Identification and Prediction of Volcanic Facies

2014 ◽  
pp. 113-162
Author(s):  
Qiquan Ran ◽  
Yongjun Wang ◽  
Yuanhui Sun ◽  
Lin Yan ◽  
Min Tong
Keyword(s):  
Volcanic Facies

scholarly journals Paleocene-Eocene volcanic segmentation of the Norwegian-Greenland seaway reorganized high-latitude ocean circulation

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Jussi Hovikoski ◽  
Michael B. W. Fyhn ◽  
Henrik Nøhr-Hansen ◽  
John R. Hopper ◽  
Steven Andrews ◽  
...  
Keyword(s):  
Ocean Circulation ◽  
High Latitude ◽  
Seismic Reflection ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Early Eocene ◽  
Subaerial Exposure ◽  
Thermal Maximum ◽  
Volcanic Facies

AbstractThe paleoenvironmental and paleogeographic development of the Norwegian–Greenland seaway remains poorly understood, despite its importance for the oceanographic and climatic conditions of the Paleocene–Eocene greenhouse world. Here we present analyses of the sedimentological and paleontological characteristics of Paleocene–Eocene deposits (between 63 and 47 million years old) in northeast Greenland, and investigate key unconformities and volcanic facies observed through seismic reflection imaging in offshore basins. We identify Paleocene–Eocene uplift that culminated in widespread regression, volcanism, and subaerial exposure during the Ypresian. We reconstruct the paleogeography of the northeast Atlantic–Arctic region and propose that this uplift led to fragmentation of the Norwegian–Greenland seaway during this period. We suggest that the seaway became severely restricted between about 56 and 53 million years ago, effectively isolating the Arctic from the Atlantic ocean during the Paleocene–Eocene thermal maximum and the early Eocene.

New FTIR data of calc-alkaline volcanic rocks from the Oas-Gutai Mts. and post eruption effects on the water content of phenocrysts

2020 ◽  
Author(s):  
Ákos Kővágó ◽  
Marinel Kovacs ◽  
Dóra Kesjár ◽  
Csaba Szabó ◽  
István Kovács
Keyword(s):  
Water Content ◽  
Volcanic Rocks ◽  
Parental Magma ◽  
Volcanic Eruptions ◽  
Ftir Spectra ◽  
Future Research ◽  
Calc Alkaline ◽  
Structural Hydroxyl ◽  
Volcanic Facies ◽  
Water Contents

<p>We studied volcanic rocks from the Oas-Gutai Mts. (Transylvania, Romania) to measure the ‘structural hydroxyl’ content of the nominally anhydrous minerals (NAMs such as clinopyroxene, plagioclase, quartz), from which water content of the parental magma can be estimated.  The Neogene volcanic chain of the Carpathian-Pannonian region (CPR), due to petrologic variability, is an excellent area for such investigation.</p><p>Recent FTIR studies on the calc-alkaline rocks from CPR, showed that the ‘structural hydroxyl’ content of NAMs could be modified during and after volcanic eruptions [1], [2], [3]. However, transmission FTIR-microscopy is an adequate technique for recognizing this these changes because FTIR spectra of the NAMs indicate signs in the case of hydroxyl loss [4].</p><p>For studying the pre-eruptive water contents clinopyroxenes are the most promising mineral because it has one of the lowest diffusion rates for hydroxyl in NAMs [5]. With the detailed study of the clinopyroxenes FTIR spectra, conclusions can be drawn concerning the potential post-eruptive loss of hydroxyl [4].</p><p>We have examined 8 volcanic rock samples, four dacite samples from Oas and one basalt two andesite and one rhyolite sample from the Gutai Mts. The samples show diverse volcanic facies such as lava, ignimbrite and debris avalanche. The diversity of samples is important for future research because it will help to choose the most adequate volcanic facies to estimate the magmatic equilibrium water contents.</p><p>The studied clinopyroxenes contain 83-371 ppm ‘structural hydroxyl’ content,which can be considered as normal values compared to the work of [6] where ‘structural hydroxyl’ content in clinopyroxenes show a range from 75 to 390 ppm in the mafic calc-alkaline lavas from Salina, Italy.</p><p>[1] Lloyd, A.S., Ferriss, E., Ruprecht, P., Hauri, E.H., Jicha, B.R., & Plank, T. (2016): Journal of Petrology, 57, pp. 1865-1886</p><p>[2] Biró, T., I. Kovács, D. Karátson, R. Stalder, E. Király, G. Falus, T. Fancsik, J. & Sándorné Kovács (2017): American Mineralogist, 102, pp.</p><p>[3] Pálos, Z., Kovács, I. J., Karátson, D., Biró, T., Sándorné Kovács, J., Bertalan, É., & Wesztergom, V. (2019): Central European Geology, 62(1)</p><p>[4] Patkó, L., Liptai, N., Kovács, I., Aradi, L., Xia, Q.K., Ingrin, J., Mihály, J., O'Reilly, S.Y., Griffin, W.L., Wesztergom, V., & Szabó, C. (2019): Chemical Geology, 507, pp. 23-41.</p><p>[5] Farver, J.R. (2010): Reviews in Mineralogy and Geochemistry, 72 (1), pp. 447–507.</p><p>[6] Nazzareni, S., Skogby H., & Zanazzi, P.F. (2011): Contributions to Mineralogy and Petrology, 162, pp. 275–288.</p>

