扬子克拉通北缘神农架地区矿石山组Pb-Pb等时线年龄及其地质意义

卢山松; 邱啸飞; 谭娟娟; 吕红; 杨红梅; 王志先; 钟权

doi:10.3799/dqkx.2016.023

扬子克拉通北缘神农架地区矿石山组Pb-Pb等时线年龄及其地质意义

doi: 10.3799/dqkx.2016.023

卢山松^1,2,,
邱啸飞^1,2,
谭娟娟^1,2,
吕红^1,2,
杨红梅^1,2,
王志先³,
钟权³

1.
中国地质调查局武汉地质调查中心，湖北武汉 430205
2.
中国地质调查局花岗岩成岩成矿地质研究中心，湖北武汉 430205
3.
湖北省神农架国家地质公园管理局，湖北木鱼坪 442421

基金项目:

中国地质调查局项目 1212011121102

中国地质调查局项目 Nos.12120114005701

国家自然科学基金青年基金 No.41303026

详细信息

作者简介:
卢山松(1986-)，男，助理研究员，硕士，主要从事同位素地球化学和岩石地球化学研究. E-mail: luyin_student@163.com

中图分类号: P581
计量
- 文章访问数: 3634
- HTML全文浏览量: 1437
- PDF下载量: 31
- 被引次数: 0
出版历程
- 收稿日期: 2015-08-05
- 刊出日期: 2016-02-15

The Pb-Pb Isochron Age of the Kuangshishan Formation in Shennongjia Area on the Northern Margin of the Yangtze Craton and Its Geological Implications

1.
Wuhan Center of Geological Survey, China Geological Survey, Wuhan 430205, China
2.
Research Center of Granitic Diagenesis and Mineralization, China Geological Survey, Wuhan 430205, China
3.
Hubei Shennongjia National Geopark Administrative Bureau, Muyuping 442421, China

摘要

摘要: 扬子克拉通北缘神农架地区出露了大量中元古代碳酸盐岩地层，但已有的同位素年代学资料有限，故对神农架群矿石山组白云岩开展了全岩Pb-Pb等时线测年.研究结果表明，矿石山组白云岩²⁰⁶Pb/²⁰⁴Pb变化范围相对较大，为18.753~23.106，而²⁰⁷Pb/²⁰⁴Pb和²⁰⁸Pb/²⁰⁴Pb则变化范围相对较小，分别为15.606~16.046和37.793~38.599.八件白云岩样品²⁰⁶Pb/²⁰⁴Pb和²⁰⁷Pb/²⁰⁴Pb之间呈良好的线性关系，构成Pb-Pb等时线年龄为1632±75Ma(MSWD=8.7)，代表了矿石山组地层主体沉积时代，与已有的年代学结果可对应，表明Pb-Pb同位素体系可对古老的碳酸盐岩地层进行较为精确地定年.结合前人对于神农架群的年代学资料，确定神农架群的沉积时限应为1600~1100Ma的中元古代.
- 神农架群 /
- 矿石山组 /
- Pb-Pb等时线 /
- 中元古代 /
- 碳酸盐岩 /
- 岩石学
Abstract: The Shennongjia Group, located on the northern margin of the Yangtze Craton, shows a series of well-preserved succession of the Mesoproterozoic carbonate strata. However, geochronological data collected from this area are limited. In this study, we report a Pb-Pb isochron age for the Kuangshishan Formation of the Shennongjia Group. The ²⁰⁶Pb/²⁰⁴Pb ratios of the dolostone of the Kuangshishan Formation show wide variations from 18.753 to 23.106. On the contrary, the ²⁰⁷Pb/²⁰⁴Pb ratios and the ²⁰⁸Pb/²⁰⁴Pb ratios have a limited range from 15.606 to 16.046 and 37.793 to 38.599, respectively. 8 dolostone samples data show an obvious linear relationship between ²⁰⁶Pb/²⁰⁴Pb and ²⁰⁷Pb/²⁰⁴Pb, yielding a Pb-Pb isochron age of 1632±75Ma (MSWD=8.7) which represent the depositional age for the Kuangshishan Formation. This age accords well with previous published data, indicating that a precise stratigraphic age of the ancient carbonate strata can be obtained through Pb-Pb dating technique. Combined with previous researches, we suggest that the age span of the Shennongjia Group is 1600 to 1100Ma of Mesoproterozoic.
- Shennongjia Group /
- Kuangshishan Formation /
- Pb-Pb isochron /
- Mesoproterozoic /
- carbonate /
- petrology

