Magma production and growth of the lava dome of the Soufriere Hills Volcano, Montserrat, West Indies: November 1995 to December 1997

Magma production and growth of the lava dome of the Soufriere Hills Volcano, Montserrat, West Indies: November 1995 to December 1997
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西印度群岛蒙特塞拉特苏弗里埃尔山火山熔岩穹顶的岩浆产生和生长:1995年11月至1997年12月

DOI:
10.1029/98gl00639
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发表时间:
1998
影响因子:
5.2
通讯作者:
R. Watts
R. Watts
中科院分区:
地球科学1区
文献类型:
--
作者:
R. S. J. Sparks;S. Young;J. Barclay;E. Calder;P. Cole;B. Darroux;M. H. Davies;T. Druitt;C. Harford;R. Herd;Michael James;A. Lejeune;S. Loughlin;G. Norton;G. Skerrit;M. Stasiuk;N. S. Stevens;J. Toothill;G. Wadge;R. Watts

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1995年11月至1997年12月,安山岩岩浆喷发总量为246 × 106 (DRE) m³,分为穹丘93 × 106 m³、火山碎屑流沉积125 × 106 m³和爆炸喷射物28 × 106 m³。前11周岩浆流出率较低(0.5 m³/s)。从1996年2月至1997年5月,排放率平均为2.1立方米/秒,但波动很大,并随着时间的推移而增加。可以识别持续几个月的三个脉冲,放电速率达到3至8 m³/s。持续几天的短期增长脉动达到超过10 m³/s的排放速率,并且有几天到几周的时间圆顶增长< 0.5 m³/s。从1997年5月到1997年12月,平均排放率为7.5 m³/s。观测结果表明这是一个开放的岩浆系统。
From November 1995 to December 1997 a total volume of 246 × 106 (DRE) m³ of andesite magma erupted, partitioned into 93 × 106 m³ of the dome, 125 × 106 m³ of pyroclastic flow deposits and 28 × 106 m³ of explosive ejecta. In the first 11 weeks magma discharge rate was low (0.5 m³/s). From February 1996 to May 1997 discharge rates have averaged 2.1 m³/s, but have fluctuated significantly and have increased with time. Three pulses lasting a few months can be recognised with discharge rates reaching 3 to 8 m³/s. Short term pulsations in growth lasting a few days reach discharge rates of over 10 m³/s and there are periods of days to a few weeks when dome growth is < 0.5 m³/s. Discharge rate increased from May 1997 with an average rate of 7.5 m³/s to December 1997. The observations indicate an open magmatic system.