Abundance, distribution and bioavailability of major and trace elements in surface sediments from the Cai River estuary and Nha Trang Bay (South China Sea, Vietnam)

2017 ◽  
Vol 198 ◽  
pp. 450-460 ◽  
Author(s):  
S.E. Koukina ◽  
N.V. Lobus ◽  
V.I. Peresypkin ◽  
O.M. Dara ◽  
A.V. Smurov
Keyword(s):  
Trace Elements ◽  
South China Sea ◽  
South China ◽  
Surface Sediments ◽  
River Estuary ◽  
Major And Trace Elements ◽  
Abundance Distribution ◽  
China Sea ◽  
Nha Trang Bay

Fine scale study of major and trace elements in the Fe-Mn nodules from the South China Sea and their metallogenic constraints

2019 ◽  
Vol 416 ◽  
pp. 105978 ◽  
Author(s):  
Yao Guan ◽  
Yingzhi Ren ◽  
Xiaoming Sun ◽  
Zhenglian Xiao ◽  
Zhongwei Wu ◽  
...  
Keyword(s):  
Trace Elements ◽  
South China Sea ◽  
South China ◽  
Major And Trace Elements ◽  
The South China Sea ◽  
Fine Scale ◽  
The South ◽  
China Sea

scholarly journals Multi-proxy assessment of surface sediments using APPI-P FTICR-MS reveals a complex biogeochemical record along a salinity gradient in the Pearl River estuary and coastal South China Sea

2021 ◽  
Author(s):  
Jagos Radovic ◽  
Wei Xie ◽  
Renzo Silva ◽  
Thomas Oldenburg ◽  
Stephen Larter ◽  
...  
Keyword(s):  
Organic Matter ◽  
South China Sea ◽  
South China ◽  
Surface Sediments ◽  
River Estuary ◽  
Pearl River ◽  
Sampling Point ◽  
China Sea ◽  
Fticr Ms ◽  
The Pearl River

The Pearl River drains the second largest watershed in China, funnelling large amounts of freshwater and organic matter into the northern part of the South China Sea through an estuary characterized by pronounced biogeochemical gradients. In this study we analyzed organic extracts of surface sediments collected along land-sea transect that captures a transition from freshwater environment at the site of the Pearl River discharge, to marine settings at the most distal sampling point in the coastal South China Sea. Samples were analyzed using Fourier transform ion cyclotron mass spectrometry (FTICR-MS), to assess the molecular composition of the organic species present in the sediment and understand the sources and diagenesis of deposited organic matter. Results show a complex mixture of molecular markers, many of which can be used as proxies to distinguish between the freshwater and saline settings. For example, geochemical signal at the freshwater site is notably characterized by species belonging to hydrocarbon and sulphur-containing compound classes – these are likely markers of terrestrial, natural and/or anthropogenic organic matter inputs. On the other hand, samples from the coastal marine site bear a unique signature of putative tetrapyrrole species, molecular indicators of phytoplankton phaeopigments. Notably, some unusual and or novel species, such as sterenes and alkanones were putatively identified. These and other biomarkers species that can be detect using our single injection method provide convenient multiple proxies necessary for interpreting dynamic changes from land to the ocean, which have even been complicated by anthropogenic activities.

DISTRIBUTION OF THE CLAY MINERALS IN SURFACE SEDIMENTS OF THE SOUTH CHINA SEA AND THEIR PROVENANCE

2010 ◽  
Vol 30 (4) ◽  
pp. 57-66 ◽  
Author(s):  
Qian GE ◽  
Fengyou CHU ◽  
Jingpu LIU ◽  
Yuansheng DU ◽  
Zuo XUE ◽  
...  
Keyword(s):  
South China Sea ◽  
Clay Minerals ◽  
South China ◽  
Surface Sediments ◽  
The South China Sea ◽  
The South ◽  
China Sea

Morphology and bloom dynamics of Cochlodinium geminatum (Schütt) Schütt in the Pearl River Estuary, South China Sea

