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8篇 您的检索式:作者名="DUAN Shigang"
    题名 作者 年代 出处 被引量
1Geological Characteristics and Zircon U-Pb Dating of Volcanic Rocks from the Beizhan Iron Deposit in Western Tianshan Mountains, Xinjiang, NW China显示文摘The Beizhan large iron deposit located in the east part of the Awulale metallogenic belt in the western Tianshan Mountains is hosted in the Unit 2 of the Dahalajunshan Formation as lens, veinlets and stratoid, and both of the hanging wall and footwall are quartz-monzonite; the dip is to the north with thick and high-grade ore bodies downwards. Ore minerals are mainly magnetite with minor sulfides, such as pyrite, pyrrhotite, chalcopyrite and sphalerite. Skarnization is widespread around the ore bodies, and garnet, diopside, wollastonite, actinolite, epidote, uralite, tourmaline sericite and calcite are ubiquitous as gangues. Radiating outwards from the center of the ore body the deposit can be classified into skarn, calcite, serpentinite and marble zones. LA-ICP-MS zircon U-Pb dating of the rhyolite and dacite from the Dahalajunshan Formation indicates that they were formed at 301.3±0.8 Ma and 303.7±0.9 Ma, respectively, which might have been related to the continental arc magmatism during the late stage of subduction in the western Tianshan Mountains. Iron formation is genetically related with volcanic eruption during this interval. The Dahalajunshan Formation and the quartz-monzonite intrusion jointly control the distribution of ore bodies. Both ore textures and wall rock alteration indicate that the Beizhan iron deposit is probably skarn type.ZHANG Zuoheng HONG Wei JIANG Zongsheng DUAN Shigang XU Lingang LI Fengming GUO Xincheng ZHAO Zhengang 2012Acta Geologica Sinica(English Edition)2012,86,3:29
2Geology,Geochemistry and Zircon U-Pb Geochronology of Porphyries in the Dabate Mo-Cu Deposit,Western Tianshan,China:Petrogenesis and Tectonic Implications显示文摘The Dabate Mo-Cu deposit is a medium-sized porphyry-type deposit in the Sailimu Lake region, western Tianshan, China. We present the geology, geochemistry and zircon U-Pb geochronology of granite porphyries from the Dabate district with the intent to constrain their tectonic setting and petrogenesis. Porphyries in the Dabate district include granite porphyry I(gray white color with large phenocrysts), granite porphyry II(pink color with small phenocrysts) and quartz porphyry. Granite porphyry II is the Cu and Mo ore-bearing granitoid in the Dabate deposit. LA-ICPMS zircon U-Pb analyses indicate that granite porphyry II was emplaced at 284.2±1.8 Ma. Granite porphyry I and II have similar geochemical features and are both highly fractionated granites:(1) They have high SiO_2 content(70.93–80.18 wt% and 72.14–72.64 wt%, respectively), total alkali(7.58–8.95 wt% and 9.35–9.68 wt%, respectively), mafic index(0.95–0.98 and 0.93–0.94, respectively) and felsic index(0.79–0.94 and 0.89–0.91, respectively);(2) They are characterized by pronounced negative Eu anomaly, 'seagullstyle' chondrite-normalized REE patterns and 'tetrad effect' of REE;(3) They are rich in Rb, K, Th, Ta, Zr, Hf, Y and REE, but depleted in Sr, P, Ti and Nb. The magma of granite porphyries in Dabate can be interpreted to have been generated by partial melting of the upper crust due to mantle-derived magma underplating in a post-collisional extensional setting.DUAN Shigang ZHANG Zuoheng WANG Dachuan LI Fengming 2017Acta Geologica Sinica(English Edition)2017,91,2:7
3Clinical Efficacy of Surgical Removal of Deep Corneal Plant Foreign Bodies显示文摘Purpose:To describe a technique for removing deep corneal plant foreign bodies. Methods:Twelve patients (7 males and 5 females, aged 5 to 56 years).with plant foreign bodies embedded in the deep cornea were treated between July 2011 and December 2012. The course of disease ranged from 1 to 11 d. Four of the patients had wooden foreign bodies, 3 had bamboo foreign bodies, and 5 had flower thorns; all underwent surgical removal. During the surgery,a novel suture needle was used to remove the foreign bodies.For injuries with a deep tunnel caused by the foreign bodies,the tunnel was cut open with a keratome. The foreign bodies were then removed and necrotic tissue was thoroughly debrided.Incisions were closed with interrupted sutures. The corneal foreign bodies were collected postoperatively for fungus and bacterial culture and appropriatemedical treatment was provided. Results: Bacteria were identified in 3 cases, fungus in 3 cases, and no bacteria or fungus in 6 cases.All corneal foreign bodies were embedded deep in the corneal stroma without incidence of full-thickness corneal penetration or intraocular infection. Conclusion:Plant foreign bodies embedded in the deep cornea should be removed immediately. During the surgery, the foreign bodies and surrounding necrotic corneal stroma should be completely removed. The injured cornea should be cut open to eliminate necrotic tissues when necessary. (Eye Science 2013; 28:30-33)Hucheng Duan Shigang Yan 2013Eye Science2013,28,1:2
4Eosinophilic gastroenteritis:Clinical manifestations and morphological characteristics,a retrospective study of 42 patients显示文摘Li Zhang Liping Duan Shigang Ding 0,,:1
5Geology, geochemistry, and geochronology of the Dunde iron-zinc ore deposit in western Tianshan, China显示文摘Duan Shigang Zhang Zuoheng Jiang Zongsheng 2014Ore Geology Reviews2014,57,:1
6Geology, geochemistry, and geochronology of the Dunde iron-zinc ore deposit in western Tianshan, China 显示文摘Duan Shigang Zhang Zuoheng Jiang Zongsheng 2014Ore Geology Reviews2014,57,:1
7Eosinophilic gastroenteritis: Clinical manifestations and morphological characteristics, a retrospective study of 42 patients显示文摘Li Zhang Liping Duan Shigang Ding Jingjing Lu Zhu Jin Rongli Cui Michael McNutt Aiying Wang 2011Scandinavian Journal of Gastroenterology2011,,9:1
8Geology, geochemistry, and geochronology of the Dunde iron-zinc ore deposit in western Tianshan, China显示文摘Duan Shigang Zhang Zuoheng Jiang Zongsheng 2014Ore Geology Reviews2014,57,:1
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