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| 1 | Rare earth element and yttrium compositions of the Paleoproterozoic Yuanjiacun BIF in the Lüliang area and their implications for the Great Oxidation Event(GOE)显示文摘In China, most Precambrian banded iron formations(BIFs) are situated in the North China Craton. The Yuanjiacun iron deposit, located in the Lüliang area, is arguably the most representative Superior-type BIF. This iron deposit is coherent with the sedimentary rock succession of the Yuanjiacun Formation in the lower Lüliang Group, and was interpreted to be deposited at 2.3–2.1 Ga, based on ages of overlying and underlying volcanic strata. This age overlaps with the time range of the Great Oxidation Event(GOE, 2.4–2.2 Ga). The Yuanjiacun BIF consists mainly of subhedral-xenomorphic magnetite and quartz and rarely other minerals with a lower degree of metamorphism, from greenschist to lower amphibolite facies. The geochemical characteristics of this BIF are similar to those of Superior-type BIFs. Prominent positive La, Y, and Eu anomalies normalized by the Post Archean Australian Shale(PAAS) indicate that the primary chemical precipitate is a result of solutions that represent mixtures of seawater and high-T hydrothermal fluids. The contamination from crustal detritus found is negligible based on low abundances of Al2O3 and TiO2(<0.5%) and of trace elements such as Th, Hf, Zr, and Sc(<1.5 ppm), as well as the lack of co-variations between Al2O3 and TiO2. In particular, the Yuanjiacun BIF samples do not display significant negative Ce anomalies like those of the Archean iron formations, but rather, the Yuanjiacun BIF samples exhibit prominent positive Ce anomalies, low Y/Ho ratios, and high light to heavy REE((Pr/Yb)SN) ratios, which are essentially consistent with the late Paleoproterozoic(<2.0 Ga) BIFs around the world. These characteristics of the Yuanjiacun BIF samples imply that the ancient ocean(2.3–2.1 Ga) was redox-stratified from oxic shallow water to deeper anoxic water. The specific redox conditions of the ancient ocean may be related to the GOE, which gave rise to the oxidation of Ce and Mn in the upper water, and to the presence of a Mn oxide shuttle in the ocean, resulting in varying REE patterns due to the precipitation and dissolution of this Mn oxide shuttle under different redox states. Therefore, the Yuanjiacun BIF appears to have formed near the redoxcline and lower-level reduced marine water. | WANG ChangLe ZHANG LianChang LAN CaiYun DAI YanPei | 2014 | Science China Earth Sciences2014，57，10： | 13 |
| 2 | Catalyst-Free Growth of Nanographene Films on Various Substrates显示文摘我们开发了一个新方法在各种各样的底层上直接种一致 graphene 电影,例如绝缘体,半导体,甚至金属,没有使用任何催化剂。生长用遥远的血浆改进化学药品蒸汽免职(r-PECVD ) 被执行在相对低的温度的系统,启用 graphene 电影的免职直到 4 英寸的晶片规模。扫描通道显微镜学(STM ) 证实电影由在侧面的尺寸的十纳米的 nanocrystalline graphene 粒子组成。为 nanographene 的生长机制为 PECVD 方法种的钻石类似于那,尽管有在 graphene 的情况中被形成的 sp2 碳原子而非象在钻石的 sp3 碳原子。这条生长途径简单、便宜、可伸缩,并且可能在象薄电影电阻器,煤气的传感器,电极材料,和透明传导性的电影那样的域里有潜在的应用程序。 | Lianchang Zhang Zhiwen Shi Yi Wang Rong Yang Dongxia Shi Guangyu Zhang | 2011 | Nano Research2011，4，3： | 12 |
| 3 | Sm-Nd and Rb-Sr isotopical ages of magnetite-chlorite formation gold deposit in the volcanic rock area of Late Paleozoic Era,East Tianshan显示文摘Through studying geo-geochemical characteristics and determining Sm-Nd and Rb-Sr isotopical ages in the Kanggur magnetite-chlorite formation gold deposit, some conclusions can be achieved: Sm-Nd isochron age is (290.4 ±7)Ma, Rb-Sr isochron age is (282.3 ±5)Ma, mineralization is Late Hercynian and the formation of this gold deposit is related to the macro- | Jinsheng Ji Huaqin Li Lianchang Zhang Xingke Yang Chengyou Feng | 1999 | Chinese Science Bulletin1999，44，19： | 5 |
