[1]周琦忠,张 琪,冯学知,等.苏北柳泉地区煌斑岩地球化学特征及岩石成因[J].华东地质,2020,41(03):246-255.[doi:10.16788/j.hddz.32-1865/P.2020.03.006]
 ZHOU Qi-zhong,ZHANG Qi,FENG Xue-zhi,et al.Geochemical characteristics and petrogenesis of the lamprophyres in Liuquan area of northern Jiangsu Province[J].East China Geology,2020,41(03):246-255.[doi:10.16788/j.hddz.32-1865/P.2020.03.006]
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苏北柳泉地区煌斑岩地球化学特征及岩石成因()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
41
期数:
2020年03期
页码:
246-255
栏目:
出版日期:
2020-09-15

文章信息/Info

Title:
Geochemical characteristics and petrogenesis of the lamprophyres in Liuquan area of northern Jiangsu Province
文章编号:
2096-1871(2020)03-246-10
作者:
周琦忠张 琪冯学知王 博邱 磊王国强
(江苏省地质矿产局第五地质大队,徐州 221004)
Author(s):
ZHOU Qi-zhong ZHANG Qi FENG Xue-zhi WANG Bo QIU Lei WANG Guo-qiang
(NO. 5 Geological Team of Jiangsu Geology and Mineral Bureau, Xuzhou 221004, China)
关键词:
关键词: 煌斑岩 岩石地球化学 岩石成因 苏北柳泉地区
Keywords:
Key words:lamprophyre lithogeochemistry petrogenesis Liuquan area of northern Jiangsu Province
分类号:
P588.12P595
DOI:
10.16788/j.hddz.32-1865/P.2020.03.006
文献标志码:
A
摘要:
摘要: 柳泉地区是苏北地区煌斑岩的集中分布区,与之相伴的还有金伯利岩和橄榄玄武玢岩。通过研究该区煌斑岩的岩石学及岩石地球化学特征,进一步探讨其岩石成因及构造环境。研究表明:柳泉地区煌斑岩为同源岩浆演化的产物,整体属于钾质碱性煌斑岩,具有低硅、富铁镁钛的特点,大离子亲石元素和轻稀土元素相对富集,高场强元素和重稀土元素相对亏损。柳泉地区煌斑岩形成于中—新生代太平洋板块俯冲、岩石圈减薄的构造背景下,起源于深75~100 km、受俯冲沉积物改造形成的富集岩石圈地幔源区,经含角闪石石榴石二辉橄榄岩部分熔融,并沿构造薄弱带上侵至地壳浅部形成的。
Abstract:
Abstract:The Liuquan area is the concentrated distribution area of lamprophyres in northern Jiangsu, accompanied by kimberlites, olivine basaltic porphyrites and so on. By studying the petrology and lithogeochemical characteristics of lamprophyres in the area, the petrogenesis and tectonic setting are discussed further in this paper. The results show that the lamprophyres are the product of comagmatic evolution, belonging to potassium alkaline series, characterized by low Si and rich Fe, Mg, Ca and Ti, enrichment of LILEs and LREEs, and depletion of HSFEs and HREEs generally. They are formed under the background of Meso-Cenozoic Pacific plate subduction and lithospheric thinning, originating from the enriched lithospheric mantle source formed by subducted sediments at a depth of about 75~100 km, with the nature of low-degree partial melting of amphibole garnet-bearing lherzolite intruding into the shallow crust along the tectonic weak zones.

相似文献/References:

[1]高存山,褚志远,张 勇,等.山东临沂东小山地区煌斑岩地球化学特征及其对成矿的启示[J].华东地质,2020,41(03):271.[doi:10.16788/j.hddz.32-1865/P.2020.03.009]
 GAO Cun-shan,CHU Zhi-yuan,ZHANG Yong,et al.Geochemical characteristics and indication for mineralization of Dongxiaoshan lamprophyre in Linyi City, Shandong Province[J].East China Geology,2020,41(03):271.[doi:10.16788/j.hddz.32-1865/P.2020.03.009]

备注/Memo

备注/Memo:
*收稿日期:2020-04-01 修订日期:2020-06-16 责任编辑:谭桂丽
基金项目:江苏省地质矿产勘查局“苏北岩石圈地幔及金刚石找矿研究(编号:苏地矿发[2018]82号)”和“江苏省徐州市柳泉—江庄地区金刚石原生矿调查(编号:苏地矿发[2019]104号)”项目联合资助。
第一作者简介:周琦忠,1990年生,男,工程师,主要从事地质矿产勘查工作。
更新日期/Last Update: 2020-09-09