Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Eastern Alborz"'
Publikováno v:
Journal of Economic Geology, Vol 15, Iss 4, Pp 31-53 (2023)
This study investigates the geochemical and mineralogical characteristics of Takht Coal Spoils in Minoodasht, Iran. For this purpose, six representative spoil samples were collected. The geochemistry of the samples were studied using XRF and ICP-OES
Externí odkaz:
https://doaj.org/article/3435bd271b4144f68991df2e3d480fe9
Publikováno v:
Journal of Stratigraphy and Sedimentology Researches, Vol 36, Iss 4, Pp 59-86 (2020)
Abstract Chelcheli section (397m thick) about 70 km northwest of Shahroud on the Shahroud-Gorgan road (Tuskistan route), about 5 km east of the Chahar-Bagh village is sampled and studied to investigate the DC transition and the conodont facies change
Externí odkaz:
https://doaj.org/article/a46068539eed4e0198d0f587ba95f46a
Publikováno v:
Journal of Stratigraphy and Sedimentology Researches, Vol 36, Iss 1, Pp 89-114 (2020)
Abstract The biostratigraphy of Devonian–Carboniferous (D/C) boundary of Til-Abad section in Eastern alborz is carried out in this study. The studied section is located about 85 km of northeast Shahrud city and close to the Shahrud–Azadshahr road
Externí odkaz:
https://doaj.org/article/d275f52d67e5456b99b73141930820ed
Publikováno v:
Journal of Stratigraphy and Sedimentology Researches, Vol 35, Iss 2, Pp 49-72 (2019)
Abstract The Devonian/Carboniferous (DC) transition is characterized by several transgressive/regressive cycles which led to a widespread ocean anoxia known as the Hangenberg Black Shale Event (HBS), close to the D/C boundary a major sea-level fall (
Externí odkaz:
https://doaj.org/article/3468d569413949dfa432e0e47e939686
Akademický článek
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Akademický článek
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Publikováno v:
Journal of Economic Geology, Vol 8, Iss 1, Pp 117-128 (2016)
Introduction Maceral is a term to introduce organic components visible under a microscope (Stopes, 1935). The physical and chemical characteristics of macerals such as elemental composition, moisture content, hardness, density and petrographic chara
Externí odkaz:
https://doaj.org/article/b869bb6f4226490f9b8a9660af0e8193
Publikováno v:
Journal of Economic Geology, Vol 8, Iss 1, Pp 39-59 (2016)
Introduction Oolitic iron formations are sedimentary rocks with >5 vol.% oolites and >15 wt.% iron, corresponding to 21.4 wt.% Fe2O3 (Young, 1989; Petranek and Van Houten, 1997; Mucke and Farshad, 2005). In Iran, new iron oolite-bearing members have
Externí odkaz:
https://doaj.org/article/06ed184f3f64454cbac120d4349d66e0
Publikováno v:
Journal of Economic Geology, Vol 7, Iss 2, Pp 369-383 (2015)
Introduction The Alborz structural zone in northern Iran is the host of a number of important coal deposits. The Gheshlagh coal mine is one of them, which is located 35 km southeast of Azadshahr. Coal bearing strata in the Gheshlagh mining district
Externí odkaz:
https://doaj.org/article/93a493af5cf240fea91a554984f79096
Publikováno v:
International Journal of Mining and Geo-Engineering, Vol 47, Iss 2, Pp 115-127 (2013)
Subject analysis of the potential of spontaneous combustion in coal layers with analytical and numerical methods has been always considered as a difficult task because of the complexity of the coal behavior and the number of factors influencing it. E
Externí odkaz:
https://doaj.org/article/10acc7d51f79456ea8080d61673fbb69