Controlling factors and implications for travertine and tufa deposition in a volcanic setting

Rodríguez‐Berriguete, Álvaro; Alonso-Zarza, Ana María

doi:10.1016/j.sedgeo.2018.12.001

Cited by 22 publications

(28 citation statements)

References 48 publications

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“…9). The strontium isotope ratios clearly differ from those of the volcanic rocks and tufa/travertine deposits from Gran Canaria Island (Cousens et al, 1990;Ovchinnikova et al, 1995;Thirlwall et al, 1997;Abratis et al, 2002;Hansteen and Troll, 2003;Aulinas et al, 2010aAulinas et al, , 2010bRodríguez-Berriguete and Alonso-Zarza, 2019). Thus, weathering of the volcanic rocks or volcanic clasts was not the main calcium source.…”

Section: Controls On Calcrete Profile Distribution and Developmentmentioning

confidence: 84%

Unravelling calcrete environmental controls in volcanic islands, Gran Canaria Island, Spain

Alonso-Zarza

Rodríguez‐Berriguete

Martín-Pérez

et al. 2020

Palaeogeography, Palaeoclimatology, Palaeoecology

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Volcanic islands are unique contexts to analyze the controls on calcrete development in settings with varied relief, climate and vegetation, and lacking carbonate host rocks. This paper discusses the formation of Quaternary calcrete profiles in Gran Canaria volcanic Island, under direct influence of the SAL (Saharian Air Layer). Calcrete profiles are multi-storey and composed of prismatic, massive, laminar, pisolithic, ooid-bearing, sandy mudstones with rhizoliths and brecciated horizons. Host rocks include basalts, siliceous mudstones, volcanic sands and gravels and bioclastic-rich sands. Carbonate is mostly calcite but some dolomite occurs in massive horizons. The main microfabrics include laminated micrite, fine crystalline dolomite, desiccated micrite, micrite-clay groundmass, oriented Mg-rich clays, peloids, spherulites and coated grains. δ 13 C varies from −3.26 to −9.18‰ VPDB and δ 18 O from +0.86 to −3.24‰ VPDB. The 87 Sr/ 86 Sr ratios are between 0.707504 and 0.708860, indicating that calcium was mostly supplied from the CaCO 3-rich aeolian dust coming from the Sahara Desert. Calcrete profiles are mostly pedogenic with roots and microorganisms enabling carbonate precipitation within the soils. The correlation trend of δ 13 C and δ 18 O points to a climate control on precipitation, with the heavier isotope values in the horizons containing dolomite. Sedimentation rates interplayed with calcrete formation processes and erosion to outline the profiles/horizons. Amalgamated laminar horizons formed when the rate of calcrete formation was higher than sedimentation and erosion, whereas areas or periods with relatively higher sedimentation allowed the separation of calcrete horizons. The direction of the winds supplying aeolian dust, and the varied relief, vegetation and climate favored better development of calcretes in the relatively arid and lowland areas of the eastern side of the island. Our study shows that calcretes contain the record of the paleoenvironmental controls that operated in volcanic islands with no previous carbonate substrates.

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Section: Controls On Calcrete Profile Distribution and Developmentmentioning

confidence: 84%

Unravelling calcrete environmental controls in volcanic islands, Gran Canaria Island, Spain

Alonso-Zarza

Rodríguez‐Berriguete

Martín-Pérez

et al. 2020

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…Previously published U/Th datings from Azuaje deposits were used (Rodríguez‐Berriguete & Alonso‐Zarza, 2019). Additionally, 14 C dating in Azuaje and U/Th dating in Las Temisas were done, because it was not possible to obtain reliable datings due to the volcanic origin of the carbon (‘dead carbon’) and the huge amount and widespread distribution of siliciclastics within samples, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Location of Gran Canaria (Canary Islands) and of the three studied deposits (mdt+5, PNOA yielded by © National Geographic Institute). Sectorization of the island based on rock ages and climate (modified from Menéndez et al ., 2008), and location and ages of the three Holocene eruptions that occurred in the Azuaje Ravine (Montañón Negro and Caldereta de Valleseco, from Rodriguez‐Gonzalez et al ., 2009; Doramas, from Rodríguez‐Berriguete & Alonso‐Zarza, 2019). …”

Section: Geological Settingmentioning

confidence: 99%

“…Tufa deposits from Azuaje show 87 Sr/ 86 Sr values of about 0.7035 (Rodríguez‐Berriguete & Alonso‐Zarza, 2019), whereas those from Los Berrazales (Los Rios Ravine) are of 0.7033 and for Las Temisas (Las Pilas Ravine) are of 0.7036 to 0.7037.…”

