Neoproterozoic stratigraphic comparison of the Lesser Himalaya (India) and Yangtze block (south China): Paleogeographic implications

Publication Type  Journal Article
Year of Publication  2003
Authors  Jiang, G. Q.; Sohl, L. E.; Christie-Blick, N.
Journal Title  Geology
Volume  31
Issue  10
Pages  917-920
Journal Date  Oct
ISBN Number  0091-7613
Accession Number  ISI:000185692200022
Key Words  neoproterozoic; lesser himalaya; india; south china; stratigraphic comparison; tectonic reconstruction; paleomagnetic pole; break-up; nw india; rodinia; laurentia; australia; geochronology; magmatism; craton; belt
Abstract  

Recent studies of terminal Neoproterozoic rocks (ca. 590-543 Ma) in the Lesser Himalaya of northwestern India and the Yangtze block (south China) reveal remarkably similar facies assemblages and carbonate platform architecture, with distinctive karstic unconformities at comparable stratigraphic levels. These similarities suggest that south China may have been located close to northwestern India during late Neoproterozoic time, an interpretation permitted by the available, yet sparse paleomagnetic data. Additional parallels in older rocks of both blocks-similar rift-related siliciclastic-volcanic successions overlying metamorphic basement, and comparable glaciogenic intervals of possibly Sturtian and Marinoan or Varanger age-suggest that this spatial relationship may have developed earlier in the Neoproterozoic. With the exception of basal Cambrian phosphorite and comparable small shelly fossils, stratigraphic contrasts between northern India and south China and increasing biogeographic affinity between south China and northwestern Australia suggest that south China may have migrated toward northwestern Australia during the Cambrian.

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