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| 1 | Origin of CO_2 in natural gas from the Triassic Feixianguan Formation of Northeast Sichuan Basin显示文摘The natural gas from the Triassic Feixianguan Formation of Northeast Sichuan Basin contains high H2S whereas relatively low CO2 concentrations and the CO2 display high δ13C values (ranging from -5.81‰ to 3.3‰ (PDB)). This seems to contradict the conventional wisdom that TSR should be a primary source of CO2 in natural gas from the Feixianguan Formation. In contrast, many authigenic calcite samples from these sites display very low δ13C values (ranging from -18.4‰ to -10.3‰ (PDB)). This suggests that the carbon from TSR source dominated the formation of calcite whereas the carbon from inorganic source came into CO2 in natural gas. In order to assess the origin of CO2 from these H2S-rich sites, we have calculated the relative contributions of organic and inorganic carbon sources to the CO2 and authigenic calcite. The organic carbon source possibly originated from TSR, whereas the inorganic one might be generated from marine carbonates dissolution. This calculation is based on the carbon isotopic compositions of CO2 and authigenic calcite as well as an isotopic mass balance. The results show that the contribution of organic carbon source to the CO2 is only 2%, whereas that to authigenic calcite is as high as 43% on average. Such results combined with thermodynamic evidence indicate that the isotopically light CO2 produced by TSR process may contribute to authigenic calcite precipitation during burial diagenesis. Distinguishable from Ordovician reservoir of Tarim Basin, Feixianguan reservoir of Northeast Sichuan Basin experienced rapid tectonic uplift due to Yanshanian movement after TSR occurred. Such tectonic event could induce temperature decrease and further promote carbonates dissolution. During these processes, secondary porosity has developed in Feixianguan carbonate reservoirs. Therefore, much attention should be paid to the structural highs in search of high quality carbonate reservoirs. | HUANG SiJing, HUANG KeKe, TONG HongPeng, LIU LiHong, SUN Wei & ZHONG QianQian State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China | 2010 | Science China Earth Sciences2010，53，5： | 7 |
| 2 | First discovery and characterizations of late Cretaceous seep carbonates from Xigaze in Tibet,China显示文摘Hydrocarbon seeps,widely occurring in continental margins,have become increasingly focused owing to their close relationships with gas hydrates,strong greenhouse gas methane,and biological resources in extreme environments.Ancient hydrocarbon seeps have already been recognized from Devonian to Quaternary strata worldwide based on seep carbonates or seep-related fossil chemosynthetic assemblages.However,seep-related deposits are rarely found from ancient strata in the China's Mainland.Here,we report the first discovery of an ancient seep deposit,specifically late Cretaceous seep carbonates from Xigaze in Tibet,China.Xigaze seep carbonates,occurring as nodules,are enclosed in upper Cretaceous turbidite strata in Xigaze forearc basin.These carbonates are composed of authigenic carbonate(56.2% on average),clastic quartz and feldspar(27.3% on average),and clay minerals(chlorite,illite and smectite,16.5% on average).Clotted micrites,peloids and framboid pyrites are frequently observed,all of which are common in modern seep carbonates.The carbonates have negative δ13 C values varying from 27.7‰ to 4.0‰(V-PDB),suggesting that thermogenic methane is the primary carbon source.Ce/Ce* values revised by eliminating La effects show no real Ce anomaly,indicating the carbonates were primarily precipitated in a weak reducing environment.Overall,these features provide unequivocal evidences that the seafloor of Xigaze forearc basin developed hydrocarbon seeps in late Cretaceous. | TONG HongPeng CHEN DuoFu | 2012 | Chinese Science Bulletin2012，57，33： | 6 |
| 3 | MicroRNA-92a Functions as an Oncogene in Colorectal Cancer by Targeting PTEN显示文摘 | Guangjun Zhang He Zhou Huaxu Xiao Zuoliang Liu Hongpeng Tian Tong Zhou | 2014 | Digestive Diseases and Sciences2014，，1： | 1 |
| 4 | Clinical significance of miR-22 expression in patients with colorectal cancer显示文摘 | Guangjun Zhang Shusen Xia Hongpeng Tian Zuoliang Liu Tong Zhou | 2012 | Medical Oncology2012，，： | 1 |
| 5 | Catalytic conversion of glucose to 5-hydroxymethylfurfural over SO 4 2? /ZrO 2 and SO 4 2? /ZrO 2 –Al 2 O 3 solid acid catalysts显示文摘 | Hongpeng Yan Yu Yang Dongmei Tong Xi Xiang Changwei Hu | 2009 | Catalysis Communications2009，，11： | 1 |
| 6 | Overexpression of miR-92a correlates with tumor metastasis and poor prognosis in patients with colorectal cancer显示文摘 | Tong Zhou Guangjun Zhang Zuoliang Liu Shusen Xia Hongpeng Tian | 2013 | International Journal of Colorectal Disease2013，，1： | 1 |
| 7 | Catalytic conversion of glucose to 5-hydroxymethylfurfural over SO2 -/ZrO2 and SO,2 - / ZrO2-Al2O3 solid acid catalysts 显示文摘 | Yan Hongpeng Yang Yu Tong Dongmei | 2009 | Catalysis Communications2009，，10： | 1 |
| 8 | Catalytic conversion of glucose to 5-hydroxymethylfurfural over SO4^2-/ZrO2 and S042-/ ZrO2-Al2O3 solid acid catalysts显示文摘 | Yan Hongpeng Yang Yu Tong Dongmei | 2009 | Catal Commun2009，10，： | 1 |
| 9 | KITES SOAR IN THE SPRING BREEZE显示文摘The breeze begins to warm Beijing in March,bringing spring into the city This is also the season for fying kites.In China,the mere mention of kites often brings to mind a famous poem by Qing Dynasty(1644-1911)poet Gao Ding(1828-1880);the poem describes children rushing back home after school to fly kites in the early spring breezes. | Zhang Hongpeng Tong Xizheng(Photos) Wang Jianzhong(Photos) Xiu Yuchen(Photos) Yan Yusheng(Photos) Zhang Xin(Photos) | 2021 | Beijing2021，，10： | 0 |
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