scholarly journals Geochemical Characterization of Bauxite Deposits from the Abruzzi Mining District (Italy)

Minerals ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 298 ◽  
Author(s):  
Francesco Putzolu ◽  
Armando Piccolo Papa ◽  
Nicola Mondillo ◽  
Maria Boni ◽  
Giuseppina Balassone ◽  
...  
Keyword(s):  
Rare Earth ◽  
20Th Century ◽  
Mining District ◽  
Geochemical Characterization ◽  
Average Value ◽  
Geochemical Proxies ◽  
Co Concentration ◽  
The Mean ◽  
Abundant Element

The Abruzzi bauxite district includes the deposits located on the Campo Felice plateau and those of the Monti d’Ocre, which had been mined in the first part of the 20th century. Bauxite is of the karst type, with textures ranging between oolitic and oolitic-conglomeratic, the latter suggesting a partial reworking of evolved lateritic soils. The high contents of Al2O3 and Fe2O3 (average values 53.76 and 21.76 wt %, respectively) are associated with the presence of boehmite, hematite, and minor goethite. SiO2 and TiO2 have average values of 7.79 and 2.75 wt %, corresponding to the presence of kaolinite, anatase and rutile. Among the minor so-called “bauxitophile” elements V, Co, Ni, Cr and Zr, the most enriched is Cr, with an average value of 0.07 wt %. Nickel has an average value of 210.83 ppm. Vanadium shows an average value of 266.57 ppm, whereas the average Co concentration is 35.89 ppm. The total rare earth elements (REE) concentration in the sampled bauxite sites is variable between ca. 700 and 550 ppm. Among REEs, the most abundant element is Ce, with Ce anomalies commonly associated with authigenic REE-fluoro-carbonates, probably produced after the REEs remobilization from primary detrital minerals and their precipitation in neo-formed phases during the bauxitization process. Scandium and Ga occur in small amounts (57 and 60 ppm, respectively), but geochemical proxies of their remobilization and uptake in neo-formed minerals (Fe- and Al-(hydr)oxides, respectively) have been observed. The mean Eu/Eu* and Al2O3/TiO2 ratios and the Ni-Cr contents of the Abruzzi bauxites suggest that the parent rock of these deposits was a material of acid affinity, likely corresponding to volcanic tephra or eolic loess-type sands.

scholarly journals Natural Enrichment of Trace Elements in Surface Horizons of Calcareous Soils (La Mancha, Spain)

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Sandra Bravo Martín-Consuegra ◽  
Jose A. Amorós Ortíz-Villajos ◽  
Caridad Pérez-de-los-Reyes ◽  
Francisco J. García Navarro ◽  
Rolando Ruedas Luna ◽  
...  
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Calcareous Soils ◽  
Major And Trace Elements ◽  
Soil Profiles ◽  
Geochemical Characterization ◽  
Average Value ◽  
La Mancha ◽  
Original Rock

The study of five soil profiles developed on carbonatic sediments of Tertiary Miocene origin has been carried out. The topography of the area was basically flat and the traditional uses of the soils are the cultivation of dry cereals and grapevine. The geochemical characterization of the aforementioned profiles involves a study of the contents of major and trace elements among other pedologic aspects (texture, pH, organic matter, etc.). The results of this study also indicate a superficial enrichment of trace elements due to the leaching of Ca and moderate biological and anthropic activity. We can consider strontium, Sr, as the trace element that characterizes these limy soils (435 mg/kg average content in total soil and 708 mg/kg in the original rock). These contents are similar to the average value in Castilla-La Mancha of 380 mg/kg and are higher than the average in world soils of about 200 mg/kg. High levels of dangerous or pollutant elements (Cd, Hg, Pb, Cu, Zn, or Ni) were not detected. The majority of trace element anomalies are related to calcareous material and the leaching of calcium carbonate (Ca), while the influence of the anthropogenic factor is secondary. Soil quality does not indicate toxicity although surficial enrichment suggests a weak threat from consuming crops.

scholarly journals Geochemical characterization of the mining district of Linares (Jaen, Spain) by means of XRF and ICP-AES

