| 吴小林,田亚铭,王勇,李文杰,胡修权,孟兴平.川南地区下志留统石牛栏组岩相古地理特征与演化[J].地质找矿论丛,2024,39(1):97-111 |
| 川南地区下志留统石牛栏组岩相古地理特征与演化 |
| Characteristics and evolution of Lithofacies paleogeography in southern Sichuan province |
| 投稿时间：2023-09-18 |
| DOI：10.6053/j.issn.1001-1412.2024.01.012 |
| 中文关键词: 石牛栏组 沉积相 岩相古地理 沉积模式 川南地区 |
| 英文关键词:Shiniulan formation sedimentary fancies Lithofacies paleo-geography sedimentary model southern Sichuan province |
| 基金项目:国家自然科学基金项目"基于深度学习地震多属性预测碳酸盐岩沉积相展布"（编号：42172175）、四川省自然科学基金青年基金项目（编号：2023NSFSC0759）联合资助。 |
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| 中文摘要: |
| 川南地区下志留统石牛栏组具有较为丰富的油气显示，一直是油气勘探的关注层位，但对石牛栏组沉积相模式与沉积展布的认识依然存在分歧。本文基于野外剖面、测录井、薄片以及地化数据等测试分析，开展了川南地区石牛栏组岩相古地理展布及模式研究。研究结果表明，川南-川西南地区石牛栏组以碳酸盐岩沉积发育为主，识别出中缓坡、外缓坡、开阔台地、台地边缘礁滩、台地前缘斜坡等沉积亚相，其东西两侧受陆源碎屑限制，北部为广海陆棚沉积；石牛栏组早期发育碳酸盐岩缓坡沉积模式，晚期转变为碳酸盐岩台地沉积模式，生物建隆、碳酸盐沉积速率增大以及碳酸盐岩较碎屑岩海域高沉积速率差异是其转变的关键因素。 |
| 英文摘要: |
| The Lower Silurian Shiniulan formation in southern Sichuan province has been the focus of oil and gas exploration due to well oil and gas display there. However, viewpoint about sedimentary facies model and distribution of the formation is still different. Field sections, well log, thin sections and geochemical data are checked and distribution and sedimentary facies model in southern Sichuan province studied. Shiniulan formation in southern and Southwest Sichuan province is dominated by carbonate rock sedimentary facies. From the carbonate rock sub-sedimentary facies: middle gentle slope, outer gentle slope, open platform, marginal reef beach facies and front sedimentary facies of the platform are recognized. The east and west ends of the formation are limited by terriginous debris, in the north is continental shelf deposit. In the early stage of the formation is developed gentle slope carbonate rock sedimentary facies, in the late stage turns to platform sedimentary model and carbonate rock sedimentary rate of biotic uplift increases. Sedimentary rate of the carbonate rock is higher than that of debris. The sedimentary rate difference is the factor for the transformation of the sedimentary facies model. |
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