Time contained within coal seams is most commonly estimated using a volumetric approach
that fails to take into account processes of carbon accumulation and loss during peat …

Upper Paleocene to middle Miocene coal samples collected from active mines in the
western Venezuelan States of Táchira, Mérida and Zulia have been characterized through …

A rapid and reliable method for analyzing Fe and Ca in low-rank Greek coals was
developed. The presence of Fe and Ca is of importance regarding the potential use of these …

About 7 Mt of high volatile bituminous coal are produced annually from the four coal zones
of the Upper Paleocene Marcelina Formation at the Paso Diablo open-pit mine of western …

Mean contents of trace elements and ash in channel, bench-column, and dump samples of
the abandoned Bon Air coal (Lower Pennsylvanian) in Franklin County, Tennessee are …

The aim of this research work is a geochemical, mineralogical, and textural characterization
of spontaneously smouldered coal-derived products in northwestern Venezuela (Cerro …

A series of coal seams (groups 4 to 11) of Paleocene age in the Marcelina Formation have
been open pit exploited in two mines (Paso Diablo and Mina Norte) in the Guasare Coalfield …

Although the Mehdiabad zinc‐lead deposit is one of the most well‐known deposits in the
central Iran structural zone, the genesis of the deposit remains controversial. The host rock …

Major and trace element concentrations in fresh and altered coals in outcrops and coalfields
from Táchira and Mérida states (Venezuela), as well as from Napo and Pastaza provinces …

Se determinó la concentración de Ge, As y Hg en muestras de carbones venezolanos
provenientes de los estados Falcón y Lara, aplicándose un procedimiento de …