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| 1 | Petrological and Geochemical Constraints on the Protoliths of Serpentine-Magnetite Ores in the Zhaoanzhuang Iron Deposit,Southern North China Craton显示文摘The uncommon Mg-rich and Ti-poor Zhaoanzhuang serpentine-magnetite ores within Taihua Group of the North China Craton(NCC) remain unclear whether the protolith was sourced from ultramafic rocks or chemical sedimentary sequences. Here we present integrated petrographic and geochemical studies to characterize the protoliths and to gain insights on the ore-forming processes. Iron ores mainly contain low-Ti magnetite(TiO_2 ~0.1 wt%) and serpentine(Mg#=92.42–96.55), as well as residual olivine(Fo=89–90), orthopyroxene(En=89–90) and hornblende. Magnetite in the iron ores shows lower Al, Sc, Ti, Cr, Zn relative to that from ultramafic Fe-Ti-V iron ores, but similar to that from metamorphic chemical sedimentary iron deposit. In addition, interstitial minerals of dolomite, calcite, apatite and anhydrite are intergrown with magnetite and serpentine, revealing they were metamorphic, but not magmatic or late hydrothermal minerals. Wall rocks principally contain magnesian silicates of olivine(Fo=83–87), orthopyroxene(En=82–86), humite(Mg#=82–84) and hornblende [XMg=0.87–0.96]. Dolomite, apatite and anhydrite together with minor magnetite, thorianite(Th-rich oxide) and monazite(LREE-rich phosphate) are often seen as relicts or inclusions within magnesian silicates in the wall rocks, revealing that they were primary or earlier metamorphic minerals than magnesian silicates. And olivine exists as subhedral interstitial texture between hornblende, which shows later formation of olivine than hornblende and does not conform with sequence of magmatic crystallization. All these mineralogical features thus bias towards their metamorphic, rather than magmatic origin. The dominant chemical components of the iron ores are SiO_2(4.77–25.23 wt%), Fe_2O_3 T(32.9–80.39 wt%) and MgO(5.72–27.17 wt%) and uniformly, those of the wall rocks are also SiO_2(16.34–48.72 wt%), Mg O(16.71–33.97 wt%) and Fe_2O_3 T(6.98–30.92 wt%). The striking high Fe-Mg-Si contents reveal that protolith of the Zhaoanzhuang iron deposit was more likely to be chemical sedimentary rocks. The distinct high-Mg feature and presence of abundant anhydrite possibly indicate it primarily precipitated in a confined seawater basin under an evaporitic environment. Besides, higher contents of Al, Ti, P, Th, U, Pb, REE relative to other Precambrian iron-rich chemical precipitates(BIF) suggest some clastic terrestrial materials were probably input. As a result, we think the Zhaoanzhuang iron deposit had experienced the initial Fe-Mg-Si marine precipitation, followed by further Mg enrichment through marine evaporated process, subsequent high-grade metamorphism and late-stage hydrothermal fluid modification. | MENG Jie LI Houmin LI Lixing SANTOSH M SONG Zhe YANG Xiuqing | 2018 | Acta Geologica Sinica(English Edition)2018，92，2： | 2 |
| 2 | Consequences of Assumption Violations Revisited: A Quantitative Review of Alternatives to the One-Way Analysis of Variance F Test显示文摘 | LIX L M KESELMAN J C Keselman H J | 1996 | eview of Educational Research1996，66，4： | 1 |
| 3 | Gelation of a new Hydrogel system of atactic Poly(vinyl alcohol)/NaCl/H2O显示文摘 | Lixing D Kohshuke U Shadf M | 2002 | Poly Int2002，51，： | 1 |
| 4 | On reduced rank nonnegative matrix factorization for symmetric nonnegative matrices显示文摘 | Catral M Lixing H Michael N | 2004 | Linear Algebra and its Applications2004，393，： | 1 |
| 5 | Heterodimerization and functional interaction between EGF receptor family members:a new signaling parading with implication for breast cancer research显示文摘 | Eara HS Dawson TL Lix M | 1995 | Breast Cancer Ras Treat1995，35，1： | 1 |
| 6 | Properties of Hydrogels of atactic Poly(vinyl alcohol)/NaCl/H2O system and their Application to Drug Release显示文摘 | Sharif M Kohshuke U Lixing D | 2002 | Poly hit2002，51，： | 1 |
| 7 | In vivo T1p and 12 mapping of articular cartilage in osteoarthritis of the knee using 3T MRI显示文摘 | Lix Ma C B Link T M | 2007 | Osteoarthr cartil2007，15，7： | 1 |
| 8 | Serum S100β levels in patients with neural tube defects显示文摘 | NETTO C B PORTELA L V F(E)LIX T M | 2006 | Clin Chim Acta2006，364，12： | 1 |
| 9 | Effect of dietary phospholipid on essential fatty acid requirements and tissue lipid composition of Litopenaeus vannamei juveniles显示文摘 | Gonz lez-F lix M L Gatlin III D M Lawrence A L | 2002 | Aquaculture2002，207，： | 1 |
| 10 | Effectiveness of acupuncture as adjunctive therapy in osteoarthritis of the knee: a randomized controlled trial显示文摘 | Brian M Lixing Lao Patricia Langenberg | 2004 | Ann Intern Med2004，141，12： | 1 |
| 11 | Osteoporosis-related frac- ture case definitions for population-based administrative data 显示文摘 | Lix LM Azinmee M Osman BA | 2012 | BMC Public Health2012，，12： | 1 |
| 12 | Synthesis and characterization of titania-coated Mn-Zn ferrite nanoparticles显示文摘 | Ma M Zhang Y LiX B | 2003 | Colloids Surf Physicochem Eng Aspects2003，224，13： | 1 |
| 13 | Population-based trends in osteoporosis management after new initiations of long-term systemic glucocorticoids(1998-2008)显示文摘 | Majumdar SR Lix LM Yogendran M | 2012 | J Clin Endocrionol Metab2012，97，4： | 1 |
| 14 | Use of proton pump in-hibitors anriskofosteoporosis-related fractures显示文摘 | Argownik L E Lix L M Metge C J | | 0，，： | 1 |
| 15 | Delay in diphtheria ,pertussis ,tetanus vaccination is assoeiated with a redueed risk of ehildhood asthma 显示文摘 | MCDONALD K L HUQ S I LIX L M | 2008 | J Allergy Clin Immunol2008，121，3： | 1 |
| 16 | Genetics of homocysteine metabolism and associated disorders显示文摘 | BRUSTOLIN S GIUGLIANI R FLIX T M | 2010 | Braz J Med Biol Res2010，43，1： | 1 |
| 17 | Security threats scenarios in trust and reputation models for distributed systems显示文摘 | Félix Gómez Mármol Gregorio Martínez Pérez | 2009 | Computers & Security2009，，7： | 1 |
| 18 | The solution structure of type Ⅱ antifreeze protein reveals a new member of the lectin family显示文摘 | Gronwald W Loewen M C Lix B | 1998 | Biochemistry1998，37，14： | 1 |
| 19 | Areliablede- modulator and a power regulation circuit with an accurate and small-size voltage reference in UHF RFID 显示文摘 | DU YQ ZHUANGY Q LIX M etal | 2013 | Mi- croelectronics Journal2013，44，2： | 1 |
| 20 | Intra-- and inter-ethinic differences in the allele frequencies of eytochrume P450 2B6 gene in Chineser显示文摘 | CGuan S Huang M LiX | 2006 | Pharm Res2006，23，： | 1 |
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