钾质斑脱岩的研究进展
ADVANCES IN RESEARCH ON K-BENTONITE ZHOU
查看参考文献43篇
文摘
|
从矿物学、地球化学两个方面对钾质斑脱岩的研究进展进行综合评述。矿物学研究表明,钾质斑脱岩为岩浆成因,由粘土矿物与非粘土矿物组成,粘土矿物以伊.蒙混层矿物和伊利石为主,非粘土矿物包括原生斑晶矿物和次生矿物。钾质斑脱岩的矿物学研究有助于地层对比难题的解决,亦将促进古大陆再造研究。钾质斑脱岩及斑脱岩的主量元素数据统计结果显示,钾质斑脱岩以相对富钾为特征,K_2O含量一般大于3.5%。微量元素数据统计表明,钾质斑脱岩的微量元素以,Th、U的明显富集为特征,同时均具有负Eu异常并缺乏负Ce异常。通过对早寒武世、奥陶纪及志留纪的钾质斑脱岩的微量元素特征进行对比研究,认为不同时期钾质斑脱岩的微量元素与REE的配分模式表现出不同的特征,尤其是Nb/Y、Th/U等微量元素比值及(Ia/Yb)_N、(Ia/Sm)_N、(G/Yb)_N、δEu和δCe等稀土元素参数的差异明显。经对比,初步判定滇东石岩头组底部钾质斑脱岩与遵义石岩头组钾质斑脱岩可能不属于同一期火山活动的产物。 |
其他语种文摘
|
Advances in research on K-bentonite have been systematically reviewed in this paper. Mineralogical study of K- bentonite showed that K-bentonite is of magmatic origin and that K-bentonite consists of clay minerals and non-clay ones; the clay minerals are dominated by mixed-layer illite-smectite and illite while the non-clay assemblage is composed of phenocrysts and secondary minerals. Previous major element data for K-bentonites and bentonites in literature were statistically processed. The results suggested that K-bentonite is characteristically rich in K compared with bentonite, and its K_2O contents are generally higher than 3.5%. The trace element characteristics of K-bentonite are typified by remarkable Th and U enrichment. Almost all of the K-bentonites yield a negative Eu anomaly , no Ce depletion is recognized in the REE distribution patterns. Comparing the trace element characteristics of Early Cambrian, Ordovician and Silurian K-bentonites, the authors concluded that K-bentonites of different ages have different trace element characteristics. Especially, ratios of Nb/Y and Th/U and REE parameters such as (La/Yb)_N, (La/Sm)_N, (Gd/Yb)_N, δEu and δCe are discriminative. The preliminary correlation shows that K-bentonite at the bottom of the Shiyantou Formation in eastern Yurman cannot be correlated with that from the same formation at Zunyi, Guizhou Province. |
来源
|
矿物学报
,2007,27(3/4):351-359 【核心库】
|
关键词
|
钾质斑脱岩
;
岩石术语
;
地球化学
|
地址
|
中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵州, 贵阳, 550002
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
1000-4734 |
学科
|
地质学 |
基金
|
国家自然科学基金
|
文献收藏号
|
CSCD:3057096
|
参考文献 共
43
共3页
|
1.
Calarge L M. A bentonite bed in the Acegua(RS Brazil)and Melo(Uruguay)areas:a highly crystallized montmorillonite.
Journal of South American Earth Sciences,2003,16:187-198
|
被引
6
次
|
|
|
|
2.
Su W. K-bentonite beds and high-resolution integrated stratigraphy of the uppermost Ordovician Wufeng and the lowest Silurian Longmaxi formations in South China.
Science in China. Series D, Earth Sciences (in English),2003,46:1121-1133
|
被引
5
次
|
|
|
|
3.
张俊明. 滇东早寒武世梅树村期浅色粘土岩层的地球化学特征和地质意义.
岩石学报,1997,13:100-110
|
被引
17
次
|
|
|
|
4.
