14
3. Review of Literature
3.1
Geochemistry of Trace Elements in Sea Water
3.11
Composition.
solved or
The supply of elements found dis-
suspended in the sea
derived from
three basic sources:
weathering of the
atmosphere and
Forchhammer
(1865),
tion of sea water,
(1)
and
to be
the products of the
rocks from the land areas,
eruptions on the sea floor,
from the
can be considered
(2) volcanic
(3) materials contributed
from extra-terrestrial
in his memoir on
‘sources.
the chemical composi-
listed the various elements which, until
his time, had been detected in it.
Dittmar
(1884) gave mean
values for the composition of ocean waters over a wide geo-
graphic range, collected during the Challenger expedition.
Dittmar's average was taken,
as late as 1924 by Clarke in his
comprehensive survey of geochemistry,
as the best standard of
comparison for the composition of ocean salts.
Rankama and Sahama
(1950)
More recently,
and Goldberg (1957) have compiled
tables of the abundance of elements in sea water from the data
of the extensive analyses of the past several decades.
Zinc,
reported in
it has
the element investigated in this study, was first
sea water by Dieulafait
been well established as a
(1880).
minor
Since that time
constituent of gea