Hierarchical delineation and multivariate statistical discrimination of chemozones of the Cauvery Basin,south India:Implications on spatio-temporal scales of stratigraphic correlation

作     者：RAMKUMAR Mu. BERNER Z. STBEN D. RAMKUMAR Mu.1,BERNER Z.2 and STüBEN D.2 1 Department of Geology,Periyar University,Salem - 636011,India;Present Address:Institute of Palaeoenvironment,University of Erlangen-Nuernberg,D-91054 Erlangen,Germany 2 Institute of Mineralogy and Geochemistry,University of Karlsruhe,D-76128 Karlsruhe,Germany

作者机构：Department of GeologyPeriyar University Institute of PalaeoenvironmentUniversity of Erlangen-Nuernberg Institute of Mineralogy and GeochemistryUniversity of Karlsruhe 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2010年第7卷第4期

页      面：435-447页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：Acknowledgements We have benefited much from the constructive suggestions and modifications offered by the anonymous reviewers that have helped us presenting the data and interpretations in a lucid way. MR acknowledges the financial assistance of Alexander von Humboldt Foundation  Germany. Council of Scientific and Industrial Research  New Delhi  India provided financial support during field surveys. Currently research on chemostratigraphy of the Cauvery Basin is supported by Department of Science and Technology  New Delhi. Special thanks are due to the institute scientific personnel namely  Dr. Utz Kramar for TXRF analytical facilities  Dr. Karotke and Mrs. Oetzel for XRD analyses  Mr. Zrinkjack for carbon and sulphur analyses and Dr. Ott for computing facilities. Shri. T. Sreekumar  Geologist  OFl  Mumbai is thanked for assistance during the field survey. Permission to collect samples was accorded by the mines managers and geologists of Messers. Alagappa Cements  Chettiyar Mines  Dalmia Cements Pvt. Ltd.  Fixit Mines  Nataraj Ceramics Ltd.  Parveen Mines and Minerals Ltd.  Ramco Cements  Rasi Cements  TANCEM Mines  TAMIN Mines  Tan-India Mines  and Vijay Cements 

主　　题：Chemostratigraphy statistical discrimination petroleum exploration stratigraphic correlation 

摘      要：Success in locating oil pools in the Cauvery Basin,south India had been found to be based on the ability to delineate precisely the stratigraphic traps resulting from frequent sea level ***,recognition and delineation of them in terms of depositional units through conventional stratigraphic methods have been elusive owing to the limitations of such methods and lack of unified stratigraphic markers that could be traced at regional and basinal *** paper attempts to recognize depositional units in terms of chemozones,chronologic and lithostratigraphic units by assigning distinct geochemical *** signatures were assigned through hierarchical delineation and discriminant function *** is observed that individual depositional units could be recognized statistically with whole-rock geochemical *** strata under study show two second order chemozones comprising six major chemozones that in turn correspond to third order sea level cycles and minor chemozones at the scale of fourth order and/or further shorter sea level *** geochemical signatures showed 100% distinctness between sample populations categorized according to chronostratigraphy and *** durations of these stratigraphic units range from 18 million years to less than a million years and indicate distinct geochemical compositional change at different time *** implication and also due to the close correspondence between sea level variations reported from this basin and global sea level cycles,it is suggested that recognition and correlation of individual depositional units with distal counterparts could be made *** of these results is that stratigraphic units,at varying scales either temporally or spatially,could be assigned with unique geochemical signature,with which accurate prediction and correlation of similar units elsewhere is possible with measurable accuracy.