CAJ | 학술논문

雪峰山中段基性岩锆石SHRIMP U-Pb测年结果表明雪峰山地区存在多期基性岩。在黔阳(安江)地区发现了的晚三叠世和新元古代的基性岩。在所测的三个不同地区的样品中，发现了一些新太古代-古元古代、中元古代、新元古代以及中生代(印支运动)构造热事件信息，但缺少典型Rodinia超大陆聚合信息。早期的基性岩中锆石成分比较复杂，有很多来自基底的捕获锆石，随着时代的变新，来自基底的信息逐渐减少甚至没有。黔阳地区的基性岩及其时代研究表明：(1)桃江-安化-黔阳-溆浦-靖州断裂是雪峰山的中央断裂，它有多期活动历史，并控制了不同阶段的基性-超基性岩的产出；(2)晚三叠世的基性岩在雪峰山中央断裂左行走滑拉分区域形成，不代表裂谷或碰撞后伸展环境；(3)扬子板块东南缘存在新太古代-古元古代基底。
설봉산중단기성암고석SHRIMP U-Pb측년결과표명설봉산지구존재다기기성암。재검양(안강)지구발현료적만삼첩세화신원고대적기성암。재소측적삼개불동지구적양품중，발현료일사신태고대-고원고대、중원고대、신원고대이급중생대(인지운동)구조열사건신식，단결소전형Rodinia초대륙취합신식。조기적기성암중고석성분비교복잡，유흔다래자기저적포획고석，수착시대적변신，래자기저적신식축점감소심지몰유。검양지구적기성암급기시대연구표명：(1)도강-안화-검양-서포-정주단렬시설봉산적중앙단렬，타유다기활동역사，병공제료불동계단적기성-초기성암적산출；(2)만삼첩세적기성암재설봉산중앙단렬좌행주활랍분구역형성，불대표렬곡혹팽당후신전배경；(3)양자판괴동남연존재신태고대-고원고대기저。
Zircon SHRIMP U-Pb dating results of the mafic rocks from the central Xuefengshan area showed that multi-stage mafic intrusions occurred in the study region. Late Triassic and Neoproterozoic mafic rocks have been reported in the Qianyang region (Anjiang). Tectonothermal events of the Neoarchean-Paleoproterozoic, Mid-Proterozoic, Neoproterozoic and Mesozoic have been recorded in the samples from three different areas in the Qianyang region, but there is no information concerning the aggregation of the Rodinia Supercontinent. The composition of zircons from the mafic rocks of the early stages are more complicated, many zircon grains were captured from the basement of the Yangtze Plate, however, fewer zircons from the basement have been found in the younger mafic rocks. The occurrence of multi-stage mafic rocks in the Qianyang region shows that (1) the Taojiang-Anhua-Qianyang-Xupu-Jingzhou Fault is the Central Fault Zone in Xuefengshan. It had a long and complex history and controlled the occurrence of the various stages mafic-ultramafic rocks;(2) Late Triassic mafic rocks in the Qianyang region occurred in the pull-apart region of the sinistral Taojiang-Anhua-Qianyang-Xupu-Jingzhou Fault of Xuefengshan, but they were not produced in the rifting valley or the post-collisional extension environment; (3) the Neoarchean-Paleoproterozoic basement may underlie the southeast margin of the Yangtze Plate.