Parameter
Proxy
Basic assumption(s/ Empirical relationship
Selected reference(s)"
sediment
45
Hei'~::rh;
He and I
Be are
if the "cosmic input" of
Marcantonio et a1.
focussing
IOBeI'JOTh
fonned by cosmic ray 3He and lOBe is constant
(1996; 1995);
spallation reactions at over the time interval
Farley (1995);
a constant rate
under consideration and Farley and Patterson
production
of 230Th can
be determined and J
He,
(1995)
lOBe, 230Th are equally
particle reactive, the 3He
and
lOBe ratio with
respect
to
23°Th allows
reconst. of sediment
focussing.
Terrestrial Parameters
terrestrial
46
eolian dust
accumulation is
indicator of wind
Biscaye (1965);
input
proportional to wind
strength and direction
Samtheinet al. (l98Ia);
strength and direction and climate change in
the source region
47
pollen
representation
of the
indicator of wind
Heusser (1985);
vegetation
strength or fluvial input, Hooghiemstra et a1.
and climatic change in
(1986);
Dupont (in
the source region
press)
488 freshwater
extent of Jakes,
ariditylhumidity
Pokras (1991);
diatoms
fluvial input
Gasse et al. (1989)
48b phytoliths
silica bodies formed in 1) indicator of eolian
Bukry (1980);
cells (mainly grasses)
and fluvial input
Romero et al. (1999)
probably for strength
2) the shape
of the
and as a grazing
phytolith reflects the
defense
shape of the cell and can
thus be used
taxonomically as well (=>
dinaate change)
48c macerals
organic remains
of
Smith and Hollibaugh
terrestrial plants
(1993);
Tayloret aI. (1998)
49
clay minerals
see 25
see
25
Petschick et al. (1996)
Precision (lab.
AccuracyJ
reproducib.)
I :SHe isotopic comp.:
?
:15%
[He]: ±1O%
(Marcantonio
et al.
1995)
qualitative
taxonomy
qualitative
taxonomy
qualitative
taxonomy
qualitative
taxonomy
?
see 25
qualitative
Pitfalls
1) He production is not constant
(Farley and Patterson 1995)
2) particle reactivity of J
He and
23"Th may be different
sedimentary disturbance,
winnowing
non-linear relationship between
pollen and vegetation; identification
of transport mechanisms
time lag in the registration of lakes
(after desiccation)
as yet little experience
see 25
n
;:;Dl
SO
(">
(l)
§
::r:
l
t»
III
::!.
(l)
...,
o
iii
:;;!
~.
o
...,
4'
~
~.
0\
....,
Proxy
Basic assumption(s/ Empirical relationship
Selected reference(s)"
sediment
45
Hei'~::rh;
He and I
Be are
if the "cosmic input" of
Marcantonio et a1.
focussing
IOBeI'JOTh
fonned by cosmic ray 3He and lOBe is constant
(1996; 1995);
spallation reactions at over the time interval
Farley (1995);
a constant rate
under consideration and Farley and Patterson
production
of 230Th can
be determined and J
He,
(1995)
lOBe, 230Th are equally
particle reactive, the 3He
and
lOBe ratio with
respect
to
23°Th allows
reconst. of sediment
focussing.
Terrestrial Parameters
terrestrial
46
eolian dust
accumulation is
indicator of wind
Biscaye (1965);
input
proportional to wind
strength and direction
Samtheinet al. (l98Ia);
strength and direction and climate change in
the source region
47
pollen
representation
of the
indicator of wind
Heusser (1985);
vegetation
strength or fluvial input, Hooghiemstra et a1.
and climatic change in
(1986);
Dupont (in
the source region
press)
488 freshwater
extent of Jakes,
ariditylhumidity
Pokras (1991);
diatoms
fluvial input
Gasse et al. (1989)
48b phytoliths
silica bodies formed in 1) indicator of eolian
Bukry (1980);
cells (mainly grasses)
and fluvial input
Romero et al. (1999)
probably for strength
2) the shape
of the
and as a grazing
phytolith reflects the
defense
shape of the cell and can
thus be used
taxonomically as well (=>
dinaate change)
48c macerals
organic remains
of
Smith and Hollibaugh
terrestrial plants
(1993);
Tayloret aI. (1998)
49
clay minerals
see 25
see
25
Petschick et al. (1996)
Precision (lab.
AccuracyJ
reproducib.)
I :SHe isotopic comp.:
?
:15%
[He]: ±1O%
(Marcantonio
et al.
1995)
qualitative
taxonomy
qualitative
taxonomy
qualitative
taxonomy
qualitative
taxonomy
?
see 25
qualitative
Pitfalls
1) He production is not constant
(Farley and Patterson 1995)
2) particle reactivity of J
He and
23"Th may be different
sedimentary disturbance,
winnowing
non-linear relationship between
pollen and vegetation; identification
of transport mechanisms
time lag in the registration of lakes
(after desiccation)
as yet little experience
see 25
n
;:;Dl
SO
(">
(l)
§
::r:
l
t»
III
::!.
(l)
...,
o
iii
:;;!
~.
o
...,
4'
~
~.
0\
....,