Detrital rutile U-Pb perspective on the origin of the great Cambro-Ordovician sandstone of North Gondwana and its linkage to orogeny

Avigad, Dov; Morag, Navot; Abbo, Avishai; Gerdes, Axel

doi:10.1016/j.gr.2017.07.001

Cited by 51 publications

(31 citation statements)

References 90 publications

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“…The Tazekka glacigenic deposits essentially derived from the cannibalization of the "great Lower Paleozoic quartz-rich sandstone sheet", itself initially having recycled the Pan-African molasse and flysch basins (Avigad et al, 2017), rather than recording a pulse of fresh, far-travelled, first-cycle clastic sediments issuing from basement rocks. This finding is in line with conclusions of Chatalov (2017) and Gärtner et al (2017), also dealing with the north Gondwana area but is in contrast with common views about the limited maturity of syn-glaciation deposits (Nesbitt and Young, 1982;Yan et al, 2010;Bahlburg and Dobrzinski, 2011;Huang et al 2014).…”

Section: Discussionmentioning

confidence: 99%

“…For instance, the massive arrival of >2.3 Ga zircon grains that has been detected in the Upper Ordovician strata of the ice-proximal reaches of the glaciated platform in the southern Hoggar (Linnemann et al, 2011) might be a consequence of the reorganization of sediment dispersal trends owing to glaciation. Actually, the degree to which the end-Ordovician glaciation impinged on the Paleozoic dispersal systems of the Gondwana remains unknown (Avigad et al, 2012(Avigad et al, , 2017.…”

Section: Introductionmentioning

confidence: 99%

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The impact of the end-Ordovician glaciation on sediment routing systems: A case study from the Meseta (northern Morocco)

et al. 2018

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Assessment of sediment redistribution by end-Ordovician ice sheets is crucial for the reconstruction of Lower Paleozoic source-to-sink patterns. Focussing on the ice-distal, deepwater Tazekka depocenter (Moroccan Meseta), we thus performed a provenance study that combined whole-rock geochemistry, petrography and insights from highresolution detrital zircon ages. The results show that the glacigenic sediments are compositionally-mineralogically and geochemically-more mature than preglacial strata. This observation points to a preferential cannibalization of the "great Lower Paleozoic quartz-rich sandstone sheet", with a limited input of first-cycle, far-travelled clastic sediments. Differentiation of glacial units is not straightforward, yet the glaciation acme is typified by a highly mature sedimentary source and an age spectrum lacking Mesoproterozoic zircon grains, both features strongly indicating derivation from the Cambrian-Lower Ordovician cover of the Tuareg Shield. More regional sources are expressed during the earlier glaciation stages, during which lowstand remobilisations unrelated to subglacial erosion are also suspected. Subordinate but notable late Tonian (∼ 0.8 Ga) and latest Stenian to early Tonian (∼1 Ga) zircon populations are also evidenced in Morocco, which may have implications for future paleogeographic reconstructions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The impact of the end-Ordovician glaciation on sediment routing systems: A case study from the Meseta (northern Morocco)

et al. 2018

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“…The Phanerozoic evolution of the former Yugoslavia and SEE can beyond question be qualified as one of the most intricate in global scale, as it goes back to (i) the Late Neoproterozoic Cadomian orogeny (e.g., ANTIĆ et al, 2016;AVIGAD et al, 2017), (ii) subsequent Neoproterozoic-Early Paleozoic peri-Gondwanan wrenching (e.g., MERDITH et al, 2017) coupled with the (iii) subduction-related back-arc extension (NANCE & LINNEMANN, 2008). These Early Paleozoic events are superseded by the two major orogenic imprints -Variscan and Alpine.…”

Section: Discussionmentioning

confidence: 99%

Neoproterozoic-paleozoic evolution of the Drina formation (Drina-Ivanjica entity)

