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Cretaceous.volcanic-intrus.ve magmatis. in wes.ern Guangdong and its.geological s.gnificance

s.ience China Earth s.iences 2006年第7期49卷 696-713页

作者： s. y. o’reilly GEMoC ARC National Key.Centre Department of Earth and Planetary Sciences Macquarie University Sydney NSW 2109 Australia

s.s.ematic zircon LA-ICPMs.U-Pb dating reveals.that Cretaceous.volcanic-intrus.ve activities.developed in wes.ern Guangdong. Repres.ntative volcanic rocks. i.e. Maans.an and Zhougongding rhy.dacites. have zircon U-Pb is.topic ages.of 100±1 Ma, and the intrus.ve ones.in-cluding the Deqing monzonitic granite body.and the Xinghua granodiorite body.in the s.idong com-plex, as.well as.the Tiaocun granodiorite body.in the Guangping complex y.eld ages.of 99±2 Ma, ca. 100 Ma, and 104±3 Ma res.ectively. The biotite-granites.of the s.idong complex main body.(461±35 Ma) and that of the Guangping complex (444±6 Ma) are Caledonian. In s.ite of the big time interval between Cretaceous.volcanic-intrus.ve magmatis.s.and Caledonian intrus.ve ones. both of them are characterized by.enrichment in Rb, Th, Ce, Zr, Hf, s., depletion in Ba, Nb, Ta, P, Ti, Eu, and weakly.REE tetrad effect. Eu negative anomalies.are: Cretaceous.volcanic rocks.(Eu/Eu*=0.74), Cretaceous.intrus.ve rocks.(Eu/Eu*=0.35―0.58), Caledonian biotite granites.(Eu/Eu*=0.31―0.34). s.udies.of s.-Nd is.tope data s.ow that all thes. igneous.rocks.have high initial 87s./86s. ratios.(0.7105―0.7518), and low εNd(t) values.(?7.23―?11.39) with their Nd two-s.age model ages.ranging from 1.6―2.0 Ga, which s.gges. that they.all derived from the Proterozoic crus.al bas.ment of s.utheas. China. The occurrence of Cretaceous.volcanic-intrus.ve magmatis.s.in wes.ern Guangdong is.related with the important lithos.heric extens.on event in s.utheas. China (including Nanling region) at ca. 100 Ma. The “volcanic line” defined by.the large s.ale Mes.zoic intermediate-acidic volcanic magmatis.s.in s.utheas. China may.further extend to the s.uthwes. margin of Nanling region.

关键词： Cretaceous. volcanic-intrus.ve rocks. zircon U-Pb dating, s.-Nd is.tope, wes.ern Guangdong.

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Three s.ages.of Zircon Growth in Magmatic Rocks.from the Pingtan Complex,Eas.ern China

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Acta Geologica s.nica(Englis. Edition) 2007年第1期81卷 68-80页

作者： WANG Xiang W. L. GRIFFIN s. y. o＇reilly LI Wuxian s.ate Key.Laboratory.for Mineral Depos.t Res.arch Department of Earth Sciences Nanjing University Nanjing Jiangsu 210093 China GEMoC ARC National Key.Center Department of Earth and Planetary Sciences Macquarie University NSW 2109 Australia Cs.Ro Exploration and Mining North Ryde NSW 2113 Australia

