of the influence of assimilation of sedimentary rocks on the petrology and chemistry of igneous rocks. With the aim of understanding how variations in sedimentary rock characteristics across the Archean–Proterozoic transition might have influenced the igneous rock record, we compiled and compared whole-rock chemistry, mineral chemistry, and isotope data from Archean and Paleo- to Mesoproterozoic SPGs. This time period was chosen as the Archean–Proterozoic tr

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23

SAEIN, ALI FARZIPOUR, and ZAHRA TAJMIR RIAHI. "Controls on fracture distribution in Cretaceous sedimentary rocks from the Isfahan region, Iran." Geological Magazine 156, no. 06 (May 25, 2017): 1092–104. http://dx.doi.org/10.1017/s0016756817000346.

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AbstractIn this study, relationships between fracture patterns, lithology, thickness, diagenetic processes and grain size are evaluated within Cretaceous sediments in two sections of Dizlu and Kolah Ghazi of Isfahan. This study area was selected based on its outcrops of different rock units and its well-developed tectonic fractures. The fracture patterns within stratigraphic units of these sections are studied using geometrical and statistical analyses. This study finds that variable fracture spacing and fracture spacing ratios can be affected by lithology, thickness, grain size of sediments a

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24

Muhammad, W. N., N. I. Setiawan, S. Husein, and M. Nukman. "A preliminary study of geology and skarn of Cemorosewu Area, Bayat, Central Java, Indonesia." IOP Conference Series: Earth and Environmental Science 851, no. 1 (October 1, 2021): 012045. http://dx.doi.org/10.1088/1755-1315/851/1/012045.

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Abstract We present the first finding of skarn rocks in Cemorosewu area of East Jiwo Hill, Bayat, Central Java, Indonesia. The geological conditions of this area which related to the appearance of the skarn is also reported. The methods used in this research are DEM acquisition using drone to generate basemap for geological mapping and thin section petrographic analyses. The geological map shows that Cemorosewu area consists of metamorphic rocks (mica phyllite, graphite phyllite, with quartzite and marble lenses), sedimentary rocks (carbonate breccia and siltstone), and igneous rock (microdior

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25

Malin, M. C. "Sedimentary Rocks of Early Mars." Science 290, no. 5498 (December 8, 2000): 1927–37. http://dx.doi.org/10.1126/science.290.5498.1927.

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26

Baranov, V. A., V. A. Kirichenko, and Y. V. Antipovich. "Geological processes in sedimentary rocks." Geo-Technical mechanics, no. 139 (2018): 179–94. http://dx.doi.org/10.15407/geotm2018.02.179.

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27

Fielding, C. R. "Sedimentary Rocks in the Field." Sedimentary Geology 109, no. 1-2 (March 1997): 207–8. http://dx.doi.org/10.1016/s0037-0738(96)00039-5.

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28

Narr, W., and J. Suppe. "Joint spacing in sedimentary rocks." Journal of Structural Geology 13, no. 9 (1991): 1037–48. http://dx.doi.org/10.1016/0191-8141(91)90055-n.

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29

McBride, Earle F. "Petrology of the sedimentary rocks." Geomorphology 4, no. 2 (June 1991): 156–57. http://dx.doi.org/10.1016/0169-555x(91)90027-8.

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30

Lesmes, David P., and Frank Dale Morgan. "Dielectric spectroscopy of sedimentary rocks." Journal of Geophysical Research: Solid Earth 106, B7 (July 10, 2001): 13329–46. http://dx.doi.org/10.1029/2000jb900402.

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31

McCann, C. "Geophysical properties of sedimentary rocks." Marine and Petroleum Geology 9, no. 2 (April 1992): 114. http://dx.doi.org/10.1016/0264-8172(92)90083-q.

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32

McKinley, MarvinD. "Diffusion coefficients in sedimentary rocks." Journal of Hazardous Materials 28, no. 1-2 (September 1991): 207–8. http://dx.doi.org/10.1016/0304-3894(91)87036-2.

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33

Evans, Diane. "Multisensor classification of sedimentary rocks." Remote Sensing of Environment 25, no. 2 (July 1988): 129–44. http://dx.doi.org/10.1016/0034-4257(88)90097-1.

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34

Li, Yuezhe, Jie Yin, and Zhenqi Wang. "Lithofacies Characteristics and Controlling Factors of Fine-Grained Sedimentary Rocks in the Lower First Member of the Shahejie Formation in the Northern Lixian Slope of Raoyang Sag, China." Minerals 12, no. 11 (November 8, 2022): 1414. http://dx.doi.org/10.3390/min12111414.