2011 ◽  
Vol 108 (1) ◽  
pp. 21-26 ◽  
Author(s):  
L. Arenas ◽  
M. Ortega ◽  
M.J. García-Martínez ◽  
E. Querol ◽  
J.F. Llamas
Keyword(s):  
Mining District ◽  
Geochemical Characterization

Combined rock-magnetic and geochemical characterization of Angangueo mining district, central Mexico

2016 ◽  
Vol 75 (18) ◽  
Author(s):  
María del Sol Hernández-Bernal ◽  
Juan Morales ◽  
Pedro Corona-Chávez ◽  
Avto Goguitchaichvili ◽  
Francisco Bautista
Keyword(s):  
Central Mexico ◽  
Mining District ◽  
Geochemical Characterization

scholarly journals Supplemental Material: LA-ICP-MS U-Pb dating and geochemical characterization of oil inclusion-bearing calcite cements: Constraints on primary oil migration in lacustrine mudstone source rocks

2021 ◽  
Author(s):  
Ao Su ◽  
et al.
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Source Rocks ◽  
Oil Migration ◽  
Geochemical Characterization ◽  
Icp Ms

Table S1: LA-ICP-MS U-Pb contents (ppm), and 238U/206Pb-207Pb/206Pb ratios of the microcrystalline-granular calcite (MGC) and blocky calcite (BC) in vein samples FSX1-1 and FSX1-2; Table S2: LA-ICP-MS rare earth element (REE) data (ppm) for calcite cements in vein samples FSX1-1 and FSX1-2.

scholarly journals Characterization of Potential Direct Recharge in the Gold Mining District of South-Western Ghana Using the Hydrus-1D Computer Code

2018 ◽  
Vol 10 (3) ◽  
pp. 1
Author(s):  
Frederick Sam ◽  
George Amoako ◽  
Baah Sefa-Ntiri ◽  
Anthony Twum ◽  
P. Mensah-Amoah ◽  
...  
Keyword(s):  
Gold Mining ◽  
Model Simulation ◽  
Computer Code ◽  
Soil Types ◽  
Mean Annual Precipitation ◽  
Mining District ◽  
Recharge Rate ◽  
Average Value ◽  
The Mean ◽  
Hydrus 1D

The mean annual potential recharge rate to the ground water system in the Tarkwa gold mining district of South Western Ghana, has been estimated for the period 1977 to 2001 by analyzing precipitation recharge in response to rainfall pattern and distribution for the four main soil types; Huni, Tarkwa Phyllite, Banket and Kawere. Using the Hydrus-1D infiltration computer code model, simulation results of recharge-precipitation exhibited a linear relationship, and gave correlation coefficient values R2 ranging from 0.39 to 0.55 for the four soil types and 0.72 for the composite soil. Variability of annual recharge was assigned to various reasons, including the variation in the weather pattern (rainfall, temperature, evapotranspiration etc), topography and hydraulic properties of the aquifer system. The potential direct recharge rate was estimated to range from 269 mm/yr to 611 mm/yr, with an average value of 385 mm/yr. This is as a result of infiltration of about 18% to 36% (average 27%) of the mean annual precipitation. The high average value of 385 mm/yr is reasonable on the basis that it represents the potential maximum value of the actual recharge value of 299±72 mm/yr.   

scholarly journals Supplemental Material: LA-ICP-MS U-Pb dating and geochemical characterization of oil inclusion-bearing calcite cements: Constraints on primary oil migration in lacustrine mudstone source rocks

2021 ◽  
Author(s):  
Ao Su ◽  
et al.
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Source Rocks ◽  
Oil Migration ◽  
Geochemical Characterization ◽  
Icp Ms

Table S1: LA-ICP-MS U-Pb contents (ppm), and 238U/206Pb-207Pb/206Pb ratios of the microcrystalline-granular calcite (MGC) and blocky calcite (BC) in vein samples FSX1-1 and FSX1-2; Table S2: LA-ICP-MS rare earth element (REE) data (ppm) for calcite cements in vein samples FSX1-1 and FSX1-2.

Sign in / Sign up

Export Citation Format

Share Document