| 4 | Geochemical Characteristics of Wuyang Siliceous Rocks in the Southern Margin of North China Craton and its Constraint on the Formation Environment of BIF of Tieshanmiao Formation显示文摘Precambrian banded iron formation(BIF)is one of the most important mineral resources in China,mostly abundant in the North China Craton(NCC)with relatively less common in South China.Since the BIF and siliceous rocks both originated from chemical deposition,the syngenetic BIF and Siliceous rocks can help evaluate their environment of formation.We examine here the mineralogy and geochemistry of siliceous rocks associated with the Tieshanmiao Formation BIF,aiming to decipher the conditions of formation of both BIF and Siliceous rocks in the Wuyang area in the NCC.Analysis of the geochemical characteristics of whole rock shows that the Si O2 content of the siliceous rock ranges from 90.11%to 94.85%and is relatively high overall.Trace element contents of Ba and U are also high,the Ba/Sr ratio ranges from 3.89 to 25.28 and the U/Th ratio ranges from 0.09 to 0.20.Finally,theΣREE value of rare earth elements ranges from 57.03 ppm to 152.59 ppm,and these indexes all indicate that siliceous rock resulted from hydrothermal deposition.Plots of Al2 O3-Si O2,Si O2/(K2 O+Na2 O)-Mn O2/Ti O2 and Mn-10×(Cu+Co+Ni)-Fe in discrimination diagrams also verify this interpretation.However,both the Mg O content,ranging from 0.16 to 0.32,and the Fe/Ti ratio,ranging from 2.50 to 9.72,suggest that terrigenous material was added during the depositional process.Major and trace element parameters of siliceous rock,such as the Al/(A1+Fe+Mn)ratio(from 0.81 to 0.93),Mn O/Ti O2(from 0.00 to 0.17),Al/(Al+Fe)(from 0.82 to 0.93),Sc/Th ratio(from 0.21 to 0.50),U/Th(from 0.09 to 0.20),(La/Yb)N(from 0.83 to 3.04),and the(La/Ce)N(from 0.01 to 0.02)all imply that the siliceous rock formed in a continental margin.In addition,the Sr/Ba ratio from 0.08 to 0.26,theδCe value from 0.31 to 0.90,and theδEu value from 0.14 to 0.58,all indicate that the siliceous rock was formed at a relatively deeper water depth and under weak hydrodynamic conditions.Siliceous rock and BIF formed in the same geological setting,with the Si O2/(K2 O+Na2 O)ratio of siliceous rock ranging from 28.61 to 47.43,the Si O2/Al2 O3 ratio from 16.53 to 32.37,and the Si O2/Mg O ratio from 287.28 to 592.81,which are all in agreement with chemical deposition associated with volcanic eruptions.The Al2 O3/Ti O2 ratio from 37.82 to 50.30 indicates that the magma source of siliceous rock was of slightly intermediate composition.During the Late Archean in the Wuyang area,the high concentration and high purity Si O2 quickly precipitated from hydrothermal fluids to finally result in the accumulation of siliceous rock in a marginal sea,while the input corresponding to iron formation components was deposited to form iron formation layers,and limestone was only the product formed during the deposition intervals of siliceous rock and iron formations.In this study,the synsedimentary siliceous rocks of BIF act as a new way to provide direct evidence to understand the formation environment of BIF due to its high geochemical stability. | LI Hongzhong HE Junguo LIANG Jin YANG Fei ZHAI Mingguo ZHANG Lianchang Voudouris PANAGIOTIS | 2019 | Acta Geologica Sinica(English Edition)2019，93，6： | 2 |
| 5 | Zircon U–Pb age, Hf isotopes and geochemistry of Shuichang Algoma-type banded iron-formation, North China Craton: Constraints on the ore-forming age and tectonic setting显示文摘 | Xiaojing Zhang Lianchang Zhang Peng Xiang Bo Wan Franco Pirajno | 2011 | Gondwana Research2011，，1： | 1 |