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In order to further explore the potential of unconventional oil and gas in the northern Lixian Slope of Raoyang Sag, the lithofacies types and their controlling factors of the lower first member of the Shahejie Formation (Es1L) in the Xiliu area were analyzed through the comprehensive application of core log studies, micro-sections and their magnified analyses, mineral suits recognitions with XRD, and major and organic geochemistry. The results show that the lacustrine sedimentary rocks of Es1L in the Xiliu area comprise five lithofacies types: medium organic silty mixed fine-grained rock, med

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35

Li, Qiang. "Geochemistry and Diagenetic Pattern of Ore-Bearing Rocks about Two Types of Gold Deposit in Fengxian-Taibai Basin, South Qinling." Advanced Materials Research 616-618 (December 2012): 240–45. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.240.

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Baguamiao and Shuangwang gold deposit are two important gold types in Fengxian-Taibai basin. The gold deposits are all located at the bottom of the Upper-Devonian Xing-hongpu Formation. However the ore-bearing rocks are different between them. The ore-bearing rock of Baguamiao gold deposit is ankerite rocks, which is concordant with the strata by bedded or stratoid and assume rhythmic layering form. The ore-bearing rock of Shuangwang gold deposit is albite breccias, which are mostly lens-shaped. The data of petrochemistry show that both of them are poor in Fe2O3 and K2O, which are different fr

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36

Zisser, Norbert, Georg Nover, Helmut Dürrast, and Siegfried Siegesmund. "Relationship between electrical and hydraulic properties of sedimentary rocks." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 158, no. 4 (December 1, 2007): 883–94. http://dx.doi.org/10.1127/1860-1804/2007/0158-0883.

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37

Crook, Keith A. W. "Sedimentary geology: An introduction to sedimentary rocks and stratigraphy." Sedimentary Geology 107, no. 3-4 (January 1997): 304–6. http://dx.doi.org/10.1016/s0037-0738(97)84049-3.

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38

Yan, Fuyong, De-Hua Han, Tongcheng Han, and Xue-Lian Chen. "Comparison of seismic anisotropy of sedimentary strata at low- and high-frequency limits." GEOPHYSICS 85, no. 1 (November 22, 2019): MR1—MR10. http://dx.doi.org/10.1190/geo2018-0677.1.

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The layer-induced seismic anisotropy of sedimentary strata is frequency-dependent. At the low-frequency limit, the effective anisotropic properties of the layered media can be estimated by the Backus averaging model. At the high-frequency limit, the apparent anisotropic properties of the layered media can be estimated by ray theory. First, we build a database of laboratory ultrasonic measurement on sedimentary rocks from the literature. The database includes ultrasonic velocity measurements on sandstones and carbonate rocks, and velocity-anisotropy measurements on shales. Then, we simulate the

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39

Bock, B., S. M. McLennan, and G. N. Hanson. "The Taconian orogeny in southern New England: Nd-isotope evidence against addition of juvenile components." Canadian Journal of Earth Sciences 33, no. 12 (December 1, 1996): 1612–27. http://dx.doi.org/10.1139/e96-122.

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Nd-isotope data for pre-Taconian (meta)sedimentary and igneous rocks, syn-Taconian (meta)sedimentary rocks, and Late Ordovician–Silurian plutonic rocks indicate that the Ordovician Taconian orogeny did not add significant amounts of juvenile crust to the Laurentian margin in southern New England. Nd-isotope compositions of Grenvillian crust and Late Proterozoic to Early Cambrian rift sediments range from εNd of −3.1 to −6.6 at 450 Ma. Sedimentary rocks deposited during the Cambrian and the early Middle Ordovician, which represent the drift stage of Laurentia, and earliest Taconian sedimentary

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Marinos, P. V., and G. Tsiambaos. "STRENGTH AND DEFORMABILITY OF SPECIFIC SEDIMENTARY AND OPHIOLITHIC ROCKS." Bulletin of the Geological Society of Greece 43, no. 3 (January 24, 2017): 1259. http://dx.doi.org/10.12681/bgsg.11302.

