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Single zircon lAM-ICPMS U-Pb dating of Guidong complex(SE China)and its petrogenetic significance

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Chinese Science Bulletin 2003年第17期48卷 1892-1899页

作者： XUXishenq DENGPing S.Y.O'Reilly w.l.griffin ZHOUXinmin TANZhengzhong StateKeylaboratoryforMineralDepositsResearch DepartmentofEarthSciencesNanjingUniversityNanjing210093China ResearchInstituteNo.290 SouthChinaBureauofGeologyCNNEShaoguan512026China ARCNationalKeyCentreforthe-GeochemicalEvolutionandMetal-logenyofContinents MacquarieUniversityNSW2109Australia

Single zircon lAM-ICPMS U-Pb dating indi-cates that the Guidong granitic complex is a multistage ba-tholith formed during Indosinian-Yanshanian time. The luxi body (239 ± 5 Ma) and the Xiazhuang body (235.8 ± 7.6 Ma) intruded during Indosinian time, whereas the Aizi body (160.1 ± 6.1 Ma) and the Siqian body (151 ± 11 Ma) formed during Yanshanian time. Inherited zircons (1275—2137 Ma) in the Xiazhuang body imply that at least part of the source rocks of the Guidong complex are from the Proterozoic basement of southeast China. Detailed single zirconlAM-ICPMS U-Pb dating results provide important evi-dence for understanding the evolution, tectonic setting andmineralisation of the complex.

关键词：中国东南部成岩作用锆石 U-Pb测年电感耦合等离子体质谱法花岗岩

Determination of Calcium in Olivine by Proton Microprobe and Its Implication

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Chinese Science Bulletin 1993年第5期38卷 396-399页

作者：陈道公 S.Y.O'Reilly w.l.griffin University of Science and Technology of China Hefei 230026 PRC School of Earth Science Macquarie University NSW 2109 Australia. Division of Exploration Geosciences CSIRO North Ryde NSW 2113 Australia.

Ca is a minor component of olivine (oliv). Its concentration measured by electron microprobe (EMP) is about 0.1—0.5%, which is close to the minimum detection limit. As Ca distribution between oliv and clinopyroxene (cpx)has the possibility of being used as geothermobarometers, it is very important to measure accurately the Ca content in oliv. Proton-induced X-ray emission (PIXE) technique as a new high energy analysis method shows advantage in high sensitivity and accuracy of microanalyses and begins to be

关键词： calcium olivine proton microprobe mantle.

Trace Element Composition of Clinopyroxene From Mantlederived Peridotite Xenoliths

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Chinese Science Bulletin 1993年第14期38卷 1186-1189页

作者：陈道公 S.Y.O'Reilly w.l.griffin University of Science and Technology of China Hefei 230026 PRC School of Earth Sciences Macquarie Univeristy NSW 2109 Australia Division of Exploration Geoscience CSIRO North Ryde 2113 Australia

Knowledge of the trace element distributions and concentrations in main mineral phases of mantle-derived rocks is particularly useful for understanding the partial melting, depletion and enrichment processes, and metasomatism in the earth’s mantle. Trace element data on mantle peridotites were usually obtained with large uncertainty by neutron activation analysis in China previously. we have determined trace element concentration of 173 grains of clinopyroxene (cpx) in 50 peridotite xenoliths from different areas in China using the pro-

关键词： trace element clinopyroxene mantle.

U-Pb dating of zircons from quartz diorite and its enclaves at Tongguanshan in Anhui and its petrogenetic implication

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Chinese Science Bulletin 2004年第19期49卷 2073-2082页

作者： XUXisheng FANQincheng S.Y.O'Reilly JIANGShaoyong w.l.griffin wANGRucheng QIUJiansheng StateKeylaboratoryforMineralDepositsResearch.DepartmentofEarthSciences NanjingUniversity.Nanjing210093.China ARCNationalKeyCentrefortheGeochemicalEvolutionandMetallogenyofContinents MacquarieUniversity.NSW2109Australia

The genesis of intermediate-silicic intrusive rocks and their enclaves in Tongling are closely related to Fe, Cu mineralization, which may provide petrologic informa- tion on lithospheric dynamics in this region. Tongguanshan quartz diorite and its enclaves, representatives of the Meso- zoic intermediate-silicic intrusive rocks in the Tongling area, were studied using approaches of petrography, electron microprobe mineral chemistry and the lA-ICPMS zircon U-Pb dating. The chemical compositions of pyroxene and amphibole in pyroxene-amphibole cumulate, quartz-diorite host rock from Tongguanshan show correlative variations. The Al contents of the minerals in pyroxene-amphibole cu- mulate are higher than those in the host rocks, indicating that the cumulate crystals were crystallized before the em- placement of host magma. The consistent mineral chemical compositions between the Tongguanshan quartz diorite and the microgranular diorite enclave indicate that the enclave and host rock were crystallized under similar conditions and therefore are closely genetically related. The lA-ICPMS zircon U-Pb dating suggests that the crystallization age of Tongguanshan quartz diorite is 137.5±1.1 Ma, consistent with the previous dates by different methods. However, the present U-Pb dating also revealed the presence of late- Archean relict cores, demonstrating that older lower crustal materials were involved in the generation of Mesozoic mag- matic rocks in this area. Furthermore, the dating results show that the crystallization age of the microgranular diorite enclave is 137.5 ±2.4 Ma, the same as the crystallization age of the host magma. By integrating the previous Sr-Nd-Pb isotope data, it is also discussed the petrogenesis of quartz diorite and its enclaves in Tongguanshan.

