Skip to main content

Radiolarian Successional Sequences and Rare Earth Element Variations in Late Paleozoic Chert Sequences of South China: An Integrated Approach for Study of the Evolution of Paleo-Ocean Basins

Buy Article:

$63.00 plus tax (Refund Policy)

Abstract:

Radiolarian ecological diagnoses and rare earth element (REE) criteria are sensitive indicators of the evolution of paleo-ocean basins. We examined the radiolarian succession and biozonation, as well as the ΣREE, Lan/Cen and Ce/Ce* of chert samples from the Early Carboniferous to Middle Permian chert sequences in South China. Six radiolarian ecological facies (REFs) are distinguished: (1) a clear pelagic REF,with eupelagic radiolarians assemblage and the lowest Ce/Ce* (0.33–0.60, average 0.45); (2) a transitional REF containing mixed radiolarian assemblage of eupelagic and bathyal taxa and a moderate Ce/Ce* (0.67–0.76, average 0.73); (3) a convergent continental margin REF containing bathyal radiolarians and a higher Ce/Ce* (0.73–0.79, average 0.76); (4) a divergent bathyal REF containing bathyal radiolarians and a variable Ce/Ce* (0.52–0.97, average 0.75); (5) a rifted-trough REF, with monotonous radiolarians and the highest Ce/Ce* (0.77–0.85, average 0.81); and (6) a crisis event REF containing mutated radiolarians as well as extreme and variation Ce/Ce* values. Stacking of genesis-related REFs allowed for analysis of a radiolarian successional sequence (RSS) corresponding to an evolutionary cycle in a paleo-ocean basin. The complete RSS consisted of a basal rifted trough REF underlain by a crisis event REF, a lower divergent bathyal REF, a middle clear pelagic REF, and an upper transitional, possibly a convergent continental margin REF.

Keywords: CHERT; LATE PALEOZOIC; PALEO-OCEAN BASINS; RADIOLARIAN SUCCESSIONAL SEQUENCE; RARE EARTH ELEMENTS; SOUTH CHINA

Document Type: Research Article

DOI: https://doi.org/10.1080/01490450290098531

Publication date: 2002-07-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more