Geochemical characteristics and their implications of Upper Triassic Baiguowan Formation in Xichang Basin, Sichuan Province
-
摘要: 对四川省西昌盆地上三叠统白果湾组碎屑岩的主量元素、微量元素、稀土元素进行综合研究,得出其主量元素具有富SiO2、CaO、P2O5,贫Al2O3、TFe2O3、MgO、Na2O、K2O的特征; 微量元素具有富Zr、Cs、Th、U等特征; 稀土元素总量相对较高,轻重稀土元素分馏明显,轻稀土较重稀土相对富集,具有中等负铕异常。白果湾组物源区为长英质岩区,属于被动大陆边缘区; 白果湾期的气候经历了湿润→干旱→湿润→干旱的变化过程; 成分成熟度总体偏低,呈现高→低→高→低的变化规律,与CIA变化趋势呈负相关。本次研究为该区晚三叠世环境演化研究提供了基础资料。Abstract: Through the comprehensive research on major elements, trace elements and rare earth elements of the clastic rocks in Upper Triassic Baiguowan Formation of Xichang Basin Sichuan Province, this research found that the major elements are rich in SiO2, CaO and P2O5 , and lack of Al2O3, TFe2O3, MgO, Na2O and K2O. The trace elements are rich in Zr, Cs, Th and U. The capacity of rare earth elements are relatively higher. The fractionation of light and heavy rare earth elements is obvious. The light rare earth elements is richer than the heavy ones, and have medium negative europium anomaly. The provenance of Baiguowan Formation in Xichang Basin is felsic rocks and passive continental margin area. The climate period experienced the process from humid to arid and to humid and arid again. Compositional maturity of Baiguowan Formation rocks is generally low, and shows the variation from high to low, and to high and low again. The variation is negatively correlated with chemical alteration index(CIA). This paper provides basic data for the study of environmental evolution of Late Triassic.
-
Keywords:
- Xichang Basin /
- Upper Triassic /
- Baiguowan Formation /
- geochemistry /
- tectonic setting /
- paleoweathering
-
-
[1] Cullers R L,Basu A,Suttner L J.Geochemical signature of provenance in sand-size material in soils and stream sediments near the Tobacco Root batholith,Montana,U.S.A.[J].Chem Geol,1988,70(4):335-348. [2] Bhatia M R,Crook K A.Trace element characteristics of graywackes and tectonic setting discrimination of sedimentary basins[J].Contribut Mineral Petrol,1986,92(2):181-193. [3] Taylor S R,McLennan S M.The Continental Crust:Its Composition and Evolution[M].Oxford:Blackwell Scientific Publications,1985. [4] Mclennan S M,Hemming S,Mcdaniel D K,et al.Geochemical approaches to sedimentation,provenance,and tectonics[J].Spec Pap Geol Soc Am,1993,284:21-40. [5] 白宪洲,何明友,王玉婷,等.四川若尔盖地区西康群地球化学特征及其物源区和古风化程度分析[J].现代地质,2010,24(1):151-157. [6] Mclennan S M.Rare earth elements in sedimentary rocks:influence of provenance and sedimentary processes[J].Rev Mineral Geochem,1989,21(8):169-200. [7] Condie K C.Chemical composition and evolution of the upper continental crust:Contrasting results from surface samples and shales[J].Chem Geol,1993,104(1/4):1-37. [8] 唐勇,覃建雄.