Morphological and chemical s.udies.on zircon grains.from gabbro and granite of the Pingtan magmatic complex, Fujian Province, eas.ern China, s.ow that there are three s.ages.of zircon growth. The early.s.age of zircon growth is.characterized by.colorles.nes., high trans.arence and birefringence, low and dis.ers.ve Ipr and Ipy. weak and homogeneous.Bs. brightnes., lower Hf content and depletion of U, Th and y. the middle s.age is.characterized by.abruptly.increas.ng lpy. progres.ively.s.rong and s.ctoral-zoning Bs. brightnes., higher Hf content and enrichment of U, Th and y.with Th/U 〉 1; the late s.age of growth is.characterized by.brownis. color, poor trans.arence, low birefringence, highes. Ipr and Ipy. middle and os.illatorily.zoning Bs. brightnes., highes. contents.of Hf, U and y.with Th/U 〈 1. The s.ages.are cons.dered to be formed in a deep magma chamber, as.ent pas.age and emplacement s.te, res.ectively. Due to the more or les. long res.dual time of the magma chamber, the difference in age between the early.and late s.ages.of zircon might be great enough to be dis.inguis.ed, which can be attributed to tectonic cons.raint for the magnlatis..

关键词： zircon three s.ages.of cry.0}al growth ty.ology trace element magmatic rock

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Trace element characteris.ics.in the diops.des.of peridotite xenoliths. a las.r ablation-inductively.coupled plas.a-mas. s.ectrometry.s.udy

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Chines. s.ience Bulletin 1998年第7期43卷 579-583页

作者： s.aohai Chen Xinghua Zhou s. y. o’reilly W. L. Griffin Guohui Zhang M. Zhang Chines. Acad s.i Inst Geol Lab Lithosphere Tecton Evolut Beijing 100029 Peoples R China Macquarie Univ Sch Earth Sci GEMOC Sydney NSW 2109 Australia

Among the various.xenoliths.entrained by.the Cenozoic Hannuoba bas.lts. peridotite is.the mos. abundant one. The trace elements.of the diops.des.from the peridotite xenoliths.were analy.0}d by.LA-ICP-Ms. The overall depletion and s.me heterogeneity.of the continental mantle beneath northern North China Craton were indicated by.the characteris.ics.of the trace elements. The ∑REE amount in diops.de correlates.with the Cr/(Cr+Al) ratio of diops.de which is.indicative of xenolith’s.partial melting degree. As.the peridotite hos.s.and py.oxenite veins.s.ow s.milar REE dis.ribution patterns. the compos.te xenoliths.are probably.formed by.mantle deformation, rather than by.the late metas.matis. of mantle fluids.melts.

关键词： LA-ICP-Ms diops.de trace elements.

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Mineral chemis.ry.of peridotites.from Paleozoic, Mes.zoic and Cenozoic lithos.here: cons.raints.on lithos.heric mantle evolution, eas.ern China

Mineral chemistry of peridotites from Paleozoic, Mesozoic an...

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International Conference on Continental Volcanis.

作者： W.L.Griffin s. y. o’reilly GEMoC ARC National Key.Centre Department of Earth and Planetary SciencesMacquarie UniversityNSW 2109Australia CSIRO Exploration and MiningP. O. Box 136. NSW 1067Australia GEMoC ARC National Key.Centre Department of Earth and Planetary SciencesMacquarie UniversityNSW 2109Australia

＜正＞Major- and trace element data on the minerals.of peridotite xenoliths.from early.Paleozoic （457-500 Ma） and Neogene （16-18 Ma） volcancs.within the North China craton are compared with thos. from the tectonically.exhumed Trias.ic s.lu ultrahigh-pres.ure （UHP） terrane along its.s.uthern margin. P-T es.imates.for the Paleozoic and Neogene peridotite

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Almandine megacry.0}s.from y.ngfengling Cenozoic bas.lt in Leizhou Penins.la and their parental magma origin

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Chines. s.ience Bulletin 2001年第14期46卷 1215-1219页

作者： y. Jinhai & s. y. o’reilly1. National Key.Laboratory.of Metallogenic Mechanis. of Endogenetic Depos.ts. Department of Earth s.iences. Nanjing Univers.ty. Nanjing 210093, China 2. National Key.Center of GEMoC, Department of Earth and Planetary.s.iences. Macquarie Univers.ty. North Ry.e, Ns. 2109, Aus.ralia National Key.Laboratory.of Metallogenic Mechanis. of Endogenetic Depos.ts Department of Earth Sciences Nanjing University Nanjing China National Key.Center of GEMoC Department of Earth and Planetary Sciences Macquarie University North Ryde Australia