HTML全文

图 1 神农架地区地质简图

据Qiu et al.(2011) 修改

Fig. 1. Geological sketch of Shennongjia region

下载: 全尺寸图片幻灯片

图 2 神农架地区中元古代地层柱状图及采样点位

1.砾岩；2.砂砾岩；3.砂岩；4.粉砂岩；5.页岩/板岩；6.燧石；7.石灰岩；8.白云岩；9.角砾状白云岩；10.硅质条带白云岩；11.叠层石白云岩；12.火山岩；13.凝灰岩；14.整合接触关系；15.平行不整合接触关系；16.采样点；据李怀坤等(2013) 修改

Fig. 2. Mesoproterozoic stratigraphic histogram of the Shennongjia area and the sampling locations of the Kuangshishan Formation

下载: 全尺寸图片幻灯片

图 3 神农架群矿石山组Pb-Pb等时线

Fig. 3. Pb-Pb isochron of carbonate rocks from the Kuangshishan Formation, Shennongjia Group

下载: 全尺寸图片幻灯片

表 1 神农架群矿石山组Pb同位素组成

Table 1. Pb isotope compositions of carbonate rocks from the Kuangshishan Formation, Shennongjia Group

序号	样号	岩性	²⁰⁶Pb/²⁰⁴Pb	2δ	²⁰⁷Pb/²⁰⁴Pb	2δ	²⁰⁸Pb/²⁰⁴Pb	2δ
1	12SNJ-72	块状白云岩	19.038	0.005	15.641	0.004	38.135	0.006
2	12SNJ-73	含黑色叠层石白云岩	19.774	0.005	15.707	0.004	37.897	0.008
3	12SNJ-75	块状白云岩	18.753	0.002	15.606	0.002	37.793	0.004
4	12SNJ-76	块状白云岩	20.322	0.007	15.740	0.006	38.341	0.009
5	12SNJ-77	含黑色叠层石白云岩	18.433	0.004	15.625	0.004	38.241	0.010
6	12SNJ-78	泥质条带白云岩	23.106	0.003	16.046	0.002	38.100	0.005
7	12SNJ-81	泥质条带白云岩	19.621	0.005	15.711	0.004	38.016	0.007
8	12SNJ-83	含叠层石白云岩	19.786	0.006	15.719	0.008	38.599	0.003
9	12SNJ-84	块状白云岩	21.076	0.005	15.830	0.004	38.114	0.001

下载: 导出CSV

参考文献(46)

