扬子地台北缘南郑马元—宁强阳平关沉积盆地沉积构造事件与海平面变化响应  

The response of Mayuan,Nanzheng-Yangpingguan,Ningqiang sedimentary basin on the northern edge of the Yangtze platform to tectonic events and sea level changes

作　　者：唐永忠 石尊应 高荣虎 朱增伍 刘利民 马林[3] 

机构地区：[1]陕西地质调查院,陕西西安710054 [2]陕西地质一队,陕西安康725000 [3]陕西旬阳国土资源局,陕西旬阳725700

出　　处：《中国地质》2011年第1期52-64,共13页Geology in China

基　　金：中国地质调查局陕西喜神坝-大河坝地区矿产远景调查项目(矿调﹝2004﹞9-3号;1212010781067)资助

摘　　要：位于扬子地台北部被动边缘的南秦岭南郑—阳平关一带古生代沉积盆地,发育一套早古生代—中生代碳酸盐岩夹细碎屑岩沉积,沉积构造及岩相清晰。通过对区内沉积盆地地层特征及侧向变化分析,初步划分出了6个层序,识别出若干个沉积体系域和层序界面。盆地沉积演化与构造体制、区域性构造运动密切相关,构造活动控制了海平面变化。近几年来,在南郑马元一带震旦系灯影组白云岩中,发现了近百千米的"马元型"铅锌矿带,因此,通过区域地层格架分析和层序地层学研究,进一步研究区域构造活动历史,恢复海平面变化细节,建立岩石地层格架,从微观上准确了解区域海平面敏感变化,从而更好地预测沉积矿产。A group of early Paleozoic-Mesozoic carbonate rocks intercalated with clastic rocks with clear structure and lithofacies was deposited in Nanzheng-Yangpingguan Paleozoic sedimentary basin of south Qinling Mountains,lying at the northern passive edge of Yangtze Platform.On the basis of stratigraphic features and lateral change,6 sequences as well as some depositional boundaries and tracts were recognized.The evolution of the sedimentary basin was closely related to tectonic regime and regional tectonic movement,and the tectonic movements dominated the sea-level change.In recent years,＂Mayuan-type＂ lead-zinc metallogenic belt hundreds of kilometers in thickness was discovered in Sinian Dengying dolomite of Mayuan and Nanzheng.Therefore,it is of great significance to study the regional tectonic history,restore sea-level change and understand the regional sensitive sea-level changes through the analysis of the regional stratigraphic framework and sequence stratigraphy with the purpose of forecasting the mineral deposits better.

关 键 词：扬子地台北缘 沉积盆地 构造活动 海平面变化 马元铅锌矿 

分 类 号：P539.2[天文地球—古生物学与地层学]