scholarly journals Mineral chemistry and supporting databases for TGI4 project on "Trace elements in Fe-oxides from fertile and barren igneous complexes: Investigating their use as a vectoring tool in the intrusions that host Ni-Cu-PGE deposits"

2014 ◽  
Author(s):  
S A S Dare ◽  
D E Ames ◽  
P C Lightfoot ◽  
S -J Barnes ◽  
G Beaudoin
Keyword(s):  
Trace Elements ◽  
Mineral Chemistry ◽  
Fe Oxides ◽  
Igneous Complexes

scholarly journals Association of trace elements and dissolution rates of soil iron oxides

Soil Research ◽  
2014 ◽  
Vol 52 (1) ◽  
pp. 1 ◽  
Author(s):  
D. Ketrot ◽  
A. Suddhiprakarn ◽  
I. Kheoruenromne ◽  
B. Singh
Keyword(s):  
Trace Elements ◽  
Dissolution Rate ◽  
Significant Proportion ◽  
Dissolution Kinetics ◽  
Major And Trace Elements ◽  
Cube Root ◽  
Fe Oxide ◽  
Fe Oxides ◽  
Batch Dissolution ◽  
Dissolution Behaviour

In this study, nine Oxisols and five Ultisols from Thailand were used to determine the association of major and trace elements with iron (Fe) oxides. The Fe oxides were concentrated and the association of elements (Al, Ca, Cu, Cr, Mg, Mn, Ni, Pb, P, Si, V, Ti, Zn) with Fe was evaluated using batch dissolution in 1 m HCl at 20°C. The dissolution behaviour of Fe oxide concentrates was determined using batch dissolution and flow-through reactors. In addition to Fe, both Al and Ti were present in significant amounts in the Fe oxide concentrates. Manganese was the most abundant trace element, and Cu, Zn, Pb and As concentrations were <250 mg kg–1 in most samples. The dissolution behaviour of Fe-oxide concentrates indicated that Al, Cr and V were mostly substituted for Fe3+ in the structure of goethite and hematite. A significant proportion of Mn, Ni, Co, Pb and Si was also present within the structure of these minerals. Some Mg, Cu, Zn, Ti and Ca was also associated with Fe oxides. The dissolution kinetics of Fe oxide concentrates was well described by three models, i.e. the cube root law, Avrami–Erofejev equation and Kabai equation, with the dissolution rate constants (103k) corresponding to the three models ranging from 0.44 to 6.11 h–1, from 1.01 to 4.40 h–1 and from 0.03 to 4.12 h–1, respectively. The k constants of Fe oxide concentrates in this study were significantly and negatively correlated with the mean crystal dimension derived from [110] and [104] of hematite, the dominant mineral in most samples. The steady-state dissolution rate of a soil Fe-oxide concentrate (sample Kk) was substantially higher than for synthetic goethite under highly acidic conditions; this is possibly due to the greater specific surface area of sample Kk than the synthetic goethite.

Chlorites in a spectrum of igneous rocks: mineral chemistry and paragenesis

1995 ◽  
Vol 59 (394) ◽  
pp. 129-141 ◽  
Author(s):  
Abdel-Fattah M. Abdel-Rahman
Keyword(s):  
Structural Type ◽  
Mineral Chemistry ◽  
Igneous Rocks ◽  
The Other ◽  
High Alumina ◽  
X Ray Diffraction ◽  
Calc Alkaline ◽  
Peralkaline Granite ◽  
Igneous Complexes ◽  
Data Points

