Abstract
This
study
investigates
the
characteristics
and
fractionation
of
rare
earth
elements
(REEs)
in
weathered
products
granite
from
South
Bangka,
Indonesia.
Samples
were
collected
two
drill
holes
(TBKP‐30
TBKP‐38)
at
depths
ranging
0.5
to
18
m.
Analytical
methods,
including
X‐ray
diffraction
(XRD),
fluorescence
(XRF),
inductively
coupled
plasma
mass
spectrometry
(ICP‐MS),
scanning
electron
microscopy
(SEM‐EDS),
used
examine
mineral
compositions
REE
distribution.
The
parent
is
an
S‐type
biotite
with
total
concentrations
between
1081
1279
ppm.
dominant
REE‐bearing
minerals
are
REE‐fluorocarbonates
(synchysite,
parisite)
REE‐phosphates
(apatite,
monazite,
xenotime),
accompanied
by
REE‐silicates
(allanite,
thorite,
zircon).
Fluorocarbonates
occur
filling
grain
boundaries
parental
granite,
suggesting
later
overprinting.
Monazite,
xenotime,
zircon
identified
as
part
crystal
lattice
residual
both
profiles.
TBKP‐30,
has
significantly
depleted
REEs
high
intensity
degree
weathering
occurrence
gibbsite
minerals.
TBKP‐38,
cerium
enrichment
lower
profile,
caused
fixation
into
cerianite
and/or
it
incorporation
Fe‐Mn
hydr(oxides)
along
kaolinite
highlights
patterns
a
potential
indicator
intensity,
providing
insights
crucial
for
exploration
deposits
development
sustainable
extraction
methods.
Journal of Analytical Atomic Spectrometry,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 11, 2024
This
review
covers
advances
in
the
analysis
of
air,
water,
plants,
soils
and
geological
materials
by
a
range
atomic
spectrometric
techniques,
including
emission,
absorption,
fluorescence
mass
spectrometry.
Environmental Monitoring and Assessment,
Год журнала:
2024,
Номер
196(12)
Опубликована: Ноя. 7, 2024
Solid
waste
incineration
(SWI)
can
release
numerous
air
pollutants
although
the
geographic
reach
of
emissions
is
not
routinely
monitored.
While
many
studies
use
moss
and
lichens
for
biomonitoring
trace
elements,
including
around
SWIs,
few
investigate
complex,
multi-element
footprint
expected
from
SWI
emissions.
This
study
develops
using
native
as
a
screening
tool
while
also
informing
community
concerns
about
an
aging
incinerator
in
rural
Oregon,
USA.
Trained
volunteers
helped
collect
36
composite
samples
epiphytic
(Orthotrichum
s.l.)
along
32-km
transect
SWI.
We
used
ICP-MS
to
measure
40
elements
moss,
14
rare
earth
(REEs)
previously
unexplored
compared
elemental
signatures
with
profile
modeled
relationships
between
element
concentrations
distance
facility
nonparametric
regression.
The
chemical
pointed
source,
potentially
through
both
stack
fugitive
dust
strongest
models
described
farther-dispersing
mercury
cadmium
(xR
Abstract
This
study
investigates
the
characteristics
and
fractionation
of
rare
earth
elements
(REEs)
in
weathered
products
granite
from
South
Bangka,
Indonesia.
Samples
were
collected
two
drill
holes
(TBKP‐30
TBKP‐38)
at
depths
ranging
0.5
to
18
m.
Analytical
methods,
including
X‐ray
diffraction
(XRD),
fluorescence
(XRF),
inductively
coupled
plasma
mass
spectrometry
(ICP‐MS),
scanning
electron
microscopy
(SEM‐EDS),
used
examine
mineral
compositions
REE
distribution.
The
parent
is
an
S‐type
biotite
with
total
concentrations
between
1081
1279
ppm.
dominant
REE‐bearing
minerals
are
REE‐fluorocarbonates
(synchysite,
parisite)
REE‐phosphates
(apatite,
monazite,
xenotime),
accompanied
by
REE‐silicates
(allanite,
thorite,
zircon).
Fluorocarbonates
occur
filling
grain
boundaries
parental
granite,
suggesting
later
overprinting.
Monazite,
xenotime,
zircon
identified
as
part
crystal
lattice
residual
both
profiles.
TBKP‐30,
has
significantly
depleted
REEs
high
intensity
degree
weathering
occurrence
gibbsite
minerals.
TBKP‐38,
cerium
enrichment
lower
profile,
caused
fixation
into
cerianite
and/or
it
incorporation
Fe‐Mn
hydr(oxides)
along
kaolinite
highlights
patterns
a
potential
indicator
intensity,
providing
insights
crucial
for
exploration
deposits
development
sustainable
extraction
methods.