Study on Volcanic Facies of Yingcheng Formation in Yaoshen Area

2013 ◽  
Vol 787 ◽  
pp. 661-663
Author(s):  
Cheng Zhi Liu ◽  
Xi Liu ◽  
Xue Du
Keyword(s):  
Seismic Data ◽  
Volcanic Eruption ◽  
Sedimentary Facies ◽  
Clastic Rock ◽  
Volcanic Breccia ◽  
Yingcheng Formation ◽  
Volcanic Lava ◽  
Volcanic Facies ◽  
Volcanic Activities

There are two classification including volcanic lava and volcanic clastic rock, totally 15 types in Yingcheng Formation, Yaoshen area. The lithology is mainly characterized as acid rhyolite, tuffs and volcanic breccia. By using logging data and seismic data, the authors come to the conclusion as follows: there existed five types of lithofacies of volcanic lava in this area, with eruption-overflow facies most widely developed. The section is characterized as eruption mixed with overflow, superposed eruption-overflow facies and volcanic sedimentary facies occurred far from the crater. There are frequent volcanic activities, multi-periodic activities of volcanic eruption developed, thus multi-periodic eruption modes were formed. This area is overlapped and connected in the plane, adjacent eruption facies are often connected, overflow facies are distributed on lave platform.

scholarly journals Early Tertiary volcanic rocks from eastern Disko and south-eastern Nûgssuaq

1987 ◽  
Vol 135 ◽  
pp. 11-17
Author(s):  
A.K Pedersen ◽  
L.M Larsen
Keyword(s):  
Volcanic Rocks ◽  
Volcanic Stratigraphy ◽  
South Eastern ◽  
Early Tertiary ◽  
Clastic Sediments ◽  
Greenland Basin ◽  
Geological Map ◽  
Volcanic Facies ◽  
Volcanic Succession ◽  
Basalt Plateau

As part of an integrated study of the interaction between sedimentary and volcanic facies in the Cretaceous-Tertiary West Greenland basin, early Tertiary extrusive and intrusive basic igneous rocks have been investigated in eastern Disko and south-eastern Nûgssuaq (fig. 1). The volcanic activity started in the early Tertiary. It was centred in the western regions of Disko and Nûgssuaq and west of the present land areas, and consequently western Disko and western Nûgssuaq have a thick and complete volcanic succession, the Vaigat and Maligât Formations (Hald & Pedersen, 1975; Pedersen, 1975a, 1985). The coeval deposits in the eastern part of the basin are clastic sediments of the Upper Atanikerdluk Formation (Koch, 1959). With time, the volcanic deposits prograded eastwards, and eventually the whole area was covered by a coherent basalt plateau. The present study attempts to extend the established volcanic stratigraphy from western Disko and the geological map sheets 1:100 000 Qutdligssat (published in 1976) and Mellemfjord (published in 1987) into eastern Disko and eastern Nûgssuaq where volcanic rocks and sediments interfinger.

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