Sediment Provenance of the Nansha Trough Since 40 ka BP in the South China Sea: Evidence From delta C-13(org), TOC and Pollen Composition
Geochemical proxies in organic matter (OM) are considered to be reliable proxies for deciphering types of paleo-vegetation (C3 plants and C4 plants) and their abundance. The contributions of total organic carbon (TOC), stable carbon isotopes (delta C-13(org)), total nitrogen (TN) and organic carbon...
Published in: | Frontiers in Earth Science |
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Language: | English |
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Online Access: | http://ir.gig.ac.cn/handle/344008/50225 https://doi.org/10.3389/feart.2019.00110 |
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ftchacadscgigcas:oai:ir.gig.ac.cn:344008/50225 2023-05-15T17:34:41+02:00 Sediment Provenance of the Nansha Trough Since 40 ka BP in the South China Sea: Evidence From delta C-13(org), TOC and Pollen Composition Thilakanayaka, Vidusanka Luo Chuanxiu Rong Xiang Devendra, Dhanushka Dasanayaka, S. A. H. K. Jiang, Weiming Rahman, Ananna Kumar, Sazal Ariful, G. M. 2019-05-31 http://ir.gig.ac.cn/handle/344008/50225 https://doi.org/10.3389/feart.2019.00110 英语 eng FRONTIERS MEDIA SA FRONTIERS IN EARTH SCIENCE http://ir.gig.ac.cn/handle/344008/50225 doi:10.3389/feart.2019.00110 Geology Southern South China Sea TOC delta C-13(org) pollen deep ocean sediment provenance Geosciences Multidisciplinary SAN-FRANCISCO BAY ORGANIC-MATTER NORTH-ATLANTIC STABLE CARBON ASIAN MONSOON INDIAN-OCEAN LOW-LATITUDE C/N RATIOS PLEISTOCENE HOLOCENE 期刊论文 2019 ftchacadscgigcas https://doi.org/10.3389/feart.2019.00110 2020-12-22T07:22:33Z Geochemical proxies in organic matter (OM) are considered to be reliable proxies for deciphering types of paleo-vegetation (C3 plants and C4 plants) and their abundance. The contributions of total organic carbon (TOC), stable carbon isotopes (delta C-13(org)), total nitrogen (TN) and organic carbon to total nitrogen ratios (C/N) were obtained from a gravity core NS07-25 (6 degrees 39.945' N, 113 degrees 32.936' E, water depth 2006 m), extracted from the southern South China Sea (SCS). These data were used to reconstruct the climate changes of the Nansha Trough since 40 ka B.P. by comparing them with pollen data from the same core, and this comparison provides better sediment provenance details in the study area. During the periods between 37 and 27 ka, and from 12.5 ka to modern day, the majority of terrestrial sediment received from Borneo, and some climatic events have been governed by aeolian fluxes from mid-latitude areas (mainland China). These periods were relatively humid, compared to 27-12.5 ka, where the majority of terrestrial sediment came from the Sunda Shelf through riverine pathways. This study serves as the first study to correlate deep oceanic pollen and geochemical proxies in order to identify the weaken terrestrial OM signals in the deep ocean. Report North Atlantic Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) Indian Sunda ENVELOPE(-6.982,-6.982,62.205,62.205) Frontiers in Earth Science 7 |
institution |
Open Polar |
collection |
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchacadscgigcas |
language |
English |
topic |
Geology Southern South China Sea TOC delta C-13(org) pollen deep ocean sediment provenance Geosciences Multidisciplinary SAN-FRANCISCO BAY ORGANIC-MATTER NORTH-ATLANTIC STABLE CARBON ASIAN MONSOON INDIAN-OCEAN LOW-LATITUDE C/N RATIOS PLEISTOCENE HOLOCENE |
spellingShingle |
