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陕西太白地区秦岭岩群中发育的十字石+蓝晶石+石榴石和夕线石+红柱石+石榴石+十字石两期矿物共生组合中独居石包裹体的电子探针化学年龄分别为(520±23)和(435±9)Ma.这表明,秦岭岩群在早寒武世发生过一期重要的变质作用.早寒武世变质作用可能是对晚泛非期俯冲增生构造热事件的响应.
The electronic probe chemical age of monazite inclusions in the symbiotic assemblages of the orthodontic rocks + sapphire + sapphire + andalusite + garnet + ± 23) and (435 ± 9) Ma, respectively, indicating that the Qinling Group had an important metamorphism in the Early Cambrian. The metamorphism of the Precaraba may be a tectonic event on the late Pan-African subduction tectonism response.