Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly
Early Neoproterozoic metagabbro-tonalite-trondhjemite of Sør Rondane (East Antarctica): Implications for supercontinent assembly
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Sår Rondane（南极洲东部）新元古代早期变辉长岩-英闪长岩-长岩：对超大陆组装的影响
DOI：
10.1016/j.precamres.2014.10.014
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发表时间：
2015
影响因子：
3.8
通讯作者：
Damaske
中科院分区：
文献类型：
--
作者：
Elburg;Jacobs;Andersen;Läufer;Ruppel;Krohne;Damaske
来自南罗纳山脉西南角的侵入性变火成岩的新数据证实了这是一个年轻的洋弧岩的观点，与俯冲有关的岩浆活动的主要阶段大约在995-975 Ma之间。较年轻的岩浆活动（960-925 Ma）变化更大：存在高Sr/Y（埃达克质）套件，以及高Ti基性岩墙和A型花岗岩样品。这被解释为反映了俯冲的结束。偶尔存在的继承锆石表明南罗纳河接近一个旧的大陆核，从那里脱落的碎屑。虽然“变质火成岩区”在代表幼年海洋弧上似乎是独特的，但大约1000-900 Ma的火成岩年龄和同位素组成表明，从Schirmacher绿洲（11° E）到Yamato山脉（35° E）的露头之间存在广泛的一致性。这一地区似乎与德龙宁毛德地中部和西部稍老、同位素和地球化学更富集的中元古代岩石无关。在最早的新元古代，与斯里兰卡-印度-马达加斯加的关系似乎比与南部非洲的关系更密切。
New data for intrusive meta-igneous rocks from the Southwest terrane of the Sør Rondane Mountains confirm the view that this is a juvenile oceanic arc terrane, with the main phase of subduction-related magmatic activity around 995–975 Ma. Younger magmatism (960–925 Ma) is more varied: a high Sr/Y (‘adakitic’) suite is present, as well as high-Ti mafic dykes, and one sample of A-type granite. This is interpreted as reflecting the end of subduction. The occasional presence of Archaean inherited zircons suggests proximity of Sør Rondane to an older continental nucleus from which detritus was shed. Although the ‘meta-igneous sector’ appears to be unique in representing a juvenile oceanic arc terrane, igneous ages and isotopic compositions around 1000–900 Ma suggest a broad coherence between outcrops ranging from Schirmacher Oasis (11° E) to Yamato Mts (35° E). This area seems unrelated to the slightly older, and isotopically and geochemically more enriched Mesoproterozoic rocks of central and western Dronning Maud Land. A closer relation appears to exist with Sri Lanka-India-Madagascar during the earliest Neoproterozoic than with southern Africa.
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影响因子：
1.1
作者：
E. Mikhalsky;J. W. Sheraton
通讯作者：
E. Mikhalsky;J. W. Sheraton
影响因子：
3.5
作者：
Belousova, EA;Griffin, WL;Fisher, NI
通讯作者：
Fisher, NI
影响因子：
3.5
作者：
Gazel, Esteban;Hoernle, Kaj;Swisher, Carl, III
通讯作者：
Swisher, Carl, III
DOI：
10.1086/425969
发表时间：
2005-01
期刊：
The Journal of Geology
影响因子：
--
作者：
Masao Asami;Kazuhiro Suzuki;E. Grew
通讯作者：
Masao Asami;Kazuhiro Suzuki;E. Grew
DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
ヤスオ イケダ;カズユキ シライシ;ケイゾウ ヤナイ;Ikeda Yasuo;Shiraishi Kazuyuki;Yanai Keizo
通讯作者：
Yanai Keizo