塔里木地区寒武纪早期海陆格局
Oceanic and continental framework of Early Cambrian period in Tarim area
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摘要: 提要：寒武纪早期（基本相当于纽芬兰世和第二世）是塔里木地区海相烃源岩层的重要沉积期。对这一时期塔里木地区海陆格局的研究将有助于其海相油气资源潜力的评价。本文在前人研究的基础上，野外调查和收集分析地质露头剖面13条、钻井柱状剖面10条，并参考部分地震剖面资料，构建了塔里木地区寒武纪早期海陆环境格局，编制了海陆格局与构造-沉积环境图。在研究结果中，明确了铁门关一带的微陆块性质，并认为它与北库鲁克塔格台地同属塔里木北部被动陆缘；在塔里木陆表海盆地内，依据新的资料，划分了不同沉积环境区。Abstract: Abstract：The Early Cambrian（corresponding to Terreneuvian and Series 2）is an important sedimentary period of marine source rocks in Tarim area．Researches on the framework of ocean and continent in Tarim area will help estimate the potential resources of the rocks．Based on previous studies，the authors investigated and analyzed 13 outcrops and 10 borehole sections，and consulted some seismic sections．By means of an analysis of stratigraphic and petrologic characteristics，the map for oceanic and continental framework and tectonic-sedimentary environment of Tarim area was compiled．It is pointed out that the area around Tiemenguan was a micro-landmass．The authors consider that both Tiemenguan micro-landmass and North Kuluketage underwater platform belonged to North Tarim passive continental margin．Furthermore，the authors divided the Tarim epeiric sea basin into different sedimentary environment areas on the basis of new data．
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