四川盆地米仓山前大两会背斜构造几何学与成因机制的研究
|
摘要
米仓山构造位置位于四川盆地北部,米仓山北部邻近东西向的秦岭构造带,东侧紧邻大巴山弧形推覆构造带,西侧紧邻松潘-甘孜造山带和北东向龙门山推覆构造带,米仓山构造系统受三大构造系统的共同控制。米仓山所处构造位置独特性与其本身地层岩性的多变性最终导致了米仓山成为一个复杂的叠合造山带,文章着重于对米仓山前复杂构造几何学与运动学的研究,拟定构造变行期次与时问。
本文主要是通过对米仓山前地层岩性进行研究,划分出米仓山前的主要滑脱层,它们分别是震旦纪的页岩层、寒武纪的泥页岩层、三叠纪嘉陵江组的膏岩层;结合大量的地层剖面对米仓山前的构造几何形态进行研究,判定米仓山由西向东构造特征的变化,以及滑脱层的深度变化,不同的构造特征由不同深度的滑脱层控制,并结合米仓山前地震剖面进行构造解析,利用断层相关褶皱理论,对剖面进行等倾角区划分、轴面分析,对其基底逆冲断层的几何形态进行研究,对逆冲断层产生的位移量进行分析。
通过对米仓山前晚三叠世须家河地层到早白垩系剑门关组地层进行磁性地层学研究,得到从晚三叠世须家河组地层到早白垩世汉阳铺组地层的沉积年限:
须家河组沉积的时间定在了从227.4Ma—209.6Ma;
白田坝组沉积的时间定在了从199.6Ma—193.8Ma;
千佛岩组地层沉积从193.8Ma—175.6Ma;
沙溪庙组的地层沉积从175.6Ma—163.6Ma;
遂宁组地层沉积时间定为163.6Ma—161.2Ma;
剑门关组地层沉积时间定为144.9Ma—140.4Ma;
汉阳铺组地层沉积时间最终定为140.4Ma—132.8Ma。
通过野外对从晚三叠世到早白垩世地层不整合面进行识别:晚三叠世须家河组地层与早侏罗世白田坝组地层不整合;晚侏罗世蓬莱镇组地层与早白垩世剑门关组地层不整合,大致判断出米仓山隆起的时间。并结合各地层沉积速率的变化和生长地层的识别最终拟定米仓山在印支期和燕山早期各发生一次隆升。
通过地表剖面和地震剖面的分析,得到米仓山地震剖面位移量分析:测线2004-dlh-001位移量大于28km,测线TNB-04-04-118MIG位移量为28km,测线cross-hb102位移量为16.9km,其中基底逆冲断层产生的时间为印支晚期。最终得出结论米仓山前由西向东构造特征由难到简、位移量由大到小、构造应力有强到弱;中生代以来主要有两期次构造运动分别是:印支晚期与燕山早期,其中大两会背斜在印支晚期基本成型,而燕山早期构造运动促使了通南巴背斜的形成。
Micangshan mountain is located in northern Sichuan basin , Micangshan mountain is adjacent to Qinling oroganic belt in the north, and closed to ark-like Dabashan Mountain in the east . There lie Songpan-Ganzhi oroganic belt and Longmen nappe in the west . Micang mountain is influenced by the three structure systems . Considering the unique structure situation and mechanical stratigraphy makes it as a very complicated oroganic belt . The paper is to anlayse the structure geometry and kinematics in Micangshan mountain foreland ,work out the stage and geological age of those structures.
This paper mainly reaserchs the formation lithology in front of Micang mountain, classify the detachment in front of Micang mountain, they are : shale of Sinian , clay shale of Cambrian , gypsum of Triassic ; Using amount of cross-section identify the geometric shape of Micang mountain structure , analyse the structural feature of Micang mountain from west to east, and the change of the depth of these detachment, different structural feature is controlled by different detachment with different depth . With structure analysis of seimic profile from Micang mountain , use fault-related folding theory , indentifying the dip-domain , analysing the axial-surface , the geometric shape of the basement thrust system , and the displacement of these thrust.
