收稿日期: 2022-09-27
修回日期: 2023-02-09
网络出版日期: 2023-07-20
基金资助
新北京垚鑫矿业公司委托项目“海南定安金矿成矿背景、控矿条件和勘查靶区研究”、陕西省自然科学基金项目“地质大数据挖掘与智能预测找矿靶区实验研究”(2023-JC-YB-261);“利用飞秒激光质谱研究钨矿蚀变带的微量元素分异及找矿标志——以南秦岭棋盘沟钨矿为例”(2023-JC-YB-276)
Element Geochemical Characteristics and Significance of Ore，Wall Rock and Stratum in Fuwen Gold Deposit，Hainan
Received date: 2022-09-27
Revised date: 2023-02-09
Online published: 2023-07-20
崔文玮 , 晁会霞 , 何虎军 , 杨兴科 , 杨俊杰 , 朱昊磊 , 吴旭 . 海南富文金矿床矿石、围岩及地层元素地球化学特征及地质意义[J]. 黄金科学技术, 2023 , 31(3) : 423 -432 . DOI: 10.11872/j.issn.1005-2518.2023.03.128
The Fuwen gold deposit is located in Fuwen County，central and northern Hainan Province，and also in the northern margin of the Wuzhishan fold belt of the South China fold system.The Early Cretaceous Lumuwan Formation （K1l） is mainly exposed in the ore district.The structure in this area is developed，the magmatic volcanic movement is more frequent，the gold mineralization points are more，and the metallogenic geological conditions are better.Geological and mineral work was carried out earlier in the area，including geophysical exploration，geochemical exploration，mineral exploration，etc.，but these works focused on the ore fabric characteristics，sulfide characteristics，ore-forming fluid characteristics and isotope date of the deposit，and the research methods of element geochemical testing of gold deposits are less involved.In order to further explore the source of ore-forming materials of Fuwen gold deposit，this paper analyzed the main，trace and rare earth elements of quartz vein type ore，clastic sedimentary rock and magmatic rock of Lumuwan formation.The chemical analysis of the main components of the clastic sedimentary rocks in Lumuwan Formation shows that the weathering and alteration of the source area are weak，which reflects that the sedimentary rocks were first deposited in the active tectonic belt，and the provenance is mainly felsic rocks.The results of chemical analysis of rare earth elements show that REE is characterized by enriched LREE，lost HREE，and right-inclined normalized curve patterns，and the standardized distribution curves of REE in each sample are basically the same.It is inferred that the ore has homology with strata and rock masses.The results of trace element chemical analysis show that the ore，Lumuwan Formation strata and rock mass （quartz diorite，fine-grained granite） are significantly lost in Ba，Nb，Sr，Hf and enriched in Rb，Th，U，Pb，Sm，and their distribution trends are similar.Comprehensive analysis shows that the formation of Fuwen gold ore body in Hainan is closely related to Lumuwan strata and rock mass.Both of them provide ore-forming materials for the formation of ore bodies，and the deposit type is a magmatic hydrothermal deposit.
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