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Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 28 січня 2023

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1

Mark, Kathleen. "From Geosynclinal to Geosyncline." Earth Sciences History 11, no. 2 (January 1, 1992): 68–69. http://dx.doi.org/10.17704/eshi.11.2.48j84852842rg203.

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In 1857, James Hall suggested that the Appalachian Mountains had formed from sediments accumulated on an ancient seafloor which had gradually subsided under their weight. His idea received little immediate support, but in 1873 it was accepted in modified form by James D. Dana, in whose opinion a contraction-caused downwarp, which he called a geosynclinal, had preceded the accumulation of sediments. In 1883, in response to a growing trend, Dana changed the name to geosyncline, and in 1895 he concluded that a depositional trough, as suggested by Hall, caused cither by gravity or contraction, was a prelude to all mountain making.

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2

Kushnir, D. G. "New geodynamics: geosyncline plate tectonics." Actual Problems of Oil and Gas, no. 34 (November 30, 2021): 3–20. http://dx.doi.org/10.29222/ipng.2078-5712.2021-34.art1.

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For the first time, on the basis of the data set of the Taimyr geophysical site, the processes that cause vertical oscillatory movements of large blocks of the continental crust and largely determine its deep structure are confidently recorded. In this regard, the conceptual apparatus of plate tectonics is being expanded due to terms that were not originally used for it, previously used within the framework of geosyncline theory. Modern geodynamics combines concepts opposed in the past, thereby forming a conceptually new geosyncline plate tectonics. Under the new paradigm, the oil and gas prospects of an area are determined not so much by its confinement to a geostructure of any age, as by the current stage of the geosyncline cycle, characterized by subsidence, active sedimentation processes and formation of a sedimentary basin or, conversely, orogenesis and dominant erosion of sediments. Thus, one or another scenario will cause a different inflow of hydrocarbons from the generation area, which means that regional tectonic movements largely predetermine the realization of the hydrocarbon potential, making them one of the most important criteria for its assessment.

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3

Sprigg, Reg. "The Adelaide Geosyncline: A Century of Controversy." Earth Sciences History 5, no. 1 (January 1, 1986): 66–83. http://dx.doi.org/10.17704/eshi.5.1.c5rn11w3001t50j1.

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Late Proterozoic (Adelaidean) to Late Cambrian sediments of the Adelaide Geosyncline form a mountainous backbone to South Australia. Geological studies of the region date back to the beginning of European exploration and colonisation, although these were limited until the 1940s due to the small, isolated nature of the geological community. No detailed understanding of this extensive region emerged until the beginning of the twentieth century when sections were measured and the significance of widespread Late Precambrian glaciation was recognised. The search for fossils has been long and often unsuccessful. Trilobites and archaeocyatha, which were later determined as Cambrian, were found as early as 1879. The internationally famous Ediacara fauna was discovered in 1946. Unusual piercement structures containing breccias were only widely mapped after World War Two with a diapiric origin being proposed in 1960. In 1952, the province was classified as basically miogeo-synclinal with a late stage eugeosyncline in the southeast. This has recently been reinterpreted in terms of plate tectonics.

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4

Wang, L. J., and F. H. Chamalaun. "A magnetotelluric traverse across the Adelaide geosyncline." Exploration Geophysics 26, no. 4 (September 1995): 539–46. http://dx.doi.org/10.1071/eg995539.

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5

Huang, T. K. "On the Migration of The Tsinling Geosyncline." Bulletin of the Geological Society of China 10, no. 1 (May 29, 2009): 53–70. http://dx.doi.org/10.1111/j.1755-6724.1931.mp10001004.x.

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6

Sennikov, Nikolay, Alexandr Kanygin, Alexandr Timokhin, Nadezhda Izokh, Olga Obut, and Yuri Philippov. "NEW STRATIGRAPHIC UNITS OF THE UPPER ORDOVIKIN THE FUNDAMENTAL OF THE WESTERN SIBERIAN GEOSINELCLYSIS." Interexpo GEO-Siberia 2, no. 1 (2019): 177–82. http://dx.doi.org/10.33764/2618-981x-2019-2-1-177-182.

