Silicic volcanism in the Scottish Lower Carboniferous; lavas, intrusions and ignimbrites of the Garleton Hills Volcanic Formation, SE Scotland

Upton Brian G. J.; Kirstein Linda A.; Odling Nicholas; Underhill John R.; Ellam Robert M.; Cayzer Nicola; Clarke Ben A.

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Silicic volcanism in the Scottish Lower Carboniferous; lavas, intrusions and ignimbrites of the Garleton Hills Volcanic Formation, SE Scotland

机译：苏格兰石炭系中的硅气球; Se Scotland的Garleton Hills Volcanic Flowation的熔岩，入侵和赤褐色蜂蜜

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Extensional tectonics and incipient rifting on the north side of the Iapetus suture were associated with eruption of (mainly) mildly alkaline olivine basalts. Initially in the Tournaisian (Southern Uplands Terrane), magmatic activity migrated northwards producing the Garleton Hills Volcanic Formation (GHVF) across an anomalous sector of the Southern Uplands. The latter was followed by resumption of volcanism in the Midland Valley Terrane, yielding the Arthur's Seat Volcanic Formation. Later larger-scale activity generated the Clyde Plateau Volcanic Formation (CPVF) and the Kintyre lavas on the Grampian Highlands Terrane. Comparable volcanic successions occur in Limerick, Ireland. This short-lived (c. 30 myr) phase was unique in the magmatic history of the Phanerozoic of the British Isles in which mildly alkaline basaltic magmatism locally led to trachytic differentiates. The Bangly Member of the GHVF represents the largest area occupied by such silicic rocks. The most widespread lavas and intrusions are silica-saturated/oversaturated trachytes for which new whole-rock and isotopic data are presented. Previously unrecognized ignimbrites are described. Sparse data from the fiamme suggest that the magma responsible for the repetitive ignimbrite eruptions was a highly fluid rhyolite. The Bangly Member probably represents the remains of a central-type volcano, the details of which are enigmatic.

机译：IAPETUS缝合线北侧的延伸构造和初期散步与（主要）轻度碱性橄榄石沼泽的喷发有关。最初在塔尔纳西亚（南方高地地区），岩浆活动迁移北方在南方南方的一个异常部门生产的加利森山火山形成（GHVF）。后者随后恢复米德兰河谷特拉内的火山，产生亚瑟的座位火山形成。后来的大规模活动产生了Clyde高原火山的形成（CPVF）和格拉姆高地地区的春城熔岩。可比较的火山继承发生在爱尔兰利默里克。这种短暂的（C.30 MYR）阶段在英国群岛的Phanerozoio的岩石历史中是独一无二的，其中含有轻微的碱性玄武岩岩浆岩石局部地导致棘突的区分。 GHVF的屁股代表了这种硅岩占据的最大区域。最普遍的熔岩和侵入性是二氧化硅饱和/过饱和的颅内细胞，其呈现新的全岩和同位素数据。描述了以前未被识别的Ignimbrites。来自FIAME的稀疏数据表明，负责重复Ignimbrite爆发的岩浆是一种高度流体的流纹岩。 BANGLY会员可能代表中央型火山的遗骸，其细节是神秘的。

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《Scottish Journal of Geology》 |2020年第1期|共17页
作者
Upton Brian G. J.; Kirstein Linda A.; Odling Nicholas; Underhill John R.; Ellam Robert M.; Cayzer Nicola; Clarke Ben A.;
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Univ Edinburgh Sch GeoSci West Mains Rd Edinburgh EH9 3FE Midlothian Scotland;

Univ Edinburgh Sch GeoSci West Mains Rd Edinburgh EH9 3FE Midlothian Scotland;

Univ Edinburgh Sch GeoSci West Mains Rd Edinburgh EH9 3FE Midlothian Scotland;

Heriot Watt Univ Ctr Explorat Geosci Appl Geosci Unit Inst Petr Engn Sch Energy Geosci Infrastruct &

So Edinburgh EH14 4AS Midlothian Scotland;

SUERC Isotope Geosci Unit Glasgow G75 0QF Lanark Scotland;

Univ Edinburgh Sch GeoSci West Mains Rd Edinburgh EH9 3FE Midlothian Scotland;

Univ Edinburgh Sch GeoSci West Mains Rd Edinburgh EH9 3FE Midlothian Scotland;

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机译：苏格兰石炭系中的硅气球; Se Scotland的Garleton Hills Volcanic Flowation的熔岩，入侵和赤褐色蜂蜜
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7. Silicic volcanism in the Scottish Lower Carboniferous; lavas, intrusions and ignimbrites of the Garleton Hills Volcanic Formation, SE Scotland [O] . Brian G. J. Upton, Linda A. Kirstein, Nicholas Odling, 2020

机译：苏格兰降低石炭系中的硅气球; Se Scotland的Garleton Hills Volcanic Flowation的熔岩，入侵和Ignimbrites

Silicic volcanism in the Scottish Lower Carboniferous; lavas, intrusions and ignimbrites of the Garleton Hills Volcanic Formation, SE Scotland

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