大陆科学钻探工程CCSD主孔中发现的大量流体交代脉体

徐珏; 陈振宇; 陈毓川; 王登红; 李纯杰; 余金杰; 王平安

大陆科学钻探工程CCSD主孔中发现的大量流体交代脉体

1.
中国地质科学院矿产资源研究所，北京 100037
2.
中国地质科学院，北京 100037
3.
中国地质调查局发展与研究中心，北京 100037

基金项目:

中国大陆科学钻探(CCSD) 工程项目 CCSD

国家“973”项目 2003CB716507

详细信息

作者简介:
徐珏(1941-)，女，研究员，主要从事矿床学相关研究

中图分类号: P588.3
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- 被引次数: 0
出版历程
- 收稿日期: 2006-04-09
- 刊出日期: 2006-07-25

Large Numbers of Fluid Metasomatic Veins in CCSD Main Hole

1.
Institute of Mineral Resources, Chinese Academy of Geological Sciences, Bering 100037, China
2.
Chinese Academy of Geological Sciences, Beijing 100037, China
3.
Development and Research Center, China Geological Survey, Beijing 100037, China

摘要

摘要: 在对位于苏北榴辉岩分布区中国大陆科学钻探工程CCSD5000多m主孔岩心进行岩矿鉴定的过程中, 普查发现存在各种各样的脉体, 可大致分为四大系列(1) 与超高压/高压变质阶段有关的脉体系列; (2) 与减压部分熔融阶段有关的脉体系列; (3) 与退变质(主要绿帘角闪岩相和绿片岩相) 有关的脉体系列; (4) 折返晚期超低压-低温热液脉体.尤其特别的是于3578.5~4006m深度发现了大量特殊的富含稀土矿物的脉体.CCSD主孔岩心的脉体分布广泛、类型繁多, 有的与矿化作用密切有关, 在成因上可能属于大规模地质流体交代的结果.
- CCSD /
- 脉体 /
- 流体 /
- 交代 /
- 富稀土矿物
Abstract: A variety of veins were discovered during the observation and identification of rocks from the main hole of CCSD (the China Continental Scientific Drilling Project), which is located at the eclogite area in North Jiangsu. These veins can be divided into four series:① related to the UHP/HP stage; ② related to the decompression and partial melting stage; ③ related to the retrograde metamorphism stage; ④ related to the late exhumation stage. Especially, large numbers of REE-mineral-rich veins were found at depths of 3578.5-4006m. These veins from the CCSD main hole were widely distributed and some were closely related to mineralization. In genesis, they may be the result of geological fluid metasomatism on a large scale.
- CCSD /
- veins /
- fluid /
- metasomatism /
- REE-rich mineral

HTML全文

图 1 富含稀土矿物的脉体的背散射电子图像

Ab.钠长石; All.褐帘石; Bat.重晶石; Bio.黑云母; Cal.方解石; Kf.钾长石; Mag.磁铁矿; Qtz.石英; Pat.氟碳钙铈(钇) 矿; Py.黄铁矿; Rut.金红石; Tvt.氟钇钙矿; Zir.锆石

Fig. 1. Back-scattering electron image of REE-mineral-rich veins

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表 1 CCSD主孔3578.5~4006m岩石心段主要稀土矿物的电子探针分析成分结果

Table 1. Results of electron probe analysis of REE minerals from CCSD at the depth of 3578.5-4006m

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