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The paper deals with the evaluation of strength and deformability of sedimentary rocks and ophiolites based on the processing of laboratory testing results. Characteristic values and their typical range for the parameters σci, Ei , as well as the Modulus Ratio (MR) are presented. These parameters are significant for the estimation of the strength and deformability of the rock mass since σci is basic component for the solution of Hoek-Brown failure criterion and Ei and MR are important components of the latest rock mass deformability expression (Hoek-Diedrichs, 2006). The recent site investigat

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Abdulsalam, N. N., and O. Ologe. "Measurement of Magnetic Susceptibility on Some Rock Samples in Parts of Kuje Area, Abuja-Nigeria." NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES 1 (March 13, 2019): 275–80. http://dx.doi.org/10.46912/napas.49.

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Magnetic Susceptibility values are important in interpreting regional magnetic anomalies and in crustal modeling. In this study, Magnetic Susceptibility has been measured on rock samples from the sedimentary succession of Kuje Area in FCT. Variation of susceptibility for the different samples has been analyzed and confirm in the study. According to the measured susceptibility values based on the selected samples, the minimum susceptibility value for sedimentary rocks was found to be 0 which was the minimum value obtained for Dolomite and the maximum susceptibility value for sedimentary rocks w

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Ansdell, Kevin M., Karen A. Connors, Richard A. Stern, and Stephen B. Lucas. "Coeval sedimentation, magmatism, and fold-thrust belt development in the Trans-Hudson Orogen: geochronological evidence from the Wekusko Lake area, Manitoba, Canada." Canadian Journal of Earth Sciences 36, no. 2 (February 1, 1999): 293–312. http://dx.doi.org/10.1139/e98-082.

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Lithological and structural mapping in the east Wekusko Lake area of the Flin Flon Belt, Trans-Hudson Orogen, suggested an intimate relationship between magmatism, fluvial sedimentation, and initiation of fold and thrust belt deformation. Conventional U-Pb geochronology of volcanic rocks in fault-bounded assemblages provides a minimum age of 1876 ± 2 Ma for McCafferty Liftover back-arc basalts, and ages of between 1833 and 1836 Ma for the Herb Lake volcanic rocks. A rhyolite which unconformably overlies Western Missi Group fluvial sedimentary rocks has complex zircon systematics. This rock may

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Nkpadobi, Johnbosco Ikenna, John Kuna Raj, and Tham Fatt Ng. "Classification of cut slopes in weathered meta-sedimentary bedrocks." Earth Sciences Research Journal 20, no. 2 (July 1, 2016): 1. http://dx.doi.org/10.15446/esrj.v20n2.52781.

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In order of abundance, the meta-sedimentary rocks along Pos Selim Highway in Perak state Malaysia comprise quartz mica schist, graphitic schist, and quartzite layers. Field investigations revealed that these meta-sedimentary rocks have gradational weathering profile based on differences particularly in textures, hardness, lateral changes in colour, and consistency of material extension. The results from uniaxial compressive strength tests confirmed field observations whereby failure occurred mostly on outcrops having joints almost perpendicular to foliation. From the kinematic analyses, the in

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Wakabayashi, John. "Clastic Sedimentary Rocks and Sedimentary Mélanges: Potential Naturally Occurring Asbestos Occurrences (Amphibole and Serpentine)." Environmental and Engineering Geoscience 26, no. 1 (February 20, 2020): 15–19. http://dx.doi.org/10.2113/eeg-2267.

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ABSTRACT Petrography of mélange matrix and clastic sedimentary rocks in coastal California reveals the occurrence of detrital serpentine and detrital asbestiform sodic amphibole (glaucophane). Many sandstones of the Franciscan Complex have small amounts of detrital serpentine, with amounts of up to several percent in some cases. Detrital amphibole, including asbestiform glaucophane, is also present in some sandstones. Whereas rare sandstones have so much detrital glaucophane that they appear blue in hand specimen (up to nearly half of the rock volume), most glaucophane-bearing sandstones lack

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Khishigsuren, Sodnom, Nuramkhaan Manchuk, Ser-Od Tseden-Ish, and Bayarmaa Batsaikhan. "Petrochemical study of Middle-Late Paleozoic sedimentary and metamorphic rocks near the great meandering of Tuul River, Central Mongolia." Mongolian Geoscientist, no. 48 (July 4, 2019): 3–16. http://dx.doi.org/10.5564/mgs.v0i48.1144.

