贵州织金磷矿岩稀土元素地球化学特征研究
STUDY ON REE GEOCHEMISTRY OF ZHIJIN PHOSPHORITES ,GUIZHOU PROVINCE
查看参考文献24篇
|
文摘
|
贵州织金戈仲伍剖面戈仲伍组磷质岩主要为生物碎屑白云质、硅质磷块岩,普遍形成生物碎屑结构,以小壳类动物化石及藻类化石为主.采用电感耦合等离子体-质谱仪(ICP-MS)对戈仲伍组磷质岩样品的稀土元素含量进行测定分析,结果表明:磷质岩中普遍富集稀土元素,含稀土总量∑REE较高,尤其富集Y重稀土元素;磷质岩具Ce负异常,指示环境处于氧化程度相对较高状态;稀土元素北美页岩标准化模式曲线为帽状形态,指示在磷质岩形成过程中有生物或有机质参与作用;磷质岩普遍具Eu正异常、稀土总量较高、∑LREE/∑HREE比值较高的特征,暗示戈仲伍组磷矿具有正常海相沉积伴有海相热水沉积混合成因的特征. |
|
其他语种文摘
|
The phosphorites of Gezhongwu Formation in Zhijin county mainly consist of bioclast dolomitic and siliceous phosphorite. They generally show bioclast structure and are mainly made of small shelly fossils and alga fossils. The REE contents of phosphorites are analyzed by Finni-gan Mat Element high resolution ICP-MS. The results of analysis suggest that the phosphorites are rich in REE, especially in Y element and the total REE concentrations are high. The Zhijin phosphorites show a record of the negative Ce anomalies, which indicate an oxidzing marine depo-sitional conditions. PAAS normalized REE concentrations plotted against respective atomic num-bers are chatacterized by slight enrichment of MREE,forming the hat-shaped REE patterns. The patterns suggest that fauna played an important role in the phosphorite formation. The phospho-rite characters of positive Eu anomaly,the high 2REE and the high ratio of SLREE and SHREE suggest that Zhijin phosphorites belong to the normal marine deposition associated with hy-drothermal activity. |
|
来源
|
矿物岩石
,2004,24(4):71-75 【核心库】
|
|
关键词
|
稀土元素
;
磷矿岩
;
戈仲伍
|
|
地址
|
1.
中国科学院地球化学研究所, 矿床地球化学开放研究实验室, 贵州, 贵阳, 550002
2.
成都理工大学, 四川, 成都, 610059
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1001-6872 |
|
学科
|
地质学 |
|
基金
|
中国科学院知识创新工程重要方向项目
|
|
文献收藏号
|
CSCD:1661992
|
参考文献 共
24
共2页
|
|
1.
Wright J. Paleoredox variations in ancient oceans recorded by rare earth elements in fossil apatite[J].
Geochim Cosmochim Acta,1987,51:637-644
|
CSCD被引
154
次
|
|
|
|
|
2.
Grandjean P. The assessment of REEs patterns and 143Nd/144Nd ratio in fish remains[J].
Earth Planetary Science Letter,1987,84:181-196
|
CSCD被引
24
次
|
|
|
|
|
3.
Bertram C J. 87Sr/86Sr.
Earth Planetary Science Letter,1992,113:239-249
|
CSCD被引
15
次
|
|
|
|
|
4.
Ilyin A V. Rare-earth geochemistry of 'old' phosphorites and probability of syngenetic precipitation and accumulation of phosphate[J].
Chemical Geology,1998,144:243-256
|
CSCD被引
33
次
|
|
|
|
|
5.
Yang J. evidence for the oxygenation of Neoproterozoic seawater? [J].
Precambrian Research,1999,93:215-233
|
CSCD被引
29
次
|
|
|
|
|
6.
Mazumdar A. Rare-earth elements and stable isotope geochemistry of early Cambrian chertphosphorite assemblages from the Lower Tal Formation of the Krol Belt (lesser Himalaya.
Chemical Geology,1999,156:275-297
|
CSCD被引
37
次
|
|
|
|
|
7.
Chen D F. Possible REE constrains on the depositional and diagenetic environment of Doushantuo Formation phosphorites containing the earliest metazoan fauna[J].
Chemical Geology,2003,201:102-118
|
CSCD被引
3
次
|
|
|
|
|
8.
Cook P J. Phosphorus.
Nature,1984,308:231-236
|
CSCD被引
33
次
|
|
|
|
|
9.
张杰. 贵州织金新华含稀土磷矿床地球化学及生物成矿基本特征[J].
矿床地质,2002,21(增):930-934
|
CSCD被引
8
次
|
|
|
|
|
10.
王砚耕. 贵州上前寒武系及震旦系-寒武系界线[M].
贵州上前寒武系及震旦系-寒武系界线,1984
|
CSCD被引
10
次
|
|
|
|
|
11.
Qi L. Determination of trace elements in 26 Chinese geochemistry reference materials by inductively coupled plasma mass spectrometry [J].
Geostand Newsl,2000,24:51-63
|
CSCD被引
68
次
|
|
|
|
|
12.
杨卫东. 滇东早寒武世含磷岩系稀土元素地球化学特征及成因[J].
矿物岩石地球化学通报,1995,12(4):224-227
|
CSCD被引
13
次
|
|
|
|
|
13.
李胜荣. 湘黔地区牛蹄塘组黑色岩系稀土特征：——兼论海相热水沉积岩稀土模式.
矿物学报,1995,15(2):225-228
|
CSCD被引
110
次
|
|
|
|
|
14.
王中刚. c.
稀土元素地球化学,1989
|
CSCD被引
334
次
|
|
|
|
|
15.
McArthur J M. Rare-earth geochemistry of phosphorites [J].
Chemical Geology,1984,47:191-220
|
CSCD被引
49
次
|
|
|
|
|
16.
McArthur J M. Rare-earth geochemistry of phosphorites [J].
Chemical Geology,1984,47:191-220
|
CSCD被引
49
次
|
|
|
|
|
17.
Morad S. implication for the Cambrian oceanic anoxia and phosphogenesis[J].
Sedimentary Geology,2001,143:259-264
|
CSCD被引
42
次
|
|
|
|
|
18.
Baturin C N. Phosphorites on the sea floor[M].
Phosphorites on the sea floor,1982
|
CSCD被引
3
次
|
|
|
|
|
19.
曾允孚. 滇东磷块岩的沉积环境和成矿机理[J].
矿物岩石,1989,9(2):45-59
|
CSCD被引
21
次
|
|
|
|
|
20.
杨卫东. 滇黔磷块岩沉积学、地球化学与可持续开发战略[M].
滇黔磷块岩沉积学、地球化学与可持续开发战略,1997
|
CSCD被引
12
次
|
|
|
|
|
了解气象卫星更多信息，请访问