内蒙古营盘湾-东五分子一带的色尔腾山岩群的厘定及地质意义
Sertengshan Group in Yingpanwan-Dongwufenzi aera, Inner Mongolia: Revision and its geological significance
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文摘
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色尔腾山岩群是华北克拉通西部陆块阴山地块早前寒武纪变质基底的主要组成部分,对探讨华北克拉通早前寒武纪基底构造演化有着十分重要的意义。本文根据对营盘湾-东五分子一带的色尔腾山岩群的地质填图、剖面测量、地球化学分析和SHRIMP测年,对色尔腾山岩群的组成、原岩建造、形成环境和形成时代进行了讨论。认为色尔腾山岩群由陈三沟岩组、柳树沟岩组和东五分子岩组组成,陈三沟岩组由灰黑色细粒斜长角闪岩、浅灰色细粒黑云斜长片麻岩夹角闪斜长片麻岩组成;东五分子岩组下段由细粒含石英黑云斜长角闪岩、黑云角闪斜长片麻岩、黑云斜长片麻岩呈韵律产出,顶部为灰白色细粒黑云斜长片麻岩夹薄层磁铁黑云斜长片麻岩,上段为由细粒黑云角闪片岩与浅肉红色黑云长英片麻岩互层,顶部有薄层白色透闪石大理岩;柳树沟岩组以角闪片岩、二云母片岩、二云石英片岩、石榴黑云片岩、黑云母片岩为特征。其原岩总体构成表现为:下部以火山岩为主,上部以碎屑沉积岩和化学沉积岩为主的火山-碎屑沉积建造。火山岩明显富碱,其中酸性火山岩明显富铝、贫镁;具有较高的大离子亲石元素含量、较低的Y和重稀土元素含量;具有轻稀土富集、重稀土亏损的稀土分布形式。地球化学特征与埃达克岩类似,形成于活动大陆边缘的构造环境下。通过对东五分子岩组上部互层产出的细粒长英片麻岩和黑云母片岩分别取样,进行锆石U-Pb SHRIMP测年,分别获得1980 ±9Ma、1946 ± 16Ma的成岩年龄和1901 ± 15Ma、1893 ±66Ma的变质年龄。综上所述可以得出,色尔腾山岩群的形成于1.95~1.98Ga之间,是在类似埃达克岩的活动大陆边缘岛弧环境下沉积的,在1.9Ga左右发生碰撞造山而发生变质。 |
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其他语种文摘
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Sertengshan Group is an important component of Early Precambrian metamorphic basement in Yinshan Block,which is in the western landmass in the North China Craton. It is significant to study the tectonic evolution of the Early Precambrian North China Craton. According to the geological mapping,profiles,geochemical analysis and SHRIMP dating,this article discussed on the composition, primary rock formation, formation environment and the age of the Sertengshan Group. The author believes that the Sertengshan Group is composed of Chensangou Formation, Liushugou Formation and Dongwufenzi Formation. The Chensangou Formation consists of dark gray fine-grained amphibolite and light gray fine-grained biotite plagiogneiss intercalated with hornblende plagiogneiss. The lower member of the Dongwufenzi Formation consists of fine-grained quartz-bearing biotite plagioclase amphibolite, biotite hornblende plagiogneiss and biotite plagiogneiss, which appear in rhythm. On top is gray fine-grained biotite plagiogneiss gripping thin bedded magnetite biotite plagiogneiss. Fine-grained biotite amphibole schist interbedded with light-flesh-colored biotite felsic gneiss belong to the upper member of Dongwufenzi Formation, there is thin bedded tremolite marble on the top. Liushugou Formation is characterized by hornblende schist, two-mica schist, two mica quartz schist,garnet biotite schist and biotite schist. The original rock has two general features: the lower part is dominated by volcanic rock; the upper part is based on clastic sedimentary rocks and chemical sedimentary rock. Volcanic rock is rich in alkali obviously,and medium acidic volcanic is characterized by relative enrichment in Al and large ion lithophile elements (LILE) and light rare earth elements (LREE). It is low in Mg,Y and heavy rare earth elements (HREE). Its geochemical characteristics are similar to adakite,which is formed in tectonic environment of active continental margin. We sampled separately in felsic gneiss and biotite schist, which are interbedded in the upper part of Dongwufenzi Formation. According to the SHRIMP U-Pb isotopic dating, we got the diagenetic age (1980 ± 9Ma,1946 ± 16Ma) and the metamorphic age (1901 ± 15Ma, 1893 ±66Ma). In conclusion, Sertengshan Group deposited between 1.95 ~1.98Ga in the island-arc environment of an active continental margin,and brought about metamorphism with an orogenic movement in 1.9Ga. |
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来源
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岩石学报
,2016,32(9):2901-2911 【核心库】
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关键词
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色尔腾山岩群
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SHRIMP测年
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活动大陆边缘
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地址
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吉林大学地球科学学院, 长春, 130061
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0569 |
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学科
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地质学 |
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基金
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国家自然科学基金
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国土资源部中国地质调查局项目
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文献收藏号
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CSCD:5789788
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参考文献 共
44
共3页
|
|
1.