We do some palaeomagnetism research from late Triassic Xujiahe group to early Cretaceous Hanyangpu group , and gain the depositional time of these stratas:
Xujiahe group strata'depositional time is from 227.4 Ma to 209.6 Ma;
Baitianba group strata'depositional time is from 199.6Ma to 193.8 Ma;
Qianfoyan group strata'depositional time is from 193.8Ma to 175.6 Ma;
Shaximiao group strata'depositional time is from 175.6 Ma to 163.6 Ma;
Suining group strata'depositional time is from 163.6Ma to 161.2Ma;
Jianmenguan group strata'depositional time is from 144.9Ma to 140.4Ma;
Hanyangpu group strata'depositional time is from 140.4Ma to 132.8Ma.
Recognize the uncomformity from late Triassic to early Cretaceous through field work : uncomformity between late Triassic and early Jurassic ; uncomformity between late Jurassic and early Cretaceous , recognize the growth strata and analyse the depositional rate , finally a conclude how many stage Micangshan mountain experience and when Micangshan mountain uplifts.
Use crosssection anlysing the fault displacement : fault displacement of line 2004-dlh-001 is larger than 28km, fault displacement of line TNB-04-04-118MIG is 28km, fault displacement of line cross-hb102 is 16.9km .Finally we reach a conclusion that the structure feature from west to east is complicate to simple , the displacement from west to east is large to small, the stress from west to east is intense to weak . And there are two stage in Mesozoic time,they are Indo-Chinease Epoch and Eearly Yansha Epoch.And Dalianghui anticline develops in Indo-Chinease Epoch, Tongnanba anticline in Eearly Yansha Epoch.
本文主要是通过对米仓山前地层岩性进行研究,划分出米仓山前的主要滑脱层,它们分别是震旦纪的页岩层、寒武纪的泥页岩层、三叠纪嘉陵江组的膏岩层;结合大量的地层剖面对米仓山前的构造几何形态进行研究,判定米仓山由西向东构造特征的变化,以及滑脱层的深度变化,不同的构造特征由不同深度的滑脱层控制,并结合米仓山前地震剖面进行构造解析,利用断层相关褶皱理论,对剖面进行等倾角区划分、轴面分析,对其基底逆冲断层的几何形态进行研究,对逆冲断层产生的位移量进行分析。
通过对米仓山前晚三叠世须家河地层到早白垩系剑门关组地层进行磁性地层学研究,得到从晚三叠世须家河组地层到早白垩世汉阳铺组地层的沉积年限:
须家河组沉积的时间定在了从227.4Ma—209.6Ma;
白田坝组沉积的时间定在了从199.6Ma—193.8Ma;
千佛岩组地层沉积从193.8Ma—175.6Ma;
沙溪庙组的地层沉积从175.6Ma—163.6Ma;
遂宁组地层沉积时间定为163.6Ma—161.2Ma;
剑门关组地层沉积时间定为144.9Ma—140.4Ma;
汉阳铺组地层沉积时间最终定为140.4Ma—132.8Ma。
通过野外对从晚三叠世到早白垩世地层不整合面进行识别:晚三叠世须家河组地层与早侏罗世白田坝组地层不整合;晚侏罗世蓬莱镇组地层与早白垩世剑门关组地层不整合,大致判断出米仓山隆起的时间。并结合各地层沉积速率的变化和生长地层的识别最终拟定米仓山在印支期和燕山早期各发生一次隆升。
通过地表剖面和地震剖面的分析,得到米仓山地震剖面位移量分析:测线2004-dlh-001位移量大于28km,测线TNB-04-04-118MIG位移量为28km,测线cross-hb102位移量为16.9km,其中基底逆冲断层产生的时间为印支晚期。最终得出结论米仓山前由西向东构造特征由难到简、位移量由大到小、构造应力有强到弱;中生代以来主要有两期次构造运动分别是:印支晚期与燕山早期,其中大两会背斜在印支晚期基本成型,而燕山早期构造运动促使了通南巴背斜的形成。
Micangshan mountain is located in northern Sichuan basin , Micangshan mountain is adjacent to Qinling oroganic belt in the north, and closed to ark-like Dabashan Mountain in the east . There lie Songpan-Ganzhi oroganic belt and Longmen nappe in the west . Micang mountain is influenced by the three structure systems . Considering the unique structure situation and mechanical stratigraphy makes it as a very complicated oroganic belt . The paper is to anlayse the structure geometry and kinematics in Micangshan mountain foreland ,work out the stage and geological age of those structures.
