CAJ | 학술논문

河北宽城地区蓟县系洪水庄组主要为一套碳酸盐岩潮坪相沉积,厚度101.66m,下部由灰黑色页岩与中层-薄层状泥质白云岩互层组成,向上泥质白云岩不发育,以灰黑色页岩为主,含黄铁矿结核；上部由含粉砂泥质页状白云岩与含砂白云岩及含锰泥晶白云岩组成。该套地层岩石类型主要为白云岩和页岩,白云岩可进一步划分为硅质白云岩、(含粉砂)泥质(砂质)白云岩、(含锰)泥晶白云岩,页岩则由硅质页岩和暗色页岩组成。根据岩石学特征及沉积构造等相标志,将研究区洪水庄组划分为潮上带、潮间带(上、下)和潮下带(上、下)3种沉积环境。洪水庄组有机质富集,以大量藻类体和腐泥质碎屑为主,为很好的烃源岩,与上覆蓟县系铁岭组、青白口系下马岭组构成有利的生储盖配置,具有良好的油气勘探潜力。
하북관성지구계현계홍수장조주요위일투탄산염암조평상침적,후도101.66m,하부유회흑색혈암여중층-박층상니질백운암호층조성,향상니질백운암불발육,이회흑색혈암위주,함황철광결핵；상부유함분사니질혈상백운암여함사백운암급함맹니정백운암조성。해투지층암석류형주요위백운암화혈암,백운암가진일보화분위규질백운암、(함분사)니질(사질)백운암、(함맹)니정백운암,혈암칙유규질혈암화암색혈암조성。근거암석학특정급침적구조등상표지,장연구구홍수장조화분위조상대、조간대(상、하)화조하대(상、하)3충침적배경。홍수장조유궤질부집,이대량조류체화부니질쇄설위주,위흔호적경원암,여상복계현계철령조、청백구계하마령조구성유리적생저개배치,구유량호적유기감탐잠력。
The carbonate tidal-flat deposits in the Jixianian Hongshuizhuang Formation in the Kuancheng region, Hebei are made up of dominant grayish black shales with pyrite nodules and medium- to thin-bedded muddy dolostones in the lower part, and the silt-bearing muddy laminated dolostones, sand-bearing dolostones and manganese-bearing micritic dolostones in the upper part of the measured section in this study. This succession of strata consists dominantly of dolostones and shales. The former may be subdivided into siliceous dolostones, ( silt-bearing) muddy ( sandy ) dolostones, and ( manganese-bearing ) micritic dolostones while the latter comprise siliceous shales and dark shales. Three types of sedimentary environments are identified, including supratidal, intertidal ( upper and lower ) and subtidal ( upper and lower ) zones on the basis of petrological features and sedimentary structures. The Hongshuizhuang Formation oppears as organic matler-rich ( algae and sapropelic fragments) excellent source rocks, and constitutes the favourable source-reservoir-seal disposition together with the overlying Jixianian Tieling Formation and Qingbaikouan Xiamaling Formation, which must be considered highly prospective for the petroleum exploration.