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Recent data on the Ordovician biostratigraphy of the West-Siberian Geosyncline are discussed. The new Regional unit - Pavlov Horizon and two new local sequences – Zapadno-Novogodnyaya Unit and Lekosskaya Unit were defined.

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7

Lambert, Ian B., Janice Knutson, T. H. Donnelly, and H. Etminan. "Stuart Shelf-Adelaide Geosyncline copper province, South Australia." Economic Geology 82, no. 1 (February 1, 1987): 108–23. http://dx.doi.org/10.2113/gsecongeo.82.1.108.

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8

WHITE, Antony, and P. R. MILLTGAN. "Geomagnetic variations across the southern Adelaide Geosyncline, South Australia." Journal of geomagnetism and geoelectricity 37, no. 7 (1985): 715–28. http://dx.doi.org/10.5636/jgg.37.715.

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9

KIMURA, Toshio. "The Chichibu geosyncline. The developments of the Japanese Islands. I." Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences 62, no. 10 (1986): 385–87. http://dx.doi.org/10.2183/pjab.62.385.

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10

Walter, M. R. "The Adelaide Geosyncline: Late proterozoic stratigraphy, sedimentation, palaeontology and tectonics." Precambrian Research 49, no. 3-4 (February 1991): 373–74. http://dx.doi.org/10.1016/0301-9268(91)90042-9.

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11

LEITCH, E. "The Adelaide Geosyncline: Late proterozoic stratigraphy, sedimentation, palaeontology and tectonics." Earth-Science Reviews 27, no. 4 (June 1990): 370–71. http://dx.doi.org/10.1016/0012-8252(90)90059-5.

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12

KOBAYASHI, Teiichi. "Relation between the Silurian trilobites of Japan and the Mongolian geosyncline." Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences 64, no. 4 (1988): 81–84. http://dx.doi.org/10.2183/pjab.64.81.

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13

BORCH, C. C., A. E. GRADY, K. H. EICKHOFF, P. DIBONA, and N. CHRISTIEBLICK. "Late Proterozoic Patsy Springs Canyon, Adelaide Geosyncline: submarine or subaerial origin?" Sedimentology 36, no. 5 (October 1989): 777–92. http://dx.doi.org/10.1111/j.1365-3091.1989.tb01746.x.

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14

Yolkin, E. A., A. E. Kontorovich, N. K. Bakharev, S. Yu Belyaev, A. I. Varlamov, N. G. Izokh, A. V. Kanygin, et al. "Paleozoic facies megazones in the basement of the West Siberian geosyncline." Russian Geology and Geophysics 48, no. 6 (June 2007): 491–504. http://dx.doi.org/10.1016/j.rgg.2007.06.010.

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15

GOSTIN, V. A., P. W. HAINES, R. J. F. JENKINS, W. COMPSTON, and I. S. WILLIAMS. "Impact Ejecta Horizon Within Late Precambrian Shales, Adelaide Geosyncline, South Australia." Science 233, no. 4760 (July 11, 1986): 198–200. http://dx.doi.org/10.1126/science.233.4760.198.

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16

Gehling, James G., and Mary L. Droser. "Ediacaran stratigraphy and the biota of the Adelaide Geosyncline, South Australia." Episodes 35, no. 1 (March 1, 2012): 236–46. http://dx.doi.org/10.18814/epiiugs/2012/v35i1/023.

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17

Greenhalgh, S. A., C. C. von der Borch, and D. Tapley. "Explosion seismic determination of crustal structure beneath the Adelaide Geosyncline, South Australia." Physics of the Earth and Planetary Interiors 58, no. 4 (December 1989): 323–43. http://dx.doi.org/10.1016/0031-9201(89)90103-9.

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18

Borch, C. C. von der, N. Christie‐Blick, and A. E. Grady. "Depositional sequence analysis applied to Late Proterozoic Wilpena Group, Adelaide Geosyncline, South Australia." Australian Journal of Earth Sciences 35, no. 1 (March 1988): 59–72. http://dx.doi.org/10.1080/08120098808729439.

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19

Eapaea, Miro Peter, David Parry, and Barry Noller. "Dynamics of arsenic in the mining sites of Pine Creek Geosyncline, Northern Australia." Science of The Total Environment 379, no. 2-3 (July 2007): 201–15. http://dx.doi.org/10.1016/j.scitotenv.2007.03.017.