This paper mainly reaserchs the formation lithology in front of Micang mountain, classify the detachment in front of Micang mountain, they are : shale of Sinian , clay shale of Cambrian , gypsum of Triassic ; Using amount of cross-section identify the geometric shape of Micang mountain structure , analyse the structural feature of Micang mountain from west to east, and the change of the depth of these detachment, different structural feature is controlled by different detachment with different depth . With structure analysis of seimic profile from Micang mountain , use fault-related folding theory , indentifying the dip-domain , analysing the axial-surface , the geometric shape of the basement thrust system , and the displacement of these thrust.
We do some palaeomagnetism research from late Triassic Xujiahe group to early Cretaceous Hanyangpu group , and gain the depositional time of these stratas:
Xujiahe group strata'depositional time is from 227.4 Ma to 209.6 Ma;
Baitianba group strata'depositional time is from 199.6Ma to 193.8 Ma;
Qianfoyan group strata'depositional time is from 193.8Ma to 175.6 Ma;
Shaximiao group strata'depositional time is from 175.6 Ma to 163.6 Ma;
Suining group strata'depositional time is from 163.6Ma to 161.2Ma;
Jianmenguan group strata'depositional time is from 144.9Ma to 140.4Ma;
Hanyangpu group strata'depositional time is from 140.4Ma to 132.8Ma.
Recognize the uncomformity from late Triassic to early Cretaceous through field work : uncomformity between late Triassic and early Jurassic ; uncomformity between late Jurassic and early Cretaceous , recognize the growth strata and analyse the depositional rate , finally a conclude how many stage Micangshan mountain experience and when Micangshan mountain uplifts.
Use crosssection anlysing the fault displacement : fault displacement of line 2004-dlh-001 is larger than 28km, fault displacement of line TNB-04-04-118MIG is 28km, fault displacement of line cross-hb102 is 16.9km .Finally we reach a conclusion that the structure feature from west to east is complicate to simple , the displacement from west to east is large to small, the stress from west to east is intense to weak . And there are two stage in Mesozoic time,they are Indo-Chinease Epoch and Eearly Yansha Epoch.And Dalianghui anticline develops in Indo-Chinease Epoch, Tongnanba anticline in Eearly Yansha Epoch.
引文
Andreas Plesch John H.Shaw mechanics of low relief detachment folding AAPG 2007 Vol.91 No. 11