Abati, J., Aghzer, A.M., Gerdes, A., et al., 2010.Detrital Zircon Ages of Neoproterozoic Sequences of the Moroccan Anti-Atlas Belt.Precambrian Research, 181(1-4):115-128.doi: 10.1016/j.precamres.2010.05.018
Chang, X.Y., Chen, L.Z., Hu, S.X., et al., 2004.Pb-Pb Isotope Dating of the Chengjiang Fauna-Bearing Beds.Acta Geoscientica Sinica, 25(2):181-184(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-GSWX198703000.htm
Chen, J.H., Edwards, R.L., Wasserburg, G.J., 1986.²³⁸U, ²³⁴U and ²³²Th in Seawater.Earth and Planetary Science Letters, 80(3-4): 241-251.doi: 10.1016/0012-821X(86)90108-1
Chen, D.F., Dong, W.Q., Zhu, B.Q., et al., 2004.Pb-Pb Ages of Neoproterozoic Doushantuo Phosphorites in South China: Constraints on Early Metazoan Evolution and Glaciation Events.Precambrian Research, 132(1-2):123-132.doi: 10.1016/j.precamres.2004.02.005
Chen, Y.Q., Jiang, S.Y., Ling, H.F., et al., 2009.Pb-Pb Dating of Black Shales from the Lower Cambrian and Neoproterozoic Strata, South China.Chemie der Erde, 69(2):183-189.doi: 10.1016/j.chemer.2008.12.005
Deng, Q., Wang, J., Wang, Z.J., et al., 2013.New Evidence for the Age of the Macaoyuan Group on the Northern Margin of the Yangtze Block, South China—Implications for Stratigraphic Correlation and Palaeogeographic Framework.Geological Bulletin of China, 32(4):631-638(in Chinese with English abstract). https://www.researchgate.net/profile/Zhengjiang_Wang/publications
Fölling, P.G., Zartman, R.E., Frimmel, H.E., 2000.A Novel Approach to Double-Spike Pb-Pb Dating of Carbonate Rocks: Examples from Neoproterozoic Sequences in Southern Africa.Chemical Geology, 171(1-2):97-122.doi: 10.1016/S0009-2541(00)00204-7
Gao, F.H., Yang, Y., Wang, F., et al., 2014.Determination of the Early Paleozoic Strata in Eastern Heilongjiang Province: Evidence from Field Geology and Detrital Zircon U-Pb Geochronology.Earth Science, 39(5):499-508(in Chinese with English abstract). https://www.researchgate.net/publication/287618885_Determination_of_the_early_Paleozoic_strata_in_eastern_Heilongjiang_Province_Evidence_from_field_geology_and_detrital_zircon_U-Pb_geochronology
Gao, M., Qiao, X.F., Liu, D.Y., et al., 1995.Direct Determination of the Pb-Pb Age of Carbonate Rocks of the Sailinhudong Formation of Inner Mongolia.Regional Geology of China, 4:348-352(in Chinese with English abstract). https://www.researchgate.net/publication/232748704_PbPb_dating_of_young_marbles_from_Taiwan
Gao, M., Liu, D.Y., Li, Y.A., 1996.Direct Dating of Carboniferous Coral Fossils from Carbonate Using Pb-Pb Isotopic Method.Geological Review, 42(1):22-29 (in Chinese with English abstract). https://www.researchgate.net/publication/222193598_The_challenge_of_direct_dating_old_human_fossils
Gopalan, K., Kumar, A., Kumar, S., et al., 2013.Depositional History of the Upper Vindhyan Succession, Central India: Time Constraints from Pb-Pb Isochron Ages of Its Carbonate Components.Precambrian Research, 233:108-117.doi: 10.1016/j.precamres.2013.04.014
Kuznetsov, A.B., Ovchinnikova, G.V., Gorokhov, I.M., et al., 2013.Age Constraints on the Neoproterozoic Baikal Group from Combined Sr Isotopes and Pb-Pb Dating of Carbonates from the Baikal Type Section, Southeastern Siberia.Journal of Asian Earth Sciences, 62:51-66.doi: 10.1016/j.jseaes.2011.06.003
Li, H.K., Lu, S.N., Xiang, Z.Q., et al., 2007.SHRIMP U-Pb Geochronological Research on Detrital Zircons from Complex-Group in the Western Segment of the North Qilian Mountains, Northwest China.Geological Review, 53(1):133-140(in Chinese with English abstract). https://www.researchgate.net/publication/285751583_SHRIMP_U-Pb_geochronological_research_on_detrital_zircons_from_the_Beidahe_Complex_Group_in_the_western_segment_of_the_North_Qilian_Mountains_Northwest_China
