臺灣珊瑚礁保育研究─子計畫六:沈積物對珊瑚群聚結構和珊瑚生長形態的影響(I)
Date Issued
2000
Date
2000
Author(s)
DOI
892621Z002022
Abstract
The Pleistocene coral reefs in SW
Taiwan developed on several structural
highs. It is uncertain that how these coral
reefs built up in a noncarbonate
environment that dominated by finegrained
siliciclastics. Based on studies
of the outcrops and 21 drilling cores, we
recognized cold-seep carbonates from
those outcrops of E Takangshan and SE
Hsiaokangshan. The upper parts of
cold-seep carbonates of the former
consist of encrusting coralline algae and
scleractinian corals, then overlaid by
bioclastic limestone. Besides, we also
found lithified calcareous mudstone
pebbles and cobbles near or at the tops
of “soft” Gutingkeng mudstone in 5 and
2 boreholes of Takangshan and
Panpingshan respectively. The same
phenomenon occurred at the outcrop of
SE Hsiaokangshan. It seems that those
2
pebbles and cobbles derived from other
cold-seep carbonates. As yet we did
not see any cold-seep carbonates at the
outcrops of Shoushan. According to
the detailed descriptions by Hayasaka
(1932), the limestones of Shoushan and
Chiahsien that contain abundant Loripes
bivalves is likely the so-called “coldseep
carbonates." Based on these
findings, we propose that there were
some cold-seep carbonates developed
during the shallowing of structural highs
in SW Taiwan and these carbonates
served as the consolidated substrates for
the development of coral reefs in a
noncarbonate environment.
Subjects
sedimentation
coral reef
reef development
cold-seep carbonates
Publisher
臺北市：國立臺灣大學海洋研究所
Type
report
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