四川西昌盆地三叠系沉积环境分析[J].四川地质学报,2007,27(2):92-95. [9] 覃建雄,张长俊,徐国盛.西昌盆地上三叠统白果湾组砂岩储层次生孔隙成因探讨[J].中国海上油气:地质,1996(2):83-89. [10] 文龙,项茜,刘埃平,等.西昌盆地上三叠统白果湾组古油藏痕迹研究[J].天然气勘探与开发,2008,31(3):6-9. [11] 王运生,李云岗.西昌盆地的形成与演化[J].成都理工学院学报,1996(1):85-90. [12] Wronkiewicz D J,Condie K C.Geochemistry of Archean shales from the Witwatersrand Supergroup,South Africa:Source-area weathering and provenance[J].Geochim Cosmochim Acta,1987,51(9):2401-2416. [13] Cox R,Lowe D R,Cullers R L.The influence of sediment recycling and basement composition on evolution of mudrock chemistry in the southwestern United States[J].Geochim Cosmochim Acta,1995,59(14):2919-2940. [14] Girty G H,Ridge D L,Knaack C,et al.Provenance and depositional setting of Paleozoic chert and argillite,Sierra Nevada,California[J].J Sediment Res,1996,66(1):107-118. [15] 李志红,罗照华,陈岳龙,等.康定—泸定地区变质侵入岩的地质地球化学特征及其构造环境[J].现代地质,2008,22(2):181-189. [16] 覃小锋,夏斌,黎春泉,等.阿尔金构造带西段前寒武纪花岗质片麻岩的地球化学特征及其构造背景[J].现代地质,2008,22(1):34-44. [17] Bhatia M R.Plate Tectonics and Geochemical Composition of Sandstones[J].J Geol,1983,91(6):611-626. [18] Bhatia M R,Taylor S R.Trace-element geochemistry and sedimentary provinces:A study from the Tasman Geosyncline,Australia[J].Chem Geol,1981,33(1-4):115-125. [19] 胡健民,孟庆任,石玉若,等.松潘-甘孜地体内花岗岩锆石SHRIMP U-Pb定年及其构造意义[J].岩石学报,2005,21(3):867-880. [20] Nesbitt H W,Young G M.Early proterozoic climates and plate motions inferred from major element chemistry of lutites[J].Nature,1982,299(5885):715-717. [21] 顾雪祥,刘建明,Schulz O,等.扬子地块南缘元古代浊积岩源区风化特征和源岩性质的沉积地球化学记录[J].成都理工大学学报:自然科学版,2003,30(3):221-235. [22] 武昱东,王宗起,罗金海,等.川西南甘洛地区中—新生代构造沉降史分析及对铅锌保存的约束[J].地质学报,2015,89(8):1471-1483. [23] 程立雪.川东北晚三叠世—侏罗纪盆缘造山隆升作用的沉积响应[D].成都:成都理工大学,2014. -
期刊类型引用(11)
1. 李静超，周晓成，何苗，颜玉聪，天娇，董金元. 四川红莫温泉的水文地球化学特征及其与地震的关系. 地震. 2024(03): 108-123 . 
百度学术
2. 何磊，牟必鑫，杨平，陈杨，刘治成. 康滇隆起东缘上三叠统页岩气有利区优选. 西南石油大学学报(自然科学版). 2023(05): 43-56 . 百度学术
3. 罗乃菲，杨知敏，李彦慧，王继盛，冯磊. 西昌盆地中部上三叠统白果湾组页岩地球化学特征及评价. 石化技术. 2022(06): 132-135+56 . 百度学术
4. 郑小敏，宋云，陈斌，杨林. 四川省乌蒙山片区白果湾组页岩气地质条件研究. 煤炭技术. 2022(09): 87-90 . 百度学术
5. 黄毅，戚明辉，牟必鑫，曹茜，刘虎，郑见超. 西昌盆地B1井龙马溪组页岩储集空间发育特征及影响因素. 天然气地球科学. 2022(10): 1691-1701 . 百度学术
6. 冯梦媛，叶玥豪，孙玮，宋金明，丁一，谢国梁，邵红君. 西昌盆地下古生界筇竹寺组与龙马溪组烃源岩特征. 断块油气田. 2021(01): 72-77 . 百度学术
7. 白宪洲，王玉婷，文龙，尹建华. 四川省石棉县孟获城新近系-第四系昔格达组孢粉组合特征. 四川地质学报. 2021(04): 536-543 . 百度学术
8. 杨威，魏国齐，金惠，郝翠果，沈珏红，王小丹. 西昌盆地上三叠统白果湾组沉积相与油气勘探前景. 天然气工业. 2020(03): 13-22 . 百度学术
9. 徐刚，王越，刘子畅，吕行，高淑芳. 四川盆地北部早白垩世剑门关组泥质岩地球化学特征及其地质意义. 中国地质调查. 2019(02): 76-86 . 本站查看
10. 白宪洲，文龙，王玉婷，马继跃，巴金，鄢圣武. 四川盆地西南缘下三叠统铜街子组-雷口坡组地球化学特征及其古环境意义. 四川地质学报. 2019(03): 387-393 . 百度学术
11. 吴家富，王翔，黄俊. 内蒙古丰镇市油篓山一带侏罗纪岩体的岩石学及地球化学特征. 中国地质调查. 2017(04): 41-49 . 本站查看
其他类型引用(4)
计量
- 文章访问数: 395
- HTML全文浏览量: 0
- PDF下载量: 249
- 被引次数: 15
下载:
