裂变径迹年龄多成分分离技术及其在沉积盆地物源分析中的应用
- 1. 同济大学海洋地质教育部重点实验室 上海 200092;
- 2. 江苏石油勘探局地质研究院 江苏扬州 225261
基金项目:
国家自然科学基金(批准号:49876013);教育部资助优秀年轻教师基金;高等学校骨干教师资助计划联合资助项目
作者简介:
周祖翼,男,1965年出生,教授,大陆边缘构造、盆地分析
- 收稿日期:
2000-07-12
- 修回日期:
2001-01-05
- 刊出日期:
2001-09-10
摘要: 在沉积岩样品的单颗粒裂变径迹年龄测试中,常常出现同一个样品的径迹年龄可能由多个不同年龄组分构成的情况。当样品的年龄未能通过 χ2检验时,就必须对样品的年龄进行进一步的多成分分析。本文介绍的最大似然估计方法就是一种有效的年龄成分分离技术。应用这一技术,我们对苏北盆地JSG井的 3个岩心样品 (JSG1、JSG2、JSG3)的 144个磷灰石单颗粒矿物年龄进行了多成分分离,表明上述三个样品实际上是由年龄值分别为 70Ma和 16 7Ma左右的两个成分组成的。这两组年龄的存在表明沉积时存在两个不同的物源区,两组径迹年龄反映的则是磷灰石碎屑颗粒在物源区最后一次达到完全退火温度 (大于 12 0°C)的时间。
Estimation of the Multi-component Fission Track Age Data and Its Application in the Provenace Study of Sedimentary Basins
- 1. MOE Laboratory of Marine Geology, Tongji University,Shanghai 200092;
- 2. Geology Reaserch Institute, Jiangsu Bureau of Petroleum Exploration, Yangzhou Jiangsu 225261
- Received Date:
2000-07-12
- Rev Recd Date:
2001-01-05
- Publish Date:
2001-09-10
Abstract: A common problem in single grain fission track analysis by the external method is the detection of component ages when a sample contains grain with several different true ages．Further analysis is required if the ages failed to pass the x2 test．This paper introduces the maximum likelihood method for the estimatida of proportions and agesd age components．The method is applied to three core samples from Subei basin．The 144 single grain ages from these samples failed to pass the x2 test and our analysis yields two true age components for these grains(70 Ma and 167 Ma)．This result shows that there exist two different provenances for the sedimemts from Subei basin,which is in Line with the previous sedimentological studies．
周祖翼, 毛凤鸣, 廖宗廷, 郭彤楼. 裂变径迹年龄多成分分离技术及其在沉积盆地物源分析中的应用[J]. 沉积学报, 2001, 19(3): 456-458,473.
| 引用本文: |
周祖翼, 毛凤鸣, 廖宗廷, 郭彤楼. 裂变径迹年龄多成分分离技术及其在沉积盆地物源分析中的应用[J]. 沉积学报, 2001, 19(3): 456-458,473.
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ZHOU Zu yi, MAO Feng ming, LIAO Zong ting, GUO Tong lou. Estimation of the Multi-component Fission Track Age Data and Its Application in the Provenace Study of Sedimentary Basins[J]. Acta Sedimentologica Sinica, 2001, 19(3): 456-458,473.
| Citation: |
ZHOU Zu yi, MAO Feng ming, LIAO Zong ting, GUO Tong lou. Estimation of the Multi-component Fission Track Age Data and Its Application in the Provenace Study of Sedimentary Basins[J]. Acta Sedimentologica Sinica, 2001, 19(3): 456-458,473.
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