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
中科院分区:
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
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.