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| 1 | Zircon SHRIMP U-Pb Dating of the Tourmalinites from Boron-bearing Series of Borate Deposits in Eastern Liaoning and its Geological Implications显示文摘This paper focused on the zircon sensitive high resolution ion micro-probeU-Pb geochronology of the tourmalinites from boron-bearing series of borate deposits in Eastern Liaoning.The zircons commonly have core-rim structures,most cores show oscillatory zoning in cathodoluminescence and plane polarized light images,suggesting a magmatic detrital origin.Ages of the magmatic detrital zircons from the hyalotourmalite samples(N13) and(N14) are 2175±5Ma and 2171±9Ma,respectively.Moreover,metamorphic zircon from the sample(N13) shows an age of 1906±4Ma.Zircon core and rim from the hyalotourmalite sample(N02) record ages of 2171±6Ma and 1889±62Ma,which are explained as indicating the formation and metamorphic ages.Combined with the geological and geochemical studies,it can be concluded that the tourmalinites are formed during sedimentary exhalative mineralizations in the mid-Paleoproterozoic(~2170Ma) and underwent the metamorphism in the late-Paleoproterozoic(~1900Ma).The tourmalinites are the products of submarine acid volcanism in the extension rifting phase of the Liaoji Paleoproterozoic Rift,the rock-forming materials of which are derived from the mantle sources with recycling crustal contamination.The emergence of tourmalinites not only indicates the mid-Paleoproterozoic tectonic-magmatic processes,but also provides impetus,heat and material sources for the mineralization of borate deposits in Eastern Liaoning. | LIU Jingdang XIAO Rongge ZHANG Yanfei FAN Minghui WANG Shengzhi JIA Yuguo WANG Gang LIU Zhixue | 2012 | Acta Geologica Sinica(English Edition)2012，86，1： | 5 |
| 2 | Assessment of simulation biogas as a fuel for the spark ignition engine 显示文摘 | Huang Jingdang | 1998 | Puel1998，77，15： | 1 |
| 3 | Studies on preparation and property researches of EP/SiC thermal conductivity compo- sites显示文摘 | YajunLuo JingDang HuirongLi | 2009 | Polymer-Plastics Technology and Engineering2009，48，8： | 1 |
| 4 | Geochronology and Geochemistry of Late Triassic Intrusive Rocks in the Xiuyan Area,Liaodong Peninsula,Eastern North China Craton:Petrogenesis and Implications for Lithospheric Thinning显示文摘The timing and mechanisms of lithospheric thinning and destruction of the North China Craton(NCC)remain controversial,and the overall geodynamics of the process are poorly understood.This paper documents Late Triassic igneous rocks including monzogranite,gabbro,and diorite from the Xiuyan District on the Liaodong Peninsula in the eastern NCC,which have LA-ICP-MS zircon U-Pb ages of 229.0±0.4 Ma,216.2±0.9 Ma,and 210.6±2.0 Ma,respectively.Monzogranite shows high-SiO_(2) adakite affinity,negative ε_(Hf)(t)values(-20.6 to-17.9),and old T_(DM2) ages(3.53-3.29 Ga),suggesting that their parental magma was derived from thickened Paleoarchean mafic lower crust and minor mantle materials that were also involved their generation.Gabbro is ultrapotassic,strongly enriched in LREEs and LILEs,depleted in HFSEs,and has evolved zircon Hf isotopes with negative ε_(Hf) of -10.04 to-5.85 and old T_(DM2) ages(2.59-2.22 Ga).These are diagnostic signatures of a crustal component,but their high contents of Mg O,Cr,Co,Ni indicate that the primary magma originated from enriched mantle.Diorite is enriched in LILEs and LREEs,depleted in HFSEs(with negative Nb,Ta,and Ti anomalies),and contains negative ε_(Hf)(t)values(-13.64 to-11.01).Compared with the gabbro,the diorite is relatively enriched in Nb,Ta and HREEs,and also contains younger T_(DM2) ages(2.11-1.94 Ga),suggesting that the diorite was formed by mixing between ancient lower crust-derived felsic magmas and asthenospheric mantle-derived magmas.Field observations,geochronology,geochemistry,and zircon Lu-Hf isotopes indicate that Late Triassic magmatism and tectonic activity resulted from deep subduction of the Yangtze Craton beneath the NCC in the Xiuyan area.This phase of tectonic activity was completed in the eastern NCC by the Late Triassic(216 Ma),and was subsequently followed by lithospheric thinning that began in the Late Triassic. | ZHANG Yanfei DONG Yang XIAO Rongge LIU Jingdang ZHAO Baoju | 2021 | Acta Geologica Sinica(English Edition)2021，95，5： | 1 |
| 5 | Assessment of Simulation Biogas as a Fuel for the Spark Ignition Engine 显示文摘 | Huang Jingdang | 1998 | Fuel1998，77，15： | 1 |
| 6 | Assessment of Simulated Biogas as aFuel for the Spark Ignition Engine 显示文摘 | Huang Jingdang | 1998 | Fuel1998，77，15： | 1 |
| 7 | Assessment of simulation biogas as a fuel for the spark ignition engine显示文摘 | Huang Jingdang | 1998 | Fuel1998，77，15： | 1 |
| 8 | Thermal conductivity epoxy resin composites filled with boron nitride显示文摘 | JunweiGu QiuyuZhang JingDang ChaoXie | 2012 | Polym Adv Technol2012，，6： | 1 |
| 9 | Geology of the early Proterozoic boron deposits in eastern Liaoning,Northeastern China显示文摘 | Peng Qiming Feng Benzhi Liu Jingdang | 1993 | Resources Geology(Special Issue)1993，15，： | 1 |
| 10 | Assessment of Simulated Biogas as a Fuel for the Spark Ignition Engine显示文摘 | Huang Jingdang | 1998 | Fuel1998，77，15： | 1 |
| 11 | New Zircon U-Pb Ages of the Granodiorites in the Southern Great Xing’an Range and their Tectonic Implications显示文摘The Southern Great Xing'an Range,Northeast China,is located in the eastern part of the Central Asian Orogenic Belt.It is considered to be one of the most important metallogenic belts,commonly hosting a series of skarn.porphyry and magmatic hydrothermal Pb-Zn-Ag-Cu Mo-Sn polymetallic deposits(Fig.1).Complex tectonic events have occurred in this region,including the closure of the Palco-Asian Ocean in the Late Palaeozoic,the opening and closure of the Mongol Okhotsk Ocean and the subduction of the Paleo-Pacific Ocean in the Mesozoic. | ZHAO Qing XIAO Rongge LIU Jingdang ZHANG Yanfei LIANG Shuai LI Panpan | 2020 | Acta Geologica Sinica(English Edition)2020，94，2： | 0 |
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