海南岛中酸性岩浆活动与成矿作用关系探讨

On the Relation of Magmatism with Ore-formation in the Hainan Island

海南岛位于我国环太平洋构造--岩浆成矿带的重要地段。根据岩石和同位素特征分析,认为海南岛海西—印支期的中酸性侵入岩可分为S型和I型两种成因的花岗岩,燕山期为I型花岗岩。由于复式岩体多次多阶段侵位,晚阶段的岩浆活动对早阶段岩石进一步改造并溶萃其中的成矿物质,形成大量的富含成矿物质的流体,构造应力体制转换及反复多次应力集中—释放过程式,在有利的空间位置成矿。根据中酸性侵入岩的控矿作用和对海南岛成矿规律的认识及DPIS成矿预测系统对岛内成矿远景区的预测,划分了与中酸性侵入岩有关矿床的成矿远景区,指明了多金属矿找矿方向。

The Hainan Island lies in the circum-Paciflc tectonomagmatic metallogenic belt. Petrograplalc and isotopic studies indicate that the Hercynian-Indochinese granitoids in the Hainan Island may be divided into S-type and I-type. The granitoids in the Yenshan epoch is I-type. Multiple emplacement of granitic magma resulted in various ore fluids and ore matters. The ore-forming perspective regions related to the granitoids in the Hainan Island are divided by the DPIS metallogenic prognosis system.