Development of East Asian summer monsoon environments in the late Miocene; radiolarian evidence from Site 1143 of ODP Leg 184

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doi: 10.1016/S0025-3227(03)00215-9
Author(s): Chen Muhong; Wang Rujian; Yang Lihong; Han Jianxiu; Lu Jun
Author Affiliation(s): Primary:
Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou, China
Other:
Tongji University, China
Ministry of Territory Resources, China
Volume Title: Asian monsoons and global linkages on Milankovitch and sub-Milankovitch time scales
Volume Author(s): Clemens, Steven C., editor; Wang Pixian; Prell, Warren L.
Source: Marine Geology, 201(1-3), p.169-177; Asian monsoons and global linkages on Milankovitch and sub-Milankovitch time scales, Beijing, China, May 9-11, 2001, edited by Steven C. Clemens, Wang Pixian and Warren L. Prell. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0025-3227 CODEN: MAGEA6
Note: In English. 41 refs.; illus., incl. 1 table, sketch map
Summary: Abundant radiolarians are preserved in the relatively complete upper Miocene section of ODP Site 1143. Three radiolarian zones, RN6, RN7 and RN8, are recognized on the basis of Diartus petterssoni (total range in RN6, <11.9-8.77 Ma), Diartus hughesi (last appearance at RN7/RN8, 7.7 Ma) and Stichocorys delmontensis (RN6 to RN8, >6.7 Ma). Variations in the abundance of radiolarians, especially Pyloniid forms, radiolarian flux and species diversity are good proxies of upwelling which, similar to today's, was likely driven by summer monsoons. These radiolarian paleomonsoon proxies indicate that the east Asian summer monsoon first initiated close to the middle/late Miocene boundary at ∼12-11 Ma and reached a maximum strength at ∼8.24 Ma. Therefore, the initiation of the east Asian summer monsoon was likely earlier than the first Indian monsoon, which appeared ∼8 myr ago. Abstract Copyright (2003) Elsevier, B.V.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Asia; Biozones; Cenozoic; Cores; Far East; Invertebrata; Leg 184; Marine sediments; Microfossils; Miocene; Monsoons; Neogene; North Pacific; Northwest Pacific; ODP Site 1143; Ocean Drilling Program; Pacific Ocean; Paleo-oceanography; Paleoclimatology; Protista; Radiolaria; Seasonal variations; Sediments; South China Sea; Tertiary; Upper Miocene; West Pacific
Coordinates: N092143 N092143 E1131707 E1131707
Record ID: 2003074935
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands