石油与天然气地质
石油與天然氣地質
석유여천연기지질
OIL & GAS GEOLOGY
2009年
5期
576-583
,共8页
裴先治%李瑞保%丁仨平%刘战庆%李佐臣%冯建赟%孙雨%张亚峰
裴先治%李瑞保%丁仨平%劉戰慶%李佐臣%馮建赟%孫雨%張亞峰
배선치%리서보%정삼평%류전경%리좌신%풍건빈%손우%장아봉
构造交接关系%叠加褶皱%陆内造山作用%米仓山%大巴山%陕南镇巴地区
構造交接關繫%疊加褶皺%陸內造山作用%米倉山%大巴山%陝南鎮巴地區
구조교접관계%첩가습추%륙내조산작용%미창산%대파산%협남진파지구
tectonic intersection relationship%superimposed fold%intracontinental orogeny%Micangshan%Dabashan%Zhenba area in southern Shaanxi Province
米仓山与大巴山构造交接的陕南镇巴地区具有典型的叠加褶皱构造.米仓山地区近东西-北东东向褶皱构造与大巴山近南北 -北北东向紧闭褶皱构造呈横跨叠加构造样式.司上地区发育的叠加褶皱表明,近南北向褶皱叠加改造早期近东西向褶皱,致使区域地层呈近南北向产出;两期褶皱发育的时代应为J_3-K_1,米仓山褶皱变形的时间要略早于南大巴山西段镇巴地区变形时间,分别为晚侏罗世(J_3)和晚侏罗世-早白垩世之间(J_3/K_1).大巴山与米仓山构造交接变形是在印支期碰撞造山作用基础上,燕山期陆内造山作用期间不同体系构造复合叠加的产物.
米倉山與大巴山構造交接的陝南鎮巴地區具有典型的疊加褶皺構造.米倉山地區近東西-北東東嚮褶皺構造與大巴山近南北 -北北東嚮緊閉褶皺構造呈橫跨疊加構造樣式.司上地區髮育的疊加褶皺錶明,近南北嚮褶皺疊加改造早期近東西嚮褶皺,緻使區域地層呈近南北嚮產齣;兩期褶皺髮育的時代應為J_3-K_1,米倉山褶皺變形的時間要略早于南大巴山西段鎮巴地區變形時間,分彆為晚侏囉世(J_3)和晚侏囉世-早白堊世之間(J_3/K_1).大巴山與米倉山構造交接變形是在印支期踫撞造山作用基礎上,燕山期陸內造山作用期間不同體繫構造複閤疊加的產物.
미창산여대파산구조교접적협남진파지구구유전형적첩가습추구조.미창산지구근동서-북동동향습추구조여대파산근남북 -북북동향긴폐습추구조정횡과첩가구조양식.사상지구발육적첩가습추표명,근남북향습추첩가개조조기근동서향습추,치사구역지층정근남북향산출;량기습추발육적시대응위J_3-K_1,미창산습추변형적시간요략조우남대파산서단진파지구변형시간,분별위만주라세(J_3)화만주라세-조백성세지간(J_3/K_1).대파산여미창산구조교접변형시재인지기팽당조산작용기출상,연산기륙내조산작용기간불동체계구조복합첩가적산물.
Typical superimposed fold structure occurs in the Zhengba region,southern Shaanxi Province,where the Micangshan and Dabashan structures intersect with each other.The nearly EW-NEE trending fold structures in Micangshan area and the nearly SN-NNE trending closed fold structures in Dabashan area are in traverse superimposition.The superimposed folds developed in the Sishang area show that the early E-W trending folds were superimposed and deformed by the late S-N trending folds,resulting in the nearly S-N occurrence of the regional strata.These folds were developed during J_3-K_1.However,the folding and deformation of the Micangshan area happened in the Late Jurassic (J_3),a little earlier than that of the Zhenba area (the west segment of the southern Dabashan Mountain),which happened during the Late Jurassic and Early Cretaceous (J_3/K_1).The intersection and deformation of Dabashan and Micangshan were resulted from superimposition of different tectonic systems during the Yanshanian intracontinental orogeny on the basis of the Indosinian collision orogeny.
