1.2 Tectonic Basin Classification
7
COLLISION-RELATED BASINS
REMNANT BASIN
INTRA MONTANE BASIN'
COLLISION-RELATED BASINS
FORELAND
PANNONIAN-TYPE
FOLD-THRUST ZONE
BASIN
BASIN (INTRAMONTANE B.)
l
FOLD-THRUST
+
. . . . . . . .
ZONE
MARINE
--~~~~
--C-::~
b
of very high sediment influx from the neighboring continent, however, they are for the most part filled up and
morphologically resemble a eontinental rise. Deep-sea
trenehes eommonly do not subside as do many other
basin types. In fact, they tend to maintain their depth
whieh is eontrolled mainly by the subduction meehanism, as weil as by the volurne and geometry of the
aeeretionary sediment wedge on their landward side
(Seet. 12.5.2).
Foreare basins oeeur between the treneh slope
break of the aeeretionary wedge and the magmatie front
of the are. The sub stratum beneath the center of such
basins usually eonsists of transitional or trapped oeeanie ernst older than the magmatie are and the
aeeretionary subduetion eomplex (Seet. 12.5.3). Rates
of subsidenee and sedimentation tend to vary, but may
frequently be high. Subsequent deformation of the sedimentary fill is not as intensive as in the aeeretionary
wedge.
Fig. 1.3a,b. Tectonic
classification of
eolliss ion-re lated
basins (Fig. 1.2 eontinued). See text for
explanation
Backarc and interare basins form by rifting and
oeean spreading either landward of an island are, or
between two island ares wh ich originate from the splitting apart of an older are system (Fig. l.2a). The evolution of these basins resembles that of normal oeean
basins between divergent plate motions. Their sedimentary fill frequently refleets magmatie aetivity in the are
regIOn.
Terrane-related basins are situated between mierocontinents consisting at least in part of eontinental erust
(Nur and Ben-A vraham 1983) and larger continental
blocks. The substratum of these basins is usually oeeanie erust. They may be bordered by a subduetion zone
and thus be assoeiated with basins related either to
subduetion or eollision.
Basins related to collision. Partial collision of eontinents with irregular shapes and boundaries wh ich do
not fit eaeh other leads to zones of crustal over- or
7
COLLISION-RELATED BASINS
REMNANT BASIN
INTRA MONTANE BASIN'
COLLISION-RELATED BASINS
FORELAND
PANNONIAN-TYPE
FOLD-THRUST ZONE
BASIN
BASIN (INTRAMONTANE B.)
l
FOLD-THRUST
+
. . . . . . . .
ZONE
MARINE
--~~~~
--C-::~
b
of very high sediment influx from the neighboring continent, however, they are for the most part filled up and
morphologically resemble a eontinental rise. Deep-sea
trenehes eommonly do not subside as do many other
basin types. In fact, they tend to maintain their depth
whieh is eontrolled mainly by the subduction meehanism, as weil as by the volurne and geometry of the
aeeretionary sediment wedge on their landward side
(Seet. 12.5.2).
Foreare basins oeeur between the treneh slope
break of the aeeretionary wedge and the magmatie front
of the are. The sub stratum beneath the center of such
basins usually eonsists of transitional or trapped oeeanie ernst older than the magmatie are and the
aeeretionary subduetion eomplex (Seet. 12.5.3). Rates
of subsidenee and sedimentation tend to vary, but may
frequently be high. Subsequent deformation of the sedimentary fill is not as intensive as in the aeeretionary
wedge.
Fig. 1.3a,b. Tectonic
classification of
eolliss ion-re lated
basins (Fig. 1.2 eontinued). See text for
explanation
Backarc and interare basins form by rifting and
oeean spreading either landward of an island are, or
between two island ares wh ich originate from the splitting apart of an older are system (Fig. l.2a). The evolution of these basins resembles that of normal oeean
basins between divergent plate motions. Their sedimentary fill frequently refleets magmatie aetivity in the are
regIOn.
Terrane-related basins are situated between mierocontinents consisting at least in part of eontinental erust
(Nur and Ben-A vraham 1983) and larger continental
blocks. The substratum of these basins is usually oeeanie erust. They may be bordered by a subduetion zone
and thus be assoeiated with basins related either to
subduetion or eollision.
Basins related to collision. Partial collision of eontinents with irregular shapes and boundaries wh ich do
not fit eaeh other leads to zones of crustal over- or