辽北“辽河群”解体及其层位归属

THE “LIAOHE GROUP" IN NORTHERN LIAONING PROVINCE:DISINTEGRATION AND BELONGINGNESS

辽北“辽河群”极为复杂,对其划分方案存在诸多分岐.实际上辽北“辽河群”除由不同时代地层组成以外,尚包含少量二叠纪的超基性岩、花岗质糜棱岩、闪长质糜棱岩.笔者在野外研究的基础上,对辽北“辽河群”进行解体,原则上不另建新的地层单位,“是谁归谁”,共划分了新元古代红透山岩组、中元古代三岔子群、新元古代西保安岩组和奥陶纪下二台群4个地层单位.

The composition of the “Liaohe group” in Northern Liaoning have been put forwards on the di strata with various ages, but also of field survey and study, th stratigraphic unit is establis formation, Mesoproterozoic vision of the strata. In fact, the “Liao Province is so complex that quite different plans he group” in Northern Liaoning contains not only a little Permain ultrabasic rocks, granitic mylionite and e authors hed, the disintegrated the “Liaohe group” in Northern Liaonin strata are divided and incorporated respectively into N dioritic mylionite. On the basis g. On the principle that no new eoproterozoic Hongtoushan rock Sanchazi group, Neoproterozoic Xibaoan rock formation and Ordovician Xiaertai group