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Late Paleozoic depositional history of the Tarim basin, northwest China: an integration of biostratigraphic and lithostratigraphic constraints
This study provides the first detailed lithostratigraphic and biostratigraphic constraints for improving stratigraphic resolution for hydrocarbon prospecting and exploration in the Tarim basin. A total of 49 stratigraphic units (38 formations and 11 members), ranging in age from the latest Devonian to Permian, are reviewed or redefined in terms of nomenclatures, lithology, age constraints, and lateral distributions based on the detailed field works or newly published data. Of these, the Piqiang Formation (new formation) is proposed to include the reefal carbonates of Asselian-Sakmarian age from the northern Tarim. The subsurface upper Paleozoic stratigraphic framework of the desert areas of the basin is also established for the first time. The high-resolution, basinwide stratigraphic correlations reveal that the sedimentation of the basin in the late Paleozoic was extremely uneven. Of these, the Famennian to Changhsingian successions are completely recorded in the south-western margin areas of the basin. Here, five eustatic sedimentary cycles are well recognizable, suggesting the sedimentation was more eustatically controlled and little affected by local tectonism. The late Paleozoic successions of both Kalpin and Taklimakan regions are commonly interrupted by major hiatuses at various horizons, suggesting that the sedimentation was apparently modified by local tectonism. Of these, the northward movement of the Tarim block and its subsequent collision with the Yili microcontinent (part of the Kazakhstan plate) may be principally accountable for the discrepancy in the sedimentation of the various regions in the basin in the late Paleozoic.
History
Journal
AAPG bulletinVolume
87Issue
8Pagination
1323 - 1354Publisher
American Association of Petroleum GeologistLocation
Tulsa, OKPublisher DOI
ISSN
0149-1423eISSN
1558-9153Language
engPublication classification
C1 Refereed article in a scholarly journal; C Journal articleCopyright notice
2003, American Association of Petroleum GeologistsUsage metrics
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Keywords
PermianDevonianPaleozoiceustacytectonic controlspetroleum explorationlithostratigraphybiostratigraphysedimentary cyclesFamennianstratigraphic correlationSakmarianhydrocarbonsNorthwest ChinaTarim BasincarbonatesScience & TechnologyPhysical SciencesGeosciences, MultidisciplinaryGeologyNORTHERN TIBETAN PLATEAUNW CHINAWESTERN KUNLUNTECTONIC AMALGAMATIONTIEN-SHANXINJIANGBACHUBRACHIOPODSMOUNTAINSEVOLUTIONGeology
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