Petrology and Geochemistry of Jinlongdingzi Active Volcano—the Most Recent Basaltic Explosive Volcano at Longgang-中国期刊网

摘要 TheJinlongdingziactivevolcanoeruptedbefore1600a,anditisthelatestbasalticexplosivevolcanoatLonggangVolcano.ItsvolcanicproductsincludetheJinlongdingziVolcaniccone(elevation999.4m),thelavaflowandthewidely-spreadvolcanicpyroclasticsheet(sihaiPyroclasticSheet),JinlongdingzivolcanicrocksaretrachybasaltswithverysimilarREEpatternsandincompatibleelementpatterns,andtheir87Sr/86Srand143Nd/144Ndratiosrangefrom0.704846ot0.704921andfrom0.512619to0.512646,respectively.Itisrevealedthatthetrachybasalthasthecharacterofprimarymagmaderiveddirectlyfrommantlesourceswithverylittleevolutionandcrustcontaminationduringitsascending.TheyoungermantlexenolithsdemonstratethatthemantlesourceoftheJinlongdingziVolcaoishydrous,withrelativelylowtemperature.

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Petrology and Geochemistry of Jinlongdingzi Active Volcano—the Most Recent Basaltic Explosive Volcano at Longgang

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Petrology and Geochemistry of Jinlongdingzi Active Volcano—the Most Recent Basaltic Explosive Volcano at Longgang

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