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| 1 | Tectonic Evolution of the Meso-Tethys in the Western Segment of Bangonghu-Nujiang Suture Zone: Insights from Geochemistry and Geochronology of the Lagkor Tso Ophiolite显示文摘The subduction of the Bangonghu-Nujiang Meso-Tethys and the collision between the Lhasa and Qiangtang blocks were important events in the growth of the Tibetan crust. However,the timing of collision initiation and closure timing,as well as nature and structure of the Bangonghu ocean basin,are still poorly constrained. The Lagkor Tso ophiolite,located in the south of Gerze County,Tibet,is one of the most completed ophiolites preserved in the southern side of the BangonghuNujiang suture zone. This study discussed the tectonic evolution of the Bangonghu-Nujiang suture zone as revealed by the Lagkor Tso ophiolite investigated by field investigations,petrology,geochemistry,geochronology and tectonic analysis methods. We present new LA-ICP-MS zircon U-Pb and 39Ar/40 Ar ages for the Lagkor Tso ophiolite,in addition to geochemical and platinum-group element(PGE) data presented for the Lagkor Tso ophiolite in Tibet. It is suggested that the ancient Lagkor Tso oceanic basin split in Middle Jurassic(161.2 ± 2.7 Ma – 165.4 ± 3.5 Ma),and experienced a second tectonic emplacement during the Early Cretaceous(137.90 ± 6.39 Ma). The Lagkor Tso ophiolite likely developed in an independent suture zone. The Bangonghu-Nujiang ocean subducted southwards,and the dehydration of the subducting oceanic crust materials caused partial melting of the continental mantle wedge,which formed the second-order expanding center of the obduction dish. This led to inter-arc expansion,followed by the formation of inter-arc and back-arc basins with island arc features,which are represented by ophiolites around the Shiquanhe-Lagkor Tso-Yongzhu region. The tectonic environment presently can be considered to be similar to that of the current Western Pacific,in which a large number of island arc-ocean basin systems are developed. | YUAN Yajuan YIN Zhengxin LIU Weiliang HUANG Qiangtai LI Jianfeng LIU Hongfei WAN Zhifeng CAI Zhourong XIA Bin | 2015 | Acta Geologica Sinica(English Edition)2015，89，2： | 17 |
| 2 | Development features of volcanic rocks of the Yingcheng Formation and their relationship with fault structure in the Xujiaweizi Fault Depression,Songliao Basin,China显示文摘The Xujiaweizi Fault Depression is located in the northern Songliao Basin,Northeast China.The exploration results show that the most favorable natural gas reservoirs are in the volcanic rocks of the Yingcheng Formation(K 1 yc).Based on seismic interpretation,drill cores and the results of previous research,we analyzed the distribution of faults and the thickness of volcanic rocks in different periods of K 1 yc,and studied the relationship of volcanic activities and main faults.Volcanic rocks were formed in the Yingcheng period when the magma erupted along pre-existing fault zones.The volcanic activities strongly eroded the faults during the eruption process,which resulted in the structural traces in the seismic section being diffuse and unclear.The tectonic activities weakened in the study area in the depression stage.The analysis of seismic interpretation,thin section microscopy and drill cores revealed that a large number of fractures generated in the volcanic rocks were affected by later continued weak tectonic activities,which greatly improved the physical properties of volcanic reservoirs,and made the volcanic rocks of K 1 yc be favorable natural gas reservoirs.The above conclusions provide the basis to better understand the relationship of the volcanic rock distribution and faults,the mechanism of volcanic eruption and the formation of natural gas reservoirs in volcanic rocks. | Cai Zhourong Huang Qiangtai Xia Bin Lii Baofeng Liu Weiliang Wan Zhifeng | 2012 | Petroleum Science2012，9，4： | 5 |
| 3 | Geochemistry,Geochronology,Sr-Nd Isotopic Compositions of Jiang Tso Ophiolite in the Middle Segment of the Bangong- Nujiang Suture Zone and Their Geological Significance显示文摘The Jiang Tso ophiolite,situated in the middle segment of the Bangong- Nujiang Suture Zone,is a part of the easternmost Qieli Lake ophiolite subzone and is close to the south of Pung Lake ophiolite. The rock association of Jiang Tso ophiolite is relatively complete and is mainly composed of metamorphic peridotite,gabbro and diabase. Comparing with N-MORB,the ophiolite is high in Mg and low in Ti,K,Na,P,and is depleted in Nb,Ta,Hf,Th and enriched in Rb,Sr and Ba. Geochemical characteristics of the Jiang Tso ophiolite indicate it is of a supra-subduction zone type formed in the spreading ridge of back arc basin. The SHRIMP U-Pb dating of zircons from the gabbro yielded a weighted average age of 188.1±4.1 Ma(MSWD=1.4),indicating the Jiang Tso ophiolite was formed in the late stage of early Jurassic. The Sr,Nd isotopic compositions show that the Tethyan mantle domain is the depleted mantle(DM),with enriched mantle domain II(EM II). They have the same Sr,Nd isotopic composition with the India Ocean MORB type. | HUANG Qiangtai LI Jianfeng CAI Zhourong XIA Lianze YUAN Yajuan LIU Huichuan XIA Bin | 2015 | Acta Geologica Sinica(English Edition)2015，89，2： | 4 |
