Abundant phosphatized acritarchs are preserved in the late Precambrian （Ediacaran） Doushantuo Formation at Weng＇an, Guizhou Province, southwest China. Most of them are large with various spinous ornaments and multi...Abundant phosphatized acritarchs are preserved in the late Precambrian （Ediacaran） Doushantuo Formation at Weng＇an, Guizhou Province, southwest China. Most of them are large with various spinous ornaments and multilayered outer walls. The general characters of these fossils are quite similar to those found from the homochronous deposits of the Yangtze Gorges, southern China. Therefore the Doushantuo Formation in the Weng＇an area can be correlated directly with the Doushantuo Formation of the Yangtze Gorges. Four species in four genera, including two new genera, two new species and one uncertain species are systematically described for the first time from the studied locality. The taxa are Bacatisphaera baokangensis Zhou, Brasier et Xue, 2001, Taeniosphaera doushantuoensis gen. et sp. nov., Rugospinasphaera speciosa gen. et sp. nov. and Meghystichosphaeridium sp. The new data enriches the famous Weng＇an biota, especially the marine microplankton flora in the Ediacaran Doushantuo Formation.展开更多
安图县新合研究区位于柴达木—华北板块(Ⅲ)、华北陆块北部陆缘造山带(ⅢA)、哈兰达岭—英额岭新元古代—古生代叠覆造山亚带(ⅢA 1)中部。处于Ⅲ55吉中—延边(活动陆缘)Mo Au As Cu Zn Fe Ni W成矿带内,成矿地质条件和找矿前景较好。通...安图县新合研究区位于柴达木—华北板块(Ⅲ)、华北陆块北部陆缘造山带(ⅢA)、哈兰达岭—英额岭新元古代—古生代叠覆造山亚带(ⅢA 1)中部。处于Ⅲ55吉中—延边(活动陆缘)Mo Au As Cu Zn Fe Ni W成矿带内,成矿地质条件和找矿前景较好。通过1∶1万土壤地球化学测量,对10种成矿元素进行地球化学参数特征分析,圈定综合异常13处,重点对Ht1、Ht2和Ht5异常特征进行综合分析。在此基础上,结合成矿地质条件和矿化蚀变特征,优选出找矿靶区2处。对B1号找矿靶区Au元素异常浓集中心进行工程验证,发现1条金矿化蚀变带,带内见5条金矿体,进一步证实本区具有较好的找矿前景。展开更多
基金funded by the National Natural Science Foundation of China(Grant No.440272015)the China Geological Survey(Grant No.200213000042).
文摘Abundant phosphatized acritarchs are preserved in the late Precambrian （Ediacaran） Doushantuo Formation at Weng＇an, Guizhou Province, southwest China. Most of them are large with various spinous ornaments and multilayered outer walls. The general characters of these fossils are quite similar to those found from the homochronous deposits of the Yangtze Gorges, southern China. Therefore the Doushantuo Formation in the Weng＇an area can be correlated directly with the Doushantuo Formation of the Yangtze Gorges. Four species in four genera, including two new genera, two new species and one uncertain species are systematically described for the first time from the studied locality. The taxa are Bacatisphaera baokangensis Zhou, Brasier et Xue, 2001, Taeniosphaera doushantuoensis gen. et sp. nov., Rugospinasphaera speciosa gen. et sp. nov. and Meghystichosphaeridium sp. The new data enriches the famous Weng＇an biota, especially the marine microplankton flora in the Ediacaran Doushantuo Formation.
文摘安图县新合研究区位于柴达木—华北板块(Ⅲ)、华北陆块北部陆缘造山带(ⅢA)、哈兰达岭—英额岭新元古代—古生代叠覆造山亚带(ⅢA 1)中部。处于Ⅲ55吉中—延边(活动陆缘)Mo Au As Cu Zn Fe Ni W成矿带内,成矿地质条件和找矿前景较好。通过1∶1万土壤地球化学测量,对10种成矿元素进行地球化学参数特征分析,圈定综合异常13处,重点对Ht1、Ht2和Ht5异常特征进行综合分析。在此基础上,结合成矿地质条件和矿化蚀变特征,优选出找矿靶区2处。对B1号找矿靶区Au元素异常浓集中心进行工程验证,发现1条金矿化蚀变带,带内见5条金矿体,进一步证实本区具有较好的找矿前景。