Chris A. Guzofski insights into the mechanisms of fault related folding provided by volumetric structural restorations using spatially varying mechanical constraints AAPG 2009 Vol. 93 No.4
Freddy Corredor, John H.Shaw structural styles in the deep water fold and thrust belts of the niger delta AAPG 2005 Vol.89 No. 6
Ioannis D. Papanikolaou, Gerald P. Roberts Geometry, kinematics and deformation rates along the active normal fault system in the southern Apennines: Implications for fault growth Journal of Structural Geology 2007
Jie Chen, D. W. Bubank Magnetochronology of the Upper Cenozoic strata in the Southwestern Chinese Tian Shan rates of Pleistocene folding and thrusting EPSL 2002 P113-130
John H.Shaw Patterns of imbricate thrusting GSA Bulletin 1999 P1140-1154
John Suppe Bed-by-bed fold growth by kink-band migration Journal of Structural Geology 1997 P443-461
John Suppe Donald A. Medwedeff Geometry and kinematics of fault-propagation folding
John suppe Geometry and kinematics of fault bend folding American Journal of Science 1983 P684-721
John Suppe, George . T Chou Rates of folding and faulting determined from growth strata
Julien Chrreau , Yan Chen Magnetostratigraphy and rock magnetism of the Neogene Kuitun He section (northwest China) implications for Late Cenozoic uplift of the Tianshan mountains EPSL 2005 P177-192
Kaj M. Johnson Mechanical models of trishear-like folds Journal of Structural Geology 2001
NANCYE H .DAWERS and MARK H .ANDERS Displacement-length scaling and fault linkage Journal of Structural Geology 1995 Vol.17 No.5
Ramon Gonzalez-Mieres , John Suppe Relief and shortening in detachment folds Journal of Structural Geology 2006
Rion H.Camerlo and Edward F.Benson geometric and seismic interpretation of the perdido fold heir AAPG 2006 Vol.90 No.3
Shankar Mitra Structural models of faulted detachment folds AAPG 2002 Vol.86 No.9
Wesley K.Wallace Detachment folds versus Fault-propagation fold and their Truncation by Thrust Faults AAPG 2004 P:324-355
陈竹新,贾东,等 龙门山前陆褶皱冲断带的平衡剖面分析 地质学报2005 Vol.79 No.1
丁道桂,郭彤楼,等鄂西-渝东区膝折构造 石油实验地质2005 Vol.27 No.3
管树巍,李本亮,等准噶尔盆地西北缘下盘掩伏构造油气勘探新领域 石油勘探与开发2008Vol.35 No.1
管树巍,李本亮,何登发,等复杂构造解析中的几何学方法与应用 地质科学2007 42(2):722-739
管树巍,李本亮,何登发,等 晚新生代以来天山南,北麓冲断作用的定量分析 地质学报2007年vol.81.No.6
管树巍,汪新,杨树锋,何登发,等 位移转换的两种概念模型与实例 中国科学D 200434(9):807-817
管树巍,张朝军,何登发,等 前陆冲断带复杂构造解析与建模-以准格尔盆地南缘第一排背斜带为例 地质学报2006 Vol 80 No.8
郭卫星,漆家福 同生长褶皱生长地层中沉积与构造关系 现代地质2008 Vol.22 No.4
何登发 不整合面的结构与油气聚集 石油勘探与开发 2007 Vol.34 No.2