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20

Preiss, W. V. "The Adelaide Geosyncline of South Australia and its significance in Neoproterozoic continental reconstruction." Precambrian Research 100, no. 1-3 (March 2000): 21–63. http://dx.doi.org/10.1016/s0301-9268(99)00068-6.

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21

Fromhold, T. A., and M. W. Wallace. "Nature and significance of the Neoproterozoic Sturtian–Marinoan Boundary, Northern Adelaide Geosyncline, South Australia." Australian Journal of Earth Sciences 58, no. 6 (August 2011): 599–613. http://dx.doi.org/10.1080/08120099.2011.579624.

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22

Kontorovich, V. A., and A. E. Kontorovich. "Geological structure and petroleum potential of the Kara Sea shelf." Доклады Академии наук 489, no. 3 (November 29, 2019): 272–76. http://dx.doi.org/10.31857/s0869-56524893272-276.

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On the Kara Sea shelf, there are two sedimentary basins separated by the North-Siberian sill. Tectonically the southern part of the Kara Sea covers the South Kara regional depression, which is the northern end of the West Siberian geosyncline. This part of the water area is identified as part of the South Kara oil and gas region, within which the Aptian-Albian-Senomanian sedimentary complex is of greatest interest in terms of gas content, in terms of liquid hydrocarbons - Neocomian and Jurassic deposits. The northern part of the Kara Sea is an independent North Kara province, for the most part of which the prospects of petroleum potential are associated with Paleozoic sedimentary complexes. Oil and gas perspective objects of this basin may be associated with anticlinal, non-structural traps and reef structures.

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23

Fromhold, T. A., and M. W. Wallace. "Regional recognition of the Neoproterozoic Sturtian–Marinoan boundary, Northern and Central Adelaide Geosyncline, South Australia." Australian Journal of Earth Sciences 59, no. 4 (June 2012): 527–46. http://dx.doi.org/10.1080/08120099.2012.673507.

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24

Ahmad, M. "The origin of tin deposits in the Mount Wells region, Pine Creek Geosyncline, Northern Territory." Australian Journal of Earth Sciences 40, no. 5 (October 1993): 427–43. http://dx.doi.org/10.1080/08120099308728094.

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25

Etheridge, Michael A. "Adelaide Geosyncline and Stuart Shelf: Precambrian and Palaeozoic Geology (with Special Reference to the Adelaidean)." Precambrian Research 33, no. 4 (October 1986): 342–44. http://dx.doi.org/10.1016/0301-9268(86)90051-3.

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26

Gostin, Victor A., David M. McKirdy, Lynn J. Webster, and George E. Williams. "Chapter 66 Mid-Ediacaran ice-rafting in the Adelaide Geosyncline and Officer Basin, South Australia." Geological Society, London, Memoirs 36, no. 1 (2011): 673–76. http://dx.doi.org/10.1144/m36.66.

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27

Williams, Douglas F., and Ian Lerche. "Hydrocarbon Production in the Gulf Coast Region from Organic-Rich Source Beds of Ancient Intraslope Basins." Energy Exploration & Exploitation 5, no. 3 (June 1987): 199–218. http://dx.doi.org/10.1177/014459878700500303.

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We have recently presented an empirical model to explain how low oxygen levels in intraslope basins of the northwestern Gulf of Mexico have been a common mechanism for the accumulation of sediments with significantly increased amounts of marine organic carbon. In that model (Model I) progadation of the shelf-slope and regional salt tectonics were invoked to control the occurrence and stratigraphic distribution of source beds throughout the Tertiary of the Gulf of Mexico. In turn, the maturation history of these organic-rich sediments is influenced by the high thermal conductivity of the underlying salt structures. In Model II, the topic of this paper, we use random number theory to suggest that the occurrence of organic-rich black muds in intraslope basins of the northwestern Gulf of Mexico had sufficient capacity to more than account for the known oil and gas reserves in sediments of the Gulf Coast Geosyncline.

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28

Rajagopalan, Shanti, Phillip Schmidt, and David Clark. "Rock magnetism, geologic history and aeromagnetic anomalies: A case study of the Ulupa Siltstone, Adelaide Geosyncline." ASEG Extended Abstracts 2003, no. 2 (August 2003): 1. http://dx.doi.org/10.1071/aseg2003ab137.

