Mineralogy and geochemistry of clastic sediments of the Terani Formation, Cauvery Basin, southern India: implications for paleoweathering, provenance and tectonic setting

Madhavaraju, Jayagopal; Rajendra, Subin Prakash; Lee, Yong Il; Montoya, Erik Ramirez; Ramasamy, S.; Santacruz, Rufino Lozano

doi:10.1007/s12303-019-0047-2

Cited by 23 publications

(16 citation statements)

References 70 publications

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“…In addition, Eu anomaly values can be of great help in understanding the physicochemical conditions of various geochemical systems, such as the sedimentation environment of limestones. Positive Eu anomalies (normalized to PAAS) are generally observed in limestones affected by hydrothermal processes (Siby et al, 2008;Madhavaraju and Lee, 2009). Negative Eu/Eu* anomalies are a geochemical feature of post-Archean cratonic deposits and are generally associated with mafic source rocks (Sinisi, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Negative Eu/Eu* anomalies are a geochemical feature of post-Archean cratonic deposits and are generally associated with mafic source rocks (Sinisi, 2018). In addition, intense diagenesis, and differences in the amount of feldspar and wind input are other factors that can have a positive effect (Madhavaraju and Lee, 2009). Also, based on the SHAB (Hard/ Soft of Acids and Bases) theory proposed by Dai (1987), some reduced species such as CO, CH 4 , S 2 O 3 2− , S 2 -and HS-increase in the aqueous system under low oxygen fugacity.…”

Section: Discussionmentioning

confidence: 99%

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Gemological features of diaspore in sodra—Milas (mugla) region

Kinaci

Öztürk

2023

Front. Earth Sci.

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Diaspore, is related to bauxite in terms of its formation mechanism. Diaspore is one of the gemstone quality stones used in jewelry and jewelry making. It is possible to come across gemstones in various regions of the world. In our country, there are gemstone deposits in all regions. In these deposits, diaspore crystals are considered very valuable. Within the scope of this study, it was aimed to determine the gemological features of the diaspore formations in Sodra (Milas-Mugla) and its surroundings, as well as to determine other minerals and their formation conditions. Main oxide, trace, and rare earth element analyses were performed on seven collected samples. The classification was made using the Al2O3-SiO2-Fe2O3 triangular variation and it was determined that bauxite samples were in the “ferric bauxite” and “bauxite” areas. SEM imaging and EDS analyzes were performed on the samples and according to this result, it was determined that the samples mainly contained O, Al, and Si. The data obtained as a result of Raman Spectroscopy were matched with the device’s own data library and it was determined that the samples taken from the Sodra region were diaspore. In addition, according to the results of the FTIR analysis performed on the faceted sample taken from the Sodra region, it was seen that the samples were compatible with the reference standards and it was scientifically proven to be a diaspore crystal with gemstone quality. During the field studies carried out in the study area, diaspore crystals were encountered in the Milas-Sodra region, together with chloritoid and muscovite, within the metabauxite formations and in the altered zones close to the metabauxite limestone contact. Rock were classified as “muscovitequartzschist,” “quartzschist” with grano-lepidoblastic texture, “micaquartzschist” with lepidoblastic texture, “phyllite” with lepidoblastic texture, and “chlorite-epidote fels” with nematoblastic texture as a result of petrographic analyzes performed on the country rock samples. It is predicted that these gemstone-quality diaspore crystals can be evaluated economically.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Gemological features of diaspore in sodra—Milas (mugla) region

Kinaci

Öztürk

2023

Front. Earth Sci.

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“…To infer the provenance of the Barra del Tordo and Tesoro beach sediments, we employed a provenance (Roser and Korsch 1988), which is frequently used in various studies (e.g. Tawfik et al 2018;Bineli et al 2020;Madhavaraju et al 2020;Mustafa and Tobia 2020). On this plot, the samples are clustered in the quartzose sedimentary provenance field (Fig.…”

Section: Geochemistrymentioning

confidence: 99%

Provenance of sediments from Barra del Tordo and Tesoro beaches, Tamaulipas State, northwestern Gulf of Mexico

