欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
报道了固阳晚太古代绿岩带中科马提岩的Re-Os同位素组成,并对其中最大的一个科马提岩块体进行了详细的野外填图.9个经历角闪岩相变质的科马提岩样品的Re,Os含量分别为0.003～0.070和0.88～2.63ng/g,Os含量与典型的科马提岩相当,略低于正常的地幔橄榄岩;同位素比值^187Re/^188Os为0.014～0.288,^187Os/^188Os为0.1115～0.1197,低的Os同位素比值排除了显生宙岩浆成因.获得的Re亏损模式年龄（TRD）为1346～2454Ma,最大值为2454Ma,代表了科马提岩形成年龄的最小年龄.最大的一个科马提岩透镜体长逾500m,宽逾50m,推测科马提岩体分布面积大约0.05km^2,可能是华北克拉通已知太古宙绿岩带中最大的科马提岩块体.结合已有的地质和同位素年代学资料可以认定,该科马提岩是固阳晚太古代绿岩带的组成部分.这些科马提岩应该是上地幔高度部分熔融的产物,其成因机制对于固阳绿岩带发育的构造背景具有标志意义.
同期刊论文项目
同项目期刊论文
Zircon U-Pb geochronological and Hf isotopic constraints on petrogenesis of the Gangdese batholith i
Tectonic evolution of the South Tianshan Orogen, NW China: geochemical and age constraints of granit
Detrital Zircon Ages and Hf-Nd Isotopic Composition of Neoproterozoic Sedimentary Rocks in the Yangt
Melt/rock interaction in remains of refertilized Archean lithospheric mantle in Jiaodong Peninsula ,
The origin of Mengyin and Fuxian diamondiferous kimberlites from the North China Craton: Implication
Detrital zircon U-Pb and Hf isotopic data from the Xigaze fore-arc basin: constraints on Transhimala
Paleoproterozoic gabbronoritic and granitic magmatism in the northern margin of the North China crat
Compositionally stratified lithosphere and carbonatite metasomatism recorded in mantle xenoliths fro
Multistage metamorphism of orogenic garnet–lherzolite from Zhimafang, Sulu UHP terrane, E. China : I
A normalization solution to mass transfer illustration of multiple progressively altered samples usi
Single-grain detrital muscovite Rb-Sr isotopic composition as an indicator of provenance for the Car
The Qiyugou gold-bearing breccia pipes, Xiong'ershan region, central China : fluid-inclusion and sta
Chen, Y., Ye, K., Liu, J.B., Sun, M.Quantitative P–T–X constraints on orthopyroxene-bearing high-pre
Single grain Rb-Sr isotopic analysis of GA-1550 biotite, LP-6 biotite and Bern-4 muscovite 40Ar-39Ar
Single grain Rb-Sr dating and mineral inclusions of pyrite from the Linglong gold deposit, eastern S
High-Mg adakitic rocks in the Dabie orogen, central China : implications for foundering mechanism of
Contribution of subducted Pacific slab to Late Cretaceous mafic magmatism in Qingdao region, China :
Ultrahigh-pressure garnet peridotites from the devolatilization of sea-floor hydrated ultramafic roc
Zircon U–Pb and Hf isotopic constraints on the Early Archean crustal evolution in Anshan of the Nort
Geochemistry and SHRIMP zircon U-Pb age of post-collisional granites in the southwest Tianshan Oroge
Geochemical and Isotopic Study of the Xiong';er Volcanic Rocks at the Southern Margin of the North C
Re-Os isotopic constraint to the age of in komatiites in the Neoarchean Guyang greenstone belt, Nort
Structural pattern of the Wutai Complex and its constraints on the tectonic framework of the Trans-N
Integrated in situ zircon U-Pb age and Hf-O isotopes for the Helanshan khondalites in North China Cr
Paleoproterozoic evolution of the eastern Alxa Block, westernmost North China: Evidence from in situ
SHRIMP and LA-ICP-MS zircon geochronology of the Xiong';er volcanic rocks: Implications for the Pale
Crustal growth at similar to 2.5 Ga in the North China Craton: evidence from whole-rock Nd and zirco
The Xiong';er volcanic belt at the southern margin of the North China Craton: Petrographic and geoch
Application of Zr-in-rutile thermometry: a case study from ultrahigh-temperature granulites of the K
Halaqin volcano-sedimentary succession in the central-northern margin of the North China Craton: Pro
Metamorphic P-T paths of the Zanhuang amphibolites and metapelites: constraints on the tectonic evol
Application of the two-feldspar geothermometer to ultrahigh-temperature (UHT) rocks in the Khondalit
Timing of metamorphism in the Paleoproterozoic Jiao-Liao-Ji Belt: New SHRIMP U-Pb zircon dating of g
Assembly, accretion, and break-up of the Palaeo-Mesoproterozoic Columbia supercontinent: record in t
Geochronology of khondalite-series rocks of the Jining Complex: confirmation of depositional age and
位置：