Journal
JOURNAL OF MARINE SCIENCE AND ENGINEERING
Volume 10, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/jmse10020142
Keywords
detrital zircon; sediment provenance; Okinawa Trough
Categories
Funding
- National Natural Science Foundation of China [91958213]
- International Partnership Program of Chinese Academy of Sciences [133137KYSB20170003]
- Special Fund for the Taishan Scholar Project of the Shandong Province [ts201511061]
- National Special Fund for the 13th Five Year Plan of COMRA [DYI35-G2-01-02]
- National Basic Research Program of China [2013CB429700]
- Natural Science Foundation of Shandong Province [ZR2019QD016]
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The provenance of sediments in the Southern Okinawa Trough has been a controversial issue. Using zircon U-Pb geochronology, this study found that sediments from the Yangtze River/East China Sea shelf have significantly contributed to the trough in the past 624 years. The presence of ancient zircon grains suggests a possible supply from older orogenic belts.
The provenance of sediments in the Southern Okinawa Trough since the late Holocene has been a controversial scientific issue during the past 20 years. Previous studies based on isotope proxies generally indicated Taiwanese rivers as the primary source in the Southern Okinawa Trough since the late Holocene. Based on the zircon U-Pb geochronology, this study identified how sediments from the Yangtze River/East China Sea shelf had contributed significantly to the Southern Okinawa Trough in the past 624 a BP. Notably, this study found two Paleoarchean zircon grains, which indicated they originated from older orogenic belts. These data shed new light on the provenance of sediments, and a partial supply from the mainland of China cannot be excluded.
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