| 4 | Geochronology of the Dong Tso Ophiolite and the Tectonic Environment显示文摘The wedge shaped Dong Tso ophiolitic block is distributed near the transition point from the western to the middle sub–belt of the Bangong–Nujiang suture zone.The ophiolite is characterized by well–developed cumulate rocks that are mainly composed of cumulate and massive gabbros.In the cumulate gabbros,the adcumulate amphiboles are distributed extensively around the plagioclase and residual pyroxene grains;hence,the rocks are named adcumulate amphibole–gabbro.In this study,the formation age of the ophiolite has been estimated to be 166±4 million years(Ma)by the sensitive high–resolution ion microprobe(SHRIMP)II U–Pb isotopic analysis of the zircons from the adcumulate amphibole–gabbro;the40Ar/39Ar plateau age was estimated to be 148.19±1.53 Ma,which should represent the emplacement time of the ophiolite,by isotopic dating of the pure amphibole mineral from the amphibole–schist.Two different suits of volcanic lavas have been recognized in this work.The purple colored pillow basalts have high TiO2and P2O5contents,and are rich in light rare earth elements(LREEs),large–ion lithospheric elements(LILEs)and high–field–strength elements(HFSEs),the characteristics that are the typical of the oceanic island basalt(OIB).On the other hand,other massive basaltic andesites of celadon color are poor in MgO;rich in Fe2O3,LREEs,LILEs,and HFSEs;and especially characterized by negative Nb and Ta anomalies,the properties that establish the andesites as continental arc volcanic rocks.It is concluded that hotspots had developed in the old Dong Tso basin,the oceanic basin that had been developing from middle Jurassic(166 Ma)or even before and emplaced northward in late Jurassic(about 148 Ma). | LI Jianfeng XIA Bin XIA Lianze XU Lifeng LIU Weiliang CAI Zhourong YANG Zhiqing | 2013 | Acta Geologica Sinica(English Edition)2013，87，6： | 2 |
| 5 | Highly dispersible cerium-oxide modified Ni/SBA-15 for steam reforming of bio-mass based JP10显示文摘Ni/SBA-15 modified by highly dispersed cerium-oxide was prepared with the aid of sucrose for steam reforming of JP10(C_(10)H(16)).Their characterization showed that addition of appropriate amount ceria led to the formation of highly dispersed CeO_(2)and Ni,and the CeO_(2)covered smaller nickel particles like strawberry seeds to form much more interface between them.Their catalytic activity exhibited higher stability over time on stream of 6.5 h with conversion higher than 95%and higher carbon resistance(mass loss less than 4.5%by TG),which may derive from good properties below:(1)much more interface enhanced cooperation effect and increased turnover frequency at the interface;(2)the stronger interaction between Ni and ceria to suppress sintering by formation of Ni-O-Ce solid solution;(3)the large amount of oxygen vacancies from the formation of Ni-O-Ce solid solution and highly dispersed CeO_(2)to facilitate the water-gas-shift reaction and carbon removal. | Haocui Zhang Zhourong Xiao Mei Yang Jijun Zou Guozhu Liu Xiangwen Zhang | 2022 | Chinese Journal of Chemical Engineering2022，35，3： | 1 |
| 6 | Study on Design Rainstorm Profile in Liuzhou City:Chicago Method显示文摘The design rainstorm profile is the basis of scientifically and rationally planning and designing urban drainage system,which can provide scientific theoretical basis and accurate design parameters for municipal construction,water and planning departments. In this paper,the minute-minute rainfall process data at Liuzhou National Meteorological Observation Station from 1975 to 2014 were used. Chicago method was used to analyze and study design rainstorm profile in urban district of Liuzhou,and the profiles of the rainfalls lasting for 30,60,90,120,150,and 180 min were obtained. The results showed that the design rainstorm profile with the same duration in each reappearance period was consistent in Liuzhou,and short-time rainfall profile roughly showed single-peak shape. The peak of each short-time design rainstorm profile was almost in 1/3 part of the whole rainfall process,and the intensity of rainfall increased with the prolonging of the recurrence period. The rainfall intensity at the peak in the same reproducing period showed ' decrease-increase-decrease' as the duration increased,and the peak value of rainfall lasting for 120 min was the maximum. | Xie Dong Su Xiaoling Liu Lei Liang Chunrong Liu Zhourong Li Yu Lan Qiu Ren Le | 2018 | Meteorological and Environmental Research2018，9，4： | 0 |
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