川东北元坝地区中生代构造与动态热演化史——磷灰石、锆石(U-Th)/He定年分析

王杰; 秦建中; 刘文汇; 陶成; 腾格尔

doi:10.11781/sysydz201201019

川东北元坝地区中生代构造与动态热演化史——磷灰石、锆石(U-Th)/He定年分析

doi: 10.11781/sysydz201201019

王杰^1,2,
秦建中^1,2,
刘文汇^1,2,
陶成^1,2,
腾格尔^1,2

1.
中国石油化工集团公司油气成藏重点实验室, 江苏, 无锡, 214151
2. 中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所, 江苏, 无锡, 214126

基金项目: 国家重点基础研究(973项目)(2005CB422102);国家重大专项(2008ZX05005-01-02)

详细信息

作者简介:
王杰(1975- ),男,博士,高级工程师,从事油气地质与有机地球化学研究工作.E-mail:wangjie.syky@sinopec.com.

中图分类号: P597.3
计量
- 文章访问数: 3595
- HTML全文浏览量: 59
- PDF下载量: 1779
- 被引次数: 0
出版历程
- 收稿日期: 2011-01-08
- 修回日期: 2011-12-29
- 刊出日期: 2012-01-28

Mesozoic tectonics and dynamic thermal history in Yuanba area of northeastern Sichuan Basin：application of（U-Th）/He dating of apatite and zircon

Wang Jie^1,2,
Qin Jianzhong^1,2,
Liu Wenhui^1,2,
Tao Cheng^1,2,
Tenger^1,2

1.
SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214151, China
2. Wuxi Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214151, China

摘要

摘要: 通过对川东北元坝地区须家河组(T₃x)—嘉定组(K₁j)钻井岩屑样品镜质体反射率和锆石、磷灰石(U-Th)/He定年分析,建立了该区He年龄—深度/温度动态演化模式,推断出元坝地区磷灰石He封闭温度为95℃左右。元坝地区T₃x-K₁j中生代地层基本都经历了磷灰石He封闭温度(95℃);所有样品未经历锆石He封闭温度,T₃x²-J₁z地层部分样品可能经历了约170℃的最高古地温。元坝地区中生代地层在古近纪—新近纪(0.2～36.4 Ma)发生重大冷却抬升剥蚀,剥蚀速率约为109.9m/Ma,K₁j及以上地层最大抬升剥蚀厚度约为4000m。系统揭示了该区动态热演化历史,中生代地层最高古地温接近于170～190℃,随后地层发生抬升,古地温下降;在36～176 Ma之间时,古地温在95～170℃之间;在0～36Ma时,现今地温小于95℃。
- 镜质体反射率 /
- 磷灰石和锆石U-Th/He定年 /
- 剥蚀厚度 /
- 热演化史 /
- 元坝地区 /
- 川东北
Abstract: In Yuanba area of the northeastern Sichuan Basin,vitrinite reflectance and(U-Th)/He dating analyses of apatite and zircon in chip samples from the Xujiahe(T₃x)-Jiading(K₁j) Formations were carried out.A dynamic evolution model based on He age and depth/temperature was set up,by means of which we concluded that the He closure temperature of apatite was about 95℃.Most of the Mesozoic strata(T₃x-K₁j) in the study area experienced the He closure temperature of apatite(95℃) while no sample experienced the He closure temperature of zircon,and some samples from T₃x²-J₁z underwent the maxium palaeogeothermal of about 170℃.From Paleogene to Neogene(0.2-36.4 Ma),the Mesozoic strata in Yuanba area went through a severe cooling uplift and denudation with the denudation rate of 109.9 m/Ma.In K₁j and the overlying strata,the maximum denudation thickness was about 4000 m.The dynamic thermal evolution history in the study area was illustrated systematically as followed.In Mesozoic,the maximum palaeogeothermal of strata was 170-190℃.As strata upraise,palaeogeothermal decreased.From 36 to 176 Ma,palaeogeothermal was 95-170℃.From 0 to 36 Ma,the present geotemperature is below 95℃.
- vitrinite reflectance /
- U-Th/He dating of apatite and zircon /
- denudation thickness /
- thermal evolution history /
- Yuanba area /
- northeastern Sihuan Basin

HTML全文

参考文献(25)

