【作者】 李浩；

【导师】 邓军； 梅冥相；

【作者基本信息】 中国地质大学（北京） ， 矿物学、岩石学、矿床学， 2005， 博士

【摘要】 滇黔桂地区包括滇东南、黔南和广西大部。从寒武纪至泥盆纪,由于受到加里东运动的强烈影响,滇黔桂地区经历了复杂的构造古地理演变。该演变过程受制于寒武纪末期的郁南运动、中奥陶世末期的都匀运动以及志留纪末期的广西运动,它们分别隶属于加里东运动第一幕至第三幕。震旦纪与寒武纪之交的快速海侵事件之后,研究区为大片海域,同时发育大片分布的下寒武统烃源岩系。寒武纪末期的郁南运动所造成的地壳抬升,在研究区域的中心地带于早、中奥陶世形成了滇黔桂古陆的雏形;中奥陶世末期的都匀运动,在晚奥陶世至志留纪早期使研究区域总体上升成陆,形成了习称的“滇黔桂古陆”。志留纪时期从北而南的海侵,造成了“滇黔桂古陆”的部分解体,但未改变大片古陆分布的现状;志留纪末期的广西运动,又使研究区域成为大片古陆。早古生代三次构造运动所造成的地壳抬升的结果,导致上奥陶统与志留系由北而南的海侵尖灭,以及研究区域残留不全的奥陶系与志留系,和复杂的加里东运动不整合面。泥盆纪洛赫考夫期至布拉格期由南而北的慢速海侵作用,形成一套较厚的海侵砂岩系,该砂岩系直接覆盖在寒武纪至志留纪不同时代的地层之上。埃姆斯期大幅度海侵事件,在研究区域的主体部位形成一个特殊的沉积盆地--滇黔桂盆地,该沉积盆地以“台—盆—丘—槽”的格局为特征。在较为完整的泥盆纪中,可以识别出13 个三级层序,而且在那些被称作台盆的深水环境中,发育了中泥盆统优质烃源岩系。在研究区域两套优质烃源岩的空间叠合区域,加里东运动不整合面之下的寒武系中、上统白云岩储集体以及不整合面之上的泥盆系下部的海侵砂岩系则构成较有潜力的储集层,它们所形成的若干类型的成藏模式,表明滇黔桂地区具有重要的深层油气勘探潜力。再者,泥盆系内部的隐伏生物礁以及三级层序晚期高水位体系域中的白云岩储集体,常被台盆相泥页岩构成的烃源岩系包裹,形成特定的生储盖组合,从而成为研究区域又一重要的油气勘探领域。更多还原

【Abstract】 Strongly controlled by the Coledonian movement, the study area, i.e. the Yunnan-Guizhou-Guangxi area, has undergone a complex evolution of tectonic-palaeogeographic process from the Cambrian to the Devonian. This complex process is resulted from the crust uplift generated by tectonic movement, that is, the Yunan movement occurred at the turn from the Cambrian to the Ordovician, the Duyun movement occurred at the turn from the middle to late Ordovician and the Guangxi movement occurred at the turn from the Silurian to the Devonian. These tectonic movements belong to the first to the third episodes of the Coledonian movement respectively. After a rapid transgression at the transitional period from the Sinian to the Cambrian, the study area became a great sea. As a result of this great-sea setting, the lower-Cambrian source rock that widespread distribute in the study area was formed. The crust uplift caused by the Yunan movement at the turn from the Cambrian to the Ordovician led to an incipient shape of the Dianqiangui oldland in the central part of the study area. The study area became a great oldland after the Duyun movement in the end of the middle Ordovician; therefore, the Dianqiangui oldland was formed from the late Ordovician to the early period of the Silurian. Although the southward transgression in the Silurian had partly disintegrated the Dianqiangui oldland, the distributional situation both land and sea in the study area had not undergone a great change. Resulted from the Guangxi movement occurred in the end of the Silunian, the study area became a great oldland again in the late period of Silunian. Ultimately, the results of these three tectonic movements are the southward dieing out of the upper Ordovician and the Silunian strata, the partly development both the Ordovician and the Silunian strata and a complex unconformity of the Coledonian movement in the study area. The northward slow transgression in the Lochkovian and the Pragian of the Devonian formed a set of transgressive sandstone system. This set of transgressive sandstone system direct covers on the strata from the Cambrian to the Silunian. After the Emsian large-range transgressive event, a particular sedimentary basin, i.e. the Dianqiangui Basin marked by a setting of “platform-basin-hill-trough”was formed in the study area. The Devonian System in the Dianqiangui Basin can be grouped into 13 third-order sequences. Beside the lower-Cambrian source rock, another set of good-quality source rock of the middle Devonian was formed in the starve-basin更多还原