Igneous complexes in the eastern Northern South Yellow Sea Basin and their implications for hydrocarbon systems
Igneous complexes in the eastern Northern South Yellow Sea Basin and their implications for hydrocarbon systems
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DOI：
10.1016/j.marpetgeo.2006.06.001
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发表时间：
2006-07
影响因子：
4.2
通讯作者：
G. Lee;Young-ihn Kwon;C. S. Yoon;Han‐joon Kim;H. Yoo
中科院分区：
文献类型：
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作者：
G. Lee;Young-ihn Kwon;C. S. Yoon;Han‐joon Kim;H. Yoo
南黄海盆地北方东部的多道地震反射数据识别出各种火成岩和相关特征，如岩株、岩盖、岩床、岩脉、火山机构和热液喷口系统。这些岩株是高大的垂直侵入岩，其特征是具有上翻的主岩和隆起的覆盖层的地震死区。这些岩盖形成了宽而浅的土丘，边缘逐渐变细。窗台被成像为具有明显横向范围的一致的高振幅反射。岩脉的特征是陡斜、横切反射。在浅的侵蚀基底顶部观察到的火山建筑物由土丘和峰组成，可能代表火山和/或其残余（或颈）。热液喷口系统包括一个浅的火山口状喷口、一个垂直管道（看起来像地震烟囱）和更深的岩床。岩株和岩盖体可以提供类似于盐底辟的油气圈闭。岩墙注入倾斜或变形地层，可形成断层状圈闭。岩床可以形成封闭，也可以通过高热和隔热作用提高烃源岩的成熟度。火山机构，如果风化和/或断裂，可以提供水库。热液喷口可形成流体迁移的集中通道。
Multi-channel seismic reflection data from the eastern Northern South Yellow Sea Basin identify various igneous and related features such as stocks, laccoliths, sills, dikes, volcanic edifices, and hydrothermal vent systems. The stocks are tall, vertical intrusives, characterized by a seismically dead zone with upturned host rocks and uplifted overburden. The laccoliths form broad, low-relief mounds with tapering edges. The sills are imaged as concordant, high-amplitude reflections with a distinct lateral extent. The dikes are characterized by steeply inclined, cross-cutting reflections. The volcanic edifices, observed on the top of the shallow, eroded basement, consist of mounds and peaks, probably representing volcanoes and/or their remnants (or necks). The hydrothermal vent systems consist of a shallow crater-like vent, a vertical conduit that appears as a seismic chimney, and deeper sills. The stocks and the laccoliths can provide hydrocarbon traps similar to those associated with salt diapirs. The dikes, if injected into tilted or deformed strata, can form fault-like traps. The sills may form seals and also enhance the maturation of source rocks by high heat and insulation. The volcanic edifices, if weathered and/or fractured, can provide reservoirs. The hydrothermal vents may form focused conduits for fluid migration.