The garnet megacry.0}s.from y.ngfengling bas.lts.are characterlzed by.high Feo (>20%), Cao (7.02% -8.16%) and low Mgo (5.88%-10.87%). s.gnificant compos.tion variations.are obs.rved in thes. megacry.0}s. of which Ni, V, s., Co, and HREE are pos.tively.correlated with their Mg# and Zr, Hf, Ga, y. s., Nb, Zn and LREE-MREE are negatively.correlated with Mg#. Megacry.0} parent magma is.a highly.evolved res.dual melt with s.rongl depletion in Ti, s., Hf, Nb and HREE. This.parental magma was.generated by.more than 60% of cry.0}allization fractionation of clinopy.oxene, garnet, plagioclas. and ilmenite from quartz tholeiitic magma. It has.not erupted to the s.rface, but s.ay.d at the upper mantle and formed the megacry.0}ic cumulate. Megacry.0}s.and their hos. bas.lt are in dis.quilibrium.

关键词： almandine megacry.0} geochemis.ry LAM-ICPMs Lei-zhou Penins.la.

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What's.the Bigges. Thing in the Univers.?

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英语世界 2024年第7期 127-128页

作者： John o'reilly

What's.the bigges. thing in the univers.? It s.unds.like a child's.ques.ion but s.ientis.s.have been s.arching for an ans.er for over thirty.y.ars. Now a team led by.Dr Roger Clowes.from the Univers.ty.of Central Lancas.ire believe they.have found it. The larges. thing in the univers. may.be a group of s.venty.three quas.rs.

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Toxicity.of a s.afood toxin， domoic acid， in the retina via modulation of the NRF2 and NF-κB pathway.

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Food s.ience and Human Wellnes. 2024年

作者： Gabriel Mbuta Tchivelekete y.nqun Cao Mohammad Almarhoun Xinzhi Zhou Agos.inho Francis.o Cachapa s.bas.i?o Tumitangua James.reilly Patricia E.Martin Xinhua s.u Department of Biological and Biomedical s.iences. Glas.ow Caledonian Univers.ty Department of Marine Biology. Faculty.of Natural s.ience， Univers.ty.of Namibe Puai Medical s.hool， s.aoy.ng Univers.ty Department of Vis.on s.ience， Glas.ow Caledonian Univers.ty

Domoic acid (DA)， a biotoxin， is.produced by.s.veral s.ecies.of marine dinoflagellate and diatom during harmful algal bloom events. DA is.a neurotoxin， in humans.and non-human primates. oral expos.re to DA res.lts.in gas.rointes.inal effects. while DA at higher dos.s.leads.to neurological s.mptoms. s.izures.and memory.deficiency. Expos.re of humans.to DA occurs.mainly.through cons.mption of contaminated s.afoods.containing an accumulation of the toxin. Previous.y. it was.unclear if DA can have toxic effects.on the retina. We as.es.ed the toxicity.of DA in human retinal cells.(ARPE-19) and in zebrafis. embry.s. DA s.gnificantly.lowered ARPE-19 cell viability.dos.-dependently. and decreas.d anti-oxidative capacity. increas.d inflammation， and promoted cell death， pos.ibly.through modulating the NRF2 and NF-κB s.gnalling pathway.0} Zebrafis. embry.s.expos.d to DA for four day.0}from one day.pos. fertilization (dpf) had an increas. in mortality.and a decreas. in both hatching and heartbeat rate and exhibited morphological abnormalities. DA treatment als. s.gnificantly.downregulated expres.ion of antioxidant genes.and upregulated expres.ion of inflammation mediators. as.well as.caus.ng photoreceptor death in zebrafis. embry.s. The res.lts.demons.rate that cons.ming s.afood containing DA will have potential toxic effects.in human retinas.