何登发 断裂-岩性体油气藏特征 石油学报2007 Vol.28 No.2
何登发,John Suppe三角剪切断层传播褶皱作用理论与应用 地学前缘2007 Vol.14 No.4
何登发,陈新发,等准噶尔盆地车排子-莫索湾古隆起的形成演化与成因机制 地学前缘 2008Vol.15 No.4
何登发,等前陆冲断带构造分段特征-以准噶尔盆地西北缘断裂构造带为例 地学前缘2004Vol.11 No.3
何登发,管树巍,等准噶尔盆地哈拉阿拉特山冲断带构造及找油意义 新疆石油地质2006Vol.27 No.3
何登发,贾承造 冲断构造与油气聚集 石油勘探与开发 2005 Vol.32 No.2
何登发,柳少波,等塔里木盆地大油田的勘探方向-以麦盖提斜坡构造为例 勘探家 1999第 四卷 第二册
何登发,杨庚,管树巍,等 前陆盆地构造建模的原理与基本方法 石油勘探与开发2005年6月vol.32 No.3
胡修棉,吴德超 米仓山南缘基底断裂带上两段有限应变和形成条件成 都理工学院学报2000 Vol.27 No.3
姜在兴,田继军,等 川西前陆盆地上三叠统沉积特征 古地理学报 2007 Vol.9 No.2
汪新 南大山山前复杂褶皱的构造形态分析:以库车秋里塔克背斜和柯坪八盘水磨背斜为例高校地质学报2005 Vol.11 No.4,p568-576
汪新,贾承造,杨树锋 南天山库车褶皱冲断带构造几何学和运动学 地质科学2002 37(3)
汪新,贾承造,杨树锋,John Suppe,等 南天山库车冲断褶皱带构造变形时间-以库车河地区为例 地质学报2002 Vol.76 No.1
王顺玉,戴鸿鸣,等大巴山,米仓山南缘烃源岩特征研究 天然气地球科学2000 Vol.11NO.4-5
吴世徉,马永生,等 米仓山前陆盆地东段构造演化模式与油气聚集 石油勘探与开发2006Vol.3:3 No.1
吴世徉,汤良杰,等 四川盆地米仓山前陆冲断带成藏条件分析 地质学报2006 Vol.80 No.3
夏在连,徐国强,等 米仓山东段-大巴山前缘圈闭构造样式分析 成都理工大学学报(自然科学版)2008 Vol.35 No.1
谢邦华,陈盛吉,等 米仓山上前带油气成藏地质条件分析 天然气勘探与开发2007
张箭,徐强,等 川西龙门山前陆盆地构造沉降初步分析 沉积与特捉斯地质2002 Vol.22No.4
赵兵 米仓山基底周缘震旦纪岩石地层及层序地层特征 矿物岩石 1999 P46-51
赵兵 米仓山南缘奥陶纪地层新见 成都理工学院学报 1999 Vol.26 No.1
郑荣才,朱如凯,等 川东北类前陆盆地须家河组盆-山耦合过程的沉积-层序特征 地质学报2008 Vol.82.No.8
周路,郑金云,等准噶尔盆地车莫古隆起侏罗系剥蚀厚度恢复 古地理学报2007 Vol.9 No.3
Chris A. Guzofski insights into the mechanisms of fault related folding provided by volumetric structural restorations using spatially varying mechanical constraints AAPG 2009 Vol. 93 No.4
Freddy Corredor, John H.Shaw structural styles in the deep water fold and thrust belts of the niger delta AAPG 2005 Vol.89 No. 6
Ioannis D. Papanikolaou, Gerald P. Roberts Geometry, kinematics and deformation rates along the active normal fault system in the southern Apennines: Implications for fault growth Journal of Structural Geology 2007
Jie Chen, D. W. Bubank Magnetochronology of the Upper Cenozoic strata in the Southwestern Chinese Tian Shan rates of Pleistocene folding and thrusting EPSL 2002 P113-130
John H.Shaw Patterns of imbricate thrusting GSA Bulletin 1999 P1140-1154
John Suppe Bed-by-bed fold growth by kink-band migration Journal of Structural Geology 1997 P443-461
John Suppe Donald A. Medwedeff Geometry and kinematics of fault-propagation folding
John suppe Geometry and kinematics of fault bend folding American Journal of Science 1983 P684-721
John Suppe, George . T Chou Rates of folding and faulting determined from growth strata
Julien Chrreau , Yan Chen Magnetostratigraphy and rock magnetism of the Neogene Kuitun He section (northwest China) implications for Late Cenozoic uplift of the Tianshan mountains EPSL 2005 P177-192