Spahić¹,

Glavaš-Trbić²,

Đajić³

et al. 2018

Geol An Balk Poluos

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This paper addresses a Drina-Ivanjica basement member, Drina Formation, characterized by ŕ controversial Neoproterozoic to Carboniferous age. The Drina Formation is also informally referred to as the "Lower Drina Formation" and the "Upper Drina Formation" including the Golija Formation as a conditional analog unit of the latter. A review of the biostratigraphic, sedimentary and paleogeographic constraints identified Drina Formation (Inner Dinarides) as a migrated crustal segment derived from a marginal section of northern Gondwana, being, however, of Neoproterozoic-Early Paleozoic age.The presence of arenites, pelites, conglomerates, scarce limestones, basic (sub)volcanics and tuffs of the volcano-sedimentary Drina Formation metamorphosed up to greenschist and locally up to amphibolite facies, coupled with the absence of felsic volcanism implies a passive margin setting. Considering the age, such environment was probably associated with the perplexed Lower Paleozoic Avalonian-Cadomian arc, situated along the former north Gondwanan active margin. More precisely, the Drina Formation originated from a depositional junction between the Gondwana sediment supplier (Sahara metacraton) and Cadomian arc. A comparison with the regional Early Paleozoic succession of the "Kučaj Unit" (eastern Serbia) yields the absence of typical anchimetamorphic Silurian to Lower Devonian deep-marine fossil-bearing succession. The volcano-sedimentary passive margin system of Drina Formation is overlain by a late Variscan convergencerelated voluminous clastic sequence allocated as the Golija Formation.Апстракт. Фокус овог рада је Дринска формација, део Дринско-ивањичког бејсмента контроверзне неопротерозојско-карбонске старости. Корелацијом биостратиграфских, палеогеографских и геодинамичких података изведени су закључци о неопротерозојско-ранопалеозојској старости Дринске формације, као дела некадашње северногондванске маргине.Присуство аренита, пелита, конгломерата, базичних (суб)вулканита и туфова као доминантних литотипова Дринске формације (уз нешто карбоната), метаморфисаних претежно у фацији зелених шкриљаца, а локално и у амфиболитској фацији, маркира сложене тектонске догађаје маргиналног дела северне Гондване. Средина настанка Дринске формације је вероватно била позиционирана између главне области ерозије тј. сахарског кратона и ободног кадомског лука (гондвански систем континенталних и вулканских лукова). Упоредном анализом са регионално метаморфисаном доњопалеозојском сукцесијом "Кучајске јединице" (источна Србија) уочава се одсуство (средње-и горњо-)ордовицијумских, силурских и доњодевонских творевина у метаморфитима Дринске формације, што упућује на највероватнији доњи ордовицијум као терминални период формирања протолита. Присуство измењених базичних стена, са друге стране, указује на реликте неопротерозојско -доњопалеозојског вулканогено-седиментног лучног система. Махом кластична доњокарбонска повлатна сукцесија тзв. Голијске формације маркира касноварисцијску (највероватније конвергентну) фазу развоја овог тектонски одвојен...

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“…A hypothetical binary mixing between the ANS and one of the above‐mentioned terranes could shed light on the proportions of sediment load between the ANS and the additional ancient non‐juvenile components. The isotopic compositions along with palaeogeographic considerations (Yonkee et al ., ; Avigad et al ., ), indicate that the Cambrian sediments comprise a mixture of ca 45% from terranes of the southern parts of the East African Orogen (for example, Tanzania, eastern Ethiopia or Somalia), south India (Möller et al ., ) or ca 70% from the eastern Saharan Metacraton (Harms et al ., ; Küster et al ., ; Ibinoof et al ., ). These estimates are in good agreement with Morag et al .…”

Section: Discussionmentioning

confidence: 99%

Provenance of the great Cambrian sandstone succession of northern Gondwana unravelled by strontium, neodymium and lead isotopes of feldspars and clays

2018

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The great Cambro-Ordovician sandstone succession of northern Gondwana is one of the most voluminous siliciclastic deposits on Earth. Its deposition took place following the Neoproterozoic Pan-African Orogeny and the consolidation of Gondwana, a crucial episode in Earth history. Its provenance is of great importance for reconstructing palaeogeographic and tectonic settings and determining sediment dispersal patterns. In Israel and its environs, Palaeozoic sandstones overlie the juvenile Neoproterozoic basement of the Arabian-Nubian Shield. These basement rocks were considered as an important sediment source to the Cambro-Ordovician succession. However, recent studies established that a dominant portion of detrital zircons in the succession was derived from Archean-Proterozoic remobilized terranes, suggesting transportation distances of thousands of kilometres beyond the Arabian-Nubian Shield, and thus question the provenance of other, less weatheringresistant constituents, which were not necessarily derived from the same localities. Feldspars and clays were separated from 13 samples and analyzed for mineralogical and geochemical compositions, strontium, neodymium and lead isotopes, in order to further constrain the provenance of the Cambro-Ordovician succession of northern Gondwana. Detrital feldspars have eNd values significantly different from feldspars of the Arabian-Nubian Shield, ranging from À8 to À14, with model ages of 950 to 1750 Ma, more radiogenic lead compositions, and l ( 238 U/ 204 Pb) values ranging from 9Á8 to 10Á26. Clays are dominated by illite, smectite and kaolinite, with eNd values ranging between À14 and À9, with 87 Sr/ 86 Sr ratios up to 0Á757. These findings point to a significant contribution of remote ancient terranes from outside the Arabian-Nubian Shield to the Cambro-Ordovician sandstone of northern Gondwana. The possible sources for these sediments are the Saharan Metacraton and the southern regions of the East African Orogen.

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Detrital rutile U-Pb perspective on the origin of the great Cambro-Ordovician sandstone of North Gondwana and its linkage to orogeny

Cited by 51 publications

References 90 publications

The impact of the end-Ordovician glaciation on sediment routing systems: A case study from the Meseta (northern Morocco)

The impact of the end-Ordovician glaciation on sediment routing systems: A case study from the Meseta (northern Morocco)

Neoproterozoic-paleozoic evolution of the Drina formation (Drina-Ivanjica entity)

Provenance of the great Cambrian sandstone succession of northern Gondwana unravelled by strontium, neodymium and lead isotopes of feldspars and clays

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