Contrasting zircon Hf–O isotopes and trace elements between ore-bearing and ore-barren adakitic rocks in central-eastern China: Implications for genetic relation to Cu–Au mineralization

Lithos ◽  
2013 ◽  
Vol 156-159 ◽  
pp. 97-111 ◽  
Author(s):  
Fangyue Wang ◽  
Sheng-Ao Liu ◽  
Shuguang Li ◽  
Yongsheng He
Keyword(s):  
Trace Elements ◽  
Eastern China ◽  
Genetic Relation ◽  
Adakitic Rocks ◽  
O Isotopes ◽  
Central Eastern

Characterization of aerosol acidity at a high mountain site in central eastern China

2012 ◽  
Vol 51 ◽  
pp. 11-20 ◽  
Author(s):  
Yang Zhou ◽  
Likun Xue ◽  
Tao Wang ◽  
Xiaomei Gao ◽  
Zhe Wang ◽  
...  
Keyword(s):  
Eastern China ◽  
High Mountain ◽  
Aerosol Acidity ◽  
Mountain Site ◽  
Central Eastern

scholarly journals Source Identification of Trace Elements in Peri-urban Soils in Eastern China

2018 ◽  
Vol 11 (3) ◽  
pp. 195-207 ◽  
Author(s):  
Long Sun ◽  
Manus Carey ◽  
Lei Yang ◽  
Li-Ding Chen ◽  
Shou-Juan Li ◽  
...  
Keyword(s):  
Trace Elements ◽  
Source Identification ◽  
Urban Soils ◽  
Eastern China

Chemistry of Hf-rich zircons from the Laoshan I- and A-type granites, Eastern China

2000 ◽  
Vol 64 (5) ◽  
pp. 867-877 ◽  
Author(s):  
R. C. Wang ◽  
G. T. Zhao ◽  
J. J. Lu ◽  
X. M. Chen ◽  
S. J. Xu ◽  
...  
Keyword(s):  
Trace Elements ◽  
Electron Microprobe ◽  
Eastern China ◽  
Hydrothermal Activity ◽  
Type Granite ◽  
Last Stage

AbstractZircon commonly occurs as one of important accessory HFSE-bearing minerals in A-type granite. A detailed electron microprobe study was carried out on zircon from the Laoshan complex, Eastern China, which is composed of I- and A-type granites. Zircon from the I-type rocks is relatively poor in trace elements (HfO2<2 wt.%, UO2, ThO2 and Y2O3 <1 wt.%), but that from the A-type rocks is richer in Hf, U, Th and Y. Hafnian zircon with a HfO2 content of up to 12.37 wt.% was found in the arfvedsonite granite, which is considered the most evolved facies in the A-type suite. Enrichment in Hf is generally observed at the rims of zircon crystals relative to the cores. The Hf enrichment in zircon, and the association of exotic REE- and HFSE-bearing minerals are linked to hydrothermal activity, suggesting that during the last stage of crystallization of the A-type magma, fluids enriched in REE, HFSE, F−, CO32− and PO43− were released.

scholarly journals Relative pollen productivity estimates for major plant taxa of cultural landscapes in central eastern China

2017 ◽  
Vol 26 (6) ◽  
pp. 587-605 ◽  
Author(s):  
Furong Li ◽  
Marie-José Gaillard ◽  
Shinya Sugita ◽  
Florence Mazier ◽  
Qinghai Xu ◽  
...  
Keyword(s):  
Cultural Landscapes ◽  
Eastern China ◽  
Pollen Productivity ◽  
Central Eastern

scholarly journals Meridionally Extending Anomalous Wave Train over Asia During Breaks in the Indian Summer Monsoon

2019 ◽  
Vol 3 (3) ◽  
pp. 353-366 ◽  
Author(s):  
Uppara Umakanth ◽  
Ramesh K. Vellore ◽  
R. Krishnan ◽  
Ayantika Dey Choudhury ◽  
Jagat S. H. Bisht ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
General Circulation ◽  
Wave Train ◽  
Eastern China ◽  
Circulation Model ◽  
Cyclonic Circulation ◽  
The Arctic ◽  
Indian Landmass ◽  
Central Eastern

Abstract Anomalous interactions between the Indian summer monsoon (ISM) circulation and subtropical westerlies are known to trigger breaks in the ISM on subseasonal time-scales, characterised by a pattern of suppressed rainfall over central-north India, and enhanced rainfall over the foothills of the central–eastern Himalayas (CEH). An intriguing feature during ISM breaks is the formation of a mid-tropospheric cyclonic circulation anomaly extending over the subtropical and mid-latitude areas of the Asian continent. This study investigates the mechanism of the aforesaid Asian continental mid-tropospheric cyclonic circulation (ACMCC) anomaly using observations and simplified model experiments. The results of our study indicate that the ACMCC during ISM breaks is part of a larger meridional wave train comprising of alternating anticyclonic and cyclonic anomalies that extend poleward from the monsoon region to the Arctic. A lead–lag analysis of mid-tropospheric circulation anomalies suggests that the meridional wave-train generation is linked to latent heating (LH) anomalies over the CEH foothills, Indo-China, and the Indian landmass during ISM breaks. By conducting sensitivity experiments using a simplified global atmospheric general circulation model forced with satellite-derived three-dimensional LH, it is demonstrated that the combined effects of the enhanced LH over the CEH foothills and Indo-China and decreased LH over the Indian landmass during ISM breaks are pivotal for generating the poleward extending meridional wave train and the ACMCC anomaly. At the same time, the spatial extent of the mid-latitude cyclonic anomaly over Far-East Asia is also influenced by the anomalous LH over central–eastern China. While the present findings provide interesting insights into the role of LH anomalies during ISM breaks on the poleward extending meridional wave train, the ACMCC anomaly is found to have important ramifications on the daily rainfall extremes over the Indo-China region. It is revealed from the present analysis that the frequency of extreme rainfall occurrences over Indo-China shows a twofold increase during ISM break periods as compared to active ISM conditions.

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