Paleomagnetic Study of the Devonian System in Tarim Basin, China
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摘要: 塔里木古地磁资料表明泥盆纪期间西南缘的古纬度低于西北缘(约12°),前者是在泥盆纪～石炭纪期间塔里木地块快速北移的过程中才在石炭纪与后者拼接在一起的。次级构造单元之间的这种差异运动对塔里木西部的构造演化与油气资源评价都具有重要意义。Abstract: Based on results from 41 oriented cores collected from northwestern and southwestern margins of the Tarim Basin, this paper presents a brief introduction of our recent study on the Devonian System therein. Paleomagnetic data suggest that paleolatitude of the southwestern margin was much lower than that of the norhwestern margin (about 12°). The former was amalgamated to the later during rapid northward drifting of the Tarim Block happening within Carbono-Devonian period. This kind of differential motions among sub -units of the block should be a significant element on tectonic evolution and evaluation of oil and gas within the western part of the Tarim Basin.
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