关键词： U-Pb年代测定法锆石石英闪长岩安徽岩石成因微晶粒状

Contrasting Peridotite Types in the Dabie UHP Belt, Eastern China:the Raobazhai and Bixiling Ultramafic-mafic Complex

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Contrasting Peridotite Types in the Dabie UHP Belt, Eastern ...

中国矿物岩石地球化学学会第11届学术年会

作者： w．l．griffin GEMOC ARC National Key Centre Department of Earth and Planetary SciencesMacquarie UniversityNSW 2109Australia

＜正＞The Dabie UHP metamorphic belt, central China, contains two contrasting types of mafic-ultramafic complex. The Bixiling peridotite in the southern Dabie terrane contains abundant garnet （21. 1 -32. 2 vol% ） and thus has high CaO + Al2O3 （9. 81 - 15. 9 wt% ） . The peridotite has high HREE, S and other incompatible trace elements, and low-Mg olivine and pyroxene, low Ni and PGE. Metamorphic zircons from

关键词： peridotite PGE geochemistry age dating Zircon Hf isotope North China mantle wedge Yangtze Neoproterozoic underplating Dabie UHP terrane

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幔源橄榄岩包体中单斜辉石的微量元素组成

科学通报 1992年第24期37卷 2255-2258页

作者：陈道公 S.Y.O'Reilly w.l.griffin 中国科学技术大学合肥230026 澳大利亚Macquarie大学地学院澳大利亚联邦科学工业研究组织勘探地球科学分部

了解地幔岩石中主要矿物相的微量元素分布、丰度状况对理解部分熔融、地幔的富集和亏损以及地幔交代作用等有重要意义。以往地幔样品的微量元素多由仪器中子活化分析所得,质量不高。我们采用高精度微区微粒的质子微探针(PIXE)技术对中... 详细信息

了解地幔岩石中主要矿物相的微量元素分布、丰度状况对理解部分熔融、地幔的富集和亏损以及地幔交代作用等有重要意义。以往地幔样品的微量元素多由仪器中子活化分析所得,质量不高。我们采用高精度微区微粒的质子微探针(PIXE)技术对中国不同地区50个橄榄岩包体中173个单斜辉石颗粒进行了微量元素定量测定,共获得10种微量元素和5种主要元素含量,本文对其总体情况作一扼要介绍,实测数据及模式处理等将另行报道。

关键词：微量元素单斜辉石地幔橄榄岩

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质子微探针测定橄榄石中钙及其意义

科学通报 1992年第16期37卷 1492-1494页

作者：陈道公 S.Y.O'Reilly w.l.griffin 中国科学技术大学合肥230026 澳大利亚Macquarie大学地学院澳大利亚联邦科学工业研究组织勘探地球科学分部

钙是橄榄石的次要组分,电子探针分析值一般在0.1—0.5％,已处于检出限附近,有较大误差。由于钙在橄榄石和单斜辉石中的分配有作为地质温压计的潜在可能性,因此橄榄石中钙的准确含鼍测定显得尤为必要。质子诱发X射线发射(PIXE,简称质子探... 详细信息

钙是橄榄石的次要组分,电子探针分析值一般在0.1—0.5％,已处于检出限附近,有较大误差。由于钙在橄榄石和单斜辉石中的分配有作为地质温压计的潜在可能性,因此橄榄石中钙的准确含鼍测定显得尤为必要。质子诱发X射线发射(PIXE,简称质子探针)分析作为一种新的高能分析方法,由于其可实现高灵敏度、高精度及微区微粒分析,已开始逐渐在地学领域中应用。本文报道中国六合。

关键词：橄榄石钙质子微探针

湖南丫江桥花岗岩中锆石的Hf同位素地球化学

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科学通报 2003年第4期48卷 379-382页

作者：汪相 w.l.griffin 王志成周新民汪传胜南京大学地球科学系及内生金属矿床成矿机制研究国家重点实验室南京210093 GEMOC Key center Department of Earth and Planetary SciencesMacquarie University SydneyNSW 2109

在丫江桥过铝花岗岩中,锆石可以分作两期,分别形成于岩浆定位前的深部岩浆房内和岩浆定位后的侵入部位,这两期锆石的原位Hf同位素分析揭示,该花岗岩浆主要来自地壳物质的深部熔融.然而,部分较高的176Hf/177Hf数据表明,这些花岗质锆石中... 详细信息

在丫江桥过铝花岗岩中,锆石可以分作两期,分别形成于岩浆定位前的深部岩浆房内和岩浆定位后的侵入部位,这两期锆石的原位Hf同位素分析揭示,该花岗岩浆主要来自地壳物质的深部熔融.然而,部分较高的176Hf/177Hf数据表明,这些花岗质锆石中可能包裹了形成于幔源岩浆的细小锆石(其粒径小于激光束斑),事实上,背散射电子图像和电子探针分析显示,在部分第1期锆石内部存在着另一种形态和成分不同的锆石晶体,它们可能是在花岗质岩浆形成初期混入的幔源岩浆中的结晶产物.因此,推测丫江桥过铝花岗岩的产生与地幔岩浆的底侵怍用有联系.

关键词：湖南丫江桥锆石 Hf同位素地球化学过铝花岗岩底侵作用岩浆定位岩石化学

Mineral chemistry of peridotites from Paleozoic, Mesozoic and Cenozoic lithosphere: constraints on lithospheric mantle evolution, eastern China

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