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29

Sun, Y. C. "The Sino-Burmese Geosyncline of Early Palaeozoic Time With Special Reference to its Extent and Character." Bulletin of the Geological Society of China 25, no. 1 (June 1, 2009): 1–7. http://dx.doi.org/10.1111/j.1755-6724.1945.mp25001001.x.

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30

BORCH, C. C., A. E. GRADY, R. ALDAM, D. MILLER, R. NEUMANN, A. ROVIRA, and K. EICKHOFF. "A large-scale meandering submarine canyon: outcrop example from the late Proterozoic Adelaide Geosyncline, South Australia." Sedimentology 32, no. 4 (August 1985): 507–18. http://dx.doi.org/10.1111/j.1365-3091.1985.tb00467.x.

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31

Ewers, G. R., R. S. Needham, P. G. Stuart‐Smith, and I. H. Crick. "Geochemistry of the low‐grade Early Proterozoic sedimentary sequence in the Pine Creek Geosyncline, Northern Territory." Australian Journal of Earth Sciences 32, no. 2 (June 1985): 137–54. http://dx.doi.org/10.1080/08120098508729320.

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32

Dickson, B. L., B. L. Gulson, and A. A. Snelling. "Further assessment of stable lead isotope measurements for uranium exploration, Pine Creek Geosyncline, Northern Territory, Australia." Journal of Geochemical Exploration 27, no. 1-2 (October 1987): 63–75. http://dx.doi.org/10.1016/0375-6742(87)90005-7.

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33

Williams, G. E., and P. W. Schmidt. "Low paleolatitude for the late Cryogenian interglacial succession, South Australia: paleomagnetism of the Angepena Formation, Adelaide Geosyncline." Australian Journal of Earth Sciences 62, no. 2 (February 17, 2015): 243–53. http://dx.doi.org/10.1080/08120099.2015.1003967.

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34

Ahmad, M. "Genesis of tin and tantalum mineralization in pegmatites from the Bynoe area, Pine Creek Geosyncline, Northern Territory." Australian Journal of Earth Sciences 42, no. 5 (October 1995): 519–34. http://dx.doi.org/10.1080/08120099508728222.

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35

Lottermoser, B. G., and P. M. Ashley. "Geochemistry, petrology and origin of Neoproterozoic ironstones in the eastern part of the Adelaide Geosyncline, South Australia." Precambrian Research 101, no. 1 (May 2000): 49–67. http://dx.doi.org/10.1016/s0301-9268(99)00098-4.

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36

Zagorchev, Ivan. "Kraishtides (Kraištiden) 70 years later: Myth or Reality?" Geologica Balcanica 35, no. 3-4 (December 30, 2006): 63–90. http://dx.doi.org/10.52321/geolbalc.35.3-4.63.

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The notion of Kraishtides underwent considerable transformations during 70 years since its introduction in the tectonic nomenclature of the Balkan Peninsula. Initially it was introduced for the allegedly youngest (Early Miocene) fold and thrust (orogenic) zone (Krajštiden) situated obliquely to Balkanides and South Carpathians. This notion evolved into a fault belt composed of normal faults that were transformed into reverse faults (Krajštiden-Lineament), and in a lineament-geosynclinal zone (Kraishtid lineament-geosyncline) of repeated opening (in latest Jurassic, Palaeogene and Neogene times) of basins of rift character, and following (“Austrian”, “Pyrenean” and “Savian”) compression and closures. All these meanings of the term may be regarded as redundant now. They are inconsistent with the modern knowledge about the geological structure and evolution of the region, and do not fit the modern tectonic ideas. Only the term “Kraishtid (Strouma) Lineament” could be preserved as a synonym to “Strouma (Kraishtid) fault belt”. However, the word “Kraishtid (Krajštiden)” refers to an orogenic belt (zone), and cannot be preserved as a toponym of fault belt. “Kraishtides” are neither a structural zone with a definite characteristics. The structure of SW Bulgaria is a peculiar mosaic of fold zones and blocks. In the Late Jurassic – Early Cretaceous palaeogeodynamic setting, a part of this area was the westernmost part of the Nish-Troyan flysch trough whereas South of it, the largest area belonged to an uplifted “plateau”. In mid-Cretaceous times (Aptian – Albian), the “Austrian” orogenesis led to the closure of the relics of the flysch trough, and the formation of the complex Morava-Rhodope (Macedonian-Rhodope) zone (in its westernmost part composed of the Morava, Strouma, and Ograzhden units). In Late Cretaceous times, the whole Morava-Rhodope zone represented an area of thickened continental crust (elevated frontal arc, “plateau”) whereas North of it, the Srednogorie volcanic arc and see was opened. In Palaeogene times, the whole Morava-Rhodope zone was again a volcanic island arc with a WNW-ESE trend. Only in Palaeogene and Neogene times, the Strouma (Kraishtid) lineament played the role of a fault belt with considerable dextral strike-slip movements, and repeating rifting in transtensional conditions.