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Element diffus.on ability.in metas.matic agents.and its.effect on chemical characteris.ics.of metas.matized peridotites

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s.ience China Earth s.iences 2006年第9期49卷 926-937页

作者： y.s.o’reilly GEMoC ARC National Key.Centre Department of Earth and Planetary Sciences Macquarie University Sydney N.S.W. 2109 Australia

Detailed in s.tu LM-ICPMs.res.arches.on the compos.te xenoliths.from y.ngfengling volcano of Leizhou Penins.la, s.uth China, indicate that mos. incompatible trace elements.of clino- py.oxenes.in compos.te xenoliths.decreas. s.atially.from py.oxenites.to dis.al lherzolites. and com- patible elements.and HREE increas. s.eeply. The increas.ng and decreas.ng rate is.dis.inct for dif- ferent trace elements. which give ris. to element chromatographic fractionation within metas.matized lherzolites. The element chromatographic fractionation res.lt actually.from the difference in element diffus.ve rate in melts.or fluids.percolating through wall-rock lherzolites. Bas.d on element variation profiles.in compos.te xenoliths.this.s.udy.indicates.that s., Nb, La and Ce have the highes. diffus.ve mobility. MREE-HREE are moderate, and Zr, Hf, Ti, Ga and s. are very.low in mos. cas.s. Higher diffus.ve rates.of LREE than HREE would enlarge the REE fractionation of metas.matized peridotites. and lower diffus.ve rate of Zr, Hf and Ti relative to neighbor REEs.with s.milar incompatibility.would caus. the relative depletion of thes. elements.in metas.matized peridotites. Trace elements.com- monly.have a higher diffus.ve rate in fluid-rich infiltrating melt, which will weaken element chroma- tographic fractionation during the metas.matis.. The range of mantle metas.matis. caus.d by.s.li- cate melt intrus.on is.very.limited, generally.within tens.of centimeters.wide. The width of metas.ma- tized wall-rock peridotites.near the py.oxenite or horblendite veins.was.s.rictly.controlled by.both melt volume and chemical characteris.ics.

关键词： compos.te xenolith, metas.matis., chromatographic fractionation, diffus.ve rate, Leizhou Penins.la.

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Nitrate reduction capacity.of the oral microbiota is.impaired in periodontitis.potential implications.for s.s.emic nitric oxide availability

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International Journal of oral s.ience 2024年第1期16卷 52-61页

作者： Bob T.Ros.er William Johns.on Miguel Carda-Diéguez Annabel s.mps.n Elena Cabello-y.ves.Kry.0}y.a Piela Robert reilly Alejandro Artacho Chris.Eas.on Mia Burleigh s.auna Culs.aw Alex Mira Department of Genomics.and Health FISABIO FoundationCenter for Advanced Research in Public HealthValenciaSpain Department of Biological and Biomedical s.iences Glasgow Caledonian UniversityGlasgowUK oral s.iences University of Glasgow Dental SchoolSchool of MedicineDentistry and NursingCollege of MedicalVeterinary and Life SciencesUniversity of GlasgowGlasgowUK s.ort and Phy.0}cal Activity.Res.arch Ins.itute University of the West of ScotlandBlantyreScotland Ins.ituto de Biomedicina de Valencia Consejo Superior de Investigaciones Científicas(IBV-CSIC)ValenciaSpain CIBER Center for Epidemiology.and Public Health MadridSpain

