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| 1 | Early J_2 basalts in SE China:Incipience of large-scale late Mesozoic magmatism显示文摘Magmatism in SE China was dormant during 204―180 Ma, but was reactivated in 180― 170 Ma (early J2), and then became more and more intensive towards the end of early Cretaceous. The small-scale early J2 magmatism is the incipience to long-term and large-scale magmatism in this region. A near east-west (EW) trend volcanic belt was distributed across south Hunan, south Jiangxi and southwest Fujian was formed during early J2 time. Along this belt from the inland toward the coast, the lithology of basalts changes from alkali into tholeiite, and the amount of erupted volcanic rocks and the proportions of rhyolites coexisting with the basalts increase. On the basis of geochemical char- acteristics of these basalts, we infer that the melting degree of source rocks and the extent of frac- tional crystallization and crustal contamination all increased whereas the depth of mantle source de- creased from the inland to the coast, which led to the variations of geological characteristics of the volcanic belt. In early J2, the western spreading Pacific plate began to subduct underneath SE China continental block, reactivating near EW trend deep fault that was originally formed during the Indos- inian event. The stress of the western spreading Pacific plate and the extent of asthenosphere up- welling increased from the inland to the coast, which is consistent with the generation and evolution of early J2 basalts. | XIE Xin1, XU Xisheng1, ZOU Haibo2, JIANG Shaoyong1, ZHANG Ming3 & QIU Jiansheng1 1. State Key Laboratory of Mineral Deposit Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China 2. Department of Earth and Space Sciences, University of California at Los Angeles, Los Angeles, CA90095-1567, USA. 3. GEMOC ARC National Key Centre, Department of Earth and Planetary Sciences, Macquarie University, Sydney, N.S.W. 2109, Australia | 2006 | Science China Earth Sciences2006，49，8： | 30 |
| 2 | Urban effects and summer thunderstorms in a tropical cyclone affected situation over Guangzhou city显示文摘With data mainly from Guangzhou mesonet Automatic Weather Stations(AWS),Guangzhou Doppler Radar and satellite TBB data,characteristics and evolution of the urban heat island(UHI) over Guang-zhou City were analyzed in a tropical cyclone affected situation for early August 2005.In particular,two thunderstorms occurring during this period respectively at the night of 4 August and in the afternoon of 7 August were investigated to study the relationships between the development of thunderstorms and the UHI.Results showed that two thunderstorms were associated with the UHI effects.UHI induced local air convergence and initiated the thunderstorm convections.Both cases showed a general agreement in time and space for the locations of maximum UHI,convergence,convection,and pre-cipitation.Convection was found to be more favorable to developing in time periods and locations with stronger intensity of UHI.Analysis also showed that,due to the urban effects,both thunderstorms got strengthened when moving over Guangzhou City,with maximum radar echoes observed right over the urban area and precipitation located within the city.All these features reveal that two thunderstorms were urban-induced storms. | MENG WeiGuang1,3,YAN JingHua1 & HU HaiBo2 1 Institute of Tropical and Marine Meteorology,Chinese Meteorological Administration(CMA),Guangzhou 510080,China 2 Institute of Urban Meteorology,CMA,Beijing 100089,China 3 State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China | 2007 | Science China Earth Sciences2007，50，12： | 8 |
| 3 | THz spectrum of reduced glutathione显示文摘The optical characteristics of reduced glutathione molecules between 0.2 THz and 2.4 THz have been investigated by THz time-domain spectroscopy (THz-TDS). The absorption characteristics and optical parameters of the reduced glutathione purged with Nitrogen at room temperature were obtained experimentally. The measured results were fitted well with the theoretical results computed by using Density Functional Theory (DFT) in far-infrared range. Also the conformation of the reduced glutathione molecule was simulated by Gaussian 03. This work has demonstrated significantly that THz-TDS spectroscopy can further be used to study other biological molecules in biological and biomedical engineering. | WANG Weining1, YAN Haitao1, YUE Weiwei1, ZHAO Guozhong1, ZHANG Cunlin1, LIU Haibo2 & ZHANG Xicheng2 1. Department of Physics, Capital Normal University, Beijing 100037, China 2. Center for Terahertz Research, Rensselaer Polytechnic Institute, Tory, NY, USA | 2005 | Science China(Physics,Mechanics & Astronomy)2005，48，5： | 1 |
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