陕西铜川地区延长组长7油页岩无机地球化学特征及古环境恢复

乔世海; 李玉宏; 郭望; 张云鹏; 王勇

doi:10.11781/sysydz201901121

陕西铜川地区延长组长7油页岩无机地球化学特征及古环境恢复

doi: 10.11781/sysydz201901121

乔世海^1,2,3,
李玉宏^1,3, ,,
郭望³,
张云鹏³,
王勇⁴

1. 中国地质科学院, 北京 100037;
2. 中国地质大学(北京), 北京 100037;
3. 中国地质调查局西安地质调查中心, 西安 710054;
4. 山东鲁南瑞虹化工仪器有限公司, 山东滕州 277500

基金项目:

国家科技重大专项“西北地区中生界陆相典型页岩气赋存方式与富集规律研究”（2016ZX05034001-006）和陕西省自然科学基金“柴北缘侏罗纪盆地构造演化关键问题研究：以红山地区为例”（2018JM4031）资助。

详细信息

作者简介:
乔世海(1989-),男,硕士生,石油天然气地质专业。E-mail:qiaosh517@gmail.com。

通讯作者:
李玉宏(1968-),男,高级工程师,从事石油勘探开发研究。E-mail:L1763@tom.com。

中图分类号: TE121.3
计量
- 文章访问数: 917
- HTML全文浏览量: 72
- PDF下载量: 118
- 被引次数: 0
出版历程
- 收稿日期: 2018-09-20
- 修回日期: 2018-12-17
- 刊出日期: 2019-01-28

Inorganic geochemical characteristics and paleoenvironment of Chang 7 oil shale in Yanchang Formation, Tongchuan area, Shaanxi Province

QIAO Shihai^1,2,3,
LI Yuhong^{1,3
, ,},
GUO Wang³,
ZHANG Yunpeng³,
WANG Yong⁴

1. Chinese Academy of Geological Sciences, Beijing 100037, China;
2. China University of Geosciences(Beijing), Beijing 100037, China;
3. Xi'an Center of China Geological Survey, Xi'an, Shaanxi 710054, China;
4. Shandong Lunan Ruihong Chemical Co., Ltd., Tengzhou, Shandong 277500, China

摘要

摘要: 为研究陕西铜川地区三叠系延长组长7段油页岩沉积时水体的盐度、氧化还原条件、深度、湖底热液活动情况以及古气候等沉积古环境特征，对该区长7段油页岩岩心样品进行了地球化学特征分析。该区长7段油页岩Sr含量为198.28×10^-6，Sr/Ba均值为0.39，V/Ni值为4.50，Walker法计算"相当硼"含量大部分样品低于200×10^-6，最低值接近40×10^-6，表明长7油页岩形成于微咸-淡水、厌氧还原环境；钴元素定量计算显示其为最大水深40~70 m的深湖-半深湖相；Sr/Cu值平均为4.28，属温湿-半湿润气候条件；P、Cu、Co、Ni、V、Rb等元素富集，REE总量低、HREE富集、Ce表现为负异常，La/Yb-REE图解样品点大部分落在玄武岩、花岗岩和沉积岩的交会区内等，反映沉积时期湖底有热液沉积作用的存在。
- 无机地球化学 /
- 古环境 /
- 油页岩 /
- 延长组 /
- 三叠系 /
- 铜川地区 /
- 陕西
Abstract: The geochemistry of shale core samples from the 7th member (Chang 7) of Triassic Yanchang Formation were analyzed in order to study the characteristics of sedimentary palaeoenvironment such as salinity, redox condition, depth, hydrothermal activity and palaeoclimate when the Chang 7 member was deposited in the Tongchuan area, Shaanxi Province. The content of Sr is 198.28×10^-6, Sr/Ba is 0.39, V/Ni is 4.50, the equivalent boron content by the Walker method in most samples is less than 200×10^-6, and the lowest value is about 40×10^-6. Based on the above characteristics, it can be concluded that the Chang 7 oil shale was deposited in a brackish fresh water and anaerobic environment. The quantitative determination of cobalt indicated that the sedimentary environment was a lake with a maximum water depth of 40-70 m. The average Sr/Cu ratio is 4.28, which means that the paleoclimate was warm-wet and semi-humid. P, Cu, Co, Ni, V and Rb were enriched. The total REE was low, and the HREE was enriched. Ce showed a negative anomaly. Most of the La/Yb-REE plots were located near the intersection of basalt, granite and sedimentary rocks. All these characteristics strongly confirmed the existence of hydrothermal sedimentation in the lake.
- inorganic geochemistry /
- paleoenvironmental restoration /
- oil shale /
- Yanchang Formation /
- Triassic /
- Tongchuan area /
- Shaanxi Province

HTML全文

参考文献(26)