Kaj M. Johnson Mechanical models of trishear-like folds Journal of Structural Geology 2001
NANCYE H .DAWERS and MARK H .ANDERS Displacement-length scaling and fault linkage Journal of Structural Geology 1995 Vol.17 No.5
Ramon Gonzalez-Mieres , John Suppe Relief and shortening in detachment folds Journal of Structural Geology 2006
Rion H.Camerlo and Edward F.Benson geometric and seismic interpretation of the perdido fold heir AAPG 2006 Vol.90 No.3
Shankar Mitra Structural models of faulted detachment folds AAPG 2002 Vol.86 No.9
Wesley K.Wallace Detachment folds versus Fault-propagation fold and their Truncation by Thrust Faults AAPG 2004 P:324-355
陈竹新,贾东,等 龙门山前陆褶皱冲断带的平衡剖面分析 地质学报2005 Vol.79 No.1
丁道桂,郭彤楼,等鄂西-渝东区膝折构造 石油实验地质2005 Vol.27 No.3
管树巍,李本亮,等准噶尔盆地西北缘下盘掩伏构造油气勘探新领域 石油勘探与开发2008Vol.35 No.1
管树巍,李本亮,何登发,等复杂构造解析中的几何学方法与应用 地质科学2007 42(2):722-739
管树巍,李本亮,何登发,等 晚新生代以来天山南,北麓冲断作用的定量分析 地质学报2007年vol.81.No.6
管树巍,汪新,杨树锋,何登发,等 位移转换的两种概念模型与实例 中国科学D 200434(9):807-817
管树巍,张朝军,何登发,等 前陆冲断带复杂构造解析与建模-以准格尔盆地南缘第一排背斜带为例 地质学报2006 Vol 80 No.8
郭卫星,漆家福 同生长褶皱生长地层中沉积与构造关系 现代地质2008 Vol.22 No.4
何登发 不整合面的结构与油气聚集 石油勘探与开发 2007 Vol.34 No.2
何登发 断裂-岩性体油气藏特征 石油学报2007 Vol.28 No.2
何登发,John Suppe三角剪切断层传播褶皱作用理论与应用 地学前缘2007 Vol.14 No.4
何登发,陈新发,等准噶尔盆地车排子-莫索湾古隆起的形成演化与成因机制 地学前缘 2008Vol.15 No.4
何登发,等前陆冲断带构造分段特征-以准噶尔盆地西北缘断裂构造带为例 地学前缘2004Vol.11 No.3
何登发,管树巍,等准噶尔盆地哈拉阿拉特山冲断带构造及找油意义 新疆石油地质2006Vol.27 No.3
何登发,贾承造 冲断构造与油气聚集 石油勘探与开发 2005 Vol.32 No.2
何登发,柳少波,等塔里木盆地大油田的勘探方向-以麦盖提斜坡构造为例 勘探家 1999第 四卷 第二册
何登发,杨庚,管树巍,等 前陆盆地构造建模的原理与基本方法 石油勘探与开发2005年6月vol.32 No.3
胡修棉,吴德超 米仓山南缘基底断裂带上两段有限应变和形成条件成 都理工学院学报2000 Vol.27 No.3
姜在兴,田继军,等 川西前陆盆地上三叠统沉积特征 古地理学报 2007 Vol.9 No.2
汪新 南大山山前复杂褶皱的构造形态分析:以库车秋里塔克背斜和柯坪八盘水磨背斜为例高校地质学报2005 Vol.11 No.4,p568-576
汪新,贾承造,杨树锋 南天山库车褶皱冲断带构造几何学和运动学 地质科学2002 37(3)
汪新,贾承造,杨树锋,John Suppe,等 南天山库车冲断褶皱带构造变形时间-以库车河地区为例 地质学报2002 Vol.76 No.1
王顺玉,戴鸿鸣,等大巴山,米仓山南缘烃源岩特征研究 天然气地球科学2000 Vol.11NO.4-5
吴世徉,马永生,等 米仓山前陆盆地东段构造演化模式与油气聚集 石油勘探与开发2006Vol.3:3 No.1
吴世徉,汤良杰,等 四川盆地米仓山前陆冲断带成藏条件分析 地质学报2006 Vol.80 No.3
夏在连,徐国强,等 米仓山东段-大巴山前缘圈闭构造样式分析 成都理工大学学报(自然科学版)2008 Vol.35 No.1
谢邦华,陈盛吉,等 米仓山上前带油气成藏地质条件分析 天然气勘探与开发2007
张箭,徐强,等 川西龙门山前陆盆地构造沉降初步分析 沉积与特捉斯地质2002 Vol.22No.4
赵兵 米仓山基底周缘震旦纪岩石地层及层序地层特征 矿物岩石 1999 P46-51
赵兵 米仓山南缘奥陶纪地层新见 成都理工学院学报 1999 Vol.26 No.1
郑荣才,朱如凯,等 川东北类前陆盆地须家河组盆-山耦合过程的沉积-层序特征 地质学报2008 Vol.82.No.8
周路,郑金云,等准噶尔盆地车莫古隆起侏罗系剥蚀厚度恢复 古地理学报2007 Vol.9 No.3
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |