试论古全球构造与古生代油气盆地
NOTES ON ANCIENT GLOBAL TECTONICS AND PALEOZOIC PETROLIFEROUS BASINS
- 1983年4卷第1期 页码:1-33
网络首发:1983-03-25,
纸质出版:1983
DOI: 10.11743/ogg19830101
移动端阅览
网络首发:1983-03-25,
纸质出版:1983
移动端阅览
六十年代初
我曾指出今后寻找油气资源的工作重点将转向两种类型的盆地
一类是阿尔卑斯期(中新生代)的盆地
另一类则是受阿尔卑斯运动体制改造了的早期(古生代)盆地
[1]
。二十年来全世界油气资源的重大发现
都符合于这种设想。我国以往找油工作较多地着重于前一类盆地
成效显著
在后一类盆地中也有所发现。随着新的一轮油气普查工作的开展
前一类盆地固然还有很大的潜力
但后一类盆地势必受到更多的重视。本文拟在资料十分不足的情况下
对后一类即被改造了的我国古生代盆地的形成机制与性质略加探讨
以供今后实践的检验。
The author postulated about 20 years ago that petrolierous basings
as a specific kind of sedimentary basins
are the Products of geodynamic(geotectonical and geothermal)regimes which influence the globe as a whole and change with time throughout the geological history of the earth.As there are so many unidirectional changes in earth properties.it would not be unwise to consider the development of petroliferors basin an evolutionary instead of an uniformitaristic way
and to classify the Paleozoic and the Meso-Cenozoic basins on a dualistic basis in accordance with the respective regime of global tectonsics.For practical purposes
especiallyfot the evaluation of less-explored petroliferous basins.it is suggested(see fig.1 in Chinese text)to relate the 4M factors[material
maturity
migration versus nonmigration (trapping) and state of maintenance]
which control the location(L) and the potential quantity(Q) of oil and gas
to the 4S conditions(subsidence
sedimentation
stress and style)of a basin taken as a whole.The basin
in its turn
is composed of one or several prototypes(P) Which owe its existence to the mechanisms of formation determinative with the tectonic setting and the thermal regime prevailing at the time of thei
formation(3T).Consequently
we ought to be able topredict the habitat of petroleum in different basin types of different geological agesthrough the analysis of T
S
M
and to treat them with different thoughts and methods of prospecting.To group the Paleozoic basins with the Meso-Cenozoic intraplate basins under the general heading of"cratonic basins"as some current classification schemes do
seems to be inadequate and would not but lead to the disappointing statement that cratonic basins are"deceptively simple"
as they do not really be. "Plate tectonics offers a framework within which many of the processes of more recent continental evolution can be understood
but as we deal with increasingly ancient Portions of the continents
it is increasingly difficult to test the applicability of the plate-tectonic concepts".Continental tectonics
of which the development of "cratonic"basins and arches being important constituents
must be explainable asa part of a global geodynamic system
however
whose component processes may have changed through geological times.To reason with it
the author tends to differentiate on historical-geodynamical ground the formation of petroliferous basins since as early as late Proterozoic into 3 stages:1.The ancient global tectonic stage ranging in age from the break-up of the Proto-Supercontinent or Pangea E to the formation of Pangea B;2.An intermediate stage as the mobile Pangea B developped into Pangea A;and 3.A new global tectonics or plate tectonies stage related with the break-up of Pangea A in the latest 200 m.y.
京公网安备11010802024621
