水系沉积物地球化学勘查在西藏松多幅的找矿应用
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摘要
西藏松多地区位于冈底斯-念青唐古拉中生代、新生代铜钼金铁成矿带中的昂仁-南木林铁铜钼多金属成矿带。1/5万水系沉积物扫面成果显示,该区是铜、铅、锌、银、钨、钼等矿产的有利成矿区。依据元素相关性、空间分布特征和主要指示元素种类,划分出Cu-Pb-Zn-Ag-Sn元素组合、Cu-Au-W-Pb-Zn-Ag-Cd元素组合及Cu-Zn-Sn为主的元素组合等3个组合类型,并指出了元素组合异常内寻找的矿种和矿床类型,即铜多金属斑岩型、构造热液型。通过异常查证,发现了果夏弄铜铅锌多金属矿点及果夏弄南铜矿点等多处矿点,找矿成果明显,为该区找矿指明了方向。
Songduo area located in Angren-Nanmulin Fe-Cu-Mo metallogenic belt belongs to the GangdiseTanggula Mesozoic and Cenozoic Cu-Mo-Au-Fe metallogenic belt exhibiting good prospect for exploration. It is indicated that the area is a favorable metallogenic area for copper, lead, zinc, silver, tungsten, molybdenum and other minerals according to 1/50000 steam sediment survey. Three types of elements combinations including CuPb-Zn-Ag-Sn, Cu-Au-W-Pb-Zn-Ag-Cd and Cu-Zn-Sn are divided based on the correlation and spatial distribution characteristics of elements, and the main indicator elements types. Meanwhile, types of ore and deposits in each combination are also been pointed out, which is characterized by Copper polymetallic porphyry type and tectonic hydrothermal type.Several ore spot such as Guoxianong copper spot and South Guoxianong copper spot were found according to anomalous verification. It is not only a good indicator for the prospecting in this area, but also shows that the study area has a good prospecting potential.
Songduo area located in Angren-Nanmulin Fe-Cu-Mo metallogenic belt belongs to the GangdiseTanggula Mesozoic and Cenozoic Cu-Mo-Au-Fe metallogenic belt exhibiting good prospect for exploration. It is indicated that the area is a favorable metallogenic area for copper, lead, zinc, silver, tungsten, molybdenum and other minerals according to 1/50000 steam sediment survey. Three types of elements combinations including CuPb-Zn-Ag-Sn, Cu-Au-W-Pb-Zn-Ag-Cd and Cu-Zn-Sn are divided based on the correlation and spatial distribution characteristics of elements, and the main indicator elements types. Meanwhile, types of ore and deposits in each combination are also been pointed out, which is characterized by Copper polymetallic porphyry type and tectonic hydrothermal type.Several ore spot such as Guoxianong copper spot and South Guoxianong copper spot were found according to anomalous verification. It is not only a good indicator for the prospecting in this area, but also shows that the study area has a good prospecting potential.
引文
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[21]黄瀚霄,张林奎,刘洪,等.西藏冈底斯成矿带西段矿床类型、成矿作用和找矿方向[J/OL].地球科学,2019,doi:10.3799/dqkx.2018.364.
[22]李奋其,刘伟,张士贞,等.冈底斯南部打加错地区鸭洼基性杂岩的年代学及地球化学特征.地质学报,2012,86(10):1592-1603.
[23]刘洪,张林奎,黄瀚霄,等.冈底斯西段鲁尔玛斑岩型铜矿成矿流体性质及演化[J/OL].地球科学,2019,doi:10.3799/dqkx.2018.370.
[2]曹圣华,王卓,楼法生,等.西藏冈底斯中部铁铜矿成矿规律及找矿远景分析[J].地质学报,2014,88(11):2108-2118.
[3]杜保峰,杨长青,柴建玉,等.水系沉积物测量在西藏春哲地区找矿效果[J].中国地质,2018,45(3):604-616.
[4]潘桂棠,李兴振,王立全,等.青藏高原及邻区大地构造单元初步划分[J].地质通报,2002,21(11):701-707.
[5]潘桂棠,肖庆辉,陆松年,等.中国大地构造单元划分[J].中国地质,2009,36(1):1-28.
[6]耿全如,潘桂棠,王立全,等.班公湖-怒江带、羌塘地块特提斯演化与成矿地质背景[J].地质通报,2011,30(8):1261-1274.
[7] Shi R, Yang J, Xu Z, Qi X. The Bangong Lake ophiolite(NW Tibet)and its bearing on the tectonic evolution of the Bangong-Nujiang suture zone[J]. Journal of Asian Earth Sciences, 2008, 32(5):438-457.
[8]李光明,段志明,刘波,等.西藏班公湖-怒江结合带北缘多龙地区侏罗纪增生杂岩的特征及意义[J].地质通报,2011,30(8):1256-1260.
[9]李胜荣,肖润,周肃,等.西藏改则地区金成矿作用[J].矿床地质,2005,24(1):1-14.
[10]曲晓明,范淑芳,马旭东,等.西藏班公湖-怒江成矿带上的碰撞后铜矿床[J].矿床地质,2015,34(3):431-448.
[11]唐菊兴,张志,李志军,等.西藏尕尔穷—嘎拉勒铜金矿集区成矿规律、矿床模型与找矿方向[J].地球学报,2013,34(4):385-394.
[12]韩吟文,马振东.地球化学[M].北京:北京地质出版社,2003:46-47.
[12]刘洪,黄瀚霄,李光明,等.因子分析在藏北商旭金矿床地球化学勘查中的应用[J].中国地质,2015,42(4):1126-1136.
[13]刘洪,李光明,张智林,等.西藏改则县木如地区岩屑地球化学分析[J].金属矿山,2014,43(11):105-108.
[14]赵元艺,崔玉斌,吕立娜,等.西藏舍索矽卡岩型铜多金属矿床年代学与地球化学特征及意义[J].岩石学报,2011,(7):2132-2142.
[15]时艳香,纪宏金,陆继龙,等.水系沉积物地球化学分区的因子分析方法与应用[J].地质与勘探,2004,40(5):73-76.
[16]赵鹏大.定量地质学理论与方法[M].北京:地质出版社.2004,178-180.
[17]赵少卿,魏俊浩,高翔,等.因子分析在地球化学分区中的应用:以内蒙古石板井地区1/5万岩屑地球化学测量数据为例[J].地质科技情报,2012,31(2):27-34.
[18]刘洪.河南罗山金城金矿床成因与深部外围预测[D].武汉:中国地质大学,2012:1-100.
[19]刘洪,吕新彪,李春诚,等.河南罗山金城金矿床成矿条件与深部找矿前景分析[J].地质与勘探,2013,(2):265-273.
[20]刘洪,李光明,黄瀚霄,等.西藏冈底斯成矿带首次发现晚三叠世斑岩型铜矿[J].地球科学,2019,(51):11-21.
[21]黄瀚霄,张林奎,刘洪,等.西藏冈底斯成矿带西段矿床类型、成矿作用和找矿方向[J/OL].地球科学,2019,doi:10.3799/dqkx.2018.364.
[22]李奋其,刘伟,张士贞,等.冈底斯南部打加错地区鸭洼基性杂岩的年代学及地球化学特征.地质学报,2012,86(10):1592-1603.
[23]刘洪,张林奎,黄瀚霄,等.冈底斯西段鲁尔玛斑岩型铜矿成矿流体性质及演化[J/OL].地球科学,2019,doi:10.3799/dqkx.2018.370.