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37

PIETSCH, B., and C. EDGOOSE. "The stratigraphy, metamorphism and tectonics of the Early Proterozoic Litchfield Province and western Pine Creek Geosyncline, Northern Territory." Precambrian Research 40-41 (October 1988): 565–88. http://dx.doi.org/10.1016/0301-9268(88)90085-x.

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38

GUERIN, GREG R., and ANDREW J. LOWE. "Multi-species distribution modelling highlights the Adelaide Geosyncline, South Australia, as an important continental-scale arid-zone refugium." Austral Ecology 38, no. 4 (June 20, 2012): 427–35. http://dx.doi.org/10.1111/j.1442-9993.2012.02425.x.

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39

MASLYAEV, A. V. "Settlements on the Peri-Caspian Geosyncline Were Built Without TakingInto Account the Active Tectonic Processes Taking Place in it." Zhilishchnoe Stroitel'stvo, no. 8 (2021): 44–52. http://dx.doi.org/10.31659/0044-4472-2021-8-44-51.

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40

Dentith, Mike, and Robert Stuart. "Sediment-hosted stratiform copper deposits in the Adelaide Geosyncline, South Australia: Geophysical responses of mineralisation and the mineralised environment." ASEG Extended Abstracts 2003, no. 3 (December 2003): 169–96. http://dx.doi.org/10.1071/asegspec12_14.

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41

Setyawan, Reddy, Abdurrahman Hakim, Afif Sulestianson, Alfa Aulia Satria Bagaskara, Fitria Febyani, Hasbi As-Sidiqi Sutandiono, Kristian Jhonson Napitupulu, and Nurjayanti Nurjayanti. "Variasi dan Sebaran Litologi Batugamping di Kecamatan Todanan, Kabupaten Blora, Jwa Tengah." Jurnal Geosains dan Teknologi 3, no. 1 (March 31, 2020): 42. http://dx.doi.org/10.14710/jgt.3.1.2020.42-51.

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Daerah Todanan merupakan salah satu wilayah di Kabupaten Blora. Todanan merupakan wilayah dataran perbukitan landai yang secara geologi masuk ke dalam Zona Rembang. Zona Rembang merupakan bagian dari cekungan sedimentasi Jawa Timur bagian utara (East Java Geosyncline). Cekungan ini terbentuk pada Oligosen Akhir yang berarah Timur. Tujuan dilakukan penelitian ini adalah untuk mengetahui variasi litologi batugamping, umur dan fasies dari batugamping yang diharapkan dapat memperkaya pengetahuan geologi di lokasi ini. Metode penelitian yang digunakan adalah observasi lapangan untuk mendapatkan data variasi litologi. Sampel batuan yang didapatkan dari lapangan selanjutnya dilakukan analisis petrografi dan mikrofosil. Hasil dari observasi di lapangan, dapat diketahui kondisi geomorfologi, variasi litologi dan kondisi struktur geologi di lokasi penelitian. Geomorfologi lokasi penelitian terbagi menjadi Dataran Landai Denudasional, Bergelombang Miring Denudasional, Berbukit Bergelombang Karst, Bergelombang Miring Struktural Karst, Bergelombang Miring Struktural Lembah Sinklin, dan Bergelombang Miring Struktural Bukit Antiklin. Struktur geologi cukup sulit dilakukan di lapangan, karena sebagian besar area di lokasi penelitian tertutup oleh hutan jati, sawah, dan pemukiman. Variasi litologi yag ditemukan di lapangan adalah Satuan Batupasir Karbonatan, Satuan Batugamping Kalkarenit, Satuan Lempung Karbonatan, Satuan Batugamping Wackestone, Satuan Batugamping Grainstone, dan Satuan Batugamping Packestone. Satuan litologi Wackestone, Grainstone dan Packestone terendapkan di fasies fore reef.

