Pollen ages and depths in ODP Site 184-1144

DOI

A high-resolution pollen record (sampling interval averages 820 years) has been obtained from ODP Site 1144 (water depth 2037 m), northern South China Sea. The 504-m sequence (in composition length) covers the last 1.03 million years according to micropaleontological and isotopic stratigraphy. The pollen assemblages are characterized by high proportions of Pinus and herb pollen, and by their frequent alternations. Based on these alternations, 29 pollen zones have been recognized that are closely correlated to the Marine Oxygen Isotope Stages (MIS) 1-29. Pinus- dominant pollen zones correspond to interglacial periods with lighter delta18O values, while herb-marked ones relate to the heavier delta18O stages assigned to glacials. Judging from the pollen data, the exposed northern continental shelf of the South China Sea during the glacials was covered by grassland, and the extensive northern shelf has formed only since MIS 6 (ca. 150 ka), probably as a result of tectonic subsidence. Tree pollen influx values are indicative of winter monsoon which began to intensify 600 ka ago. The summer monsoon variations can be approximated by the fern percentage within the total pollen and spore abundance, and the result shows high values in general occurring at interglacials, with the maxima at MIS 15, 5e and 1. The relatively high fern percentage with smaller amplitude in variations before 600 ka might suggest more stable humid conditions before the intensification of winter monsoon.

Supplement to: Sun, Xiangjun; Luo, Yunli; Huang, Fei; Tian, Jun; Wang, Pinxian (2003): Deep-sea pollen from the South China Sea: Pleistocene indicators of East Asian monsoon. Marine Geology, 201(1-3), 97-118

Identifier
DOI https://doi.org/10.1594/PANGAEA.738719
Related Identifier IsSupplementTo https://doi.org/10.1016/S0025-3227(03)00211-1
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.738719
Provenance
Creator Sun, Xiangjun; Luo, Yunli; Huang, Fei; Tian, Jun ORCID logo; Wang, Pinxian
Publisher PANGAEA
Publication Year 2003
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (117.419 LON, 20.053 LAT); South China Sea
Temporal Coverage Begin 1999-03-13T00:00:00Z
Temporal Coverage End 1999-03-18T00:00:00Z