| QIU Zhongyan,HAN Xiqiu,JIN Xianglong,WANG Yejian,ZHU Jihao. 2014. Tephra records from abyssal sediments off western Sumatra in recent 135 ka: evidence from Core IR-GC1. Acta Oceanologica Sinica, 33(12):75－80 |
| Tephra records from abyssal sediments off western Sumatra in recent 135 ka: evidence from Core IR-GC1 |
| 苏门答腊外海13.5万年来的火山灰记录:来自深海沉积物岩心IR-GC1的证据 |
| Received:February 07, 2013 Revised:September 13, 2013 |
| DOI：10.1007/s13131-014-0568-5 |
| Key words:geochemistry glass shards youngest Toba tuff abyssal sediment |
| 中文关键词: 地球化学 火山玻璃 末次Toba火山灰 深海沉积物 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41106052 91228101 and 41306056; the Fundamental Research Funds for National Nonprofit Institute Grant under contract No. JG0910. |
| Author Name | Affiliation | E-mail | | QIU Zhongyan | Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | HAN Xiqiu | Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | xqhan@sio.org.cn | | JIN Xianglong | Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | WANG Yejian | Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | ZHU Jihao | Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | |
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| 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. |
| 中文摘要: |
| 在印尼苏门答腊外海深海沉积物岩心IR-GC1中识别出了3个火山灰层.这些火山灰富含火山玻璃,并含少量长石、云母及角闪石等矿物颗粒.综合火山玻璃的形貌、化学成分及其氧同位素年代,认为层A来源于末次Toba火山喷发(YTT).层B被认为可能与Toba火山在98-100ka之间的一次新的喷发事件有关.而层C与层A、B在成分上有差异,表明它们的岩浆来源不同,它可能来源于周边高硅流纹质岩浆区的火山喷发. |
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