Li, H.K., Zhang, C.L., Xiang, Z.Q., et al., 2013.Zircon and Baddeleyite U-Pb Geochronology of the Shennongjia Group in the Yangtze Craton and Its Tectonic Significance.Acta Petrologica Sinica, 29(2) :673-697 (in Chinese with English abstract). https://www.researchgate.net/publication/286123963_Zircon_and_baddeleyite_U-Pb_geochronology_of_the_Shennongjia_Group_in_the_Yangtze_Craton_and_its_tectonic_significance
Li, H.Y., Xu, Y.G., Huang, X.L., et al., 2009.Activation of Northern Margin of the North China Craton in Late Paleozoic:Evidence from U-Pb Dating and Hf Isotopes of Detrital Zircons from the Upper Carboniferous Taiyuan Formation in the Ningwu-Jingle Basin.Chinese Science Bulletin, 54(4):677-686.(in Chinese with English abstract). doi: 10.1007/s11434-008-0444-9
Li, Q., Leng, J., 1987.The Upper Precambrian in the Shennongjia Region.Tianjin Science and Technology Press, Tianjin (in Chinese).
Liu, C.X., Mao, X.W., Wei, Y.X., et al., 2004.A Preliminary Reseaech on Stratigraphic Sequence of Shengnong Group.Resources Environment & Engineering, 18(Suppl.):5-16 (in Chinese with English abstract). https://www.researchgate.net/publication/284964870_A_preliminary_research_on_stratigraphic_sequence_of_Shennongjia_Group
Liu, X.M., Ling, W.L., Gao, S., 2010.Proterozoic Crustal Evolution of Yangtze Craton Revealed by Detrital Zircons from Shennongjia Area, South China.In: 19th V.M.Goldschmidt Conference, Knoxville (United States).Geochimica et Cosmochimica Acta, 74(12):A621. doi: 10.1007/978-94-007-4444-8_4
Moorbath, S., Taylor, P.N., Orpen, J.L., et al., 1987.First Direct Radiometric Dating of Archaean Stromatolitic Limestone.Nature, 326:865-867.doi: 10.1038/326865a0
Qiao, X.F., Gao, M., 1997.Carbonate Pb-Pb Isotopic Dating of Qingbaikouan System in Northern China and Its Significance.Earth Science, 22(1):1-7(in Chinese with English abstract).
Qiu, X.F., Ling, W.L., Liu, X.M., et al., 2011.Recognition of Grenvillian Volcanic Suite in the Shennongjia Region and Its Tectonic Significance for the South China Craton.Precambrian Research, 191(3-4):101-119.doi: 10.1016/j.precamres.2011.09.011
Toulkeridis, T., Goldstein, S.L., Clauer, N., et al., 1998.Sm-Nd, Rb-Sr and Pb-Pb Dating of Silicic Carbonates from the Early Archaean Barberton Greenstone Belt, South Africa:Evidence for Post-Depositional Isotopic Resetting at Low Temperature.Precambrian Research, 92(2):129-144.doi: 10.1016/S0301-9268(98)00071-0
Tucker, R.T., Roberts, E.M., Hu, Y., et al., 2013.Detrital Zircon Age Constraints for the Winton Formation, Queensland:Contextualizing Australias Late Cretaceous Dinosaur Faunas.Gondwana Research, 24(2):767-779.doi: 10.1016/j.gr.2012.12.009
Wan, Y.S., Miao, P.S., Liu, D.Y., et al., 2010.Formation Ages and Source Regins of the Palaeoproterozoic Gaofan, Hutuo and Dongjiao Groups in the Wutai and Dongjiao Areas of the North China Craton from SHRIMP U-Pb Dating of Detrital Zircons:Resolution of Debates over Their Stratigraphic Relationships.Chinese Science Bulletin, 55(7):572-578(in Chinese with English abstract). doi: 10.1007/s11434-009-0615-3
Wang, J., Deng, Q., Wang, Z.J., et al., 2013.New Evidences for Sedimentary Attributes and Timing of the "Macaoyuan Conglomerates" on the Northern Margin of the Yangtze Block in Southern China.Precambrian Research, 235:58-70.doi: 10.1016/j.precamres.2013.06.003
