本文關(guān)鍵詞： 碎屑流 濁流 流體轉(zhuǎn)化 過(guò)渡流體 混合流 混合事件層 深水重力流 成因機(jī)制　出處：《地學(xué)前緣》2017年03期 　論文類型：期刊論文

【摘要】：同一重力流事件形成的包含碎屑流和濁流及其之間過(guò)渡流體的混合流沉積形成的沉積層稱為混合事件層�；旌鲜录䦟又饕虏可百|(zhì)碎屑流-上部濁流混合事件層(類型1)和下部濁流-上部泥質(zhì)碎屑流混合事件層(類型2)以及泥質(zhì)碎屑流和濁流頻繁互層混合事件層(類型3)3種類型。類型1主要為流體轉(zhuǎn)化成因,包含液化作用、沉積物破碎、流體頂部剪切侵蝕、接觸面不穩(wěn)定性和波浪破碎、水力跳躍、流體頭部與環(huán)境水體混合和多種機(jī)制作用下的整體轉(zhuǎn)化7種成因認(rèn)識(shí)。類型2和類型3主要涉及流體轉(zhuǎn)化及流體差異搬運(yùn)和沉降過(guò)程成因,包含碎屑流覆蓋濁流、碎屑流內(nèi)部差異沉降、濁流侵蝕轉(zhuǎn)化、濁流膨脹減速、局部沉積物垮塌和浮力轉(zhuǎn)化6種成因認(rèn)識(shí)。下部砂質(zhì)碎屑流上部濁流混合事件層和下部濁流上部厚層富含泥質(zhì)碎屑的泥質(zhì)碎屑流混合事件層在沉積近端到沉積遠(yuǎn)端均有分布,多呈條帶狀或樹枝狀;下部濁流上部貧泥質(zhì)碎屑的泥質(zhì)碎屑流混合事件層主要在沉積遠(yuǎn)端或基底相對(duì)低部位分布,多呈環(huán)帶狀或牛眼狀。深水重力流混合事件層的分布主要受泥質(zhì)含量、顆粒粒度、水體密度等內(nèi)部因素和重力流成因機(jī)制、古地形和構(gòu)造活動(dòng)等外部因素綜合控制。深水重力流混合事件層的形成及其分布研究對(duì)于豐富和完善重力流沉積理論,指導(dǎo)現(xiàn)階段深水重力流砂體常規(guī)和非常規(guī)油氣勘探及理解自然活動(dòng)規(guī)律、防災(zāi)減災(zāi)具有重要意義。現(xiàn)階段對(duì)深水重力流混合事件層的多種成因及形成條件和橫向分布演化規(guī)律的研究還有待進(jìn)一步深入。
[Abstract]:The sedimentary layer formed by the same gravity flow event consisting of clastic flow and turbidity flow and the mixed flow deposition between them is called mixed event layer. The mixed event layer mainly contains the mixing between the lower sandy clastic flow and the upper turbidity flow. Component layer (. Type 1) and the mixing event layer (type 2) between the lower turbidity flow and the upper muddy clastic flow and the frequent mixing event layer between the muddy clastic flow and the turbidity stream (type 3). Type 1 is the main cause of fluid transformation. Contains liquefaction, sediment breakage, top shear erosion, contact instability and wave breakage, hydraulic jump. There are 7 kinds of causes of the whole transformation under the mixing of the fluid head and the environmental water body and under the action of various mechanisms. Type 2 and type 3 are mainly related to the causes of fluid transformation and fluid differential transport and settlement. Including clastic flow cover turbidity flow, clastic flow internal differential settlement, turbidite erosion transformation, turbidity flow expansion deceleration. Local sediment collapse and buoyancy transformation. Mixed event layer of turbidity flow in the upper part of the lower sand clastic flow and muddy clastic layer in the upper thick layer of the upper part of the lower turbidity stream from the proximal end of the deposit to the distant part of the deposit. The ends were distributed. More banded or dendritic; The mixed event layer of the muddy clastic flow in the upper part of the turbidity current is mainly distributed in the distal part of the deposit or in the lower part of the basement. The distribution of mixed event layer of deep water gravity flow is mainly due to internal factors such as mud content particle size water body density and the formation mechanism of gravity flow. The study on the formation and distribution of mixed event layer of deep water gravity flow is helpful to enrich and perfect the theory of gravity flow deposition. To guide conventional and unconventional oil and gas exploration and understanding of natural activities of deep water gravity quicksand bodies at this stage. It is of great significance to prevent and reduce disaster prevention and mitigation. At present, the study on the formation conditions and lateral distribution and evolution of the mixed event layer of deep water gravity flow needs to be further deepened.
【作者單位】： 中國(guó)石油大學(xué)(華東)地球科學(xué)與技術(shù)學(xué)院;海洋國(guó)家實(shí)驗(yàn)室海洋礦產(chǎn)資源評(píng)價(jià)與探測(cè)技術(shù)功能實(shí)驗(yàn)室;
【基金】：國(guó)家科技重大專項(xiàng)(2011ZX05009-003) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(14CX06070A)
【分類號(hào)】：P618.13
【正文快照】： 操應(yīng)長(zhǎng)1,2,楊田1,*,王艷忠1,張少敏1,王思佳1,張青青1,王心懌11.中國(guó)石油大學(xué)(華東)地球科學(xué)與技術(shù)學(xué)院,山東青島2665802.海洋國(guó)家實(shí)驗(yàn)室海洋礦產(chǎn)資源評(píng)價(jià)與探測(cè)技術(shù)功能實(shí)驗(yàn)室,山東青島266071CAO Yingchang1,2,YANG Tian1,*,WANG Yanzhong1,ZHANG Shaomin1,WANG Sijia1,ZHANG

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