CAJ | 학술논문

利用地球化学测试资料，依据大地构造学理论，对大煤沟剖面石灰沟组碎屑岩物源区性质及构造属性进行研究。结果表明：石灰沟组砂岩具有中等风化、快速堆积的特点，碎屑物质来源于上地壳酸性岩类，形成于活动大陆边缘构造背景；早奥陶世晚期，碎屑物质来自南侧滩间山陆-弧碰撞带的复理石向北的远端超覆，造成欧龙布鲁克微地块南缘大煤沟-城墙沟一带发生沉积岩、沉积相类型乃至沉积体系的转换；研究区不晚于488~471 Ma进入陆-弧碰撞阶段，寒武纪-早奥陶世，欧龙布鲁克海盆处于弧后位置，并非是被动大陆边缘盆地，而是与洋陆俯冲陆-弧碰撞有关的弧后盆地。
이용지구화학측시자료，의거대지구조학이론，대대매구부면석회구조쇄설암물원구성질급구조속성진행연구。결과표명：석회구조사암구유중등풍화、쾌속퇴적적특점，쇄설물질래원우상지각산성암류，형성우활동대륙변연구조배경；조오도세만기，쇄설물질래자남측탄간산륙-호팽당대적복리석향북적원단초복，조성구룡포로극미지괴남연대매구-성장구일대발생침적암、침적상류형내지침적체계적전환；연구구불만우488~471 Ma진입륙-호팽당계단，한무기-조오도세，구룡포로극해분처우호후위치，병비시피동대륙변연분지，이시여양륙부충륙-호팽당유관적호후분지。
Using the geochemistry data, provenance property and structural attributes of Shihuigou formation clastic rocks from Dameigou outcrop were studied under the guidance of the sedimentary geotectonic theories. The results indicate that the provenance of the Shihuigou Formation with characteristics of moderately weathered and rapid accumulation is the upper crust acidic rocks, deposited in the active continental margin tectonic setting. From the early period of Early Ordovician, detrital material from Tanjianshan arc-continental collision zone distal overlapped from the south to the north, leading to the transition of sedimentary petrology types,sedimentary facie types and sedimentary system;By 488-471 Ma, the study area had entered into the stage of continental-arc collision period;During the Cambrian to Early Ordovician period, the Oulongbuluke sea ba-sin was located in the back-arc position, which is not a passive continental margin basin, but a back-arc basin related to the subduction-arc collision.