Section: Tufa Deposits and Faciesmentioning

confidence: 99%

“…Stable isotopes from Azuaje (Rodríguez‐Berriguete & Alonso‐Zarza, 2019), Los Berrazales (Camuera et al ., 2014) and Las Temisas (Estrella de Pinho et al ., 2015). …”

Section: Tufa Deposits and Faciesunclassified

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Carbonate tufas as archives of climate and sedimentary dynamic in volcanic settings, examples from Gran Canaria (Spain)

2021

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Three Holocene tufas from Gran Canaria volcanic island were studied with the aim of deciphering their sedimentary evolution through space and time. Las Temisas tufa (south-eastern arid part of the island) is dominantly composed of oncoids, intraclasts, phytoclasts, coated stems, minor thin stromatolites, and a high amount of siliciclastics. It was deposited in a fluvial system with variable flow velocities and palustrine conditions areas, which alternated with high energy events. Azuaje tufa (northern humid part of the island) is composed of coated stems, stromatolites, oncoids and phytoclasts, with relatively low amounts of siliciclastics, suggesting slow-flowing and palustrine conditions and a relatively low incidence of (high energy) floodings. Los Berrazales tufa (north-west of Gran Ganaria, the most humid one), is mainly composed of coated stems and crystalline crusts, formed in a laminar flow regime. Dominant clastic sedimentation in Las Temisas and high calcite growth rates in Los Berrazales led to a poor development of stromatolites in comparison with Azuaje. Las Temisas and Azuaje deposits have similar upward evolution with decreasing trend in siliciclastics and increasing trend in carbonates. However, Las Temisas has higher siliciclastic and lower phytoclastic contents suggesting a less vegetated area and more arid climate than in the other deposits. Additionally, tufas record local events common in volcanic terrains. Azuaje presents three units bounded by erosive discontinuities, which reveal significant erosion by enhanced runoff that could be caused by loss of vegetation due to wildfires related to volcanic eruptions at headwaters. Las Temisas record a possible interruption in sedimentation represented by aligned boulders due to rockfalls from the hillsides. These deposits formed from waters with similar chemistry providing to the carbonates their similar signals in d 13 C-d 18 O stable isotopes and 87 Sr/ 86 Sr ratios like that of the volcanic rocks. This work shows how, in volcanic areas, tufas are unique archives of the climate, vegetation and volcanic-related processes, because all imprint the sedimentary regime of tufa deposition.

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Radiocarbon and stable isotope evidence of early to mid‐Holocene wet events from fluvial tufa deposits in Santa Cruz, CA

Kanner

Cortés

Ibarra

2022

J Quaternary Science

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It is increasingly important to document past records of hydrologic change in areas that are droughtprone to better predict the region's future vulnerability to recharge and water supply. Holocene spring-associated carbonate deposits serve as terrestrial records of water balance that can complement other local, high-resolution proxies that are moisture-sensitive. Here we examine two carbonate deposits (one inactive perched tufa site and one active fluvial tufa site) that form from ambient-temperature freshwater springs, as proxies of their depositional conditions. Radiocarbon ( 14 C) analyses of charcoal fragments from the inactive perched tufa record depositional ages of 6.2 ± 0.06 (2σ) cal ka BP and 8.0 ± 0.04 (2σ) cal ka BP and agree with the age models from other proxies of past pluvial periods in the region (~16 to 5 ka). The active fluvial tufas date to 853 ± 0.4 cal BP, representing conditions similar to modern flow. Geomorphologic and radiocarbon results indicate the perched tufa reflects wetter conditions fed by a higher water table. Stable isotopic analyses of carbonate (δ 13 C, δ 18 O) reveal distinct isotopic values between modern and early-mid-Holocene tufa. This work underscores potential for the analysis of other moisture-sensitive tufa deposits in coastal central California.

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Controlling factors and implications for travertine and tufa deposition in a volcanic setting

Cited by 22 publications

References 48 publications

Unravelling calcrete environmental controls in volcanic islands, Gran Canaria Island, Spain

Unravelling calcrete environmental controls in volcanic islands, Gran Canaria Island, Spain

Carbonate tufas as archives of climate and sedimentary dynamic in volcanic settings, examples from Gran Canaria (Spain)

Radiocarbon and stable isotope evidence of early to mid‐Holocene wet events from fluvial tufa deposits in Santa Cruz, CA

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