FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3157901054> ?p ?o ?g. }

• W3157901054 endingPage "829" @default.
• W3157901054 startingPage "805" @default.
• W3157901054 abstract "白马山复式岩体位于湘西雪峰山弧形构造隆起带与湘中白马山-龙山-紫云山EW向构造带的交汇处，由水车、龙潭、小沙江和龙藏湾超单元花岗岩组成。锆石LA-ICP-MS U-Pb同位素定年显示，水车、龙潭、小沙江、龙藏湾超单元花岗岩的侵位年龄分别为424.9±2.2Ma、228.2±1.3Ma、225.3±1.1Ma和215.0±1.2Ma。水车超单元形成于加里东期，其余3个超单元花岗岩均形成于印支晚期，首次系统搭建了白马山复式岩体的年代学格架。印支期龙潭和小沙江超单元花岗岩具有低硅、低碱、准铝质-弱过铝质的特点，显示较强的Rb、Th、U、Pb正异常和Nb、Sr、P、Ti负异常，具有较弱的负Eu异常（δEu为0.55~1.07）；富集Sr同位素[（⁸⁷Sr/⁸⁶Sr）_i=0.719027~0.721297]、亏损Nd同位素[ε_Nd（t）=-10.5~-9.4]和锆石Hf同位素[ε_Hf（t）=-7.7~-4.1]，具有古老的Nd同位素（1.76~1.85Ga）和Hf同位素（1.42~1.83Ga）二阶段模式年龄。相反，龙藏湾超单元花岗岩具有高硅、高碱、强过铝质的特点，显示较强的Rb、Th、U、Ta、Pb正异常和Ba、Nb、Sr、Ti负异常，显示强的负Eu异常（δEu=0.28~0.51）和高（⁸⁷Sr/⁸⁶Sr）_i值（0.741441~0.748761），具有负的ε_Nd（t）值（-11.3~-10.7）和ε_Hf（t）值（-11.5~-3.5），Nd同位素（1.87~1.91Ga）和Hf同位素（1.47~1.97Ga）二阶段模式年龄更老。结合元素和同位素地球化学特征，可推断出龙潭和小沙江超单元花岗岩是华南古老地壳基底中基性变质火成岩混有变质沉积岩发生部分熔融形成的I型或者I-S过渡性质的花岗质岩石，而龙藏湾超单元花岗岩则由华南成熟度更高的古老地壳基底富粘土变沉积岩发生部分熔融形成的S型花岗岩。白马山复式岩体中印支期超单元花岗岩很可能是华南板块受印支板块碰撞挤压后地壳发生伸展减薄，由加厚的地壳发生部分熔融形成的。这些印支期花岗岩与其周缘的金、钨矿床在时、空上具有密切联系，可能具有良好的成矿潜力；湘中地区印支期花岗岩的成岩、成矿作用在强度和广度上可能远高于过去的传统认识。;The Baimashan granitic complex, located in the intersection of the NE-trending Xuefengshan arc uplift and the EW-trending Baimashan-Longshan-Ziyunshan structural belt, consists of Shuiche, Longtan, Xiaoshanjiang, and Longcangwan granite units. Zircon LA-ICP-MS U-Pb dating reveals that the Shuiche, Longtan, Xiaoshanjiang and Longcang units were emplaced at 424.9±2.2Ma, 228.2±1.3Ma, 225.3±1.1Ma and 215.0±1.2Ma, respectively. Granites from the Longtan and Xiaoshajiang units are metaluminous to weakly peraluminous with low Si and alkali contents. They are strongly enriched in Rb, Th, U and Pb, but depleted in Nb, Sr, P and Ti. They are characterized by relatively high REE concentrations with weakly Eu negative anomalies (δEu=0.55~1.07). All samples from Longtang and Xiaoshajiang units exhibit high (⁸⁷Sr/⁸⁶Sr)_i values (0.741441~0.748761), and negative ε_Nd(t) (-10.5~-9.4) and ε_Hf(t) (-11.5~-3.5) values with Proterozoic two-stage Nd (1.76~1.85Ga) and Hf (1.42~1.83Ga) model ages. In contrast, granite samples collected from the Longzangwan unit are strongly enriched in Rb, Th, U, Ta and Pb, but depleted in Ba, Nb, Sr, and Ti, with strongly Eu negative anomalies (δEu=0.28~0.51). The samples usually have relatively high (⁸⁷Sr/⁸⁶Sr)_i values (0.741441~0.748761), negative ε_Nd(t) (-11.3~-10.7), and ε_Hf(t) (-11.5~-3.5) values, with older Nd and Hf model ages of 1.87~1.91Ga and 1.47~1.97Ga, respectively. In combination with Sr-Nd-Hf isotopic and bulk-rock geochemical data, it can be concluded that the parental magmas of granites from the Longtan and Xiaoshajiang units were likely to be derived from the partial melting of the ancient intermediate-mafic meta-igneous rock and meta-sedimentary rock of the upper continental crust in South China. Granites of the Longcangwan unit were likely to be formed by reworking of meta-sedimentary materials and display S-type affinity. The Indosinian granites in the Baimashan granitic complex were probably emplaced under the extensional background after continental collision between the South China block and the Indo-China block. The Au-W deposits around the Baimashan complex are temporally and spatially related with the Indosinian granites, and therefore the Indosinian granites are potentially favourable for Au-W mineralization. The Indosinian granitic activities and related Au-W-(Sb) mineralization in central Hunan may be more prevalent and more intensive than conventionally considered during the past several decades." @default.
