| 辽河盆地西部凹陷粘土矿物的成岩作用研究 |
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| 引用本文： | 陈永武,任磊夫. 辽河盆地西部凹陷粘土矿物的成岩作用研究[J]. 沉积学报, 1985, 3(3): 51-64 |
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| 作者姓名： | 陈永武 任磊夫 |
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| 作者单位： | 1.石油勘探开发科学研究院地质所; |
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| 摘 要： | 对辽河盆地西部凹陷兴隆台、马圈子、欢喜岭和曙光等地沙河街组不同深度的层位,高升地区(属弱碱性和弱氧化-弱还原环境的沙四段分别采样,经X-光衍射、电子显微镜、化学分析和差热、红外等项目的分析鉴定,研究区内的粘土矿物有: 蒙脱石 在全区较浅的地层(如欢喜岭地区小于1000米,兴隆台地区小于1500米)中均有分布。其主要成份为二八面体的钙蒙脱石。 皂石 为黑色橄榄-辉石玄武岩的次生产物。
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| 收稿时间： | 1983-11-19 |
STUDY ON DIAGENESIS OF CLAY MINERALS IN THE WESTERN DEPRESSION OF THE LIAOHE BASIN |
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| Affiliation: | 1.C Scientific Research Institute of Petroleum Exploration and Development, Beijing;2.Peking University |
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| Abstract: | Different clay mineral assemblages and their replacement have been formed in different sedimentary and diagenetic environments in the western depression ( Huan-xiling, Xinglongtai and Maquanzhi ): 1.Montmorillonite-I/M-illite-kaolinite mineral assemblage 2.1/M-authigenic illite-atlthigenic chiorite mineral assemblage The weak acidic and weak alkaline environments were transformed into slight alkaine-weak reductive ones with the increase of depth and geothermal and mont-morillonite and I/M turned into illite and trioctahedron chlorite. In the north region of the western depression ( Gaosheng and the local area of Shuguang)t 1. I/M-illie mineral assemblage 2. Glauconite-trioctahedron smectite mineral assemblage 3. Fe-saponite mineral The Sha-4 stage in the area was a slight alkaline-weak reductive sedimentary environment without kaolinite mineral and Ca, Fe3 + Fe2+and Mg were rich in the environment due to the degeneration of the secondary saponite from basalt into trio-dioctahedron smectite. Together with Fe and Mg, K and Al supplied by solubilized K and Al-bearing terrigenous minerals under the higher geothermal moved into I/M crystal lattices and thus forming glauconite. The evidence of mineralogy has shown that the geochemical properties of the sedimentary and diagenetic environments are the principal factors which control low-temperature geochemial behaviors of clay minerals during the diagenesis, and secondly, the temperature also plays an important part during the diagenesis of clay minerals. |
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