Provenance and depositional history of continental slope sediments in the Southwestern Gulf of Mexico unraveled by geochemical analysis

Armstrong‐Altrin, John S.; Machain-Castillo, M. L.; Rosales-Hoz, Leticia; Carranza‐Edwards, Arturo; Sanchez-Cabeza, Joan-Albert; Ruíz-Fernández, Ana Carolina

doi:10.1016/j.csr.2015.01.003

Cited by 223 publications

(78 citation statements)

References 93 publications

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“…Compared to the significant Eu-negative anomalies in the central Bohai Bay (Xu et al, 2012), the slight Eu-positive anomalies may be attributed to the well-oxygenated sediment in the coastal Bohai Bay due to shallow overlying water column. In addition, different nature of source rocks can lead to variation of Eu anomaly, sometime from negative to positive (Armstrong-Altrin et al, 2012, 2015. However, due to lack of data, we cannot discuss the possibility of source rocks-caused variation of Eu anomaly from coastal to central Bohai Bay herein.…”

Section: Normalization Analysismentioning

confidence: 96%

Rare earth elements in surface sediments of a marine coast under heavy anthropogenic influence: The Bohai Bay, China

Zhang

Gao

2015

Estuarine, Coastal and Shelf Science

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a b s t r a c tSurface sediments along four river-to-sea transects from the coastal Bohai Bay were assessed using a four-step sequential extraction procedure to determine the concentrations of rare earth elements (REEs) and the geochemical fractions in which those elements were present. The concentrations of light REEs were slightly depleted than those of the middle REEs and the heavy REEs. No significant Ce anomaly was observed whereas slight Eu-positive anomaly was found. The sequential extraction results revealed that the geochemical fractions of REEs followed the order of residual > reducible > oxidizable > acid soluble. The residual fraction accounted for the majority of the total concentrations of REEs. Middle REEs were more easily leached than other REEs. No obvious river-to-sea transportation was observed and the concentrations of REEs in surface sediments of the coastal Bohai Sea were consistent with the data from the Post-Archean Australian Shale. This study further demonstrated on the basis of our previous inference that the geochemical features of REEs in coastal sediments were generally unaffected by heavy anthropogenic effects.

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Section: Normalization Analysismentioning

confidence: 96%

Rare earth elements in surface sediments of a marine coast under heavy anthropogenic influence: The Bohai Bay, China

Zhang

Gao

2015

Estuarine, Coastal and Shelf Science

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“…In the present study, the SiO 2 /Al 2 O 3 ratios vary between 4.1 and 6.0 with an average of 5.1 in the Quemoco sandstones, reflecting a moderate compositional maturity. In addition, another parameter such as index of chemical variability (ICV = [Fe 2 O 3 + K 2 O + Na 2 O + CaO* + MgO + MnO + TiO 2 ]/Al 2 O 3 ) proposed by Cox, Lowe, and Cullers () has also been successfully used to estimate the compositional maturity in various studies (Garzanti et al, ; Armstrong‐Altrin, Machain‐Castillo, et al, ). The ICV values of typical rock‐forming minerals such as feldspars, amphiboles, and pyroxenes are higher than 1, whereas alteration products such as kaolinites, illites, and muscovites have values less than 1 (Armstrong‐Altrin, Nagarajan, et al, ; Cullers, ).…”

Section: Discussionmentioning

confidence: 99%

“…Major element contents of clastic sediments can provide a credible information for the provenance of source area due to their steady geochemical properties during the process of weathering, transportation, and diagenesis (Armstrong‐Altrin, Machain‐Castillo, et al, ; Madhavaraju, ). For example, a discrimination diagram according to multimajor elements put forwarded by Roser and Korsch () has been extensively used to analyse provenance in previous studies (Armstrong‐Altrin, Machain‐Castillo, et al, ; Armstrong‐Altrin, Nagarajan, et al, ; Vdacny, Vozarova, & Vozar, ; Zaid, ). This diagram can help to identify four provenance types (mafic igneous, intermediate igneous, felsic igneous, and quartzose sedimentary).…”

Section: Discussionmentioning

confidence: 99%

Provenance and tectonic setting of the Quemoco sandstones in the North Qiangtang Basin, North Tibet: Evidence from geochemistry and detrital zircon geochronology

