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您的检索式：作者名="D.V.Subbarao"
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| 1 | Grain to outcrop-scale frozen moments of dynamic magma mixing in the syenite magma chamber,Yelagiri Alkaline Complex,South India显示文摘Magma mixing process is unusual in the petrogenesis of felsic rocks associated with alkaline complex worldwide.Here we present a rare example of magma mixing in syenite from the Yelagiri Alkaline Complex,South India.Yelagiri syenite is a reversely zoned massif with shoshonitic(Na2O+K2O=5-10 wt.%,Na2O/K2 O=0.5-2,TiO2<0.7 wt.%) and metaluminous character.Systematic modal variation of plagioclase(An11-16Ab82-88),K-feldspar(Or27-95Ab5-61),diopside(En34-40Fs11-18Wo46-49),biotite,and Ca-amphibole(edenite) build up three syenite facies within it and imply the role of in-situ fractional crystallization(FC).Evidences such as(1) disequilibrium micro-textures in feldspars,(2) microgranular mafic enclaves(MME) and(3) synplutonic dykes signify mixing of shoshonitic mafic magma(MgO=4-5 wt.%,SiO2=54-59 wt.%,K2O/Na2 O=0.4-0.9) with syenite.Molecular-scale mixing of mafic magma resulted disequilibrium growth of feldspars in syenite.Physical entity of mafic magma preserved as MME due to high thermal-rheological contrast with syenite magma show various hybridization through chemical exchange,mechanical dilution enhanced by chaotic advection and phenocryst migration.In synplutonic dykes,disaggregation and mixing of mafic magma was confined within the conduit of injection.Major-oxides mass balance test quantified that approximately 0.6 portions of mafic magma had interacted with most evolved syenite magma and generated most hybridized MME and dyke samples.It is unique that all the rock types(syenite,MME and synplutonic dykes) share similar shoshonitic and metaluminous character; mineral chemistry,REE content,coherent geochemical variation in Harker diagram suggest that mixing of magma between similar composition.Outcrop-scale features of crystal accumulation and flow fabrics also significant along with MME and synplutonic dykes in syenite suggesting that Yelagiri syenite magma chamber had evolved through multiple physical processes like convection,shear flow,crystal accumulation and magma mixing. | M.L.Renjith S.N.Charan D.V.Subbarao E.V.S.S.K.Babu V.B.Rajashekhar | 2014 | Geoscience Frontiers2014，5，6： | 2 |
| 2 | 锗对尖刺拟菱形藻多列型生长和藻毒素产生的影响显示文摘研究了锗酸Ge(OH)_4对尖刺拟菱形藻多列型生长和软骨藻酸(Domoic acid)藻毒素生成的影响。结果表明,在一定浓度范围内锗酸可以抑制尖刺拟菱形藻的生长,其抑制效应随锗酸浓度的增大而增强。锗酸还可以抑制该藻细胞分泌软骨藻酸藻毒素。当Ge/Si为35时,抑制效率可达100%。在此结果基础上,就其作用机制进行了探讨。 | 俞志明 D.V.SubbaRao | 1998 | 科学通报1998，43，21： | 1 |
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