黔南马坡脚上二叠统吴家坪组凝灰岩成因及其地质意义
The Origin and Geologic Significance of the Tuff within the Upper Permian Wuchiaping Formation at Mapojiao in the Southern Guizhou,China
查看参考文献93篇
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文摘
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为确定贵州南部马坡脚上二叠统海相碳酸盐岩夹凝灰岩的形成年代、成因及其与峨眉山大火成岩省的关系,对其进行了全岩地球化学、锆石U-Pb年龄、锆石微量元素及Hf同位素分析。结果显示,马坡脚凝灰岩具有较高的Al_2O_3/TiO_2比值和显著的Eu负异常。2个样品的锆石U-Pb年龄分别为(259.1±1.5) Ma和(257.5±1.8) Ma,与云南宾川酸性熔结凝灰岩的年龄相近。马坡脚凝灰岩中锆石的ε_(Hf)(t)值为1.1~8.4,且Th/Nb比值较低,具有板内岩浆岩的地球化学性质。锆石年龄和地球化学特征指示马坡脚凝灰岩可能来自峨眉山大火成岩省的酸性火山活动。结合已发表的高精度CA-TIMS年龄与牙形石生物地层年龄,可以认为峨眉山酸性火山活动可能至少持续至晚二叠世吴家坪早期,且峨眉山酸性火山喷发可能是导致吴家坪期气候变冷的重要影响因素之一。 |
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其他语种文摘
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In order to explore the formation age and origin of the tuff within the upper Permian marine limestones at Mapojiao site in the southern Guizhou and its possible relationship with the Emeishan Large Igneous Province (LIP),a study on the bulk rock geochemistry,U-Pb dating,trace elements and Hf isotopic geochemistry of zircon grains of the tuff has been carried out in this paper.The results show that samples of the tuff at Mapojiao display relatively high Al_2O_3/TiO_2 ratios and obvious negative Eu anomalies.The U-Pb ages of zircon grains from two samples are (259.1±1.5) Ma and(257.5±1.8) Ma,respectively.They are similar to that of the felsic ignimbrite in the Binchuan area.The ε_(Hf)(t) values of zircons from the tuff samples vary from +1.1 to +8.4,and the Th/Nb ratios of those zircons are relatively low,indicating that they have geochemical characteristics of the intraplate magmatic rocks.The above U-Pb ages and geochemical characteristics of zircons imply that the tuff at Mapojiao could be sourced from the felsic volcanic activity related to the Emeishan LIP.Combined with the published ages of high-precision CA-TIMS zircon U-Pb dating and conodont biostratigraphy,it is believed that the Emeishan felsic volcanism could at least last to the Early Wuchiapingian epoch of the Late Permian.The Emeishan felsic volcanic eruption could be an important factor resulting in the climate cooling in the Wuchiapingian epoch. |
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来源
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矿物岩石地球化学通报
,2022,41(2):397-413 【核心库】
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DOI
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10.19658/j.issn.1007-2802.2022.41.009
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关键词
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凝灰岩
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地球化学
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锆石U-Pb年龄
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Hf同位素
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峨眉山大火成岩省
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气候变冷
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地址
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1.
成都理工大学沉积地质研究院, 成都, 610059
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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, 贵阳, 550081
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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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1007-2802 |
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学科
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地质学 |
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基金
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国家自然科学基金资助项目
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文献收藏号
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CSCD:7203045
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参考文献 共
93
共5页
|
|
1.
Ali J R. Emeishan Basalt Ar-Ar overprint ages define several tectonic events that affected the western Yangtze platform in the Mesozoic and Cenozoic.
Journal of Asian Earth Sciences,2004,23(2):163-178
|
CSCD被引
31
次
|
|
|
|
|
2.
Ali J R. Emeishan large igneous province, SW China.
Lithos,2005,79(3/4):475-489
|
CSCD被引
99
次
|
|
|
|
|
3.
Ali J R. Emeishan large igneous province (SW China) and the mantle-plume up-doming hypothesis.
Journal of the Geological Society,2010,167(5):953-959
|
CSCD被引
30
次
|
|
|
|
|
4.
Bagherpour B. Early Late Permian coupled carbon and strontium isotope chemostratigraphy from South China: Extended Emeishan volcanism?.