Harmful Algae ◽  
2012 ◽  
Vol 13 ◽  
pp. 10-19 ◽  
Author(s):  
Ping-Ping Shen ◽  
Ya-Nan Li ◽  
Yu-Zao Qi ◽  
Lv-Ping Zhang ◽  
Ye-Hui Tan ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Pearl River ◽  
China Sea ◽  
The Pearl River Estuary ◽  
The Pearl River

scholarly journals Clay Mineralogy and Geochemistry of the Pockmarked Surface Sediments from the Southwestern Xisha Uplift, South China Sea: Implications for Weathering and Provenance

Geosciences ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 8
Author(s):  
Mei Zhang ◽  
Hongfeng Lu ◽  
Qing Chen ◽  
Gayan Bandara ◽  
Hui Zhang ◽  
...  
Keyword(s):  
South China Sea ◽  
Clay Minerals ◽  
South China ◽  
Surface Sediments ◽  
Northern South China Sea ◽  
Clay Mineralogy ◽  
Xrd Analysis ◽  
Average Weight ◽  
X Ray ◽  
China Sea

In the northern South China Sea, pockmarks are widely distributed on the seabed offshore on the southwestern Xisha Uplift. The mineralogy and geochemistry of the clay minerals and surface sediments from the pockmark field were identified using X-ray diffraction (XRD) analysis and X-ray fluorescence (XRF) analysis to trace the provenance, weathering, and sediment transportation system in the area. The clay minerals are primarily comprised of illite, smectite, kaolinite, and chlorite, showing a distribution of average weight percentages of 35%, 35%, 18%, and 13%, respectively. Based on the surrounding fluvial drainage basins and various transport mechanisms (current or monsoon), illite and chlorite primarily originate from rivers in Taiwan and the Mekong and Red Rivers. Kaolinite primarily originates from the Pearl River, and smectite derived from the Luzon arc system is primarily transported by surface currents with significant influence from the Kuroshio intrusion.

A preliminary study on sediment records of possible typhoon in the northern South China Sea during the past 6500 yr

The Holocene ◽  
2021 ◽  
pp. 095968362110032
Author(s):  
Pingyuan Li ◽  
Mingkun Li ◽  
Huayang Gan ◽  
Zhen Xia
Keyword(s):  
South China Sea ◽  
South China ◽  
Southern China ◽  
Northern South China Sea ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Human Beings ◽  
China Sea ◽  
The Pearl River ◽  
China Coast

Typhoon is an important meteorological phenomenon that affects the living and development of human beings on the southern China coast. However, there is still lack of clarity in the paleo-typhoon history and its influence on the evolution of the ancient human settlement environment since the mid-Holocene. Here, we identify six typhoon-like deposits from a core retrieved from the northern South China Sea shelf, close to the Pearl River Estuary, based on accelerated mass spectrometry 14C dating, grain size, and geochemistry. The sand fractions, CaO, Sr, SiO2/TiO2, and SiO2/Al2O3 were used to indicate the typhoon-like deposits. Results show that the ages with high-frequency typhoons are present ~200–300 cal yr BP, ~800–1000 cal yr BP, ~1500–1700 cal yr BP, ~2000–2100 cal yr BP, ~2400–2500 cal yr BP, and ~2700–3000 cal yr BP. Our results are comparable to the records from adjacent regions. Significantly, the vast tides occurred in the duration of ~2700–3000 cal yr BP in southern China, which probably caused the ancestors’ migration to the inland. Further studies are needed to deeply study the paleo-typhoon history in the southern China coast to verify our results.

scholarly journals Microbial diversity in the hydrate-containing and -free surface sediments in the Shenhu area, South China Sea

2015 ◽  
Vol 6 (4) ◽  
pp. 627-633 ◽  
Author(s):  
Lu Jiao ◽  
Xin Su ◽  
Yuanyuan Wang ◽  
Hongchen Jiang ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Free Surface ◽  
South China Sea ◽  
Microbial Diversity ◽  
South China ◽  
Surface Sediments ◽  
Shenhu Area ◽  
China Sea
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