| 东营凹陷沙四段上部泥质烃源岩元素地球化学及其古盐度的空间差异性 |
| |
| 引用本文： | 钱焕菊,陆现彩,张雪芬,张林晔,刘 庆.东营凹陷沙四段上部泥质烃源岩元素地球化学及其古盐度的空间差异性[J].岩石矿物学杂志,2009,28(2):161-168. |
| |
| 作者姓名： | 钱焕菊 陆现彩 张雪芬 张林晔 刘 庆 |
| |
| 作者单位： | 1. 南京大学,地球科学与工程学院,江苏,南京,210093
2. 胜利油田,地质科学研究院,山东,东营,257015 |
| |
| 摘 要： | 东营凹陷第三系沙河街组四段上部为一套优质烃源岩系.通过分析烃源岩系典型元素和元素比值的变化特点,对沙四段上部沉积时期沉积水体的古盐度进行了研究.利用聚类分析方法,研究区分出3类具有不同元素地球化学特征的样品,结合Sr/Ba、Sr/Ca、Fe/Mn和Sr/Cu值对沙四段上部沉积时期的古盐度进行空间划分,结果表明沙四段上部沉积时期,研究区处于相对干旱的气候条件,但沉积水体的盐度存在空间差异性,从古湖盆的边缘到中心盐度呈升高趋势,湖盆北部盐度较低.这一认识将有助于分析该区有效烃源岩的分布和形成机制.
|
| 关 键 词： | 古盐度 沙四段上部 元素地球化学 聚类分析 东营凹陷 |
Spatial paleosalinity distribution and element geochemistry of argillaceous source rocks in the upper part of 4th Member of Tertiary Shahejie Formation in Dongying Sag |
| |
| QIAN Huan-ju,LU Xian-cai,ZHANG Xue-fen,ZHANG Lin-ye and LIU Qing.Spatial paleosalinity distribution and element geochemistry of argillaceous source rocks in the upper part of 4th Member of Tertiary Shahejie Formation in Dongying Sag[J].Acta Petrologica Et Mineralogica,2009,28(2):161-168. |
| |
| Authors: | QIAN Huan-ju LU Xian-cai ZHANG Xue-fen ZHANG Lin-ye and LIU Qing |
| |
| Institution: | School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;Geological Science Research Institute of Shengli Oilfield, Dongying 257015, China;Geological Science Research Institute of Shengli Oilfield, Dongying 257015, China;Geological Science Research Institute of Shengli Oilfield, Dongying 257015, China |
| |
| Abstract: | The upper part of 4th Member of Tertiary Shahejie Formation in Dongying Sag is composed of a set of high quality source rocks. The variation of element content and the typical element ratios generally record the characteristics of sedimentary environment. In this paper, the paleosalinity of the upper part of 4th Member was studied on the basis of a geochemical analysis of trace elements, and three assemblies of source rocks with different geochemical characteristics were distinguished by means of cluster analysis. With the ratios of Sr/Ba, Sr/Ca, Fe/Mn and Sr/Cu, the samples of the upper part of4th Member were assigned to three groups with different paleosalinities. It is indicated that the upper part of 4th Member of the Shahejie Formation was deposited under a comparatively dry weather condition. Nevertheless, the lacustrine salinity evidently increased from the shallow water near the lake brim to deep water at the lake center. Interestingly, the salinity of the northern sag is much lower, which may be attributed to the high riverine input from the Chenjiazhuang-Qingtuozi highland. These findings will highlight the studies of high quality lacustrine source rocks in the study area. |
| |
| Keywords: | paleosalinity the upper part of 4th Member element geochemistry cluster analysis Dongying Sag |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩石矿物学杂志》浏览原始摘要信息 |
| 点击此处可从《岩石矿物学杂志》下载免费的PDF全文 |
|