罗泰义. 贵州遵义早寒武世碱性火山活动的初步研究.
岩石学报
|
被引
1
次
|
|
|
|
5.
刘钦甫. 华北晚古生代煤系高岭岩微量元素和稀土元素地球化学研究.
地球化学,1998,27(2):196-203
|
被引
25
次
|
|
|
|
6.
Roberts B. Cambrian and Ordovician metabentonites and their relevance to the origins of associated mudrocks in the northern sector of the Lower Palaeozoic Welsh marginal basin.
Geological magazine,1990,127(1):31-43
|
被引
12
次
|
|
|
|
7.
Kiipli T. Correlation of Telychian(Silurian)altered volcanic ash beds in Estonia Sweden and Norway.
Norsk Geologisk Tidsskrift,2001,81:179-193
|
被引
5
次
|
|
|
|
8.
Huff W D. Castlemainian K-bentonite beds in the Ningkuo Formation of the Jiangshan County-The first lower Ordovician K-bentonites found in China.
alaeoworld,1995(5):101-103
|
被引
1
次
|
|
|
|
9.
罗惠麟. 云南晋宁、安宁地区早寒武世磷块岩沉积环境分析.
成都理工学院学报,1998,25(2):269-275
|
被引
7
次
|
|
|
|
10.
张勤文. 地层界线上灾变事件标志和成因的探讨.
地球学报,1994(3-4):192-199
|
被引
8
次
|
|
|
|
11.
Warr L. Hydration of bentonite in natural waters:Application ofconfined volumewet-cell X-ray diffractometry.
Physics and Chemistry of the Earth,2007,32:247-258
|
被引
2
次
|
|
|
|
12.
Zhou J C. Copper(gold)and non-metal deposits hosted in Mesozoic shoshonite and K-rich talc-alkaline series from Lishui in the Lower Yangtze region China.
ournal of Geochemical Exploration,1996,57:273-283
|
被引
7
次
|
|
|
|
13.
Compston W. Interpretations of SHRIMP and isotope dilution zircon ages for the geological time-scale:I.The early Ordovician and late Cambrian.
Mineralogical Magazine,2000,64(1):43-57
|
被引
9
次
|
|
|
|
14.
Jenkins R J F. Age and biostratigraphy of Early Cambrian tuffs from SE Australia and southern China.
Journal of the Geological Society,2002,159:645-658
|
被引
26
次
|
|
|
|
15.
Toulkeridis T. Multimethod (K-Ar,Rb-Sr,Sm-Nd) dating of bentonite minerals from the eastern United States.
Basin Research,1998,10:261-270
|
被引
1
次
|
|
|
|
16.
Min K. 40Ar/39Ar dating of Ordovician K-bentonites in Laurentia and Baltoscandia.
Earth and Planetary Science Letters,2001,185:121-134
|
被引
6
次
|
|
|
|
17.
Samson S D. 40Ar/39Ar and Nd-Sr isotopic characteristics of mid-Ordovician North American K-bentonites:A test of early Paleozic Laurentia-Gondwana interactions.
Tectonics,1996,15:1084-1092
|
被引
4
次
|
|
|
|
18.
Dong H. 40Ar/39Ar illite dating of Late Caledonian (Acadian) metamorphism and cooling of K-bentonites and slates from the Welsh Basin,U...
Earth and Planetary Science Letters,1997,150:337-351
|
被引
6
次
|
|
|
|
19.
Kolata D R. Chemical correlation of K-bentonite beds in the Middle Ordovician Decorah Subgroup upper Mississippi Valley.
Geology,1987,15:208-211
|
被引
8
次
|
|
|
|
20.
Huff W D. Gigantic Ordovician volcanic ash fall in North America and Europe:Biological tectonomagmatic and event-stratigraphic significance.
Geology,1992,20:875-878
|
被引
34
次
|
|
|
|
|