Diagenesis of Intermediate and Mafic Volcanic Rocks of Yingcheng Formation（K1y） in the Songliao Basin: Sequential Crystallization, Amygdule Filling and Reservoir Effect
详细信息
- 责任者：Liu Wanzhu (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Huang Yulong
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(1)
- 关键词：火山岩 ; volcanic rocks ; 成矿作用 ; metallogenesis
- 页码：p.158-165
- 图表：1 illus., 1 table, 1 plate, 30 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Crystallizing sequence, amygdule filling features and reservoir effect were studied on the intermediate and mafic volcanic rocks of the Yingcheng Formation in the Songliao Basin by means of microscope, chemical determination and electron probe. The volcanics include basalt, andesite, basaltic andesite, trachybasalt, basaltic trachyandesite and trachyte. Crystallizing sequence of the porphyritic crystals is studied. There are two kinds of amygdule, mono- and multiple component ones. The mono is silica or calcite with growing rings showing increasingly sized particles inwards, which is preferred to be interpreted as sequential precipitation of a post fluid. This can deteriorate the reservoir quality.