And the sequence classification and regional correlation of Carboniferous in Lower Yangtse area are discussed. Results show that this area can be divided into 6 third,grade sequences (SQ1-SQ6),among which SQ1,SQ5,SQ6 belong to Type Ⅰ sequence; SQ2,SQ3,SQ4 to Type Ⅱ sequence.
The reservoirs are mainly developed in the datum-rising hemicycles of these sequences as SQ_1, SQ_2, SQ_3, SQ_4 and SQ_5, and the sequence interfaces of SB_1, SB_2, SB_3, SB_4 and SB_5 may be regarded as the dominant pathways of hydrocarbon lateral migration.
According to the identification of the sequence boundaries and the analysing results of biota and sedimentary facies on the Early Paleozoic stratigraphies, three mesosequences (SME1, SME2 and SME3), six sequence assemblages (SSA1, SSA2, SSA3, SSA4, SSA5, SSA6), and twenty-one sequences at least or T-R cycles (transgression-regression cycle) can be recognized in the Yangtze Gorges area.
The stratigraphic sequence of the Neogene in the area includes the middle Miocene Dongxuanguan Formation (N1d), late Miocene Liuhe Formation (N1l) and Huanggang Formation (N1h) and Pliocene Yuhuatai Formation (N2y), as well as an informal lithostratigraphic unit-the Fangshan basalt (fb).
The Lower Cretaceous Guangfeng in Jiangxi lies above the Shixi Formation of volcanic rock system with its Rb -Sr isochron a ge 124.51±11.9Ma,and it is a lake basin with a complete second grade stratigraphic sequence from prograding to degrading.
On the basis of systematic analysis of outcrops, well cores, log and seismic stratigraphy, the stratigraphic sequence of the Middle Jurassic in northern Chaoshui basin was divided into 4 third-order sequences and 2 second-order sequences.
Through comprehensive analysis of the residual strata sequence , sedimentary system and the structural deformation characteristics of different structural layers in the Luoyi-Yichuan basin, this paper have presented a fresh tectonic evolved process that the basin has experienced:1. the Caledonian uplift and denudation stage;
We shall construct a generating set of a nonfinitely generated Ga-invariant ring given in Freudenburg's counterexample by making use of an integral sequence which was constructed inductively by Freudenburg.
The classical Rudin-Shapiro construction produces a sequence of polynomials
A Generalized Sampling Theorem with the Inverse of an Arbitrary Square Summable Sequence as Sampling Points
In this article a generalized sampling theorem using an arbitrary sequence of sampling points is derived.
The mathematical concept of frames is utilized in the analysis of the properties of the sequence of sampling functions.
Using related sequences of Lucas numbers, other 3-manifolds are constructed, their geometric structures determined, and a curious relationship between the homology and the invariant trace-field examined.
This is done using a descending series associated to the complex structure and the Borel spectral sequences for the corresponding set of holomorphic fibrations.
Exact cohomology sequences with integral coefficients for torus actions
It is shown that the one-dimensional sampling sets correspond to Bessel sequences of complex exponentials that are not Riesz bases for $L^2[-R,R].$ A signal processing application in which such sampling sets arise naturally is described in detail.
A fundamental problem with the DWT, however, is the treatment of finite length data sequences.
The analysis of facies associations revealed that the formation was deposited as a symmetrical transgressive-regressive rock succession representing a common stratigraphic sequence.
The bottom of the stratigraphic sequence of the Dzhugdzhur deep-seated granulite complex was determined to consist of a stratified metabasite-enderbite association.
2(a), (b)), reflecting the evolutional difference of oceanic environment and stratigraphic sequence between the upper and lower layers separated by the depth of 160 cm.3.Through a correlation of δ18O values, the core from No.
Human beings' activities on tidal flat have disturbed the vertical distribution of sediments in stratigraphic sequence and accelerated the sedimentation rates.
Measurements of ground resistivity or radar surveys in a raster of 0.5 or 0.5×0.05?m, respectively, are used to gain information on archaeological structures and on the main stratigraphic sequence of sites covering up to 0.5?ha per day.