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Title
Remote sensing for resources development and environmental management
Author
Damen, M. C. J.

109
imestones and
detritics are
Larites (with
riassic age.
land, Miniloe
o series are
linas, algae,
dstone, tuffs,
the oldest
s by further
Hence, mainly
uperimposition
as the strong
'es impossible
5 same problem
niddle Miocene
pped when the
of the two
jhiolites and
deduced only
ve domains of
; of the rocks
acturation is
are N40-N170,
or trends are
N60, N120.
are distinctly
ition compared
the strongly
nized in the
photographs.
this fault on
to sub-recent
which conceal
^logical units
outlined by a
ts interpreted
confirm the
e. This might
lugan Fault to
uan Bay some
rference with
bs or reverse
suggest a second folding process which corresponds
to a late Miocene phase.
South-east, the contact between ophiolites and
Quaternary alluvia shows rectilinear segments
roughly N60E and N-S. They are referred to as
faults. The presence of alluvial fans suggests
important vertical movements which could be
explained by late extension faults at the back of
theo verthrust. Left lateral shifts along some N-S
faults are in agreement with observations at the
Ulugan and Rizal faults.
CONCLUSION
For this synthetic map, remotely sensed documents
are used as a basis to homogenize, verify,
reevaluate and extrapolate all the elements which
are finally reported. Satellite imagery is a useful
tool for integrating such diverse features as field
observations, seismic and well data and
bibliography.
Faults, fractures and joints are clearly expressed
on the images so that the tectonic pattern is
completed. Some hypothesis made on images about the
succession of phases, once localy confirmed by
microtectonics, can be extended to broad areas. On
such a map, it is important to clearly discriminate
confirmed and assumed data. Concerning Landsat
imagery, which is quite inadequate to tropical areas
it is shown that band 7 can bring useful
information. Good results in both lithology and
tectonics are mainly based on physiographic
observations. As already mentioned by Floyd and
Sabins (1980), the SIRA radar images provide good
lithological studies, but slopes and drainage
patterns are insufficiently detailed for precise
tectonic interpretation.
However dense vegetation and alteration of rocks
may induce many artefacts. For example, two
different series, with a similar lithology have the
same erosional soil and hence the same aspect on the
images which prevents any differentiation.
For such unknown areas, the use of MSS imagery is
very helpful in wide recognition work and it is an
interesting complement for synthesis study. However
many cases clearly show that field checking is
absolutely necessary. For this specific area, new
remotely-sensed features are obtained, i.e. the N-S
Rizal fault in north Palwan is clearly argumented
and this may reinforce the importance of N-S faults
in the area. The join pattern has been completed,
although some elements of difficult interpretation
require further investigations. Boundaries of the
lithological units characterized and redated by
field survey are more accurately mapped.
Mindoro to the Asian mainland and its significance
in the evolution of the South China Sea. Bull.
Amar. Ass. Petrol. Geol. 66. 9:1355-1383.
Leong, K.M. 1977. New age from radiolarian
chert-spillite formations. Geol. Soc. Malays.
Bull. 8:109-111.
Letouzey, J. L. Montadert & C. Muller. 1984. CIDOG -
Geology of Palawan and the Island of Balabac
(field work report 1983-84). Report IFP 27324.
Muller, C. & C.J. Daniel. 1981. Stratigraphical and
paleo-environmental studies (Oligocene-Quaternary)
in the Visayan Basin, Philippines. Newsl.
Stratigr. 10. 1:52-54.
GEOLOGICAL MAPS AND REPORTS
1982 - Geology and mineral resources of the
Philippines. Bureau of Mines and Geo-Sciences
Ministry of Natural Resources (1 map
1:2 500 000 scale).
1963 - Bureau of Mines - Philippines (geological map
1:1 000 000 scale).
MSS IMAGES
52
2
21
79
1
30
78
3
25
78
53
12
24
72
54
3
30
79
3
31
77
with a N30E
seems to be
' the second
which affect
nterpreted as
nic event,
deviations of
fracture zone
n on previous
tectonic event
d during the
one). Many
nations.
d only in the
nd bed-tracks
ative folding
'olding event,
leir asymmetry
REFERENCES
Balce, G. 1979. Explanatory text for the tectonic
map of the Philippines archipelago.
Floyd, F. & J.R. Sabins, 1983. Geologic
interpretation of space shuttle radar images of
Indonesia. AAPG Bull. 67. 11:2076-2099.
Fontaine, H. 1979. Note on the geology of the
Calamian Islands, North Palawan, Philippines. CC0P
News Letter. 6. 2:40-47.
Fricaud, L. 1984. Etude géologique et structurale de
la marge ouest Palawan (Mer de Chine méridionale).
Thesis. Paris.
Hashimoto, W. & T. Sato. 1973. Geological structure
of the Northern Palawan and its bearing on the
geological history of the Philippines. Geology and
Paleontology of South East Asia. 13:145-161.
Holloway, N.H. 1982. The stratigraphy and
relationship of Reed Bank, North Palawan and