Wang

et al. 2017

Geological Journal

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The geochemistry and detrital zircon geochronology of the Quemoco sandstones from the Woruo Mountain area, North Qiangtang Basin, are analysed to discriminate their provenance and tectonic setting. The sandstones were classified as litharenite according to their geochemical data. The index of chemical variability and SiO2/Al2O3 ratio values suggest that the compositional maturity and recycling are weak to moderate. The weathering indices, such as chemical index of alteration, plagioclase index of alteration, and chemical index of weathering, and A–CN–K (Al2O3–(CaO* + Na2O)–K2O) ternary plot reflect that the source areas have undergone a weak degree of weathering. The TiO2 versus Zr, La/Th versus Hf, and Co/Th versus La/Sc bivariate diagrams and multimajor elements discrimination diagram of Quemoco sandstones indicate that the provenances were primarily derived from felsic igneous rocks and may also have less intermediate igneous source rocks. The paleocurrent data and low composition and textural maturity of the Quemoco sandstones suggested that the provenances are mainly from the southwest of the study area and with proximal source features. The U–Pb ages studied here could be divided into 8 groups: 206–219 Ma, 268–283 Ma, 446–630 Ma, 700–970 Ma, 1006–1346 Ma, 1457–1843 Ma, 2087–2214 Ma, and 2331–2587 Ma. The provenances are mainly from the Central Uplift Belt and surrounding of the study area according to the detrital zircon ages and rare earth element parameters, which are composed of Late Triassic tuff, Permian basalt, Early Ordovician granite, Cambrian granite gneiss, and Precambrian crystalline basement. Two multidimensional tectonic discrimination diagrams based on major elements show a complicated tectonic setting composed of a collision, rift, and minor arc setting for the Quemoco sandstones, which is consistent with the nature of a rifted margin during the late Late Triassic.

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“…In general, stronger chemical weathering promotes the dissolution of Na, Mg, Ca and K from source rocks, whereas Al in source rocks is resistant to weathering (Nesbitt and Young, ). Thus, higher CIA values indicate increased chemical weathering intensity on the source rock (Armstrong‐Altrin, ; Armstrong‐Altrin et al ., ; Armstrong‐Altrin and Machain‐Castillo, ). For example, unweathered igneous rocks have CIA values close to 50%, Phanerozoic shales have CIA values from 70 to 75%, and residual clays (kaolinite, chlorite, and gibbsite) have CIA values close to 100% (Nesbitt and Young, , ).…”

Section: Discussionmentioning

confidence: 99%

Flooding history of Lake Nakaumi, western Japan, inferred from sediment records spanning the past 700 years

Ota

Kawahata

Sato

et al. 2017

J Quaternary Science

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Management of flood risk can benefit from a knowledge‐based approach to flooding history. However, the data on such events are often insufficient for an objective evaluation of flooding characteristics such as their intensity. Therefore, we analyzed a 14C‐dated sediment core recovered from near the Iinashi River mouth in Lake Nakaumi, western Japan, and reconstructed flooding records over the past 700 years from rock magnetism, grain‐size distribution and sediment geochemistry. The sediment core contained three black layers, characterized by high magnetic susceptibility, low anhysteretic remanent magnetization to saturation isothermal remanent magnetization ratio, high total organic carbon (TOC) to total nitrogen ratio, and coarse mean grain size, which we identified as possible flooding event deposits. Moreover, the chemical index of alteration was low and the TOC to total sulfur ratio was high in these layers, indicating intensified erosion associated with more freshwater inflow due to the flood events. We tentatively correlated the three event deposits with historical floods along the Iinashi River in AD 1596, 1666 and 1826. The variations in rock magnetic and geochemical properties suggest that the flooding in AD 1666 may have been the least extreme of the events detected in the core.

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Provenance and depositional history of continental slope sediments in the Southwestern Gulf of Mexico unraveled by geochemical analysis

Cited by 223 publications

References 93 publications

Rare earth elements in surface sediments of a marine coast under heavy anthropogenic influence: The Bohai Bay, China

Rare earth elements in surface sediments of a marine coast under heavy anthropogenic influence: The Bohai Bay, China

Provenance and tectonic setting of the Quemoco sandstones in the North Qiangtang Basin, North Tibet: Evidence from geochemistry and detrital zircon geochronology

Flooding history of Lake Nakaumi, western Japan, inferred from sediment records spanning the past 700 years

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