Geology Southern South China Sea TOC delta C-13(org) pollen deep ocean sediment provenance Geosciences Multidisciplinary SAN-FRANCISCO BAY ORGANIC-MATTER NORTH-ATLANTIC STABLE CARBON ASIAN MONSOON INDIAN-OCEAN LOW-LATITUDE C/N RATIOS PLEISTOCENE HOLOCENE Thilakanayaka, Vidusanka Luo Chuanxiu Rong Xiang Devendra, Dhanushka Dasanayaka, S. A. H. K. Jiang, Weiming Rahman, Ananna Kumar, Sazal Ariful, G. M. Sediment Provenance of the Nansha Trough Since 40 ka BP in the South China Sea: Evidence From delta C-13(org), TOC and Pollen Composition |
topic_facet |
Geology Southern South China Sea TOC delta C-13(org) pollen deep ocean sediment provenance Geosciences Multidisciplinary SAN-FRANCISCO BAY ORGANIC-MATTER NORTH-ATLANTIC STABLE CARBON ASIAN MONSOON INDIAN-OCEAN LOW-LATITUDE C/N RATIOS PLEISTOCENE HOLOCENE |
description |
Geochemical proxies in organic matter (OM) are considered to be reliable proxies for deciphering types of paleo-vegetation (C3 plants and C4 plants) and their abundance. The contributions of total organic carbon (TOC), stable carbon isotopes (delta C-13(org)), total nitrogen (TN) and organic carbon to total nitrogen ratios (C/N) were obtained from a gravity core NS07-25 (6 degrees 39.945' N, 113 degrees 32.936' E, water depth 2006 m), extracted from the southern South China Sea (SCS). These data were used to reconstruct the climate changes of the Nansha Trough since 40 ka B.P. by comparing them with pollen data from the same core, and this comparison provides better sediment provenance details in the study area. During the periods between 37 and 27 ka, and from 12.5 ka to modern day, the majority of terrestrial sediment received from Borneo, and some climatic events have been governed by aeolian fluxes from mid-latitude areas (mainland China). These periods were relatively humid, compared to 27-12.5 ka, where the majority of terrestrial sediment came from the Sunda Shelf through riverine pathways. This study serves as the first study to correlate deep oceanic pollen and geochemical proxies in order to identify the weaken terrestrial OM signals in the deep ocean. |
format |
Report |
author |
Thilakanayaka, Vidusanka Luo Chuanxiu Rong Xiang Devendra, Dhanushka Dasanayaka, S. A. H. K. Jiang, Weiming Rahman, Ananna Kumar, Sazal Ariful, G. M. |
author_facet |
Thilakanayaka, Vidusanka Luo Chuanxiu Rong Xiang Devendra, Dhanushka Dasanayaka, S. A. H. K. Jiang, Weiming Rahman, Ananna Kumar, Sazal Ariful, G. M. |
author_sort |
Thilakanayaka, Vidusanka |
title |
Sediment Provenance of the Nansha Trough Since 40 ka BP in the South China Sea: Evidence From delta C-13(org), TOC and Pollen Composition |
title_short |
Sediment Provenance of the Nansha Trough Since 40 ka BP in the South China Sea: Evidence From delta C-13(org), TOC and Pollen Composition |
title_full |
Sediment Provenance of the Nansha Trough Since 40 ka BP in the South China Sea: Evidence From delta C-13(org), TOC and Pollen Composition |
title_fullStr |
Sediment Provenance of the Nansha Trough Since 40 ka BP in the South China Sea: Evidence From delta C-13(org), TOC and Pollen Composition |
title_full_unstemmed |
Sediment Provenance of the Nansha Trough Since 40 ka BP in the South China Sea: Evidence From delta C-13(org), TOC and Pollen Composition |
title_sort |
sediment provenance of the nansha trough since 40 ka bp in the south china sea: evidence from delta c-13(org), toc and pollen composition |
publisher |
FRONTIERS MEDIA SA |
publishDate |
2019 |
url |
http://ir.gig.ac.cn/handle/344008/50225 https://doi.org/10.3389/feart.2019.00110 |
long_lat |
ENVELOPE(-6.982,-6.982,62.205,62.205) |
geographic |
Indian Sunda |
geographic_facet |
Indian Sunda |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
FRONTIERS IN EARTH SCIENCE http://ir.gig.ac.cn/handle/344008/50225 doi:10.3389/feart.2019.00110 |
op_doi |
https://doi.org/10.3389/feart.2019.00110 |
container_title |
Frontiers in Earth Science |
container_volume |
7 |
_version_ |
1766133600234766336 |