[1]	何丽娟.沉积盆地构造热演化模拟的研究进展[J].地球科学进展,2000,15(6):661-665.
[2]	Mckenzie D.Some remarks on the development of sedimentary basins[J].Earth and Planetary Science Letters,1978,40:25-32.
[3]	秦建中,饶丹,蒋宏.高演化海相碳酸盐岩层系古温标的直接指标:包裹体均一温度[J].石油实验地质,2008,30(5):494-498.
[4]	袁玉松,郑和荣,涂伟.沉积盆地剥蚀量恢复方法[J].石油实验地质,2008,30(6):636-642.
[5]	Qin Jianzhong,Wang Jie,Qiu Nansheng.Evidence of thermal evolution history of northeast Sichuan basin—(U-Th)/He low temperature thermochronometry of ppatite and zircon[J].Journal of China University of Geosciences,2008,19(6):591-601.
[6]	徐二社,邱楠生,秦建中,等.沉积盆地有机质自由基热演化特征及其作为古温标的探索[J].地质学报,2008,28(3):413-419.
[7]	任战利,刘丽,崔军平.盆地构造热演化史在油气成藏期次研究中的应用[J].石油与天然气地质,2008,29(4):502-506.
[8]	曹长群,尚庆华,方一亭.探讨笔石反射率对奥陶系、志留系烃源岩成熟度的指示作用[J].古生物学报,2000,39(1):151-156.
[9]	邱楠生,李慧莉,金之钧.碳酸盐岩层系热历史恢复的有机质自由基古温标研究[J].地质学报,2006,80(3):390-397.
[10]	何谋春,吕新彪,刘艳荣.激光拉曼光谱在油气勘探中的应用研究初探[J] 光谱学与光谱分析,2004,24(11):1363-1366.
[11]	Orchard M J A.Conodont based temporal and spatial framework for the Triassic of North America[J].AAPG Bulletin,2002,86(6):1156.
[12]	王飞宇,刘德汉.镜状体反射率可作为下古生界高过成熟烃源岩成熟度标尺[J].天然气工业,1996,16(4):14-19.
[13]	秦建中,王杰,邱楠生,等.反演南方海相层系热史动态演化的新温标:磷灰石、锆石(U-Th)/He年龄和封闭温度[J].石油与天然气地质,2010,31(3):277-287.
[14]	Evans N J,Wilson N S F,Cline J S,et al.Fluorite(U-Th)/He thermochronology:Constraints on the low temperature history of Yucca Mountain,Nevada[J].Applied Geochemistry,2005,20:1099-1105.
[15]	Wolf R A,Farley K A,Silver L A.Helium diffusion and low temperature thermochronometry of apatite[J].Geochimica et Cosmochimica Acta,1996,60(21):4231-4240.
[16]	Reiners P W,Farley K A,Hickes H J.Helium diffusion and(U-Th)/He thermochronometry of zircon:Initial results from Fish Canyon Tuff and Gold Butte[J].Tectonophysics,2002,349:247-308.
[17]	Reiners P W,Farley K A.Helium diffusion and(U-Th)/Hethermochronometry titanite[J].Geochimica et Cosmochimica Acts,1999,63(22):3845-3859.
[18]	Wolf R,Farley K A,Kass D.A sensitivity analysis of the apatite(U-Th)/He thermochronometer[J].Chemical Geology,1998,148(1-2):105-114.
[19]	郭正吾,邓康龄,韩永辉,等.四川盆地形成与演化[M].北京:地质出版社,1996:48-88.
[20]	韩永辉,吴春生.四川盆地地温梯度及几个深井的热流值[J].石油与天然气地质,1993,14(1):80-84.
[21]	王一刚,余晓锋,杨雨,等.流体包裹体在建立四川盆地古地温剖面研究中的应用[J].地球科学,1998,23(3):285-288.
[22]	卢庆治,胡圣标,郭彤楼,等.川东北地区异常高压形成的地温场背景[J].地球物理学报,2005,48(5):1110-1116.
[23]	沈传波,梅廉夫,郭彤楼.川东北地区中、新生代热历史的裂变径迹分析[J].天然气工业,2007,27(7):24-26.
[24]	Farley K A,Wolf R A,Silver L T.The effects of long alpha stopping distances on(U-Th)/He ages[J].Geochimica et Cosmochimica Acta,1996,60(21):4223-4229.
[25]	Gleadow A J W,Fitzgerald P G.Uplift history and structure of the Transantarctic mountains:New evidence from fission track dating of basement apatite in the dry valleys area,southern Victoria land[J].Earth and Planetary Science Letters,1987,82:1-14.