本文主要研究内容
作者漆家福,吴景富,马兵山,全志臻,能源（2019）在《南海北部珠江口盆地中段伸展构造模型及其动力学》一文中研究指出：位于南海北部大陆边缘上的珠江口盆地发育NNE向、NE向、NW向、近EW向等多组基底断裂,盆地结构复杂,并表现出明显的时空差异性。本文基于珠江口盆地中段地震资料解释的构造样式的变化推断地壳中存在一条向南缓倾斜、呈坡坪式形态的拆离断层,古近系构造属于这条拆离断层上盘的伸展构造系统。北部的西江凹陷属于拆离断层伸展构造系统的头部,凹陷边界正断层铲式断层面形态向深层延伸并收敛在拆离断层面上,凹陷表现为半地堑"断陷"样式;中部的番禺低隆起对应于拆离断层的低角度断坪部位,拆离断层上盘断块的伸展位移导致两侧的恩平组超覆在低隆起上;南部的白云凹陷位于拆离断层的深部断坡部位,充填的文昌组和恩平组表现为"断坳"或"坳断"样式;南部隆起位于拆离断层深部断坪部位,其上盘发育的分支断层控制着荔湾凹陷古近系、新近系的发育并使之表现为复杂的断陷-断坳构造样式。该模型强调拆离断层上盘与下盘、不同地壳结构层均发生不同程度的伸展变形,且伸展变形方式、应变量等存在时空差异,而拆离断层正是不同构造单元、不同地壳构造层之间的调节性构造面。总体上,拆离断层上盘以脆性伸展构造变形为主,分支断层控制不同构造单元古近纪的构造演化,下盘则是以韧性伸展变形为主,并拖曳上盘发生不均一的伸展应变;西江凹陷的伸展应变量大于拆离断层下盘的伸展应变量,白云凹陷的伸展应变量则小于拆离断层下盘的伸展应变量。以西江凹陷北部边缘的NE向铲式正断层为头部的拆离断层控制了文昌组沉积,但在恩平组沉积期被近EW向高角度正断层切割破坏而被遗弃,拆离断层系统的头部由西江凹陷北部边缘迁移至番禺低隆起。盆地结构及断裂系统的时空差异性受盆地基底先存构造、地壳与岩石圈结构及伸展量等多方面因素的影响,但主要是对软流圈流动及岩石圈热结构变化的响应。用软流圈由北西向南东流动拖曳上覆岩石圈发生伸展变形的动力学模型能合理地解释珠江口盆地中段古近系构造的形成和演化。
Abstract
wei yu na hai bei bu da liu bian yuan shang de zhu jiang kou pen de fa yo NNExiang 、NExiang 、NWxiang 、jin EWxiang deng duo zu ji de duan lie ,pen de jie gou fu za ,bing biao xian chu ming xian de shi kong cha yi xing 。ben wen ji yu zhu jiang kou pen de zhong duan de zhen zi liao jie shi de gou zao yang shi de bian hua tui duan de ke zhong cun zai yi tiao xiang na huan qing xie 、cheng po ping shi xing tai de ca li duan ceng ,gu jin ji gou zao shu yu zhe tiao ca li duan ceng shang pan de shen zhan gou zao ji tong 。bei bu de xi jiang ao xian shu yu ca li duan ceng shen zhan gou zao ji tong de tou bu ,ao xian bian jie zheng duan ceng chan shi duan ceng mian xing tai xiang shen ceng yan shen bing shou lian zai ca li duan ceng mian shang ,ao xian biao xian wei ban de qian "duan xian "yang shi ;zhong bu de fan yu di long qi dui ying yu ca li duan ceng de di jiao du duan ping bu wei ,ca li duan ceng shang pan duan kuai de shen zhan wei yi dao zhi liang ce de en ping zu chao fu zai di long qi shang ;na bu de bai yun ao xian wei yu ca li duan ceng de shen bu duan po bu wei ,chong tian de wen chang zu he en ping zu biao xian wei "duan ao "huo "ao duan "yang shi ;na bu long qi wei yu ca li duan ceng shen bu duan ping bu wei ,ji shang pan fa yo de fen zhi duan ceng kong zhi zhao li wan ao xian gu jin ji 、xin jin ji de fa yo bing shi zhi biao xian wei fu za de duan xian -duan ao gou zao yang shi 。gai mo xing jiang diao ca li duan ceng shang pan yu xia pan 、bu tong de ke jie gou ceng jun fa sheng bu tong cheng du de shen zhan bian xing ,ju shen zhan bian xing fang shi 、ying bian liang deng cun zai shi kong cha yi ,er ca li duan ceng zheng shi bu tong gou zao chan yuan 、bu tong de ke gou zao ceng zhi jian de diao jie xing gou zao mian 。zong ti shang ,ca li duan ceng shang pan yi cui xing shen zhan gou zao bian xing wei zhu ,fen zhi duan ceng kong zhi bu tong gou zao chan yuan gu jin ji de gou zao yan hua ,xia pan ze shi yi ren xing shen zhan bian xing wei zhu ,bing tuo ye shang pan fa sheng bu jun yi de shen zhan ying bian ;xi jiang ao xian de shen zhan ying bian liang da yu ca li duan ceng xia pan de shen zhan ying bian liang ,bai yun ao xian de shen zhan ying bian liang ze xiao yu ca li duan ceng xia pan de shen zhan ying bian liang 。yi xi jiang ao xian bei bu bian yuan de NExiang chan shi zheng duan ceng wei tou bu de ca li duan ceng kong zhi le wen chang zu chen ji ,dan zai en ping zu chen ji ji bei jin EWxiang gao jiao du zheng duan ceng qie ge po huai er bei wei qi ,ca li duan ceng ji tong de tou bu you xi jiang ao xian bei bu bian yuan qian yi zhi fan yu di long qi 。pen de jie gou ji duan lie ji tong de shi kong cha yi xing shou pen de ji de xian cun gou zao 、de ke yu yan dan juan jie gou ji shen zhan liang deng duo fang mian yin su de ying xiang ,dan zhu yao shi dui ruan liu juan liu dong ji yan dan juan re jie gou bian hua de xiang ying 。yong ruan liu juan you bei xi xiang na dong liu dong tuo ye shang fu yan dan juan fa sheng shen zhan bian xing de dong li xue mo xing neng ge li de jie shi zhu jiang kou pen de zhong duan gu jin ji gou zao de xing cheng he yan hua 。
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论文详细介绍
论文作者分别是来自地学前缘的漆家福,吴景富,马兵山,全志臻,能源，发表于刊物地学前缘2019年02期论文，是一篇关于裂陷盆地论文,构造样式论文,拆离断层论文,构造差异性论文,动力学论文,珠江口盆地论文,地学前缘2019年02期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自地学前缘2019年02期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：裂陷盆地论文; 构造样式论文; 拆离断层论文; 构造差异性论文; 动力学论文; 珠江口盆地论文; 地学前缘2019年02期论文;