[1] Jilin Univ, Coll Earth Sci, Jianshe St 2199, Changchun 130061, Peoples R China
[2] Minist Land & Resources, Key Lab Mineral Resources Evaluat Northeast Asia, Changchun 130061, Peoples R China
[3] Ist Nazl Geofis & Vulcanol, Via Vigna Murata 605, I-00143 Rome, Italy
[4] Ist Nazl Geofis & Vulcanol, Osservatorio Vesuviano, I-80124 Naples, Italy
[5] CNR, Ist Studio Impatti Antrop & Sostenibil Ambiente Ma, I-91020 Capo Granitola, TP, Italy