【摘要】：如何深入了解中國東部北黃海盆地東部坳陷巖漿活動特征是目前研究的前沿之一.為探討早白堊世異常劇烈?guī)r漿活動的區(qū)域構(gòu)造成因并揭示中國東部的構(gòu)造動力學(xué)機制,利用井-震及巖漿巖測試資料,對北黃海盆地巖漿活動特征及其與區(qū)域構(gòu)造的耦合關(guān)系進(jìn)行研究.在空間上刻畫了巖漿的侵入相、噴出相的地震反射特征及沿深大斷裂展布的平面分布特征;在時間上劃分出了包括早白堊世108~115Ma、134~145Ma在內(nèi)的4期巖漿活動.結(jié)合區(qū)域地質(zhì)分析認(rèn)為早白堊世早期,伊澤奈琦板塊沿北北西斜向俯沖于歐亞板塊之下,太平洋板塊向南西方向俯沖,板塊剪切作用導(dǎo)致郯廬斷裂帶左旋走滑,使得盆地處于左旋伸展環(huán)境中,內(nèi)部形成派生的北西向右旋、近南北向左旋的次級共軛斷裂系并控制巖漿上侵底辟活動.經(jīng)過綜合分析,厘清了盆地巖漿活動及斷裂演化過程與區(qū)域板塊運動之間的耦合關(guān)系.
[Abstract]:How to deeply understand the characteristics of magmatic activity in the eastern depression of the northern Huang Hai basin in eastern China is one of the frontier studies at present. In order to study the regional tectonic genesis of the anomalous magmatic activity in early Cretaceous and to reveal the tectonic dynamic mechanism of eastern China, well-earthquake and magmatic rock testing data were used. The characteristics of magmatic activity and its coupling with regional tectonics in the northern Huang Hai basin are studied. In space, the intrusive facies of magma, the seismic reflection characteristics of the ejection facies and the plane distribution along the deep fault are characterized, and the four periods of magmatic activity, including the early Cretaceous 108-115Ma-134Ma, are divided into four periods. Combined with regional geological analysis, it is concluded that in the early Cretaceous, the Yizenaiqi plate subducted under the Eurasian plate along the north-northwest oblique direction, the Pacific plate subducted southwestward, and the plate shear resulted in the left-lateral strike-slip of the Tanlu fault zone. The basin is in a left-lateral extensional environment and forms a derived north-west right-handed subconjugate fault system near the south-north direction and controls magmatic diapir activity. Through comprehensive analysis, the coupling relationship between magmatic activity and fault evolution process and regional plate movement in the basin is clarified.
【作者單位】： 中國地質(zhì)大學(xué)資源學(xué)院;中國地質(zhì)大學(xué)構(gòu)造與油氣資源教育部重點實驗室;中石化重慶涪陵頁巖氣勘探開發(fā)有限公司;
【基金】：國家十三五油氣重大子課題(No.2016ZX05025002-003) 國家基礎(chǔ)地質(zhì)調(diào)查項目(No.12120114055801) 111引智項目(No.B14031)
【分類號】：P736

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