Westerhold, T., Rhl, U., Raffi, I., et al., 2008.Astronomical Calibration of the Paleocene Time.Palaeogeography, Palaeoclimatology, Palaeoecology, 257(4):377-403.doi: 10.1016/j.palaeo.2007.09.016
Xiao, Z.B., 2012.Research of the Detrital Zircon from Mesoproterozoic Sedimentary Strata in the North Margin of Yangtze Craton, China(Dissertation).Northwest University, Xian, 28-39(in Chinese with English abstract). doi: 10.1007/s12583-017-0723-y
Yang, E.L., Lü, X.B., Shi, P., et al., 2014.Detrital Zircon Age of Stratigraphic Sinian-Cambrian in East Guizhouand Its Geological Significance.Earth Science, 39(4):387-398(in Chinese with English abstract). https://www.researchgate.net/publication/285996187_Detrital_zircon_age_of_stratigraphic_Sinian-Cambrian_in_East_Guizhou_and_its_geological_significance
Zhang, Q.D., Song, T.R., He, Z.J., et al., 2002.Pb-Pb Age Determination of Meso-to Neoproterozoic Carbonates in the Ming Tombs District, Beijing.Geological Review, 48(4):416-423(in Chinese with English abstract). https://www.researchgate.net/publication/264658746_The_Mesoproterozoic_%27seismite%27_at_Laiyuan_Hebei_Province_E_China_re-interpreted
Zhou, H.W., Li, X.H., Liu, Y., et al., 1998.Pb-Pb Dating of Marbles from Longxiu Area within Yunkai Complex and Its Geological Implication.Geoscience, 12(2):180-184(in Chinese with English abstract). https://www.researchgate.net/publication/240403528_Early_Permian_peak_metamorphism_recorded_in_U-Pb_system_of_black_slates_from_the_Ogcheon_metamorphic_belt_South_Korea_and_its_tectonic_implication
常向阳, 陈良忠, 胡世学, 等, 2004.含澄江动物群地层的Pb-Pb同位素定年.地球学报, 25(2):181-184. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXB200402015.htm
邓奇, 王剑, 汪正江, 等, 2013.扬子北缘元古宇马槽园群时代归属新证据——对地层对比和古地理格局的启示.地质通报, 32(4):631-638. http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD201304012.htm
高福红, 杨扬, 王枫, 等, 2014.黑龙江省东部早古生代地层的确定:地质与碎屑锆石U-Pb年代学证据.地球科学, 39(5):499-508. http://www.earth-science.net/WebPage/Article.aspx?id=2859
高劢, 刘敦一, 李永安, 1996.用Pb-Pb同位素方法直接测定石炭系碳酸盐岩珊瑚化石年龄.地质论评, 42(1):22-29. http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP199601003.htm
高劢, 乔秀夫, 刘敦一, 等, 1995.直接测定内蒙古腮林忽洞组碳酸盐岩Pb-Pb同位素年龄.中国区域地质, 4:348-352. http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD504.010.htm
李怀坤, 陆松年, 相振群, 等, 2007.北祁连山西段北大河岩群碎屑锆石SHRIMP U-Pb年代学研究.地质论评, 53(1):133-140. http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP200701018.htm
李怀坤, 张传林, 相振群, 等, 2013.扬子克拉通神农架群锆石和斜锆石U-Pb年代学及其构造意义.岩石学报, 29(2):673-697. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201302023.htm
李洪颜, 徐义刚, 黄小龙, 等, 2009.华北克拉通北缘晚古生代活化:山西宁武-静乐盆地上石炭统太原组碎屑锆石U-Pb测年及Hf同位素证据.科学通报, 54(5):632-640. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB200905017.htm
李铨, 冷坚, 1987.前寒武纪地质研究:神农架上前寒武系.天津:天津科学技术出版社.
刘成新, 毛新武, 魏运许, 等, 2004.神农架群地层层序初探.资源环境与工程, 18(增刊):5-16. http://cpfd.cnki.com.cn/Article/CPFDTOTAL-ZGDJ200400005001.htm
乔秀夫, 高劢, 1997.中国北方青白口系碳酸盐岩Pb-Pb同位素测年及意义.地球科学, 22(1):1-7 doi: 10.11764/j.issn.1672-1926.1997.01.1
万渝生, 苗培森, 刘敦一, 等, 2010.华北克拉通高凡群、滹沱群和东焦群的形成时代和物质来源:碎屑锆石SHRIMP U-Pb同位素年代学制约.科学通报, 55(7):572-578. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB201007007.htm
肖志斌, 2012.中元古代扬子北缘神农架地区沉积岩碎屑锆石研究(硕士学位论文).西安:西北大学, 28-39.
杨恩林, 吕新彪, 石平, 等, 2014.黔东震旦-寒武系转换期碎屑锆石年龄及其地质意义.地球科学, 39(4):387-398 http://www.earth-science.net/WebPage/Article.aspx?id=2848
张巧大, 宋天锐, 和政军, 等, 2002.北京十三陵地区中-新元古界碳酸盐岩Pb-Pb年龄研究.地质论评, 48(4):416-423. http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP200204012.htm
周汉文, 李献华, 刘颖, 等, 1998.粤西龙修地区大理岩的Pb-Pb年龄及其地质意义.现代地质, 12(2):180-184. http://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ802.004.htm