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42

Guerin, Greg R., Haixia Wen, and Andrew J. Lowe. "Leaf morphology shift linked to climate change." Biology Letters 8, no. 5 (July 4, 2012): 882–86. http://dx.doi.org/10.1098/rsbl.2012.0458.

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Climate change is driving adaptive shifts within species, but research on plants has been focused on phenology. Leaf morphology has demonstrated links with climate and varies within species along climate gradients. We predicted that, given within-species variation along a climate gradient, a morphological shift should have occurred over time due to climate change. We tested this prediction, taking advantage of latitudinal and altitudinal variations within the Adelaide Geosyncline region, South Australia, historical herbarium specimens ( n = 255) and field sampling ( n = 274). Leaf width in the study taxon, Dodonaea viscosa subsp. angustissima , was negatively correlated with latitude regionally, and leaf area was negatively correlated with altitude locally. Analysis of herbarium specimens revealed a 2 mm decrease in leaf width (total range 1–9 mm) over 127 years across the region. The results are consistent with a morphological response to contemporary climate change. We conclude that leaf width is linked to maximum temperature regionally (latitude gradient) and leaf area to minimum temperature locally (altitude gradient). These data indicate a morphological shift consistent with a direct response to climate change and could inform provenance selection for restoration with further investigation of the genetic basis and adaptive significance of observed variation.

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Schmidt, Phillip W., Brian J. J. Embleton*, and George E. Williams. "Early Timing of Remanence in Haematite of the Neoproterozoic Elatina Formation, Adelaide Geosyncline: Confirmation of the Low Palaeolatitude of Neoproterozoic Glaciation." Exploration Geophysics 24, no. 2 (June 1993): 239–42. http://dx.doi.org/10.1071/eg993239.

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Durham, J. W. "Observations on the Early Cambrian helicoplacoid echinoderms." Journal of Paleontology 67, no. 4 (July 1993): 590–604. http://dx.doi.org/10.1017/s0022336000024938.

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The Early Cambrian helicoplacoid echinoderms occur in the Cordilleran Geosyncline of western North America in strata correlated with the Atdabanian Stage of Siberia. Several higher taxa are recognized on the basis of inferred differences in the water vascular system, test organization, and external morphology. These are subclass Polyplacida Durham, with genus Polyplacus Durham; subclass Helicoplacida Durham and Caster, with n. family Helicoplacidae, type genus Helicoplacus Durham and Caster (with tubefeet emerging between two contemporaneous ambulacral plates); n. family Westgardellidae, with type n. genus Westgardella, type species H. curtisi (Durham and Caster) (with tubefeet emerging between two sequential ambulacral plates). The genus Waucobella Durham is also referred to Westgardellidae. Helicoplacus gilberti Durham and Caster, H. everndeni Durham, H. casteri n. sp., H. guthi n. sp., H. sp. a, and H. sp. b are assigned to Helicoplacidae. The genus Westgardella includes H. firbyi Durham, 1967, and W. blancoensis n. sp., in addition to the type species. No evidence of flooring plates separating the radial water vessel from the interior of the test is recognized. The mouth is at the top of the test in the interpretation adopted herein and not lateral as inferred by others; therefore, the ambulacral system is not triradiate. Illustration identified as Helicoplacus curtisi by Paul and Smith includes misidentified plates and should not be referred to this species.

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Foden, J. "Sr-isotopic evidence for Late Neoproterozoic rifting in the Adelaide Geosyncline at 586 Ma: implications for a Cu ore forming fluid flux." Precambrian Research 106, no. 3-4 (March 1, 2001): 291–308. http://dx.doi.org/10.1016/s0301-9268(00)00132-7.

