本文關(guān)鍵詞：珠江口盆地珠二坳陷文昌組構(gòu)造差異性與動力學(xué)成因機制　出處：《地學(xué)前緣》2017年06期 　論文類型：期刊論文

  更多相關(guān)文章： 珠江口盆地 珠二坳陷 構(gòu)造差異 動力學(xué)

【摘要】：通過統(tǒng)計珠二坳陷主要基底斷層的要素特征,并計算典型斷層的活動速率,系統(tǒng)地研究了文昌組沉積期研究區(qū)構(gòu)造差異性,探討了差異構(gòu)造的動力學(xué)成因機制。結(jié)果表明陽江—一統(tǒng)暗沙東斷裂帶控制研究區(qū)西部開平—順德凹陷和東部白云凹陷的構(gòu)造差異性,主要表現(xiàn)在前新生代構(gòu)造環(huán)境、新生代基底斷裂走向、文昌組斷層活動性和凹陷結(jié)構(gòu)等方面。開平凹陷北側(cè)和白云凹陷南側(cè)控凹邊界斷層在新生代早期可能屬于同一條初始斷裂帶。研究區(qū)東西部前新生代不同的巖石圈結(jié)構(gòu)導(dǎo)致了文昌組構(gòu)造動力學(xué)成因機制迥異:西部開平—順德凹陷中生代處于火山弧區(qū),較厚的上部地殼高度脆性破裂同時被大量沉積物充填,形成北斷南超型窄半地塹結(jié)構(gòu);東部白云凹陷中生代位于弧前區(qū),地殼韌性變形較強,文昌組沉積物源相對不足,形成南斷北超型寬半地塹結(jié)構(gòu)。云開低凸起作為構(gòu)造調(diào)節(jié)帶,對其兩側(cè)的差異性構(gòu)造變形具有調(diào)節(jié)作用。
[Abstract]:Through the statistical features of two beads depression mainly basement faults, and calculate the typical fault activity rate, systematic study of the Wenchang formation of tectonic difference, discusses the dynamic mechanism between structures. The results show that the Yangjiang East yitongansha fault zone control research area of Western Kaiping - Shunde depression tectonic depression and the eastern clouds, mainly in the tectonic environment of the Cenozoic, to the Cenozoic basement fault, Wenchang fault depression group activity and structure. Kaiping sag north and south of the Baiyun Sag depression controlled boundary faults in the early Cenozoic may belong to the same initial fault zone. The lithosphere structure study area east before the new generation of different leads to different tectonic dynamic mechanism: Wenchang group in Western Kaiping - Shunde depression in Mesozoic volcano arc area, thick high degree of brittle upper crust At the same time of rupture by a large number of sediment filling, the formation of the North South fault type super narrow half graben structure; the eastern Baiyun sag is located in the area before the Mesozoic arc crust, ductile deformation is strong, the relative lack of sediment sources in Wenchang group, the formation of super wide north South fault type half graben structure. As the Yunkai low uplift tectonic transfer zones, structural differences on the on both sides of the deformation has a regulatory role.

【作者單位】： 中海油研究總院;
【基金】：“十三五”國家科技重大專項“南海深水區(qū)油氣資源潛力與大中型油氣田勘探方向”(2016ZX05026-007)
【分類號】：P618.13
【正文快照】： 珠江口盆地是南海北部陸緣新生代被動裂谷盆地之一,北部陸架淺水區(qū)珠一坳陷和珠三坳陷的油氣勘探程度較高,鉆井已證實始新統(tǒng)文昌組中深湖相和漸新統(tǒng)恩平組煤系為主力烴源巖[1]。預(yù)測南部陸坡深水區(qū)珠二坳陷發(fā)育三套烴源巖,其中,鉆井已證實恩平組海陸過渡相煤系和珠海組海相泥，

本文編號：1382821