[1]	李玉宏,张文,武富礼,等.陕西省铜川-黄陵地区延长组长7油页岩特征及资源潜力[J].西安科技大学学报,2016,36(5):647-656. LI Yuhong,ZHANG Wen,WU Fuli,et al.Characteristics and resource potential of oil shale in Chang 7 of Yanchang Formation in Tongchuan-Huangling area,Shaanxi Province[J].Journal of Xi'an University of Science and Technology,2016,36(5):647-656.
[2]	李玉宏,李金超,姜亭,等.鄂尔多斯盆地何家坊地区三叠系油页岩特征[J].吉林大学学报(地球科学版),2009,39(1):65-71. LI Yuhong,LI Jinchao,JIANG Ting,et al.Characteristics of the Triassic oil shale in the Hejiafang area,Ordos Basin[J].Journal of Jilin University (Earth Science Edition),2009,39(1):65-71.
[3]	李玉宏,姜亭,武富礼,等,陕西铜川-延安地区油页岩及油气资源特征[J].中国地质调查,2016,3(1),20-25. LI Yuhong,JIANG Ting,WU Fuli,et al.Characteristics of oil shale and oil gas resources in the Tongchuan-Yan'an area,Shaanxi Province[J].Geological Survey of China,2016,3(1):20-25.
[4]	卢进才,李玉宏,魏仙样,等.鄂尔多斯盆地三叠系延长组长7油层组油页岩沉积环境与资源潜力研究[J].吉林大学学报(地球科学版),2006,36(6):928-932. LU Jincai,LI Yuhong,WEI Xianyang,et al.Research on the depositional environment and resources potential of the oil shale in the Chang 7 member,Triassic Yanchang Formation in the Ordos Basin[J].Journal of Jilin University (Earth Science Edition),2006,36(6):928-932.
[5]	庞军刚,李文厚,肖丽.陕北地区延长组坳陷湖盆浅湖与深湖亚相的识别特征[J].兰州大学学报(自然科学版),2009,45(6):36-40. PANG Jungang,LI Wenhou,XIAO Li.Identifying characteristics of shallow lake and deep lake of Yanchang Formation depressed type lacustrine basin in Shanbei area[J].Journal of Lanzhou University (Natural Sciences),2009,45(6):36-40.
[6]	郑荣才,柳梅青.鄂尔多斯盆地长6油层组古盐度研究[J].石油与天然气地质,1999,20(1):20-25. ZHENG Rongcai,LIU Meiqing.Study on palaeosalinity of Chang-6 oil reservoir set in Ordos Basin[J].Oil & Gas Geology,1999,20(1):20-25.
[7]	文华国,郑荣才,唐飞,等.鄂尔多斯盆地耿湾地区长6段古盐度恢复与古环境分析[J].矿物岩石,2008,28(1):114-120. WEN Huaguo,ZHENG Rongcai,TANG Fei,et al.Reconstruction and analysis of paleosalanity and paleoenvironment of the Chang 6 Member in the Gengwan region,Ordos Basin[J].Journal of Mineralogy and Petrology,2008,28(1):114-120.
[8]	李进龙,陈东敬.古盐度定量研究方法综述[J].油气地质与采收率,2003,10(5):1-3. LI Jinlong,CHEN Dongjing.Summary of quantified research method on paleosalinity[J].Petroleum Geology and Recovery Efficiency,2003,10(5):1-3.
[9]	李成凤,肖继风.用微量元素研究胜利油田东营盆地沙河街组的古盐度[J].沉积学报,1988,6(4):100-107. LI Chengfeng,XIAO Jifeng.The application of trace element to the study on paleosalinities in Shahejie Formation of Dongying Basin Shengli Oilfield[J].Acta Sedimentologica Sinica,1988,6(4):100-107.
[10]	王敏芳,焦养泉,王正海,等.沉积环境中古盐度的恢复:以吐哈盆地西南缘水西沟群泥岩为例[J].新疆石油地质,2005,26(6):719-722. WANG Minfang,JIAO Yangquan,WANG Zhenghai,et al.Recovery paleosalinity in sedimentary environment:an example of mudstone in Shuixigou Group,southwestern margin of Turpan-Hami Basin[J].Xinjiang Petroleum Geology,2005,26(6):719-722.
[11]	王益友,吴萍.江浙海岸带沉积物的地球化学标志[J].同济大学学报,1983(4):79-87. WANG Yiyou,WU Ping.Geochemical criteria of sediments in the coastal area of Jiangsu and Zhejiang provinces[J].Journal of Tongji University,1983(4):79-87.
[12]	李春荣,陈开远.潜江凹陷盐湖层序地层岩石地球化学古环境研究[J].海洋石油,2004,24(3):25-29. LI Chunrong,CHEN Kaiyuan.The research of ancient environment of rock geochemistry and sequence stratigraphy on saline lake,Qingjiang Depression[J].Offshore Oil,2004,24(3):25-29.