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46

Hoffman, Paul F., Samuel A. Bowring, Robert Buchwaldt, and Robert S. Hildebrand. "Birthdate for the Coronation paleocean: age of initial rifting in Wopmay orogen, CanadaThis article is one of a series of papers published in this Special Issue on the theme of Geochronology in honour of Tom Krogh." Canadian Journal of Earth Sciences 48, no. 2 (February 2011): 281–93. http://dx.doi.org/10.1139/e10-038.

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The 1.9 Ga Coronation “geosyncline” to the west of Slave craton was among the first Precambrian continental margins to be identified, but its duration as a passive margin has long been uncertain. We report a new U–Pb (isotope dilution – thermal ionization mass spectrometry (ID–TIMS)) 207Pb/206Pb date of 2014.32 ± 0.89 Ma for zircons from a felsic pyroclastic rock at the top of the Vaillant basalt, which underlies the passive margin sequence (Epworth Group) at the allochthonous continental slope. A sandstone tongue within the basalt yields Paleoproterozoic (mostly synvolcanic) and Mesoarchean detrital zircon dates, of which the latter are compatible with derivation from the Slave craton. In contrast, detrital zircon grains from the Zephyr arkose in the accreted Hottah terrane have Paleoproterozoic and Neoarchean dates. The latter cluster tightly at 2576 Ma, indistinguishable from igneous zircon dates reported here from the Badlands granite, which is faulted against the Vaillant basalt and underlying Drill arkose. We interpret these data to indicate that Badlands granite belongs to the hanging wall of the collisional geosuture between Hottah terrane and the Slave margin, represented by the Drill–Vaillant rift assemblage. If 2014.32 ± 0.89 Ma dates the rift-to-drift transition and 1882.50 ± 0.95 Ma (revised from 1882 ± 4 Ma) the arrival of the passive margin at the trench bordering the Hottah terrane, the duration of the Coronation passive margin was ∼132 million years, close to the mean age of extinct Phanerozoic passive margins of ∼134 million years (see Bradley 2008).

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Harland, W. Brian. "Chapter 14 Cambrian-Ordovician history." Geological Society, London, Memoirs 17, no. 1 (1997): 257–71. http://dx.doi.org/10.1144/gsl.mem.1997.017.01.14.

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Cambrian-Ordovician history is well documented in Svalbard with late Early Cambrian faunas and a range of Ordovician faunas to provide a basis for correlation. Not so extensive as Vendian, the rocks crop out in four areas: (i) only slightly deformed strata in the youngest Hecla Hoek (Oslobreen) Group in northeastern Svalbard yield especially rich Early to Mid-Ordovician faunas, (ii) The Hornsundian Geosyncline in south Spitsbergen with more variable facies and tectonic complications also exhibits Early Cambrian and Canadian strata, (iii) The Bjornoya succession reveals a marked hiatus between Vendian and Early and Mid-Ordovician strata, (iv) In western Svalbard the lack of Cambrian and Early Ordovician strata marks a distinct Mid Ordovician tectono-thermal event to be followed by ?Late Ordovician and Early Silurian strata. Indeed the above four areas correspond to distinct terranes which, having different affinities especially with areas in Greenland, give evidence of relatively distant areas and environments of formation. Evidence of Cambro-Ordovician volcanism is not recorded.Figure 14.1 lists the successions in the four areas mentioned according to the classification of rock units as abstracted from chapters 6, 7, 8, 9, 10 and 11, where their regional settings may be found. The outcrops are plotted on Fig. 14.2. The northeastern Svalbard strata are separated by Hinlopenstretet. This waterway divides Ny Friesland and Olav V Land in Spitsbergen from northwestern Nordaustlandet and occupies a syncline, but the successions although differently named are essentially continuous. In southern Spitsbergen the fjord Hornsund separates the successions to the south in Sorkapp Land

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Hassler, Scott W., and Bruce M. Simonson. "Deposition and alteration of volcaniclastic strata in two large, early Proterozoic iron-formations in Canada." Canadian Journal of Earth Sciences 26, no. 8 (August 1, 1989): 1574–85. http://dx.doi.org/10.1139/e89-134.

