化工矿产地质
化工礦產地質
화공광산지질
GEOLOGY OF CHEMICAL MINERALS
2014年
4期
193-200
,共8页
卢崇海%张耀华%奚锐%李季%关树野%张爽%邢德和%谢鑫竹
盧崇海%張耀華%奚銳%李季%關樹野%張爽%邢德和%謝鑫竹
로숭해%장요화%해예%리계%관수야%장상%형덕화%사흠죽
鞍本-抚顺%含铁建造%层序对比%形成时代%构造岩石单位厘定
鞍本-撫順%含鐵建造%層序對比%形成時代%構造巖石單位釐定
안본-무순%함철건조%층서대비%형성시대%구조암석단위전정
Anshan-Benxi-Fushun%iron formation%sequence comparison%formation era%determination of tectonic rock unit
辽宁鞍本-抚顺地区太古宙变质层状岩系,前人分别建立了太古宙鞍山群井家沟组、石棚子组、通什村组、红透山组、樱桃园组、大峪沟组和茨沟组等地层单位,这些地层单位均呈规模大小不等的包体状、孤岛状等形态赋存于太古宙变质深成岩中,各组之间大部分孤立存在,无底无顶,相互间接触关系不清,是否属于同一时期形成的产物,长期一来存在着较多的争议。通过对各岩组原岩恢复、层序对比、含铁建造、变质作用等特点和以往及近期获得高精度测年数据的分析研究,把辽宁鞍本-抚顺地区太古宙层状岩系厘定为新太古代井家沟岩组、红透山岩组、茨沟岩组和樱桃园岩组等四个构造岩石地层单位,形成时间在27~25亿a左右,为新太古代中晚期产物。
遼寧鞍本-撫順地區太古宙變質層狀巖繫,前人分彆建立瞭太古宙鞍山群井傢溝組、石棚子組、通什村組、紅透山組、櫻桃園組、大峪溝組和茨溝組等地層單位,這些地層單位均呈規模大小不等的包體狀、孤島狀等形態賦存于太古宙變質深成巖中,各組之間大部分孤立存在,無底無頂,相互間接觸關繫不清,是否屬于同一時期形成的產物,長期一來存在著較多的爭議。通過對各巖組原巖恢複、層序對比、含鐵建造、變質作用等特點和以往及近期穫得高精度測年數據的分析研究,把遼寧鞍本-撫順地區太古宙層狀巖繫釐定為新太古代井傢溝巖組、紅透山巖組、茨溝巖組和櫻桃園巖組等四箇構造巖石地層單位,形成時間在27~25億a左右,為新太古代中晚期產物。
료녕안본-무순지구태고주변질층상암계,전인분별건립료태고주안산군정가구조、석붕자조、통십촌조、홍투산조、앵도완조、대욕구조화자구조등지층단위,저사지층단위균정규모대소불등적포체상、고도상등형태부존우태고주변질심성암중,각조지간대부분고립존재,무저무정,상호간접촉관계불청,시부속우동일시기형성적산물,장기일래존재착교다적쟁의。통과대각암조원암회복、층서대비、함철건조、변질작용등특점화이왕급근기획득고정도측년수거적분석연구,파료녕안본-무순지구태고주층상암계전정위신태고대정가구암조、홍투산암조、자구암조화앵도완암조등사개구조암석지층단위,형성시간재27~25억a좌우,위신태고대중만기산물。
In the Archaean metaporphic layering rock series in Liaoning Anshan-Benxi-Fushun area, many lithostratigraphic units have been established including Archaean Anshan group Jingjiagou group, Shipengzi group, Tongshicun group, Hongtoushan group, Yingtaoyuan group, Dayugou group and Cigou group, ets. However, many enclaves and island-shaped lithostratigraphic units of various sizes exist in Archaean metamorphic plutonic rocks. They exist in isolation, with no bottom and cap, no clear contact area. There has been existing many controversies about whether they belong to the same period of products. Through restoration of original rocks, sequence comparison to every group, iron formation characters and research on high precision dating data obtained in recent and the past years, this article sets four lithostratigraphic units in the Archaean metaporphic layering rock series in Liaoning Anshan-Benxi-Fushun area, which are Neoarchaean Jingjiagou group, Hongtoushan group, Cigou group and Yingtaoyuan group. The forming time is 2.7~2.5 billion years ago, which belongs to late-mid-Neoarchaean period.