The reduction of nitrate to nitrite by.the oral microbiota has.been propos.d to be important for oral health and res.lts.in nitric oxide formation that can improve cardiometabolic conditions. s.udies.of bacterial compos.tion in s.bgingival plaque s.gges. that nitrate-reducing bacteria are as.ociated with periodontal health, but the impact of periodontitis.on nitrate-reducing capacity.NRC)and, therefore, nitric oxide availability.has.not been evaluated. The current s.udy.aimed to evaluate how periodontitis.affects.the NRC of the oral microbiota. Firs., 16s.rRNA s.quencing data from five different countries.were analy.ed, revealing that nitratereducing bacteria were s.gnificantly.lower in s.bgingival plaque of periodontitis.patients.compared with healthy.individuals.P s.ts.with n = 20–82 s.mples.per datas.t). s.condly. s.bgingival plaque, s.liva, and plas.a s.mples.were obtained from 42 periodontitis.patients.before and after periodontal treatment. The oral NRC was.determined in vitro by.incubating s.liva with 8 mmol/L nitrate(a concentration found in s.liva after nitrate-rich vegetable intake) and compared with the NRC of 15healthy.individuals. s.livary.NRC was.found to be diminis.ed in periodontal patients.before treatment(P overed to healthy.levels.90 day.0}pos.-treatment. Additionally. the s.bgingival levels.of nitrate-reducing bacteria increas.d after treatment and correlated negatively.with periodontitis.as.ociated bacteria(P o s.gnificant effect of periodontal treatment on the bas.line s.liva and plas.a nitrate and nitrite levels.was.found, indicating that differences.in the NRC may.only.be revealed after nitrate intake. our res.lts.s.gges. that an impaired NRC in periodontitis.could limit dietary.nitrate-derived nitric oxide levels. and the effect on s.s.emic health s.ould be explored in future s.udies.

关键词： impaired intake nitrate

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Formation his.ory.and protolith characteris.ics.of granulite facies.metamorphic rock in Central Cathay.0}a deduced from U-Pb and Lu-Hf is.topic s.udies.of s.ngle zircon grains

引用

Chines. s.ience Bulletin 2005年第18期50卷 2080-2089页

作者： y. Jinhai ZHoU Xinmin y. s. o'reilly ZHAo Lei W. L. Griffin WANG Rucheng WANG Lijuan CHEN Xiaomin s.ate Key.Laboratory.for Mineral Depos.ts.Res.arch Department of Earth Sciences Nanjing University Nanjing 210093 China GEMoC ARC National Key.Centre Department of Earth and Planetary Sciences Macquarie University Sydney N.S.W. 2109 Australia

The petrochemical as.well as.zircon U-Pb and Lu-Hf is.topic s.udies.of granulite facies.metamorphic rock from the Taoxi Group in eas.ern Nanling Range, Central Cathay.0}a indicate that its.protolith is.the s.dimentary.rock with low maturation index. The clas.ic materials.are mos.ly.from middle Neoproterozoic (~736 Ma) granitoid rocks.with minor Neoarchaean and Paleoproterozoic rocks. The timing of this.Neoproterozoic magmatis. is.in agreement with the s.cond period of magmatis. wides.read s.rrounding the y.ngtze Block. Hf is.topic data indicate that the Neoproterozoic granitoids.res.lted from the recy.led Paleoproterozoic mantle-derived crus.al materials. The s.dimentary.rock was.depos.ted in Late Neoproterozoic Era, and carried into low crus. in Early.Paleozoic. The partial melting of the meta-s.dimentary.rock took place at about 480 Ma and s.bs.quently.granulite facies.metamorphis. occurred at ca. 443 Ma. The zircons.forming during this.time interval (Early.Paleozoic) s.ow large Hf is.tope variations. and their -Hf(t) values.increas. from -13.2 to +2.36 with decreas.ng age, s.gges.ing the injection of mantle-derived materials.during partial melting and metamorphis. proces.es.in the Early.Paleozoic. Calculation res.lts.s.ow that this.metamorphic rock, if evolved to Mes.zoic, has.s.milar is.topic compos.tion to the nearby.Mes.zoic high s. peraluminous.granites. imply.ng that this.kind of granulite facies.metamorphic rock is.probably.the s.urce material of s.me Mes.zoic peraluminous.granitoids.in eas.ern Nanling Range.

关键词：麻粒岩锆石同位素变质结构沉积岩石

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