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The Gunflint Iron-formation of western Ontario and the Sokoman Iron-formation of the Labrador–Quebec geosyncline both contain interbeds of coarse-grained volcaniclastic detritus. Volcaniclastic beds in the Gunflint are typically less than a metre thick and display normal grading and other physical structures typical of high- and low-density turbidites. Similar volcaniclastic beds are present in the Sokoman, as well as thicker accumulations with structures indicative of deposition from high-density turbidity currents. The volcaniclastic detritus in both iron-formations consists largely of well-sorted vitric ash and lapilli with accessory holocrystalline grains and solitary feldspar crystals. Internal textures of the vitric grains, plus the presence of armored lapilli in the Gunflint, suggest they are products of hydroclastic eruptions. However the clasts in most beds are heterogeneous and well-rounded, indicating they are sedimentary rather than eruptive deposits. Quench textures, coalesced vesicles, and diabasic textures indicate that the volcaniclastics were originally basaltic in composition, but the rocks have been pervasively altered to iron-rich chlorite, calcite, and K-feldspar (Or98 Ab2 An0) with minor quartz and illite. In addition to being pseudomorphs after the original volcaniclastic textures within grains, these minerals also occur as interstitial and vesicle-filling cements. Fibrous rims of chlorite and poikilotopic to blocky calcite are the most abundant cement types. Cementation commenced early, inasmuch as some zones show little evidence of compaction. Patterns of cementation and alteration may indicate that geothermal gradients in such iron-formation basins were steeper than they are in the most closely comparable modern settings, namely passive margins.

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López-Gamundí, O. R., and E. A. Rossello. "Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: the Sauce Grande basinVentana foldbelt (Argentina) and Karoo basinCape foldbelt (South Africa) revisited." Geologische Rundschau 86, no. 4 (January 26, 1998): 819–34. http://dx.doi.org/10.1007/s005310050179.

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50

Spahic, Darko. "The birth of the Sava Suture Zone: The early geological observations and the context of bimodal magmatism (southern Belgrade outskirts; Andjelkovic, 1973)." Annales g?ologiques de la Peninsule balkanique, no. 00 (2022): 4. http://dx.doi.org/10.2298/gabp220404004s.

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This paper presents one of the significant results of the research of Prof. Dr. Milodrag Andjelkovic. The study underlines the first field record providing the evidence of the Upper Cretaceous bimodal magmatism that evetually led towards the definition of the Late Cretaceous "Sava-Vardar Zone" in 2002 (Pamic, 2002). Now, the 20-years old "Sava-Vardar Zone" i.e., the Sava Suture Zone regarded as a crustal assembly formerly intervening the amalgamated Adria and south Eurasian affinities. The pioneering field mapping-based observations contributing the debuted Sava Suture Zone, are in the underestimated report of Prof. Dr. Milodrag Andjelkovic, presenting his observations of the typifying Late Cretaceous bimodal magmatism (published in 1973 in the regional XIX-century established journal, Annales geologiques de la peninsule Balkanique" Title: "Geologija mezozoika okoline Beograda", translated: The geology of Mesozoic assembly: vicinity of the Belgrade area). In that t ime, during early 1970?s, the entire geoscience community of former Yugoslavia for a long t ime denying any Late Cretaceous magmatism within the Vardar Zone, offering a counterargument grounded onto the geosyncline tectonic framework. The 1973 paper was published much prior the constraints on the Late Cretaceous bimodal magmatic intrusions, discussed as the "Peri Adriatic Sava magmatic arc" or Peri Adriatic Lineament, but only three decades later. The Andjelkovic?s 1973 report represents the first published record, interpreting a number of the Late Cretaceous bimodal magmatic mini-occurrences distributed in the modern-day Sava Suture Zone belt. Despite using the previous tectonic model, the often-neglected descriptions of the Jurassic-Late Cretaceous biostratigraphy and their spatial relationship with the confined magmatic entities, allow the important correlation of a number of Late Cretaceous smallscale basins, positioned to the northwest (Bosnia & Herzegovina, Croatia), and to the south of Belgrade (Central Serbia, North Macedonia). The understanding of this suture zone, bending in the vicinity of Belgrade, is of primary importance, providing the characterization of the terminal Alpine collisional mechanism in the area.

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