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Genesis of S‐type Granites in the Pengshan Sn‐polymetallic Ore Field, Northern Jiangxi Province and its Implications
Acta Geologica Sinica-English Edition ( IF 3.5 ) Pub Date : 2020-12-09 , DOI: 10.1111/1755-6724.14599 Qingqing YIN 1, 2, 3 , Xinkui XIANG 2 , Zhendong YU 2 , Xiufeng YANG 1 , Tianchen WANG 2 , Bo ZHONG 2 , Rong TAN 2 , Jianhai LIAO 2 , Yuansong ZHU 2
Acta Geologica Sinica-English Edition ( IF 3.5 ) Pub Date : 2020-12-09 , DOI: 10.1111/1755-6724.14599 Qingqing YIN 1, 2, 3 , Xinkui XIANG 2 , Zhendong YU 2 , Xiufeng YANG 1 , Tianchen WANG 2 , Bo ZHONG 2 , Rong TAN 2 , Jianhai LIAO 2 , Yuansong ZHU 2
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The Pengshan Sn‐polymetallic ore field is located in the southeastern part of the Yangtze block, spanning the southeast edge of the MLYDZ and the northern edge of the mid‐segment of the Jiangnan Uplift, and on one side of the MLYDZ. The studies of LA–ICP–MS zircon U–Pb chronology and petrogeochemistry for Early Cretaceous acid granites from the Pengshan ore field were carried out in this paper. We report zircon U–Pb geochronology and whole‐rock geochemistry for acid granites in the Pengshan ore field. The zircon U–Pb ages of the muscovite‐granite, biotite adamellite and granite‐porphyry are 127.6 ± 1.7 Ma, 126.9 ± 1.6 Ma and 126.6 ± 2.0 Ma, respectively. The granites in Pengshan are characterized by a high silicon content and are rich in alkali. They belong to high‐potassium, calc‐alkaline, peraluminous granite. The rocks have a relatively high Rb/Ba ratio, and the data points for muscovite‐granite and biotite adamellite all fall within the clay‐rich sources region, near the pelite‐derived end‐member, showing that the Pengshan muscovite‐granite and biotite adamellite mainly originated from the partial melting of metapelites with high maturity. The transformation of the compressional and extensional tectonics in this region approximately 128 Ma obviously lags behind that in the mid‐segment of the Jiangnan Uplift (135 Ma), but occurred earlier than the MLYDZ (126 Ma). The Pengshan ore field extends from the mid‐segment of the Jiangnan Uplift to the MLYDZ. Although the tectonic stress field is constrained by the combination of the two secondary tectonic units, the time of tectonic system transformation is closer to the MLYDZ because the spatial orientation of the area is enclosed in the MLYDZ. Relevant geophysical and drilling data confirm the rationality of Pengshan–Ao'xia as a multi‐center vertical zoning ore field, and show the scientificity of the prospecting idea of abutting joint between the north‐west of Pengshan area and the south‐east of Ao'xia area.
中文翻译：
赣北彭山锡多金属矿田S型花岗岩成因及其意义
彭山锡多金属矿场位于扬子地块的东南部，横跨MLYDZ的东南边缘和江南隆起中段的北边缘，在MLYDZ的一侧。本文对彭山矿田早白垩世花岗岩的LA-ICP-MS锆石U-Pb年代学和岩石化学进行了研究。我们报告了彭山矿田酸性花岗岩的锆石U–Pb地球年代学和全岩地球化学。白云母-花岗岩，黑云母辉石和花岗岩-斑岩的锆石U-Pb年龄分别为127.6±1.7 Ma，126.9±1.6 Ma和126.6±2.0 Ma。彭山的花岗岩具有高硅含量和富含碱的特点。它们属于高钾，钙碱性，高铝质花岗岩。岩石具有较高的Rb / Ba比值，白云母-花岗岩和黑云母辉绿岩的数据点均位于富含粘土的源区中，即来自白云母的端粒附近，表明彭山白云母-花岗岩和黑云母辉石岩主要起源于高成熟的变质岩的部分熔融。该区域的压缩和伸展构造的转换明显落后于江南隆起中段（135 Ma）的转换，但比MLYDZ（126 Ma）更早。彭山矿田从江南隆起的中段一直延伸到MLYDZ。尽管构造应力场受到两个次生构造单元的组合的约束，构造系统转换的时间更接近MLYDZ，因为该区域的空间方向包含在MLYDZ中。有关的地球物理和钻探数据证实了彭山-奥夏作为多中心垂直分区矿田的合理性，并表明了彭山西北部和奥南东南部邻接接缝的勘探思路的科学性。夏区。
更新日期：2020-12-29
中文翻译：
赣北彭山锡多金属矿田S型花岗岩成因及其意义
彭山锡多金属矿场位于扬子地块的东南部，横跨MLYDZ的东南边缘和江南隆起中段的北边缘，在MLYDZ的一侧。本文对彭山矿田早白垩世花岗岩的LA-ICP-MS锆石U-Pb年代学和岩石化学进行了研究。我们报告了彭山矿田酸性花岗岩的锆石U–Pb地球年代学和全岩地球化学。白云母-花岗岩，黑云母辉石和花岗岩-斑岩的锆石U-Pb年龄分别为127.6±1.7 Ma，126.9±1.6 Ma和126.6±2.0 Ma。彭山的花岗岩具有高硅含量和富含碱的特点。它们属于高钾，钙碱性，高铝质花岗岩。岩石具有较高的Rb / Ba比值，白云母-花岗岩和黑云母辉绿岩的数据点均位于富含粘土的源区中，即来自白云母的端粒附近，表明彭山白云母-花岗岩和黑云母辉石岩主要起源于高成熟的变质岩的部分熔融。该区域的压缩和伸展构造的转换明显落后于江南隆起中段（135 Ma）的转换，但比MLYDZ（126 Ma）更早。彭山矿田从江南隆起的中段一直延伸到MLYDZ。尽管构造应力场受到两个次生构造单元的组合的约束，构造系统转换的时间更接近MLYDZ，因为该区域的空间方向包含在MLYDZ中。有关的地球物理和钻探数据证实了彭山-奥夏作为多中心垂直分区矿田的合理性，并表明了彭山西北部和奥南东南部邻接接缝的勘探思路的科学性。夏区。
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