查询词典 enclaves
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According to the statistics of 2615 enclaves in 53 enclave observation spots, enclaves in Fangshan granodiorite are divided into two categories, xenolith enclave and microgranular enclave.
依据53个观察点2615个包体的统计,将房山花岗闪长岩体中的包体划分为捕虏岩包体和微粒包体两大类。
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Study on the lithology and petrology (fine-grained cold-quenching ring of the enclaves, the reverse vein, the complex enclaves, the plagioclase phenocryst from both host rock and enclaves that is consist on the crystal form, composition and light, et al.), petrogeochemistry (Y/Nb=2.77~6.82, La/Nb=0.91~4.33, Ba/Nb=0.13~37.86, et al.), Sr and Nd isotope most ISr between 0.7031~0.7041,εNd(t=5.2~7.1 and LA-ICP-MS zircon U-Pb dating (the host rock age is 311±12Ma, and enclaves is 306±7Ma), believe the Huangyangshan pluton is crust-mantle hybrid genesis.
通过岩石学和岩相学(包体细粒淬冷边,反向脉,复合包体以及寄主岩石和包体中斜长石斑晶在形态、成分、光性上的一致性等),岩石地球化学(Y/Nb=2.77~6.82,La/Nb=0.91~4.33,Ba/Nb=0.13~37.86等),Sr和Nd同位素(ISr多数在0.7031~0.7041,εNd在5.2~7.1之间)以及LA-ICP-MS锆石U-Pb测年(寄主岩石为311±12Ma,包体为306±7Ma)综合研究认为黄羊山花岗岩是壳-幔源岩浆混合成因的。
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As a whole, the rocks from diorite enclaves, through quartz-diorite, granodiorite to monzonitic granite, have the feature of REE slightly increasing, Eu from weakly positive transits to negative anomaly, but the diorite enclaves which has Eu negative anomaly. Besides, the Ba, Nb, Ta, P and Ti all show negative anomaly, and have positive anomalies of K and Th, simultaneously, there exists Sr positive anomaly in some rocks. Along with the increasing of the SiO〓, the P and Ti have negative anomaly, Th and K positive anomaly are obvious.
张广才岭中生代不同时期的花岗岩具有相同的Sr、Nd同位素特征,均具有高ε〓值、低,值的突出特点,ε〓值集中在-2~+4之间,〓值主要集中在0.703~0.706之间。
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Dioritic magmatic enclaves have been discovered in the subvolcanic ring dikes for the first time by this study. These enclaves have typical back-vein and quenched margin where there are a lot of needle-like apatites.
首次在相山北部次火山岩岩墙中发现的辉石闪长质岩浆包体,具有典型的反向脉及淬冷边,其淬冷边内含有大量的针状磷灰石。
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Therefore , the quenched dioritic enclaves in subvolcanic granodiorite in Xiangshan were formed by the convection of the magma with different composition and temperature and by the heterogeneous mingling between them. These enclaves are genetically quenched enclaves.
因此,相山潜火山岩岩墙中的闪长质岩石包体是不同成分、不同温度的岩浆经对流及不均一岩浆混合作用而形成,在成因类型上属淬冷包体。
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Dioritic enclaves were discovered by the authors in thesubvolcanic rock dike of the northern part of the large collapse volcanic basin in Xiangshan, Jiangxi Province. These enclaves have a typical back vein and a quenched margin,and contain a large number of acicular apatites.
在江西相山大型塌陷式火山盆地北部的潜火山岩岩墙中,笔者发现了闪长质的岩石包体,这种包体具典型的反向脉及淬冷边,且淬冷边内含有大量针状磷灰石。
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On the Harker diagram, there are general correlations between the oxides and SiO〓 of the Xiangshan complex, whereas the dioritic enclaves are not cosistent with the correlation trend of the complex. On the classification diagram of biotites, the biotites of the complex belong to ferribiotite, while the biotites of the diorite enclaves fall into the area of magnesio-biotite.
在哈克图解中,杂岩体全岩各氧化物与SiO〓之间总体上呈良好的线性关系,但闪长质包体却很不协调;在黑云母分类图解中,杂岩体中的黑云母均落在铁质黑云母分类区,而闪长质包体中的黑云母无一例外地落在镁质黑云母分类区。
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Kubusunan granite is chracterized by low87Sr/86Sr initial values and high ε values, indicating its origin partly from mantle rocks. The number of microgranular dioritic enclaves is the direct evidence for crust-mantle magma mixing, thus showing that enclaves are the residual formed from the partly fusing of basic magma.
库布苏南花岗闪长岩体具有低锶初始比值I和正ε值,表明花岗岩的来源有地幔物质参与,而大量发育的暗色微粒闪长质包体是壳幔岩浆混合作用最直接的证据,微粒包体是基性源岩部分熔融作用形成的残余体。
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Petrographic and petrologic characters of granitoids and its mafic microgranular enclaves in middle Gangdis〓 belt show that both of them are of magma origin, coexisting marie and felsic magmas, which may be represented by microgranular enclaves and granitoids respeetely, favour magma mixing model.
冈底斯带中段花岗岩及其中铁镁质微粒包体的岩相学、岩石学特征表明花岗岩及其中的包体都是岩浆成因的,两者所代表的长英质、镁铁质岩浆表现为岩浆混合关系。
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Potassium feldspar and plagioclase xenocrysts are seen within these enclaves and the boundary between the host rock and the enclaves. These xenocrysts are trapped from the host magma by the enclave magma and are frequently resorbed into a round and sieve shape.
在包体内部或包体与寄主岩的边界均见有钾长石及斜长石捕虏晶,这种捕虏晶是包体岩浆从寄主岩岩浆中捕获的,常被熔蚀成筛状或浑圆状。
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