王翼君,杨光,王振宇,唐洪明,张云峰,屈海洲

• 1:西南石油大学地球科学与技术学院

摘要(Abstract)：

生物礁研究对沉积环境与油气勘探具有重要意义，但目前对于塔西南石炭系生物礁研究相对较少。深入解析了塔西南阿尔塔什剖面早石炭世维宪期中-晚期和什拉甫组生物礁地质特征，并在此基础上深入探讨了塔西南早石炭世沉积环境以及该生物礁在全球早石炭世生物礁演化中的意义。结果表明：该套生物礁的造礁生物主要为各种群体珊瑚以及少量单体珊瑚，附礁生物主要为棘皮动物等，造礁和附礁生物类型相对单一。礁体的生长受陆源物质的影响而中断，这和塔西南山前早石炭世频繁的海平面变化有关。该生物礁是继晚泥盆世生物大灭绝后，伴随着维宪期中-晚期气候变暖、全球海平面上升，全球范围内后生动物骨架礁开始复苏的产物之一，该生物礁的地质特征在全球早石炭世维宪期生物礁中具有普遍性。此外，根据对阿尔塔什剖面和什拉甫组以及相邻的库山河剖面罕铁热克组的整体沉积相分析，推测早石炭世维宪期，受当时全球海平面上升的影响以及塔西南地区在早石炭世开始形成被动大陆边缘并开始下沉，使得塔西南地区从早石炭世开始发生自南西向北东方向的海侵，在塔西南山前也逐渐形成了狭长的台地边缘相带，这有利于生物礁的发育，并在和什拉甫组时期自陆向海形成了“滨岸相-泻湖相-台地边缘相-斜坡相-陆棚相”的沉积体系。沉积体系的划分不仅可以为塔西南地区石炭纪古气候、古环境研究而且可以为其油气勘探提供参考。

关键词(KeyWords)： 阿尔塔什;生物礁;早石炭世;珊瑚;海平面;和什拉甫组

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41702163; 42272181)

作者(Author): 王翼君,杨光,王振宇,唐洪明,张云峰,屈海洲

DOI: 10.19509/j.cnki.dzkq.tb20220516

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