SEQUENCE STRATIGRAPHY STUDY OF LAMU TRANSITION ZONE IN CORRELATION WITH MAFIA REGION, TANZANIA AND KRISHNA-GODAVARI BASIN, INDIA
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ABSTRACT

The sections of this area show the basin is filled with a carbonate build up of 2700m of carbonate build up in the graben and it is seen in other portions interlayerd with claystones and shale. The sedimentary section is seen to be derived from the surrounding landmasses.

The Cretaceous- Paleogene stratigraphy over the world is considered very instrumental in the oil and gas production of the world as source rock or reservoir rock see Appendix 1, Cari, Kikuchi, (1991), Raju, (2011) and Arthur, (1979). Relatively warm climate resulted in rising in eustatic levels in the Cretaceous period seen in figure. Limestone and shales formed in this era due to prevailing climatic and sedimentation conditions at that time, Wikipedia, (2013). Lamu transition zone has an abundance of sediments of this age as this project will demonstrate and a correlation will be done of this area Mafia region of Tanzania and Krishna Godavari Basin in India.

The emergence of modern sequence stratigraphy was originally based on seismic data in two important publications by Vail and his colleagues (as cited from Wilgus et al., 1988; Van Wagoner et al., 1990) and its applicability made to the study of outcrop geology. Sequence stratigraphy also made significant contributions to the interpretation of sequences in terms of the evolution of depositional systems. The subdivision of seismic sequences into systems tracts links facies characteristics to stages of the sea-level cycle and adds significant depth to the types of analyses. Basin elevation (and hence sea-level within the basin) is prone to significant influence by tectonism. It was pointed out by Carter et al. (1991) that sequence stratigraphy constituted two distinct components, a descriptive model of sequence architecture, and an interpretive model which related sequence development to eustatic control. The lines reveal the parasequences which has prospective continent-derived sedimentary section, which built seaward to form the hydrocarbon and gas hydrate habitat new offshore discoveries of the Miocene ages.

In the present work, the seismo-stratigraphic subdivision of the study area is correlated with the regional geology of Tanzania and with data from drilled wells within and in the periphery of the area. India’s correlation will be on the basis of eustatic sea changes over the periods due to climate change.