天文轨道周期调制的海平面变化对生物礁发育的影响——以川东北地区晚二叠世长兴期为例  

Effects of sea level change modulated by astronomical orbital period on organic reefs development:a case study of Late Permian Changxing in Northeast Sichuan

作　　者：李红佼 张廷山[1] 张喜[1,2] 肖强 高璐彪 LI Hongjiao;ZHANG Tingshan;ZHANG Xi;XIAO Qiang;GAO Lubiao(School of Earth Science and Technology,Southwest Petroleum University,Chengdu 610500,China;Natural Gas Geology Key Laboratory of Sichuan Province,Sothwest Petroleum University,Chengdu 610500,China;Petroleum Exploration and Production Research Institute,Northwest Oilfield Company,SINOPEC,Urumqi 830011,China)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]西南石油大学天然气地质四川省重点实验室,四川成都610500 [3]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011

出　　处：《断块油气田》2023年第1期52-59,共8页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目“多场耦合条件下甲烷/二氧化碳在页岩非均质储层中的动力学特征研究”(41772150)、“四川盆地北部晚三叠世须家河期古气候的沉积-生态响应”(41972120)。

摘　　要：为探讨天文轨道周期驱动下全球海平面升降对生物礁发育的影响,选取湾滩河剖面长兴期自然伽马数据序列进行数据预处理、频谱分析、天文检验、滤波和调谐后,建立“浮动”天文年代标尺。文中基于旋回地层学、2种轨道调谐后的动态沉积噪音模型(DYNOT和ρ1)分析结果、La2010d天文调制方案以及长偏心率周期(405 kyr)与斜率长周期(1.2 myr)的正相关性可知,斜率长周期(1.2 myr)与海平面变化曲线具有相关性,该时期海平面变化受到轨道长周期(1.2 myr)驱动。无机碳同位素分析表明,轨道长周期(1.2 myr)驱动下的海平面升降影响着海洋环境的变化,进而影响着生物礁的生长发育。In order to investigate the effect of global sea level rise and fall driven by astronomical orbit period on the development of organic reefs,the natural gamma data sequence of the Changxing period of Wantanhe section was selected.After data preprocessing,spectrum analysis,astronomical test,filtering and astronomical tuning,a"floating"astronomical age scale was established.Based on the analysis results of cyclostratigraphy and two dynamic sedimentary noise models based on orbital tuning(DYNOT andρ1),combined with the astronomical modulation schemes of La2010d,and the positive correlation between long eccentricity period(405 kyr)and obliquity long period(1.2 myr),it is shown that the obliquity long period(1.2 myr)is correlated with the sea level change curve,and the sea level change during this period is driven by the orbital long period(1.2 myr).Inorganic carbon isotope analysis indicates that sea level rise and fall driven by orbital long period(1.2 myr)affect changes of marine environment,which in turn affects the growth and development of organic reefs.

关 键 词：旋回地层学 古气候 海平面变化 生物礁 驱动力 川东北地区 

分 类 号：TE121.34[石油与天然气工程—油气勘探]