• W3157901054 created "2021-05-10" @default.
• W3157901054 creator A5005489710 @default.
• W3157901054 creator A5007804507 @default.
• W3157901054 creator A5059531410 @default.
• W3157901054 creator A5062096819 @default.
• W3157901054 creator A5067142424 @default.
• W3157901054 creator A5068568372 @default.
• W3157901054 date "2021-01-01" @default.
• W3157901054 modified "2023-10-18" @default.
• W3157901054 title "Petrogenesis and metallogenic effect of the Baimashan granitic complex in central Hunan, South China" @default.
• W3157901054 cites W1514994218 @default.
• W3157901054 cites W1525258218 @default.
• W3157901054 cites W1965958159 @default.
• W3157901054 cites W1971181428 @default.
• W3157901054 cites W1973219404 @default.
• W3157901054 cites W1977650828 @default.
• W3157901054 cites W1979331736 @default.
• W3157901054 cites W1980432127 @default.
• W3157901054 cites W1981207838 @default.
• W3157901054 cites W1981687636 @default.
• W3157901054 cites W1983131682 @default.
• W3157901054 cites W1983396787 @default.
• W3157901054 cites W1983765861 @default.
• W3157901054 cites W1986336642 @default.
• W3157901054 cites W1988490677 @default.
• W3157901054 cites W1991202690 @default.
• W3157901054 cites W1998080044 @default.
• W3157901054 cites W2000555536 @default.
• W3157901054 cites W2000978092 @default.
• W3157901054 cites W2003954276 @default.
• W3157901054 cites W2005978177 @default.
• W3157901054 cites W2008225747 @default.
• W3157901054 cites W2012942710 @default.
• W3157901054 cites W2013103945 @default.
• W3157901054 cites W2018641192 @default.
• W3157901054 cites W2019034794 @default.
• W3157901054 cites W2023756316 @default.
• W3157901054 cites W2028643391 @default.
• W3157901054 cites W2031791794 @default.
• W3157901054 cites W2033885626 @default.
• W3157901054 cites W2037913789 @default.
• W3157901054 cites W2043063526 @default.
• W3157901054 cites W2044911516 @default.
• W3157901054 cites W2045263404 @default.
• W3157901054 cites W2056061487 @default.
• W3157901054 cites W2060461428 @default.
• W3157901054 cites W2060873154 @default.
• W3157901054 cites W2068639334 @default.
• W3157901054 cites W2069627246 @default.
• W3157901054 cites W2079137148 @default.
• W3157901054 cites W2081513947 @default.
• W3157901054 cites W2081673195 @default.
• W3157901054 cites W2083558141 @default.
• W3157901054 cites W2083960538 @default.
• W3157901054 cites W2086557360 @default.
• W3157901054 cites W2087669497 @default.
• W3157901054 cites W2090206242 @default.
• W3157901054 cites W2091097158 @default.
• W3157901054 cites W2099243038 @default.
• W3157901054 cites W2103592777 @default.
• W3157901054 cites W2108971421 @default.
• W3157901054 cites W2127994322 @default.
• W3157901054 cites W2138522501 @default.
• W3157901054 cites W2140093647 @default.
• W3157901054 cites W2167075482 @default.
• W3157901054 cites W2171801505 @default.
• W3157901054 cites W2325529474 @default.
• W3157901054 cites W2403988321 @default.
• W3157901054 cites W2779751148 @default.
• W3157901054 cites W2782721046 @default.
• W3157901054 cites W2797615508 @default.
• W3157901054 cites W2866621679 @default.
• W3157901054 cites W2886660332 @default.
• W3157901054 cites W2887894317 @default.
• W3157901054 cites W2911869590 @default.
• W3157901054 cites W2966635181 @default.
• W3157901054 cites W2984922993 @default.
• W3157901054 cites W3124156516 @default.
• W3157901054 cites W3159149161 @default.
• W3157901054 cites W3159847691 @default.
• W3157901054 cites W4245638129 @default.
• W3157901054 doi "https://doi.org/10.18654/1000-0569/2021.03.11" @default.
• W3157901054 hasPublicationYear "2021" @default.
• W3157901054 type Work @default.
• W3157901054 sameAs 3157901054 @default.
• W3157901054 citedByCount "8" @default.
• W3157901054 countsByYear W31579010542021 @default.
• W3157901054 countsByYear W31579010542022 @default.
• W3157901054 countsByYear W31579010542023 @default.
• W3157901054 crossrefType "journal-article" @default.
• W3157901054 hasAuthorship W3157901054A5005489710 @default.
• W3157901054 hasAuthorship W3157901054A5007804507 @default.
• W3157901054 hasAuthorship W3157901054A5059531410 @default.
• W3157901054 hasAuthorship W3157901054A5062096819 @default.
• W3157901054 hasAuthorship W3157901054A5067142424 @default.
• W3157901054 hasAuthorship W3157901054A5068568372 @default.
• W3157901054 hasConcept C113196181 @default.

• next