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距今１６００ 年前喷发的金龙顶子火山是龙岗火山群中一座最年轻的近代活动火山， 它的喷发物包括金龙顶子火山锥体 （海拔９９９．４ｍ ）、熔岩流及其广布的火山碎屑席 （四海火山渣层）。金龙顶子火山岩为单一的粗面玄武岩， 有着极为相似的ＲＥＥ和不相容元素分布模式， ８７Ｓｒ／８６Ｓｒ和１４３Ｎｄ／１４４Ｎｄ 分别变化于０．７０４８４６～０．７０４９２１ 和０．５１２６１９～０．０．５１２６４６， 这反映了它们直接来自地幔源区， 岩浆上升过程极少演化和壳源混染， 具有较为原始的岩浆特点。年轻火山岩中的幔源捕虏体提供了该区存在相对低温 （～９００℃） 含水的地幔。
The Golden Dragon Top Volcano erupting 1,600 years ago is the youngest modern active volcano in the Longgang volcano group. Its eruptions include the Jinlongdingzi volcano cone (999.4m above sea level), the lava flow and its widespread volcano Debris seats (universal volcanic slag layer). The Jinlongdingzi volcanic rock is a single rough basalt with a very similar pattern of REE and incompatible elements. The 87Sr / 86Sr and 143Nd / 144Nd change from 0.704846 to 0.704921 and from 0.512619 to 0.06, respectively. 512646, which reflects that they are directly from the mantle source area, the evolution of the magma is rarely evolution and shell source contamination, with a more primitive magmatic characteristics. Mantle-derived xenoliths in young volcanic rocks provide mantle with relatively low-temperature (~ 900 ° C) water in the area.