AbstractThe chlorite data presented are from four igneous complexes covering the compositional spectrum of igneous rocks (gabbro to granite) of orogenic and anorogenic settings. The four igneous complexes are; early orogenic gabbro-diorite-tonalite (D-T) suite, late orogenic granodiorite-adamellite (G-A) suite (both are calc-alkaline suites), high-alumina trondhjemite (TR), and anorogenic peralkaline granite (PGR).Chlorites in these igneous rocks show characteristic compositional fields. The Mg vs Fe plot provides the best discriminant, as data points define three compositionally different groups. Phases in the PGR are Fe-rich, siliceous, interlayered chlorite-smectite (Fe/Mg = 8.6), and differ significantly from those in the calc-alkaline D-T and G-A rocks which are Mg-rich chlorites (Fe/Mg = 0.6–0.8). The X-ray diffraction data for the peralkaline granite samples show superlattice reflections at approximately 31 Å (air-dried) and 34 Å (ethylene glycollated), thus suggesting the presence of an expandable (smectite-like) component in this interlayered (chlorite-smectite) phyllosilicate phase. Chlorites in the peraluminous TR rocks contain Fe/Mg values intermediate between the other two types (Fe/Mg = 1.3). Tetrahedral Al (AlZ) values are remarkably low (0–0.5) in phyllosilicates in the PGR, but vary from 1.9–2.5 in chlorites from the other suites. Yet, these chlorite groups with their generally low AlZ values are distinct from the more stable (type IIb) metamorphic chlorites. Sedimentary chlorites are somewhat similar, in their low AlZ values and metastable structural type, to chlorites in igneous rocks.In the calc-alkaline rocks, chlorite may have been formed at the expense of both biotite [biotite + 3M + 3H2O = chlorite + A], and calcic amphibole [2 Ca-amphibole + 6H2O + 5O2 + 1.8Al = 1 chlorite + 8SiO2 + A], where M = Fe, Mg, Al, and A = K, Na, Ca. The alteration of alkali amphibole in the peralkaline rocks may have produced interlayered chlorite-smectite via this reaction; [1 Na-amphibole + 7H2O + 2.5O2 + M = 1 chlorite-smectite + A]. The presence of such interlayered chlorite-smectite which typically form at low T (150–200°C) suggests that the region was not affected by any major reheating events, which is consistent with the nature of the feldspars.

Trace elements mineral chemistry of sulfides from the Woxi Au‐Sb‐W deposit, southern China

2021 ◽  
Author(s):  
Zhekai Zhou ◽  
Kotaro Yonezu ◽  
Akira Imai ◽  
Thomas Tindell ◽  
Huan Li ◽  
...  
Keyword(s):  
Trace Elements ◽  
Southern China ◽  
Mineral Chemistry

Minor and trace elements in bornite and associated Cu–(Fe)-sulfides: A LA-ICP-MS studyBornite mineral chemistry

2011 ◽  
Vol 75 (21) ◽  
pp. 6473-6496 ◽  
Author(s):  
Nigel J. Cook ◽  
Cristiana L. Ciobanu ◽  
Leonid V. Danyushevsky ◽  
Sarah Gilbert
Keyword(s):  
Trace Elements ◽  
Mineral Chemistry ◽  
Minor And Trace Elements ◽  
Icp Ms

scholarly journals Mineralogical Diversity of Ca2SiO4-Bearing Combustion Metamorphic Rocks in the Hatrurim Basin: Implications for Storage and Partitioning of Elements in Oil Shale Clinkering

Minerals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 465 ◽  
Author(s):  
Ella Sokol ◽  
Svetlana Kokh ◽  
Victor Sharygin ◽  
Victoria Danilovsky ◽  
Yurii Seryotkin ◽  
...  
Keyword(s):  
Trace Elements ◽  
High Temperature ◽  
Trace Element ◽  
Mineral Chemistry ◽  
Low Pressure ◽  
Joint Effect ◽  
Cement Clinker ◽  
Element Partitioning ◽  
Key Issues ◽  
Oil Shales

This is the first attempt to provide a general mineralogical and geochemical survey of natural Ca2SiO4-bearing combustion metamorphic (CM) rocks produced by annealing and decarbonation of bioproductive Maastrichtian oil shales in the Hatrurim Basin (Negev Desert, Israel). We present a synthesis of data collected for fifteen years on thirty nine minerals existing as fairly large grains suitable for analytical examination. The Hatrurim Ca2SiO4-bearing CM rocks, which are natural analogs of industrial cement clinker, have been studied comprehensively, with a focus on several key issues: major- and trace-element compositions of the rocks and their sedimentary precursors; mineral chemistry of rock-forming phases; accessory mineralogy; incorporation of heavy metals and other trace elements into different phases of clinker-like natural assemblages; role of trace elements in stabilization/destabilization of Ca2SiO4 polymorphic modifications; mineralogical diversity of Ca2SiO4-bearing CM rocks and trace element partitioning during high-temperature–low-pressure anhydrous sintering. The reported results have implications for mineral formation and element partitioning during high-temperature–low-pressure combustion metamorphism of trace element-loaded bituminous marine chalky sediments (“oil shales”) as well as for the joint effect of multiple elements on the properties and hydration behavior of crystalline phases in industrial cement clinkers.

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