Alluvial fan and lacustrine sediments from the Stephanian A and B (La Magdalena, Ciñera—Matallana and Sabero) coalfields, northern Spain

Heward, Alan P.

doi:10.1111/j.1365-3091.1978.tb02076.x

Cited by 137 publications

(57 citation statements)

References 77 publications

(124 reference statements)

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“…These faults must have linked the surface with the aquifer that accommodated the hydrothermal groundwater. In addition, tectonic activity and fault-block uplift might have favoured the formation of gravity-flow fans, as reported in several studies (Heward, 1978;Blair, 1987;Neves et al, 2005;Leeder, 2009).…”

Section: Accepted M Manuscriptmentioning

confidence: 65%

Depositional architecture of a mixed travertine-terrigenous system in a fault-controlled continental extensional basin (Messinian, Southern Tuscany, Central Italy)

Croci

Porta

Capezzuoli

2016

Sedimentary Geology

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Highlights• Α facies analysis of continental carbonates and terrigenous deposits was conducted.• The interplay between hydrothermal travertines and alluvial/colluvial deposits was demonstrated.• The basin fill and depositional architecture of a continental extensional basin were studied.• Extrinsic factors controlling the evolution of the sedimentary succession were determined. ABSTRACTThe extensional Neogene Albegna Basin (Southern Tuscany, Italy) includes several thermogene travertine units dating from the Miocene to Holocene time. During the late Miocene (Messinian), a continental fault-controlled basin (of nearly 500-km 2 width) was filled by precipitated travertine and detrital terrigenous strata, characterized by a wedge-shaped geometry that thinned northward, with a maximum thickness of nearly 70 m. This mixed travertineterrigenous succession was investigated in terms of lithofacies types, depositional environment and architecture and the variety of precipitated travertine fabrics. The studied continental succession in an extensional basin provides valuable information about the interplay between thermogene travertine and alluvial/colluvial deposition, which in turn might improve the understanding of similar fault-controlled continental depositional systems in outcrops and the subsurface.

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Section: Accepted M Manuscriptmentioning

confidence: 65%

Depositional architecture of a mixed travertine-terrigenous system in a fault-controlled continental extensional basin (Messinian, Southern Tuscany, Central Italy)

Croci

Porta

Capezzuoli

2016

Sedimentary Geology

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“…The tractional activity of turbulent streamflows was perhaps important in its deposition. This deposit compares closely to streamflood deposits and probably occupied a distal alluvial fan environment (Bluck, 1967;Steel, 1974;Steel and Wilson, 1975;Heward, 1978;Nilsen, 1982). The overlying unstratified red conglomerate with erosional base and normal grading probably represents a braided river channel.…”

Section: Stratigraphic Section In Yumrutepe In the Karasu Valleymentioning

confidence: 99%

The Late Quaternary Tectono-Stratigraphic Evolution of the Lake Van, Turkey

Görür¹,

Çağatay²,

Zabcı³

et al. 2015

Bulletin of the Mineral Research and Exploration

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Many of the terraces around the Lake Van record a relatively short period of the much longer geological history of the Lake Van Basin. Their deposition took place during the last ca. 125 ka BP. They accumulated in a large array of shallow lake and lake margin environments, such as alluvial fan/braided river, beach, Gilbert-type delta, nearshore lake and offshore lake. Variability of their lithofacies provides evidence for climatic and tectonic controls of their depositional conditions. During their deposition high relief areas in the watershed delivered abundant detritus to the coastal areas of the lake. The sedimentation was therefore dominated by terrigenous clastic deposits. The highest concentrations of the coarse clastic sediments were at the mouths of the major streams where they formed Gilbert-type deltas. These river-dominated lacustrine deltas formed during rising lake levels and are relatively more abundant and thicker in the eastern margin of the lake, indicating that this margin mostly had a low-energy coast sheltered from the prevailing westerly winds. However, some areas of the same margin adjacent to deltas were also supplied with sediments by waves and storm-induced longshore currents to form beaches. Storms and storm-generated traction currents were perhaps active agents along the shores of the Lake Paleo-Van as suggested by the presence of the coarse-grained material in its nearshore facies. Somehow, during times of lake highstands, turbidity currents seem not to have played an important role in the sediment transportation along the lake margin, because the nearshore sediments hardly show any evidence of turbidite depositon, such as graded bedding and sole-marks. The offshore lake was relatively quite standing water, depositing laterally persistent, thinly-bedded to varved and fine-grained sandstones and mudstones in part with hydroplastic disruptions, such as slumps and convolute beddings. Because of the lack of sufficient datings of the terrace sequences around Lake Van, we cannot correlate them unequivocally. However, the absence of large-scale cyclicity within a given terrace sequence in each locality suggests that deposition of each terrace occurred during a separate lake level fluctuation each reaching to higher level than the modern lake level followed by a regression. The available age data suggest that high lake levels, reaching up to 1760 m asl, occurred during the last interglacial (MIS 5; 123-71 ka BP), 26-24 ka BP, 22-21 ka BP and 10-6 ka BP. The younging of the terrace deposits along with the decrease in elevation suggests either a gradual decline of lake level with time, or the effect of the cumulative uplift with time or both. The fluctuating lake level was probably due to a combination of climatic, volcanic and tectonic processes. Considering the hydrologically closed nature of the lake, climate probably played more important role than the others. Since the formation of the youngest terrace sediments of 6 ka BP, perhaps the climate in the basin has been mostly relatively more ar...

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“…Stratigraphic and sedimentological analysis of the Stephanian coalfields in the SCZ indicates that they probably represent part of a wider single depositional basin (Heward 1978;Wagner and Winkler-Prins 1985;Knight et al 2000). A totally eroded overburden related to coalification of the Stephanian rocks was deposited in the Late Stephanian or perhaps also in the Permian.…”

Section: Discussionmentioning

confidence: 99%

“…Over 2000 m of Stephanian A-B clastic sediments (conglomerates, sandstones, and shales with intercalated coal seams with tonsteins) were deposited unconformably on older Palaeozoic rocks in the Sabero Coalfield (Heward 1978;Knight 1983;Wagner and Winkler-Prins 1985;Knight et al 2000;Colmenero et al 2008). The Stephanian A strata contain about 20 coal seams and coal intercalations, whose thickness ranges from 0.3 to 2.0 m, and the Stephanian B strata contain over 50 coal seams and coal intercalations, with thicknesses between 0.1 and 3.5 m (Knight 1983;Knight et al 2000;Colmenero et al 2008).…”

Section: Geological Settingmentioning

confidence: 99%

Thermal history of the Sabero Coalfield (Southern Cantabrian Zone, NW Spain) as revealed by apatite fission track analyses from tonstein horizons: implications for timing of coalification

Botor

Anczkiewicz

2015

Int J Earth Sci (Geol Rundsch)

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Alluvial fan and lacustrine sediments from the Stephanian A and B (La Magdalena, Ciñera—Matallana and Sabero) coalfields, northern Spain

Cited by 137 publications

References 77 publications

Depositional architecture of a mixed travertine-terrigenous system in a fault-controlled continental extensional basin (Messinian, Southern Tuscany, Central Italy)

Depositional architecture of a mixed travertine-terrigenous system in a fault-controlled continental extensional basin (Messinian, Southern Tuscany, Central Italy)

The Late Quaternary Tectono-Stratigraphic Evolution of the Lake Van, Turkey

Thermal history of the Sabero Coalfield (Southern Cantabrian Zone, NW Spain) as revealed by apatite fission track analyses from tonstein horizons: implications for timing of coalification

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