Jurassic Tholeiites in the Region of The Upper Rennick Glacier, North Victoria Land
Jurassic Tholeiites in the Region of The Upper Rennick Glacier, North Victoria Land
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北维多利亚地伦尼克冰川上部地区的侏罗纪拉斑岩
DOI：
10.1002/9781118664957.ch11
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发表时间：
2013
影响因子：
5
通讯作者：
M. A. Haban
中科院分区：
文献类型：
--
作者：
D. Elliot;M. A. Siders;M. A. Haban
柯克帕特里克玄武岩的熔岩在伦尼克冰川地区形成了一系列突出的台地。地层厚度约为780米，包括多达40个流动，厚度从不到1米到135米不等。层序中夹层分布稀疏，既有含油气的湖相层，也有火山岩。熔岩覆盖地形至少50米。侵入Beacon地层的Ferrar白云岩的相关叠置岩床出现在Gair梅萨南端附近、沿着高原悬崖向西和Aeronaut冰川以东。盖尔梅萨南端的构造是一个宽而浅的向斜;北面的一个主要断层将熔岩与西面的悬崖分开。在区域上，熔岩也形成了一个孤立的露头在较低的伦尼克冰川，而diligentsills发生在广泛的地区。伦尼克地堑晚于侏罗纪岩浆活动。
Lavas of the Kirkpatrick Basalt form a prominent series of mesas in the Rennick Glacier region. The stratigraphic thickness is about 780 m, consisting of up to 40 flows ranging from less than 1 m to as much as 135 m thick. Interbeds in the sequence occur sparsely and include both fossiliferous lacustrine beds and volcanogenic rocks. The lavas cover topography of at least 50 m. Correlative diabase sills of the Ferrar Dolerite, which intrude Beacon strata, occur near the southern end of Gair Mesa, along the plateau escarpment to the west, and to the east of Aeronaut Glacier. The structure at the southern end of Gair Mesa is a broad, shallow syncline; to the north a major fault separates the lavas from the escarpment to the west. Regionally, the lavas also form an isolated outcrop in the lower Rennick Glacier, whereas the diabase sills occur over a wide area. The Rennick graben postdates the Jurassic magmatism.