| 山东蒙阴金伯利岩带地球化学特征和源区性质 |
| |
| 引用本文： | 王海芹,禚传源,王秀凤,牛志力,马晓东,褚志远,李胜虎,吕青,马莉.山东蒙阴金伯利岩带地球化学特征和源区性质[J].山东国土资源,2023,39(2):17-24. |
| |
| 作者姓名： | 王海芹 禚传源 王秀凤 牛志力 马晓东 褚志远 李胜虎 吕青 马莉 |
| |
| 作者单位： | 山东省地质科学研究院，山东省金属矿产成矿地质过程与资源利用重点实验室，国土资源部金矿成矿地质过程与资源利用重点实验室;山东省第七地质矿产勘查院;山东省地质调查院 |
| |
| 摘 要： | 通过主量、微量和稀土元素对山东蒙阴地区的3个金伯利岩带的金伯利岩、辉绿岩、煌斑岩地球化学特征进行分析研究。结果表明，金伯利岩的岩性偏碱性且富钾，K2O、TiO2、P2O5比一般的超基性岩石含量明显高；微量元素中Ba、Th、Ta、Cr、Ni元素含量明显高，Sr和Y、Yb含量相对原始地幔偏低。金伯利岩稀土元素总量偏高、轻稀土富集，重稀土亏损。总体无明显的Eu负异常。暗示了深部地幔成因的金伯利岩岩浆分异程度较低，基性程度相对高，岩浆混合了深部的榴辉岩和相对较浅的地幔橄榄岩，可能存在二辉橄榄岩和榴辉岩、花岗质等包体捕掳体来源的混杂性。从地幔深部的高温高压的环境下，金伯利岩岩浆携带深部的金刚石矿物捕掳体沿辉绿岩侵位通道侵入上涌，在接近地表，温压骤降，岩浆岩隐爆就位，最后形成常马、西峪、坡里三个金伯利岩带。
|
| 关 键 词： | 金伯利岩带 金刚石 地球化学 地幔成因 山东蒙阴 |
Analysis on Geochemical Characteristics and Source Types of Kimberlite Belt in Mengyin County in Shandong Province |
| |
| WANG Haiqin,ZHUO Chuanyuan,WANG Xiufeng,NIU Zhili,MA Xiaodong,CHU Zhiyuan,LI Shenghu,LV Qing,MA Li.Analysis on Geochemical Characteristics and Source Types of Kimberlite Belt in Mengyin County in Shandong Province[J].Land and Resources in SHANDONG Province,2023,39(2):17-24. |
| |
| Authors: | WANG Haiqin ZHUO Chuanyuan WANG Xiufeng NIU Zhili MA Xiaodong CHU Zhiyuan LI Shenghu LV Qing MA Li |
| |
| Abstract: | In this paper, geochemical characteristics of kimberlite, diabase and lamprophyre in three kimberlite belts in Mengyin area have been studied in terms of major, trace and rare earth elements. The lithology of kimberlite in Mengyin area is alkaline and rich in potassium. The contents of K2O, TiO2, P2O 5 are significantly higher than that of ordinary ultrabasic rocks. The contents of Ba, Th, Ta, Cr and Ni in trace elements are obviously high, and the contents of Sr, Y and Yb are relatively low compared with the original mantle. The total amount of rare earth elements is high, the light rare earth elements are enriched, and the heavy rare earth elements are depleted. There is no obvious negative Eu anomaly. It is indicated that the kimberlite magma of deep mantle origin has a low degree of differentiation and a relatively high degree of basicity. The magma mixes the deep eclogite with relatively shallow mantle peridotite, and there may be a mixture of lherzolite, eclogite, granitic and other xenolith xenoliths. Under the environment of high temperature and high pressure in the deep mantle, the kimberlite magma carries the deep diamond mineral xenoliths, invading and upwelling in the channel. When approaching the surface, the temperature and pressure drop suddenly, and the magmatic rock body implosively explodes in place. Finally, three kimberlite belts, such as Changma, Xiyu, and Poli are formed. |
| |
| Keywords: | Kimberlite belt diamond geochemistry mantle origin Mengyin county in Shandong province |
|
| 点击此处可从《山东国土资源》浏览原始摘要信息 |
| 点击此处可从《山东国土资源》下载免费的PDF全文 |
|