Gondwana Research,2018,58:58-70
|
CSCD被引
4
次
|
|
|
|
|
5.
Bagherpour B. Early Wuchiapingian (Lopingian, late Permian) drowning event in the South China block suggests a late eruptive phase of Emeishan large Igneous Province.
Global and Planetary Change,2018,169:119-132
|
CSCD被引
4
次
|
|
|
|
|
6.
Blichert-Toft J. The Lu-Hf isotope geochemistry of chondrites and the evolution of the mantle-crust system.
Earth and Planetary Science Letters,1997,148(1/2):243-258
|
CSCD被引
877
次
|
|
|
|
|
7.
Bond D P G. Large igneous provinces and mass extinctions: An update.
Volcanism, Impacts, and Mass Extinctions: Causes and Effects,2014:29-55
|
CSCD被引
1
次
|
|
|
|
|
8.
Bryan S E. Silicic volcanism: An undervalued component of large igneous provinces and volcanic rifted margins.
Volcanic Rifted Margins,2002:97-118
|
CSCD被引
2
次
|
|
|
|
|
9.
Chen B. Carbon and conodont apatite oxygen isotope records of Guadalupian-Lopingian boundary sections: Climatic or sea-level signal?.
Palaeogeography, Palaeoclimatology, Palaeoecology,2011,311(3/4):145-153
|
CSCD被引
18
次
|
|
|
|
|
10.
Chen B. Permian ice volume and palaeoclimate history: Oxygen isotope proxies revisited.
Gondwana Research,2013,24(1):77-89
|
CSCD被引
41
次
|
|
|
|
|
11.
Cheng L L. Origin of K-feldspar megacrysts in rhyolites from the Emeishan large igneous province, southwest China.
Lithos,2017,294/295:397-411
|
CSCD被引
3
次
|
|
|
|
|
12.
Dai S F. Origin of minerals and elements in the Late Permian coals, tonsteins, and host rocks of the Xinde Mine, Xuanwei, eastern Yunnan, China.
International Journal of Coal Geology,2014,121:53-78
|
CSCD被引
10
次
|
|
|
|
|
13.
Deng X S. Detrital record of late-stage silicic volcanism in the Emeishan large igneous province.
Gondwana Research,2020,79:197-208
|
CSCD被引
5
次
|
|
|
|
|
14.
Ernst R E. How Large Igneous Provinces affect global climate, sometimes cause mass extinctions, and represent natural markers in the geological record.
Palaeogeography, Palaeoclimatology, Palaeoecology,2017,478:30-52
|
CSCD被引
31
次
|
|
|
|
|
15.
Fedo C M. Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols, with implications for paleoweathering conditions and provenance.
Geology,1995,23(10):921-924
|
CSCD被引
374
次
|
|
|
|
|
16.
Fielding C R. Stratigraphic imprint of the Late Palaeozoic Ice Age in eastern Australia: A record of alternating glacial and nonglacial climate regime.
Journal of the Geological Society,2008,165(1):129-140
|
CSCD被引
36
次
|
|
|
|
|
17.
Fortes De Lena L O.
Establishing a robust timeframe for environmental change in the geological past through combined use of highprecision u-pb geochronology of zircon from volcanic ash layers and age-depth modelling. Doctoral Thesis,2019
|
CSCD被引
1
次
|
|
|
|
|
18.
Frank T D. Acme and demise of the late Palaeozoic ice age: A view from the southeastern margin of Gondwana.
Palaeogeography, Palaeoclimatology, Palaeoecology,2015,418:176-192
|
CSCD被引
11
次
|
|
|
|
|
19.
Griffin W L. The Hf isotope composition of cratonic mantle: LAM-MC-ICPMS analysis of zircon megacrysts in kimberlites.
Geochimica et Cosmochimica Acta,2000,64(1):133-147
|
CSCD被引
889
次
|
|
|
|
|
20.
Halpin J A. U-Pb zircon geochronology and geochemistry from NE Vietnam: A ' tectonically disputed' territory between the Indochina and South China blocks.
Gondwana Research,2016,34:254-273
|
CSCD被引
24
次
|
|
|
|
|
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