Distribution Patterns of Major and Trace Elements and Provenance of Surface Sediments on the Continental Shelf off Western Guangdong Province and Northeastern Hainan Island

Abstract. This paper is the first contribution to the knowledge of pteropods in surficial sediments of the entire western continental shelf of India. Both qualitative and quantitative analyses of pteropod assemblages were carried out on 50 coarse fractions (>125 μm) of topmost portions of grab samples recovered along 12 transects covering the inner shelf to the upper slope (30–200 m water depths). The distribution of eight significant species was mapped. The resultant maps were correlated with the bathymetric, hydrographic and aragonite preservation conditions in the investigated area. This study reveals a bathymetric control over the distribution of Limacina inflata, Creseis acicula and Creseis chierchiae across the shelf. Furthermore, a marked difference in vertical salinity gradient from south to north along the shelf appears to have a profound influence on the abundance of these species. The pteropod shells in sediments of the northern offshore region with anoxic bottom conditions are generally well preserved, unlike the southern region, where oxygen concentration of the bottom water is relatively high enough to cause dissolution or even elimination of many shells of the most susceptible pteropods like C. acicula and C. chierchiae. The variation in the intensity of the oxygen minimum zone along the western continental shelf of India has significant influence upon the distribution pattern of Clio convexa.

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Mobilization and re-distribution of major and trace elements during extreme weathering of basalt in Hainan Island, South China

Geochimica et Cosmochimica Acta ◽

10.1016/j.gca.2007.03.035 ◽

2007 ◽

Vol 71 (13) ◽

pp. 3223-3237 ◽

Cited By ~ 160

Author(s):

Jin-Long Ma ◽

Gang-Jian Wei ◽

Yi-Gang Xu ◽

Wen-Guo Long ◽

Wei-Dong Sun

Keyword(s):

Trace Elements ◽

South China ◽

Hainan Island ◽

Major And Trace Elements

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Behavior of major and trace elements in an extreme weathering profile on basalt in Hainan Island, South China

Geochimica et Cosmochimica Acta ◽

10.1016/j.gca.2006.06.766 ◽

2006 ◽

Vol 70 (18) ◽

pp. A379 ◽

Cited By ~ 1

Author(s):

J.L. Ma ◽

G.J. Wei ◽

Y.G. Xu ◽

W.G. Long

Keyword(s):

Trace Elements ◽

South China ◽

Hainan Island ◽

Major And Trace Elements ◽

Weathering Profile

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Geochemistry and environmental assessment of major and trace elements in the surface sediments of the Wei River, China

Journal of Environmental Monitoring ◽

10.1039/c2em30269a ◽

2012 ◽

Vol 14 (10) ◽

pp. 2762 ◽

Cited By ~ 8

Author(s):

Y. M. Han ◽

J. J. Cao ◽

F. Wu ◽

B. C. Zhang ◽

C. L. Zhan ◽

...

Keyword(s):

Trace Elements ◽

Environmental Assessment ◽

Surface Sediments ◽

Major And Trace Elements ◽

Wei River

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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)

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2016.03.005 ◽

2017 ◽

Vol 198 ◽

pp. 450-460 ◽

Cited By ~ 13

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

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Studies on the Composition Characteristics of Pyrite from Dabaoshan Polymetallic Ore Deposit, Northern Guangdong Province

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.904.180 ◽

2014 ◽

Vol 904 ◽

pp. 180-183 ◽

Cited By ~ 2

Author(s):

Wen Chun Fu ◽

Hui Bin Pan ◽

Zhi Qiang Kang

Keyword(s):

Trace Elements ◽

Guangdong Province ◽

Atomic Ratio ◽

Major And Trace Elements ◽

Reference Standard ◽

Ore Deposit ◽

Standard Value ◽

Polymetallic Ore ◽

Northern Guangdong ◽

Composition Characteristics

Pyrite composition characteristics can reflect its physical and geochemical formation backgrounds, also are the important parameters to further discuss the genesis of minerals and ore deposit. In this paper, major and trace elements of 13 pyrite samples from Dabaoshan polymetallic ore deposit were analyzed using EPMA, the results suggest that S/Fe atomic ratio of pyrite in dacitic porphyries were similar with reference standard value, however that ratio in granodioritic porphyries is 2.051, which is slightly higher than the reference standard value; trace elements Cu, Zn and Pb show the characteristic of high oxygen fugacity settings, the Co content in pyrite was significantly lower than that of Ni, and Co/Ni is far less than 1, all the evidences show the characteristics of sedimentation-reformation ore deposit.

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