Relationship between crater size and ejecta volume of recent magmatic and phreato‐magmatic eruptions: Implications for energy partitioning
Relationship between crater size and ejecta volume of recent magmatic and phreato‐magmatic eruptions: Implications for energy partitioning
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最近岩浆和岩浆喷发的火山口大小和喷射物体积之间的关系：对能量分配的影响
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
H. Taniguchi
中科院分区：
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作者：
Hiroaki Sato;H. Taniguchi
现代岩浆喷发和浅成岩浆喷发的火山口直径(D以米为单位)与喷射量(V以立方米为单位)的关系式分别为D=0.11V0.42和D=0.97V0.36。浅成岩浆喷发的火山口直径大约是类似喷发体积的岩浆喷发的2-5倍，这表明浅成岩浆喷发中岩浆-水的相互作用产生的火山口形成的机械能比同等体积的岩浆喷发大1-2个数量级。浅成岩浆喷发过程中热能与动能的转换比估计为0.7-10%，这与目前有关熔融-水相互作用的实验室实验数据是一致的[Wohletz和McQueen，1984]。
Relationships between crater diameter (D in meters) and ejecta volume (V in cubic meters) of recent magmatic and phreato‐magmatic eruptions are expressed as D=0.11 V0.42, and D=0.97 V0.36, respectively. Crater diameters of phreato‐magmatic eruptions are ca. 2–5 times larger than those of magmatic eruptions of similar ejecta volume, suggesting that magma‐water interaction in phreato‐magmatic eruptions generated mechanical energies of crater formation 1–2 orders of magnitude larger than equivalent‐volume magmatic eruptions. The conversion ratio of thermal energy to kinetic energy in phreato‐magmatic eruptions is estimated to be 0.7–10 percent, which is in accord with the presently available data of laboratory experiments on melt‐water interaction [Wohletz and McQueen, 1984].