Black L P. TEMORA 1: A new zircon standard for Phanerozoic U-Pb geochronology.
Chemical Geology,2003,200(1/2):155-170
|
CSCD被引
492
次
|
|
|
|
|
2.
Boynton W V. Cosmochemistry of the rare earth elements: Meteorite studies.
Rare Earth Element Geochemistry,1984:63-114
|
CSCD被引
1333
次
|
|
|
|
|
3.
Cawood P A. Precambrian plate tectonics: Criteria and evidence.
GSA Today,2006,16(7):4-11
|
CSCD被引
21
次
|
|
|
|
|
4.
Chen Y P. Metamorphism and zircon U-Pb dating of garnet amphibolite in the Baoyintu Group, Inner Mongolia.
Science Bulletin,2015,60(19):1698-1707
|
CSCD被引
36
次
|
|
|
|
|
5.
Cumming G L. Ore lead isotope ratios in a continuously changing earth.
Earth and Planetary Science Letters,1975,28(2):155-171
|
CSCD被引
54
次
|
|
|
|
|
6.
Defant M J. Derivation of some modern arc magmas by melting of young subducted lithosphere.
Nature,1990,347(6294):662-665
|
CSCD被引
1425
次
|
|
|
|
|
7.
Gou L L. Petrological evidence for isobaric cooling of ultrahightemperature pelitic granulites from the Khondalite Belt, North China Craton.
Science Bulletin,2015,60(17):1535-1542
|
CSCD被引
7
次
|
|
|
|
|
8.
Liu X S. Two types of Precambrian high-grade metamorphism, Inner Mongolia, China.
Journal of Metamorphic Geology,1993,11(4):499-510
|
CSCD被引
29
次
|
|
|
|
|
9.
Ludwig K R. Squid 1.02: A User' s Manual.
Berkeley Geochronology Centre Special Publication, 2,2001:19
|
CSCD被引
1
次
|
|
|
|
|
10.
Ma X D. Re-Os isotopic constraint to the age of in komatiites in the Neoarchean Guyang greenstone belt, North China Craton.
Chinese Science Bulletin,2010,55(27):3197-3204
|
CSCD被引
3
次
|
|
|
|
|
11.
Nasdala L. Zircon M257: A homogeneous natural reference material for the ion microprobe U-Pb analysis of zircon.
Geostandards and Geoanalytical Research,2008,32(3):247-365
|
CSCD被引
316
次
|
|
|
|
|
12.
Peng P. Paleoproterozoic gabbronoritic and granitic magmatism in the northern margin of the North China craton: Evidence of crust-mantle interaction.
Precambrian Research,2010,183(3):635-659
|
CSCD被引
63
次
|
|
|
|
|
13.
Peng P. Halaqin volcano-sedimentary succession in the central-northern margin of the North China Craton: Products of Late Paleoproterozoic ridge subduction.
Precambrian Research,2011,187(1/2):165-180
|
CSCD被引
27
次
|
|
|
|
|
14.
Santosh M. Extreme crustal metamorphism during Columbia supercontinent assembly: Evidence from North China Craton.
Gondwana Research,2006,10(3/4):256-266
|
CSCD被引
64
次
|
|
|
|
|
15.
Santosh M. Discovery of sapphirine-bearing Mg-Al granulites in the North China Craton: Implications for Paleoproterozoic ultrahigh temperature metamorphism.
Gondwana Research,2007,11(3):263-285
|
CSCD被引
92
次
|
|
|
|
|
16.
Santosh M. Timing of Palaeoproterozoic ultrahigh-temperature metamorphism in the North China Craton: Evidence from SHRIMP U-Pb zircon geochronology.
Precambrian Research,2007,159(3/4):178-196
|
CSCD被引
101
次
|
|
|
|
|
17.
Santosh M. Assembling North China Craton within the Columbia supercontinent: The role of double-sided subduction.
Precambrian Research,2010,178(1/4):149-167
|
CSCD被引
94
次
|
|
|
|
|
18.
Santosh M. Origin of paired high pressure-ultrahigh-temperature orogens: A ridge subduction and slab window model.
Terra Nova,2010,22(1):35-42
|
CSCD被引
35
次
|
|
|
|
|
19.
Santosh M. Paleoproterozoic ultrahigh-temperature granulites in the North China Craton: Implications for tectonic models on extreme crustal metamorphism.
Precambrian Research,2012,222/223:77-106
|
CSCD被引
54
次
|
|
|
|
|
20.
Santosh M. Paleoproterozoic accretionary orogenesis in the North China Craton: A SHRIMP zircon study.
Precambrian Research,2013,227:29-54
|
CSCD被引
38
次
|
|
|
|
|
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