中二叠纪无气冥王星Chinquilchoro:智利北部其南部同心正常分区的一个例子

IF 0.9 4区地球科学 Q3 GEOLOGY

Andean Geology Pub Date : 2021-01-28 DOI:10.5027/ANDGEOV48N2-3354

H. Niemeyer, C. Castillo

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引用次数: 0

摘要

中二叠纪Chinquilchoro岩体的南部由两个大致同心的岩相组成：A岩相、外部黑云母岩相和内部白云母岩相。A岩相由石英闪长岩和石英二长岩组成，B岩相位于石英二长闪长岩与石英二长石之间。两种岩相之间的接触是过渡的和不稳定的。这两种岩相分别为钙碱性、金属铝质和铁质。这两种岩相的共存可以用同一母岩浆在异常构造环境中的分离结晶来解释。

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El plutón anorogénico Chinquilchoro del Pérmico medio: un caso de zonación concéntrica normal en su parte meridional, norte de Chile

The southern part of the Mid- Permian Chinquilchoro pluton consits of two approximately concentric lithofacies: an A lithofacies, external melanocratic and a leucocratic internal B lithofacies. The A lithofacies is formed by quartz diorite and quartz monzonite, and the B lithofacies lies in the limit between quartz monzodiorite and quartz monzonite. The contact between the two lithofacies is transitional and difuse. The two lithofacies are calcalkaline, metaluminous and ferric. The coexistence of both lithofacies can be explained by fractional crystallization from the same parental magma in an anorogernic tectonic environment.

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来源期刊

Andean Geology 地学-地质学

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： This journal publishes original and review articles on geology and related sciences, in Spanish or English, in three issues a year (January, May and September). Articles or notes on major topics of broad interest in Earth Sciences dealing with the geology of South and Central America and Antarctica, and particularly of the Andes, are welcomed. The journal is interested in publishing thematic sets of papers and accepts articles dealing with systematic Paleontology only if their main focus is the chronostratigraphical, paleoecological and/or paleogeographical importance of the taxa described therein.