Tellurium and Mercury in Late Cretaceous to Early Eocene Sediments as Proxies for Volcanic Activity in the Deccan and North Atlantic Large Igneous Provinces
Geochemistry Geophysics Geosystems,
Journal Year:
2025,
Volume and Issue:
26(2)
Published: Feb. 1, 2025
Abstract
Late
Maastrichtian
to
Early
Eocene
sediments
from
Wadi
Nukhul,
Egypt
were
deposited
between
about
67
and
55.5
Ma
during
the
eruption
of
Deccan
Traps
North
Atlantic
Igneous
Province
(NAIP).
We
use
Te
Hg
as
proxies
for
volcanism
constrain
timing
flood
basalt
relative
environmental
perturbations
extinction
events
this
period.
find
enrichment
in
latest
earliest
Danian
Paleocene
Eocene,
which
result
enhanced
volcanic
input
Te.
An
increase
coincides
with
Warming
Event.
A
second
larger
peak
begins
120–80
kyr
before
Cretaceous/Paleogene
boundary
(KPB)
continues
into
Danian,
highest
values
70–30
prior
KPB,
potentially
related
eruptions
voluminous
Wai
subgroup.
The
Chicxulub
impact,
therefore,
did
not
trigger
these
eruptions,
likely
led
climate
instability,
may
have
amplified
effects
impact.
6
Myr
period
low
is
followed
by
an
starting
at
57.5
peaking
Paleocene‐Eocene
(PEB;
56
Ma)
opening
eruptive
rates
NAIP.
In
contrast,
variations
over
same
time
are
less
systematic.
Our
results
show
that
be
a
robust
proxy,
complementary
Hg,
large
events.
Language: Английский
Correlation and cyclicity of stratigraphic sequence boundaries and chronostratigraphic stage boundaries of the last 253 My: Synchrony of tectonism, sea level, climate and biotic change
Michael R. Rampino,
No information about this author
K. Caldeira
No information about this author
Earth-Science Reviews,
Journal Year:
2025,
Volume and Issue:
unknown, P. 105100 - 105100
Published: March 1, 2025
Language: Английский
Platinum-group elements (PGEs) and rhenium in Permian-Triassic boundary sediments from southern China and Japan linked to concurrent eruptions of the Siberian Traps
Chemical Geology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 122715 - 122715
Published: March 1, 2025
Language: Английский
Greatly increased CO2
Scott E. Elias
No information about this author
Elsevier eBooks,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Language: Английский
Mechanisms of global climate change during the five major mass extinctions
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: May 12, 2025
Since
the
emergence
of
diverse
animal
phyla
around
500
million
years
ago,
five
major
mass
extinction
events
have
occurred,
each
coinciding
with
abnormal
climate
changes.
We
analyzed
sedimentary
organic
molecules
from
first
and
least
understood
event
at
end
Ordovician
period.
divided
all
extinctions
into
two
phases
each,
totaling
ten
events,
examined
relationship
between
shifts
"coronene
index"-an
indicator
heating
temperatures
in
rocks
caused
by
volcanic
activity
or
meteorite
impacts.
As
a
result,
we
found
that
four
began
global
cooling
ended
warming,
while
one
started
an
unknown
anomaly
also
warming.
During
initial
phases,
showed
low-temperature
heating,
high-temperature,
moderate-temperature.
All
subsequent
warming
moderate-temperature
heating.
These
findings
suggest
large-scale
eruptions
impacts
heated
sulfides,
sulfates,
hydrocarbons
varying
temperatures,
releasing
SO2
soot
stratosphere,
blocking
sunlight,
triggering
extinction.
This
was
followed
moderate
carbonates,
increasing
CO2
emissions
driving
long-term
leading
to
secondary
events.
Language: Английский
Global Eocene-Oligocene unconformity in clastic sedimentary basins
Earth-Science Reviews,
Journal Year:
2024,
Volume and Issue:
258, P. 104912 - 104912
Published: Oct. 7, 2024
Language: Английский
Statistical approaches for improved definition of carbon isotope excursions
Earth-Science Reviews,
Journal Year:
2024,
Volume and Issue:
255, P. 104851 - 104851
Published: June 27, 2024
Language: Английский
The impact catastrophism and Alvarez theory of mass extinctions in a retrospective, perspective and prospective: towards the Phanerozoic impact event stratigraphy
Earth-Science Reviews,
Journal Year:
2024,
Volume and Issue:
259, P. 104904 - 104904
Published: Aug. 31, 2024
Language: Английский
Correlation of sub-centennial-scale pulses of initial Central Atlantic Magmatic Province lavas and the end-Triassic extinctions
Dennis V. Kent,
No information about this author
Paul E. Olsen,
No information about this author
Huapei Wang
No information about this author
et al.
Proceedings of the National Academy of Sciences,
Journal Year:
2024,
Volume and Issue:
121(46)
Published: Oct. 28, 2024
The
end-Triassic
extinction
(ETE)
on
land
was
synchronous
with
the
initial
lavas
of
Central
Atlantic
Magmatic
Province
(CAMP)
and
occurred
just
after
brief
26
thousand
year
(kyr)
reverse
geomagnetic
polarity
Chron
E23r
that
can
be
used
for
global
correlation.
Lava-by-lava
paleomagnetic
secular
variation
data,
previously
reported
from
Morocco
northeastern
United
States
combined
our
data
North
Mountain
Basalt
Fundy
Basin
Canada
show
phase
CAMP
volcanism
in
only
five
directional
groups
or
pulses
each
occupying
less
than
a
century.
first
four
occur
during
~40
kyr
period
based
available
astrochronology
U-Pb
geochronology.
coincidence
major
pulse
ETE
points
to
short-lived
volcanic
winters
albedo-induced
by
sulfate
aerosols
as
plausible
key
agent
extinctions
tropical
continental
realm,
whereas
looser
correlations
allow
prolonged
CO
2
emissions
contribute
more
long-ranging
effects
marine
realm
via
ocean
acidification
longer-term
warming.
Language: Английский
Duration and intensity of the Late Permian (early Wuchiapingian) cool climate episode: Sclerochemical evidence from brachiopod assemblages in Iran
Palaeogeography Palaeoclimatology Palaeoecology,
Journal Year:
2024,
Volume and Issue:
unknown, P. 112654 - 112654
Published: Dec. 1, 2024
Language: Английский