1研究目的辽宁大连地区位于华北克拉通的东北缘(Zhao Guochun et al., 2012),这里中-新元古代地层发育,自下而上分别为永宁群、细河群、五行山群和金县群,其中永宁群和细河群是一套碎屑岩沉积组合,永宁群包含永宁组,细河群包含钓鱼台组...1研究目的辽宁大连地区位于华北克拉通的东北缘(Zhao Guochun et al., 2012),这里中-新元古代地层发育,自下而上分别为永宁群、细河群、五行山群和金县群,其中永宁群和细河群是一套碎屑岩沉积组合,永宁群包含永宁组,细河群包含钓鱼台组、南芬组、桥头组。展开更多
金刚石俗称钻石,以其高硬度和稀缺性成为世界上最珍贵的矿物之一。金刚石矿床按成因可分为原生矿床与次生矿床两大类,原生矿床又可分为金伯利岩和钾镁煌斑岩型,蛇绿岩地幔橄榄岩和铬铁矿、碱性辉长辉绿岩、超高压变质岩、火山岩、陨石...金刚石俗称钻石,以其高硬度和稀缺性成为世界上最珍贵的矿物之一。金刚石矿床按成因可分为原生矿床与次生矿床两大类,原生矿床又可分为金伯利岩和钾镁煌斑岩型,蛇绿岩地幔橄榄岩和铬铁矿、碱性辉长辉绿岩、超高压变质岩、火山岩、陨石及其冲积相关的岩石中均有金刚石产出,但未形成矿床(路凤香等,1998;Cartigny,2005;Gurney et al.,2010)。次生矿床主要为砂矿床。其中原生金伯利岩型金刚石是世界上金刚石矿产的主要来源(Mitchell,1991;Gurney et al.,2005)。辽宁省瓦房店地区以盛产金伯利岩型原生金刚石闻名世界,尤以50号金伯利岩管金刚石品质最好,宝石级约占70%,质量属于世界一流(任厚民,1992;宋瑞祥,2013)。展开更多
1研究目的辽宁东部地区位于华北克拉通的东北缘(Zhao Guochun et al.,2012)。该地区中元古代晚期—新元古代早期地层发育,层序保存完整且出露较好,是研究华北克拉通中、新元古界的关键地区之一。桥头组分布于辽宁东部的本溪、辽阳、丹...1研究目的辽宁东部地区位于华北克拉通的东北缘(Zhao Guochun et al.,2012)。该地区中元古代晚期—新元古代早期地层发育,层序保存完整且出露较好,是研究华北克拉通中、新元古界的关键地区之一。桥头组分布于辽宁东部的本溪、辽阳、丹东、大连等地区,曾被认为形成于新元古代晚期南华纪(辽宁省地质勘查院,2017)。近些年随着同位素测年技术的广泛应用,桥头组形成于中元古代晚期—新元古代早期的观点被广泛认可(Zhang Wen et al.,2020,2021;Zhao Hanqing et al.,2020),但目前针对桥头组的研究大多集中在物源分析及其对华北克拉通古地理重建等方面(Zhang Shuahong et al.,2016;He Tianchen et al.,2016;Zhang Wen et al.,2020,2021;Zhao Hanqing et al.,2020),少量文献则根据岩石学、矿物学、地球化学等传统地质方法对桥头组的古气候进行研究(曲洪祥等,2011;田德欣等,2018;吴子杰等,2020),但并未形成统一的认识。展开更多
Objective The Jehol biota refers to a flora and fauna that thrived in the Early Cretaceous (Shao Tiequan et al., 2017), and Eosestheria is an important component of the Jehol biota and is also an important link in the...Objective The Jehol biota refers to a flora and fauna that thrived in the Early Cretaceous (Shao Tiequan et al., 2017), and Eosestheria is an important component of the Jehol biota and is also an important link in the biota chain during its production period.展开更多
Objective The Mesozoic strata in eastern Liaoning and southern Jilin are relatively well developed. Liu et al.(1963) studied Lycoptera in North China, and they mentioned the fossils of south Jilin, but they were not i...Objective The Mesozoic strata in eastern Liaoning and southern Jilin are relatively well developed. Liu et al.(1963) studied Lycoptera in North China, and they mentioned the fossils of south Jilin, but they were not included in the study due to the lack of specimens and poor preservation. Ma and Sun(1988) studied fish fossils from the Sankeyushu section in Tonghua, Jilin, and laid the foundation for the study of fish fossils in this area.展开更多
文摘金刚石俗称钻石,以其高硬度和稀缺性成为世界上最珍贵的矿物之一。金刚石矿床按成因可分为原生矿床与次生矿床两大类,原生矿床又可分为金伯利岩和钾镁煌斑岩型,蛇绿岩地幔橄榄岩和铬铁矿、碱性辉长辉绿岩、超高压变质岩、火山岩、陨石及其冲积相关的岩石中均有金刚石产出,但未形成矿床(路凤香等,1998;Cartigny,2005;Gurney et al.,2010)。次生矿床主要为砂矿床。其中原生金伯利岩型金刚石是世界上金刚石矿产的主要来源(Mitchell,1991;Gurney et al.,2005)。辽宁省瓦房店地区以盛产金伯利岩型原生金刚石闻名世界,尤以50号金伯利岩管金刚石品质最好,宝石级约占70%,质量属于世界一流(任厚民,1992;宋瑞祥,2013)。
文摘1研究目的辽宁东部地区位于华北克拉通的东北缘(Zhao Guochun et al.,2012)。该地区中元古代晚期—新元古代早期地层发育,层序保存完整且出露较好,是研究华北克拉通中、新元古界的关键地区之一。桥头组分布于辽宁东部的本溪、辽阳、丹东、大连等地区,曾被认为形成于新元古代晚期南华纪(辽宁省地质勘查院,2017)。近些年随着同位素测年技术的广泛应用,桥头组形成于中元古代晚期—新元古代早期的观点被广泛认可(Zhang Wen et al.,2020,2021;Zhao Hanqing et al.,2020),但目前针对桥头组的研究大多集中在物源分析及其对华北克拉通古地理重建等方面(Zhang Shuahong et al.,2016;He Tianchen et al.,2016;Zhang Wen et al.,2020,2021;Zhao Hanqing et al.,2020),少量文献则根据岩石学、矿物学、地球化学等传统地质方法对桥头组的古气候进行研究(曲洪祥等,2011;田德欣等,2018;吴子杰等,2020),但并未形成统一的认识。
基金Funding was provided by the sub-project of "Geological and Mineral Survey Project of the Metallogenic Belt of Eastern Liaodong and Southern Jilin" of China Geological Survey (grant No. 1212011120733)
文摘Objective The Jehol biota refers to a flora and fauna that thrived in the Early Cretaceous (Shao Tiequan et al., 2017), and Eosestheria is an important component of the Jehol biota and is also an important link in the biota chain during its production period.
基金provided by the sub-project of the China Geological Survey(Grant No.WKZB1911BJM300260)。
文摘Objective The Mesozoic strata in eastern Liaoning and southern Jilin are relatively well developed. Liu et al.(1963) studied Lycoptera in North China, and they mentioned the fossils of south Jilin, but they were not included in the study due to the lack of specimens and poor preservation. Ma and Sun(1988) studied fish fossils from the Sankeyushu section in Tonghua, Jilin, and laid the foundation for the study of fish fossils in this area.
