从福德冈野坝漂流而来的泰国湾浮石碎屑的岩石学特征

IF 1 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Geochemical Journal Pub Date : 2022-01-01 DOI:10.2343/geochemj.gj22011

Kenta Yoshida, Y. Tamura, Tomoki Sato, C. Sangmanee, R. Puttapreecha, S. Ono

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引用次数: 5

摘要

2021年8月13日，西北太平洋的福德冈野坝火山喷发产生了大量浮石，向西漂移了约1300公里，到达日本西南群岛和一定程度。2022年2月，泰国湾沿岸沉积了与FOB浮石特征相似的浮石。在泰国宋卡省沉积的浮石碎屑，粒度较细，横跨南海西南方向2800 km。

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Petrographic characteristics in the pumice clast deposited along the Gulf of Thailand, drifted from Fukutoku-Oka-no-Ba

The 2021 eruption of Fukutoku-Oka-no-Ba (FOB) in the northwest Pacific on 13 August 2021 produced a large volume of pumice that drifted westward for ~1300 km to the Nansei Islands, Japan, and some extent. In February 2022, pumice with similar characteristics to the FOB pumice was deposited along the Gulf of Thailand. The pumice clasts deposited in Songkhla Province, Thailand, were fine-grained with <4 cm in size and rounded. Most of the clasts consisted of clinopyroxene, plagioclase (andesine), and olivine phenocrysts in a vesiculated grey groundmass, with black-coloured spots exhibiting signatures of a basaltic magma. The whole-rock compositions of the pumice are trachytic, with 61 mass% SiO 2 and 9 mass% total alkali (Na 2 O + K 2 O). The overall characteristics in the pumice from Thailand are similar to those in FOB pumice. These pumice in Thailand were from the 2021 FOB eruption, and drifted >2800 km south-westward across the South China Sea.

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来源期刊

Geochemical Journal 地学-地球化学与地球物理

CiteScore

1.70

自引率

12.50%

发文量

审稿时长

6 months

期刊介绍： Geochemical Journal is an international journal devoted to original research papers in geochemistry and cosmochemistry. It is the primary journal of the Geochemical Society of Japan. Areas of research are as follows: Cosmochemistry; Mineral and Rock Chemistry; Volcanology and Hydrothermal Chemistry; Isotope Geochemistry and Geochronology; Atmospheric Chemistry; Hydro- and Marine Chemistry; Organic Geochemistry; Environmental Chemistry.