[13]	李广之,胡斌,邓天龙,等.微量元素V和Ni的油气地质意义[J].天然气地球科学,2008,19(1):13-17. LI Guangzhi,HU Bin,DENG Tianlong,et al.Petroleum geolo-gical significance of microelements V and Ni[J].Natural Gas Geoscience,2008,19(1):13-17.
[14]	陈建强,周洪瑞,王训练.沉积学及古地理学教程[M].北京:地质出版社,2004. CHEN Jianqiang,ZHOU Hongrui,WANG Xunlian.Sedimento-logy and sedimentary palaeogeography[M].Beijing:Geological Publishing House,2004.
[15]	NICHOLLS G D.Trace elements in sediments:an assessment of their possible utility as depth indicators[J].Marine Geology,1967,5(5/6):539-555.
[16]	吴智平,周瑶琪.一种计算沉积速率的新方法:宇宙尘埃特征元素法[J].沉积学报,2000,18(3):395-399. WU Zhiping,ZHOU Yaoqi.Using the characteristic elements from meteoritic must in strata to calculate sedimentation rate[J].Acta Sedimentologica Sinica,2000,18(3):395-399.
[17]	周洪瑞,王自强,崔新省,等.华北地台南部中新元古界层序地层研究[M].北京:地质出版社,1999. ZHOU Hongrui,WANG Ziqiang,CUI Xinsheng,et al.Study of the neoproterozoic strata on the southern of the North China Platform[M].Beijing:Geological Publishing House,1999.
[18]	王随继,黄杏珍,妥进才,等.泌阳凹陷核桃园组微量元素演化特征及其古气候意义[J].沉积学报,1997,15(1):65-70. WANG Suiji,HUANG Xingzhen,TUO Jincai,et al.Evolutional characteristics and their paleoclimate significance of trace elements in the Hetaoyuan Formation,Biyang Depression[J].Acta Sedimentologica Sinica,1997,15(1):65-70.
[19]	MARCHIG V,GUNDLACH H,MÖLLER P,et al.Some geochemical indicators for discrimination between diagenetic and hydrothermal metalliferous sediments[J].Marine Geology,1982,50(3):241-256.
[20]	葛朝华,韩发.广东大宝山矿床喷气:沉积成因地质地球化学特征[M].北京:北京科学技术出版社,1987. GE Chaofa,HAN Fa.Geochemical characteristics of jet-sedimentary deposition in the Dabaoshan Deposit,Guangdong[M].Beijing:Science and Technology Press,1987.
[21]	孙省利,高兆奎,魏晓辉,等.西成铅锌成矿带泥盆系硅质岩地质地球化学特征与热水沉积成矿[J].西北地质,2000,33(2):1-7. SUN Shengli,GAO Zhaokui,WEI Xiaohui,et al.Geological and geochemical characteristics of Devonian Chert from Xicheng Leadzinc ore belt and hot water sedimentary ore formation[J].Northwestern Geology,2000,33(2):1-7.
[22]	RONA P A,BOSTRÖM K,LAUBIER L,et al.Hydrothermal processes at seafloor spreading centers[M].Boston,MA:Springer,1983.
[23]	贾智彬,侯读杰,孙德强,等.热水沉积判别标志及与烃源岩的耦合关系[J].天然气地球科学,2016,27(6):1025-1034. JIA Zhibin,HOU Dujie,SUN Deqiang,et al.Hydrothermal sedimentary discrimination criteria and its coupling relationship with the source rocks[J].Natural Gas Geoscience,2016,27(6):1025-1034.
[24]	张位华,姜立君,高慧,等.贵州寒武系底部黑色硅质岩成因及沉积环境探讨[J].矿物岩石地球化学通报,2003,22(2):174-178. ZHANG Weihua,JIANG Lijun,GAO Hui,et al.Study on sedimentary environment and origin of black siliceous rocks of the Lower Cambrian in Guizhou Province[J].Bulletin of Minera-logy,Petrology and Geochemistry,2003,22(2):174-178.
[25]	张文正,杨华,解丽琴,等.湖底热水活动及其对优质烃源岩发育的影响:以鄂尔多斯盆地长7烃源岩为例[J].石油勘探与开发,2010,37(4):424-429. ZHANG Wenzheng,YANG Hua,XIE Liqin,et al.Lake-bottom hydrothermal activities and their influences on the high-quality source rock development:a case from Chang 7 source rocks in Ordos Basin[J].Petroleum Exploration and Development,2010,37(4):424-429.
[26]	赵文智,胡素云,汪泽成,等.鄂尔多斯盆地基底断裂在上三叠统延长组石油聚集中的控制作用[J].石油勘探与开发,2003,30(5):1-5. ZHAO Wenzhi,HU Suyun,WANG Zecheng,et al.Key role of basement fault control on oil accumulation of Yanchang Formation,Upper Triassic,Ordos Basin[J].Petroleum Exploration and Development,2003,30(5):1-5.