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DOI | 10.1130/B35340.1 |
Butcher Ridge igneous complex: A glassy layered silicic magma distribution center in the Ferrar large igneous province, Antarctica | |
Nelson, Demian A.1; Cottle, John M.1; Schoene, Blair2 | |
2020-05-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2020 |
卷号 | 132期号:5-6页码:1201-1216 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Butcher Ridge igneous complex, Antarctica, is an similar to 6000 km(3) hypabyssal silicic intrusion containing rhythmically layered glassy rocks. Baddeleyite U-Pb geochrono-logic analysis on a sample of the Butcher Ridge igneous complex yielded an age of ca. 182.4 Ma, which confirms that it was emplaced synchronously with the Ferrar large igneous province. Rocks of the Butcher Ridge igneous complex vary from basaltic andesite to rhyolite, and so the inferred volume of the Butcher Ridge igneous complex makes it the most voluminous silicic component of the Ferrar large igneous province. Major-element, trace-element, and isotopic data combined with binary mixing, assimilation-fractional crystallization (AFC), and energy-constrained AFC models are consistent with formation of Butcher Ridge igneous complex silicic rocks by contamination of mafic Ferrar parental magma(s) with local Paleozoic plutonic basement rocks. Field and petrographic observations and evidence for alkali ion exchange suggest that the kilometer-long, meter-thick enigmatic rhythmic layering formed as a result of secondary hydration and devitrification of volcanic glass along parallel fracture networks. The regularity and scale of fracturing/layering imply a thermally driven process that occurred during shallow emplacement and supercooling of the intrusion in the upper crust. We suggest that layering observed in the Butcher Ridge igneous complex is analogous to that reported from terrestrial and Martian cryptodomes, and therefore it is an ideal locality at which to study layering processes in igneous bodies. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000530917400020 |
WOS关键词 | LONG-DISTANCE TRANSPORT ; DACITE CRYPTODOME ; DOLERITE SILLS ; VICTORIA-LAND ; DEVITRIFICATION ; CALIBRATION ; VOLCANISM ; TEXTURES ; FRACTURE ; EXCHANGE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279458 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA; 2.Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA |
推荐引用方式 GB/T 7714 | Nelson, Demian A.,Cottle, John M.,Schoene, Blair. Butcher Ridge igneous complex: A glassy layered silicic magma distribution center in the Ferrar large igneous province, Antarctica[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(5-6):1201-1216. |
APA | Nelson, Demian A.,Cottle, John M.,&Schoene, Blair.(2020).Butcher Ridge igneous complex: A glassy layered silicic magma distribution center in the Ferrar large igneous province, Antarctica.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(5-6),1201-1216. |
MLA | Nelson, Demian A.,et al."Butcher Ridge igneous complex: A glassy layered silicic magma distribution center in the Ferrar large igneous province, Antarctica".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.5-6(2020):1201-1216. |
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