Synkinematic emplacement of the magmatic epidote bearing Major Isidoro tonalite-granite batholith: Relicts of an Ediacaran continental arc in the Pernambuco-Alagoas domain, Borborema Province, NE Brazil

da Silva Thyego R.; Ferreira Valderez P.; Correia de Lima Mariucha M.; Sial Alcides N.; da Silva Jose Mauricio R.

首页> 外文期刊>Journal of South American earth sciences >Synkinematic emplacement of the magmatic epidote bearing Major Isidoro tonalite-granite batholith: Relicts of an Ediacaran continental arc in the Pernambuco-Alagoas domain, Borborema Province, NE Brazil

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Synkinematic emplacement of the magmatic epidote bearing Major Isidoro tonalite-granite batholith: Relicts of an Ediacaran continental arc in the Pernambuco-Alagoas domain, Borborema Province, NE Brazil

机译：带有主要伊西多罗斜方岩-花岗岩基岩的岩浆显子的运动学定位：巴西东北部博尔博雷马省伯南布哥-阿拉戈斯地区的埃迪亚卡拉大陆弧遗迹

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The Neoproterozoic Major Isidoro batholith (similar to 100 km(2)), composed of metaluminous to slightly per-aluminous magmatic epidote-bearing tonalite to granite, is part of the Aguas Belas-Caninde composite batholith, which intruded the Pernambuco-Alagoas Domain of the Borborema Province, northeastern Brazil. These rocks contain biotite, amphibole, titanite and epidote that often shows an allanite core as key mafic mineral phases. K-diorite mafic enclaves are abundant in this pluton as well as are amphibole-rich clots. The plutonic rocks are medium-to high-K calc-alkaline, with SiO2 varying from 59.1 to 71.6%, Fe# from 0.6 to 0.9 and total alkalis from 6.1 to 8.5%. Chondrite-normalized REE patterns are moderately fractionated, show (La/Lu)(N) ratios from 13.6 to 31.8 and discrete negative Eu anomalies (0.48-0.85). Incompatible-element spidergrams exhibit negative Nb-Ta and Ti anomalies.

机译：新元古代主要伊西多洛岩基（类似于100 km（2）），由含金属的至略为高铝质的含岩释石的方钠石到花岗岩组成，是Aguas Belas-Caninde复合岩基的一部分，侵入了伯南布哥-阿拉戈斯地区巴西东北部的Borborema省。这些岩石包含黑云母，角闪石，钛矿和埃迪奥石，这些岩石通常显示出以褐铁矿为核心的镁铁质矿物相。 K-闪闪岩镁铁质飞地以及富闪石块的凝块中都含有丰富的钾铁镁铁质飞地。古生岩为中等至高K的钙碱性物质，SiO2从59.1到71.6％不等，Fe＃从0.6到0.9不等，总碱值从6.1到8.5％不等。球粒陨石标准化的REE模式适度分级，显示（La / Lu）（N）比从13.6至31.8，且离散负Eu异常（0.48-0.85）。不相容元素蜘蛛图显示负Nb-Ta和Ti异常。

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来源
《Journal of South American earth sciences》 |2015年第1期|1-13|共13页
作者
da Silva Thyego R.; Ferreira Valderez P.; Correia de Lima Mariucha M.; Sial Alcides N.; da Silva Jose Mauricio R.;
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作者单位

Univ Fed Pernambuco, Dept Geol, NEG LABISE, Recife, PE, Brazil;

Univ Fed Pernambuco, Dept Geol, NEG LABISE, Recife, PE, Brazil;

Univ Fed Pernambuco, Dept Geol, NEG LABISE, Recife, PE, Brazil;

Univ Fed Pernambuco, Dept Geol, NEG LABISE, Recife, PE, Brazil;

Univ Fed Pernambuco, Dept Geol, Recife, PE, Brazil;

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正文语种 eng
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关键词
Synkinematic granites; Calc-alkaline granites; U-Pb age; Sm and Nd isotopes; Oxygen isotopes; Pernambuco-Alagoas domain;

机译：动力学岩石;钙碱性花岗岩;U-Pb年龄;Sm和Nd同位素;氧同位素;伯南布哥-阿拉戈斯地区;

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Synkinematic emplacement of the magmatic epidote bearing Major Isidoro tonalite-granite batholith: Relicts of an Ediacaran continental arc in the Pernambuco-Alagoas domain, Borborema Province, NE Brazil

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