Ramos-Vázquez

Armstrong‐Altrin

2021

J. Palaeogeogr.

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The mineralogy, bulk sediment geochemical composition, and U–Pb ages of detrital zircons retrieved from the Barra del Tordo (Tordo) and Tesoro beach sediments in the northwestern Gulf of Mexico were analyzed to determine their provenance. The beach sediments are mainly composed of quartz, ilmenite, magnetite, titanite, zircon, and anorthite. The weathering proxies such as the Chemical Index of Alteration (CIA), Chemical Index of Weathering (CIW), and Plagioclase Index of Alteration (PIA), reveal a moderate-to-high intensity of weathering in the source area. The chondrite-normalized rare earth element (REE) patterns are similar to felsic igneous rocks, with large negative europium anomaly (Eu/Eu* = ~ 0.47–0.80 and ~ 0.57–0.67 in the Tordo and Tesoro beach sediments, respectively).Three major zircon U–Pb age groups are identified in the Tordo and Tesoro beach sediments, i.e., Proterozoic (~ 2039–595 Ma), Mesozoic (~ 244–70.3 Ma), and Cenozoic (~ 65.9–1.2 Ma). The differences of the zircon age spectrum between the Tordo and Tesoro beach sediments are not significant. The comparison of zircon U–Pb ages in this study with ages of potential source terranes suggests that the Mesozoic and Cenozoic zircons of the studied Tordo and Tesoro beach sediments were derived from the Eastern Alkaline Province (EAP) and Mesa Central Province (MCP). Similarly, the likely sources for the Proterozoic zircons were the Sierra Madre Oriental (SMOr) and Oaxaquia in the northwestern Gulf of Mexico. The results of this study further indicate that the sediments delivered to the beaches by rivers and redistributed by longshore currents were crucial in determining the sediment provenance.

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“…The negative correlation between ΣLREE/ΣHREE and Zr (ironrich duricrust: r = −0.77; clay-rich horizon: r = −0.56; Table 3) strongly confirms that REE elements were not controlled by zirconium distribution. However, the strong positive correlation of ΣLREE/ΣHREE against Y (iron-rich duricrust: r = 0.80; Table 3) indicates a significant role for Y-rich mineral phases in controlling the distribution of REE elements (lanthanides) in agreement with Madhavaraju et al (2020).…”

Section: Geochemical Parameters Distribution and Fractionation Of Ree...mentioning

confidence: 99%

Mineralogical and geochemical characteristics of the iron–duricrust deposit in Adi-Daero area, northwestern Tigray, Ethiopia: implication for the origin and controlling factors

Gebru

Gidey

Gebresilassie

et al. 2020

Applied Earth Science

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Mineralogical and geochemical variations of elements from the Adi-Daero iron-duricrust were studied using petrographic, X-ray diffraction and geochemical analyses. Petrographic studies of the samples confirmed the presence of nodular and colloform textural features. The XRD analysis showed the presence of haematite, goethite, quartz, kaolinite and ilmenite are the mineral constituents. Major-element geochemistry was determined by ICP-AES, and trace and REEs were analysed using ICP-MS. Of the major oxides, Fe 2 O 3 (6.8-72.93 wt-%) and SiO 2 (11.07-77.75 wt-%) showed significant variation with generally increasing and decreasing trends from the iron-rich duricrust to the bedrock, respectively. In the profile studied, the alkali and alkaline earth elements (Ca, Mg, Na and K) were highly depleted, suggesting that iron-duricrust near-complete leaching. Elevated values of Sr and Ba in the lower part of the profile are probably due to their abundance in the protolith material (sandstone). A considerable enrichment of V and Cr, and Zr and REEs in the iron-rich duricrust and clay-rich horizon compared to the bedrock confirms their substitution for the Feoxyhydroxides, occurring in heavy mineral phases and adsorbed onto clay minerals, respectively. The La/Y <1 indicates an acidic environment in the upper part of the profile (AD-1 to AD-6; 0.64-0.99) and La/Y >1 a basic environment in the basal part of the profile (AD-7 to AD-12; 1.13-1.58). Similarly, the (La/Yb)N ratio of samples AD-1 to AD-6 (6.81-8.05) is significantly lower than that of AD-7 to , reflecting an acidic environment. Positive Ce anomalies in the samples of AD-1 to AD-2 (1.17-1.2) are linked to the existence of cerianite due to change in oxidation state of Ce while in AD-8 and AD-9 (0.92-0.93), it is related to adsorption of Ce ions onto clay particles protolith. Therefore, the absolute enrichment of iron in the Adi-Daero iron-duricrust deposit was most likely an in situ process that involved vertical transfer from the iron-poor sandstone source rock.

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Mineralogy and geochemistry of clastic sediments of the Terani Formation, Cauvery Basin, southern India: implications for paleoweathering, provenance and tectonic setting

Cited by 23 publications

References 70 publications

Gemological features of diaspore in sodra—Milas (mugla) region

Gemological features of diaspore in sodra—Milas (mugla) region

Provenance of sediments from Barra del Tordo and Tesoro beaches, Tamaulipas State, northwestern Gulf of Mexico

Mineralogical and geochemical characteristics of the iron–duricrust deposit in Adi-Daero area, northwestern Tigray, Ethiopia: implication for the origin and controlling factors

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