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The great meandering of Tuul River is located in the Khentii section of the Khangai-Khentii orogenic belt, Central Mongolia. At the study area, dominanty distributed sedimentary and metamorphic roks of venlok-lower Devonian Sugnugur Formation of Asralt Khairkhan terrane and Pensilvanian Altan-Ovoo Formation of Ulaanbaatar terrane. The source of sedimentary rock are important to understand the geology and tectonic evoluation of the region. Whole-rock major elements compositions of 15 sandstone and mudrocks (siltstone and mudstone) and shale from the Sugnugur and Altan-Ovoo Formations were deter

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Petersen, Nathan T., Paul L. Smith, James K. Mortensen, Robert A. Creaser, and Howard W. Tipper. "Provenance of Jurassic sedimentary rocks of south-central Quesnellia, British Columbia: implications for paleogeography." Canadian Journal of Earth Sciences 41, no. 1 (January 1, 2004): 103–25. http://dx.doi.org/10.1139/e03-073.

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Jurassic sedimentary rocks of southern to central Quesnellia record the history of the Quesnellian magmatic arc and reflect increasing continental influence throughout the Jurassic history of the terrane. Standard petrographic point counts, geochemistry, SmNd isotopes and detrital zircon geochronology, were employed to study provenance of rocks obtained from three areas of the terrane. Lower Jurassic sedimentary rocks, classified by inferred proximity to their source areas as proximal or proximal basin are derived from an arc source area. Sandstones of this age are immature. The rocks are geo

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Irwan, Andesta Granitio. "Effect of Porosity on Uniaxial Compressive Strength in Sedimentary Rocks." PROMINE 8, no. 2 (March 4, 2021): 61–64. http://dx.doi.org/10.33019/promine.v8i2.2057.

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The rock strength parameter is an important factor used in determining the geotechnical design in determining the stability of the underground slope or mine. One of the rock strength tests in the laboratory (intact rock) is the uniaxial compressive strength test. One of the factors that influence rock strength is the porosity of the rock itself, especially in sedimentary rocks. The rock porosity test is carried out by testing the physical properties of the rock, then a regression analysis is carried out to obtain the correlation of the effect of porosity on rock strength and the correlation be

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Setiadi, I., Marjiyono, and T. B. Nainggolan. "Gravity Data Analysis Based on Optimum Upward Continuation Filter and 3D Inverse Modelling (Case Study at Sedimentary Basin in Volcanic Region Malang and Its Surrounding Area, East Java)." IOP Conference Series: Earth and Environmental Science 873, no. 1 (October 1, 2021): 012008. http://dx.doi.org/10.1088/1755-1315/873/1/012008.

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Abstract The study on the fore-arc sedimentary basin for hydrocarbon exploration is rare because of the more complicated geological structures, and conventional seismic methods cannot optimally penetrate the rock layers as there are many volcanic and limestone rocks. One of the natural resources potential in the Southern part of the East Java region, especially in Malang and its surrounding areas is the possibility of hydrocarbons in the fore-arc basin, so research is needed to know the existence of these sedimentary basins. The gravity method is one of the geophysical methods used to assess s

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Li, Xiaoshuang, Yingchun Li, and Saisai Wu. "Experimental Investigation into the Influences of Weathering on the Mechanical Properties of Sedimentary Rocks." Geofluids 2020 (December 8, 2020): 1–12. http://dx.doi.org/10.1155/2020/8893299.

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The time-dependent behaviors of the sedimentary rocks which refer to the altering of the mechanical and deformable properties of rock elements in the long-term period are of increasing importance in the investigation of the failure mechanism of the rock strata in underground coal mines. In order to obtain the accurate and reliable mechanical parameters of the sedimentary rocks at different weathering grades, the extensive experimental programs including the Brazilian splitting test, uniaxial compression tests, and direct shear tests have been carried out on the specimens that exposed to the na

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Ma, Ke, Anzhou Ma, Guodong Zheng, Ge Ren, Fei Xie, Hanchang Zhou, Jun Yin, Yu Liang, Xuliang Zhuang, and Guoqiang Zhuang. "Mineralosphere Microbiome Leading to Changed Geochemical Properties of Sedimentary Rocks from Aiqigou Mud Volcano, Northwest China." Microorganisms 9, no. 3 (March 9, 2021): 560. http://dx.doi.org/10.3390/microorganisms9030560.

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The properties of rocks can be greatly affected by seepage hydrocarbons in petroleum-related mud volcanoes. Among them, the color of sedimentary rocks can reflect the changes of sedimentary environment and weathering history. However, little is known about the microbial communities and their biogeochemical significance in these environments. In this study, contrasting rock samples were collected from the Aiqigou mud volcano on the southern margin of the Junggar Basin in Northwest China as guided by rock colors indicative of redox conditions. The physicochemical properties and mineral compositi

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