scholarly journals Quality of coal seam D of Muara Enim Formation, Central Palembang Subbasin

2021 ◽  
Vol 882 (1) ◽  
pp. 012051
Author(s):  
A B Purnama ◽  
S S Yudha ◽  
W Surono
Keyword(s):  
Coal Seam ◽  
Trace Element ◽  
Middle Miocene ◽  
Trace Element Content ◽  
Element Content ◽  
Low Rank ◽  
Oxide Content ◽  
Low Rank Coal ◽  
Ash Composition

Abstract Coal seam D belongs to Muara Enim Formation in Central Palembang Subbasin, South Sumatera Basin, which ages of Middle Miocene to Late Miocene. This study aims to determine the quality of the coal, especially sulphur content and form, ash content and composition, and trace elements of heavy metals. Those are important to know as a reference in suitability in the use of this coal. Methods of analysis is proximate, total of sulphur, form of sulphur, SEM-EDS, ash composition, and trace element. The coal is categorized as low rank coal or lignite with a very low total sulphur max 0.25%, dominated by the organic sulphur formed during the peatification and coalification process (syngenetic). The coal has a safe ash composition. It shows from a very low metal oxide content that causes slagging and fouling at low temperatures process. Likewise, the trace element content of the coal such as chromium (Cr), cadmium (Cd), manganese (Mn), lead (Pb), nickel (Ni) is still far below the threshold for trace element content in coal.

Restitic or not? Insights from trace element content and crystal — Structure of spinels in African mantle xenoliths

Lithos ◽  
2017 ◽  
Vol 278-281 ◽  
pp. 464-476 ◽  
Author(s):  
Davide Lenaz ◽  
Maria Elena Musco ◽  
Maurizio Petrelli ◽  
Rita Caldeira ◽  
Angelo De Min ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Trace Element ◽  
Trace Element Content ◽  
Mantle Xenoliths ◽  
Element Content

The implications of reworking on the mineralogy and chemistry of Lower Carboniferous K-bentonites

Clay Minerals ◽  
1996 ◽  
Vol 31 (3) ◽  
pp. 377-390 ◽  
Author(s):  
T. Clayton ◽  
J. E. Francis ◽  
S. J. Hillier ◽  
F. Hodson ◽  
R. A. Saunders ◽  
...  
Keyword(s):  
Trace Element ◽  
Volcanic Ash ◽  
Clay Fraction ◽  
Trace Element Content ◽  
Element Content ◽  
Heavy Minerals ◽  
Lower Carboniferous ◽  
Greenish Yellow ◽  
Trace Element Contents ◽  
Plastic Clays

AbstractPotassium-bentonites have been found in the Courceyan Lower Limestone Shales near Burrington Combe and Oakhill, Somerset, consisting of thin, greenish yellow, plastic clays interbedded within a mudrock and limestone sequence. Mineralogically, the clay fraction is composed of virtually monomineralic interstratified illite-smectite containing 7–10% smectite layers. The clay fraction of the surrounding mudrocks, however, consists of an illite-chlorite dominated assemblage. Their mineral composition, trace element content, and the relative abundance of zircon crystals suggest an origin from burial of montmorillonite originally formed from volcanic ash. The presence of anomalously high trace element contents with both euhedral and rounded zircon grains in the Oakhill K-bentonites suggests a secondary or reworked origin for these samples. In contrast, the presence of a non-anomalous trace element content and large (>100 μm) euhedral zircon grains suggests that the Burrington K-bentonite is primary in origin. Modelling of whole-rock rare-earth element (REE) patterns shows that the Oakhill REE pattern can be derived from the Burrington pattern by the addition of small contributions from zircon and monazite, two major heavy minerals present. These K-bentonites probably represent the oldest Carboniferous K-bentonites so far recorded in the British Isles.

Using trace element content and lead isotopic composition to assess sources of PM in Tijuana, Mexico

2016 ◽  
Vol 132 ◽  
pp. 171-178 ◽  
Author(s):  
D. Salcedo ◽  
T. Castro ◽  
J.P. Bernal ◽  
V. Almanza-Veloz ◽  
M. Zavala ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Trace Element ◽  
Trace Element Content ◽  
Element Content ◽  
Lead Isotopic Composition
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