Tephra records from abyssal sediments off western Sumatra in recent 135 ka: evidence from Core IR-GC1

QIU Zhongyan; HAN Xiqiu; JIN Xianglong; WANG Yejian; ZHU Jihao

doi:10.1007/s13131-014-0568-5

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Article Navigation > Acta Oceanologica Sinica > 2014 > 33(12): 75-80

QIU Zhongyan, HAN Xiqiu, JIN Xianglong, WANG Yejian, ZHU Jihao. Tephra records from abyssal sediments off western Sumatra in recent 135 ka: evidence from Core IR-GC1[J]. Acta Oceanologica Sinica, 2014, 33(12): 75-80. doi: 10.1007/s13131-014-0568-5

Citation:

QIU Zhongyan, HAN Xiqiu, JIN Xianglong, WANG Yejian, ZHU Jihao. Tephra records from abyssal sediments off western Sumatra in recent 135 ka: evidence from Core IR-GC1[J]. Acta Oceanologica Sinica, 2014, 33(12): 75-80. doi: 10.1007/s13131-014-0568-5

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Tephra records from abyssal sediments off western Sumatra in recent 135 ka: evidence from Core IR-GC1

doi: 10.1007/s13131-014-0568-5

Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

Received Date: 2013-02-07
Rev Recd Date: 2013-09-13

Abstract

Abstract

Three volcanic ash layers were identified in a deep-sea Core IR-GC1 from the north-eastern Indian Ocean, adjacent to western Indonesian arc. They were dominated by glass shards with minor mineral crystals, such as plagioclase, biotite, and hornblende. According to the morphology and major element compositions of the representative glass shards, combined with the δ¹⁸O-based age, it is suggested that ash Layer A is correlated to the youngest Toba tuff (YTT), Layer B is supposed to be associated with a new eruption of Toba caldera in an age of 98 to 100 ka. Ash Layer C is different the geochemistry characteristics than those of Layer A and Layer B, suggesting that Layer C was not originated from Toba but registered another volcanic eruption event.
- geochemistry,
- glass shards,
- youngest Toba tuff,
- abyssal sediment

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References(22)

References

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