| 6 | Contrasting styles of mineralization in the Chinese Altai and East Junggar, NW China: implications for the accretionary history of the southern Altaids显示文摘 | Wan Bo Xiao Wenjiao Zhang Lianchang Windley Brian F Han Chunming Quinn Cameron D | 2011 | Journal of the Geological Society2011，，： | 1 |
| 7 | Characteristics and genesis of Kanggur gold deposit in the eastern Tianshan mountains,NW China:evidence from geology,isotope distribution and chronology显示文摘 | Zhang Lianchang Shen Yuanchao Ji Jinsheng | 2003 | Ore Geology Reviews2003，23，： | 1 |
| 8 | Paleozoic accretionary and collisional tectonics of the eastern Tianshan (China):Implications for the continental growth of central Asia显示文摘 | Xiao Wenjiao Zhang Lianchang Qin Kezhang | 2004 | American Journal of Science2004，304，： | 1 |
| 9 | Types, geological features and geodynamic significance of gold-copper deposits in the Kanggurtag metallogenic belt, eastern Tianshan, NW China显示文摘 | Zhang Lianchang Xiao WenJiao Qin Kezhang | 2004 | International Journal of Earth Science2004，93，： | 1 |
| 10 | Lamproites and kimberlites in China and the genesis of diamond deposit显示文摘 | Houjun Mei Chunjing Tang Sunrong Li Yongming Li Xingchun Zhang Dengrong Lu Lianchang Zhang | 1998 | Science in China Series D: Earth Sciences1998，，1： | 1 |
| 11 | Mineralogical and microfabric characteristics of magnetite in the Wuyang Precambrian BIFs, southern North China Craton: Implications for genesis and depositional processes of the associated BIFs显示文摘 | Hongzhong Li Mingguo Zhai Lianchang Zhang Zhijun Yang Argyrios Kapsiotis Yongzhang Zhou Junguo He Changle Wang Jin Liang | 2014 | Journal of Asian Earth Sciences2014，，： | 1 |
| 12 | Re–Os isotopic dating of molybdenite and pyrite in the Baishan Mo–Re deposit, eastern Tianshan, NW China, and its geological significance显示文摘 | Lianchang Zhang Wenjiao Xiao Kezhang Qin Wenjun Qu Andao Du | 2005 | Mineralium Deposita2005，，8： | 1 |
| 13 | Formation age and tectonic setting of the Shirengou Neoarchean banded iron deposit in eastern Hebei Province: Constraints from geochemistry and SIMS zircon U–Pb dating显示文摘 | Lianchang Zhang Mingguo Zhai Xiaojing Zhang Peng Xiang Yanpei Dai Changle Wang Franco Pirajno | 2011 | Precambrian Research2011，，： | 1 |
| 14 | A new method for proving chromatic uniqueness of graphs显示文摘 | Liu Ruying Zhao Lianchang | 1977 | Discrete Math1977，，171： | 1 |
| 15 | Re-Os isotopic dating of molybdenite and pyrite in the Baishan Mo-Re deposit,east- ern Tianshan, NW China, and its geological significance显示文摘 | Zhang Lianchang Xiao Wenjiao Qin Kezhang | 2005 | Mineralium Deposita2005，39，： | 1 |
| 16 | Optimal design im- proving a communication network reliability显示文摘 | Shao Fangming Zhao Lianchang | 1997 | Mi- croelectronics Reliability1997，37，4： | 1 |
| 17 | Formation age and tectonic setting of the Shirengou Neoarchean banded iron deposit in eastern Hebei Province: Constraints from geochemistry and SIMS zircon U–Pb dating显示文摘 | Lianchang Zhang Mingguo Zhai Xiaojing Zhang Peng Xiang Yanpei Dai Changle Wang Franco Pirajno | 2011 | Precambrian Research2011，，： | 1 |
| 18 | Paleozoic aecretionary and collisional tectonics of the eastern Tianshan (China): Implications for the lateral growth of central Asia 显示文摘 | Xiao Wenjiao Zhang Lianchang Qin Kezhang | 2004 | American Journal of Science2004，304，37： | 1 |
| 19 | Lamproites and kimberlites in China and the genesis of diamond deposit显示文摘 | Houjun Mei Chunjing Tang Sunrong Li Yongming Li Xingchun Zhang Dengrong Lu Lianchang Zhang | 1998 | Science in China Series D: Earth Sciences1998，，1： | 1 |
| 20 | Chromatically unique graphs显示文摘 | CHAO CY ZHAO LIANCHANG | 1979 | Discrete Math1979，27，： | 1 |
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