CAJ | 학술논문

骑田岭岩体位于湖南省郴州市,为一中生代复式岩体。本文运用电感耦合等离子质谱技术(ICP-MS)对穿越骑田岭岩体的大剖面上的花岗岩样品,进行了稀有金属Li、Rb、Sr、Cs、Nb、Ta、Be、Zr、Hf 含量分析测试。结果表明：(1)岩体明显富集Li、Rb、Cs、Be、Zr,高于华南燕山期花岗岩平均值, Sr、Nb、Ta 则相对亏损；(2) Li、Rb、Cs 等稀有金属自西向东逐渐升高, Sr 则逐渐降低, Nb、Ta、Hf 等除了个别地方出现“特高值”之外,基本保持稳定；(3)相比于同时期的邻区香花岭岩体,骑田岭岩体虽然富集了一定量的稀有金属,但要形成或找到香花岭这样的稀有金属矿床还要注意剥蚀、保存条件。结合地球物理特征和岩体地质特征,认为骑田岭岩体自南东向北西斜向侵位的可能性很大,这可能也是造成骑田岭岩体稀有金属元素分带的原因。
기전령암체위우호남성침주시,위일중생대복식암체。본문운용전감우합등리자질보기술(ICP-MS)대천월기전령암체적대부면상적화강암양품,진행료희유금속Li、Rb、Sr、Cs、Nb、Ta、Be、Zr、Hf 함량분석측시。결과표명：(1)암체명현부집Li、Rb、Cs、Be、Zr,고우화남연산기화강암평균치, Sr、Nb、Ta 칙상대우손；(2) Li、Rb、Cs 등희유금속자서향동축점승고, Sr 칙축점강저, Nb、Ta、Hf 등제료개별지방출현“특고치”지외,기본보지은정；(3)상비우동시기적린구향화령암체,기전령암체수연부집료일정량적희유금속,단요형성혹조도향화령저양적희유금속광상환요주의박식、보존조건。결합지구물리특정화암체지질특정,인위기전령암체자남동향북서사향침위적가능성흔대,저가능야시조성기전령암체희유금속원소분대적원인。
The Qitianling granites in Chenzhou city, Hunan province, is a Mesozoic batholith. In this study, granitic rock samples across the Qitianling Geological-Geochemical-Geophysical profile were analyzed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to measure the concentrations of rare metal elements, including Li, Rb, Sr, Cs, Nb, Ta, Be, Zr, Hf. The results showed that:(1) samples are significantly enriched in Li, Rb, Cs, Be and Zr, which are higher than the average concentrations of granite in South China, while elements like Sr, Nb and Ta are relatively depleted;(2) the concentrations of elements like Li, Rb, Cs increase gradually from west to east of the batholith, while the concentrations of Sr is gradually decrease. Elements like Nb, Ta and Hf remain stable except occasional “peak value”; (3) compared with the neighborhood Xianghualing pluton that is genetically related to the Xianghualing rare metal deposit, the Qitianling batholith is of the same geological stage, but the rare metal contents in Qitianling are not so high as to be a potential or as a target for exploration. That is to say, it is difficult to find new rare metal deposits as those formed around the Xianghualing pluton, considering the rare metal contents and stronge erosion of the Qitianling batholith. Based on the geophysical and geological characteristics of the rocks, it is considered that the Qitianling batholith was intruded from southeast to northwest, which might be the cause of rare element zonation across the Qitianling batholith.