柴达木盆地北缘高压—超高压变质带榴辉(闪)岩中钛载体的比对研究及地质意义
|
摘要
为研究柴达木盆地北缘高压—超高压变质带榴辉(闪)岩中钛矿物的赋存状态及载体之间的差异,在前人研究的基础上,通过2016年地表查证,从岩相学、矿物学、岩石地球化学、人工重砂、选矿实验等方面进行了比对研究。结果表明:鱼卡和丁叉叉南坡榴辉岩中的钛载体主要为金红石,而胜利口榴闪岩中钛载体主要为钛铁矿和榍石,进一步证实了榴辉岩在退变阶段和钛成矿作用中金红石转化为钛铁矿的理论观点。研究成果为柴达木盆地北缘高压—超高压变质带内寻找榴辉岩型金红石矿奠定了基础。
In order to study the occurrence and carrier differences of eclogite(amphibolite) titanium minerals in the high pressure-ultrahigh pressure metamorphic belt in the northern margin of Qaidam,based on the collection of previous data,through the surface verification in 2016,a systematic comparative study was carried out from the aspects of lithofacies,mineralogy,petrogeochemistry,artificial heavy sand,and beneficiation experiment. The comprehensive study shows that rutile is the main titanium carrier in the eclogite of the south slope Yuqia and Dingchacha,while ilmenite and titanite are the main titanium carriers in the eclogite Shenglikou,which further confirms the theoretical viewpoint that the transformation of rutile into ilmenite in the degenerative stage and titanium mineralization of eclogite. The research results can lay a foundation for the search of eclogite-type rutile ore in the high-pressure and ultrahigh pressure metamorphic belt in the north margin of Qaidam basin.
In order to study the occurrence and carrier differences of eclogite(amphibolite) titanium minerals in the high pressure-ultrahigh pressure metamorphic belt in the northern margin of Qaidam,based on the collection of previous data,through the surface verification in 2016,a systematic comparative study was carried out from the aspects of lithofacies,mineralogy,petrogeochemistry,artificial heavy sand,and beneficiation experiment. The comprehensive study shows that rutile is the main titanium carrier in the eclogite of the south slope Yuqia and Dingchacha,while ilmenite and titanite are the main titanium carriers in the eclogite Shenglikou,which further confirms the theoretical viewpoint that the transformation of rutile into ilmenite in the degenerative stage and titanium mineralization of eclogite. The research results can lay a foundation for the search of eclogite-type rutile ore in the high-pressure and ultrahigh pressure metamorphic belt in the north margin of Qaidam basin.
引文
[1] 赖少聪,邓晋福,赵海玲,等.柴达木盆地北缘古生代蛇绿岩及其构造意义[J].现代地质,1996,10(1):18-28.
[2] 杨经绥,许志琴,李海兵,等.柴达木盆地北缘地区榴辉岩的发现及潜在的地质意义[J].科学通报,1998,43(14):1544-1549.
[3] 孟繁聪,张建新,杨经绥,等.柴达木盆地北缘锡铁山榴辉岩的地球化学特征[J].岩石学报,2003,19(3):435-442.
[4] 杨经绥,宋述光,许志琴,等.柴达木盆地北缘早古生代高压—超高压变质带中发现典型的超高压矿物——柯石英[J].地质学报,2001,75(2):175-179.
[5] 余家华,刘洪贵.国内外钛矿和富钛料生产现状及发展趋势[J].世界有色金属,2003(6):4-8.
[6] 李怀坤,陆松年,赵风清,等.柴达木盆地北缘鱼卡河含柯石英榴辉岩的确定及其意义[J].现代地质,1999,13(1):43-50.
[7] 杨经绥,张建新,孟繁聪,等.中国西部柴达木盆地北缘—阿尔金的超高压变质榴辉岩及其原岩性质探讨[J].地学前缘,2003,10(3):291-314.
[8] 陈鑫,郑有业,许荣科,等.柴达木盆地北缘超高压变质带折返过程对金红石成矿的制约——来自鱼卡和铁石观西地区石榴石成分换代证据[J].地球科学与环境学报,2016,38(2):143-159.
[9] 陈丹玲,孙勇,刘良,等.柴达木盆地北缘野马滩超高压榴辉岩中副片麻岩夹层的锆石U-Pb定年及其地质意义[J].岩石学报,2008,24(5):1059-1067.
[10] 张建新,杨经绥,许志琴,等.阿尔金榴辉岩中超高压变质作用证据[J].地质学报,2001,75(2)180-185.
[11] 许荣科,陈鑫,王玉山,等.青海省大柴旦行委鱼卡地区金红石矿普查2016年度工作总结及2017年工作方案[R].西宁:中国地质大学(武汉)地质调查研究院,2016.
[12] 张海青,马玉成,吴永娟,等.青海省大柴旦镇胜利口东地区榴辉岩型金红石矿预查报告[R].西宁:青海省第四地质矿产勘查院,2017.
[13] 苏小冬,许存胜,朱建立,等.青海省乌兰县丁叉叉山南坡钛矿详查报告[R].西宁:青海聚能钛业有限公司,2016.
[14] 陈丹玲,孙勇,刘良,等.柴达木盆地北缘鱼卡河榴辉岩的变质演化—石榴石成分环带及矿物反应结构的证据[J].岩石学报,2005,21(4):1039-1048.
[15] 陈丹玲,孙勇,刘良,等.柴达木盆地北缘鱼卡河榴辉岩围岩的变质时代及其地质意义[J].地学前缘,2007,14(1):108-116.
[2] 杨经绥,许志琴,李海兵,等.柴达木盆地北缘地区榴辉岩的发现及潜在的地质意义[J].科学通报,1998,43(14):1544-1549.
[3] 孟繁聪,张建新,杨经绥,等.柴达木盆地北缘锡铁山榴辉岩的地球化学特征[J].岩石学报,2003,19(3):435-442.
[4] 杨经绥,宋述光,许志琴,等.柴达木盆地北缘早古生代高压—超高压变质带中发现典型的超高压矿物——柯石英[J].地质学报,2001,75(2):175-179.
[5] 余家华,刘洪贵.国内外钛矿和富钛料生产现状及发展趋势[J].世界有色金属,2003(6):4-8.
[6] 李怀坤,陆松年,赵风清,等.柴达木盆地北缘鱼卡河含柯石英榴辉岩的确定及其意义[J].现代地质,1999,13(1):43-50.
[7] 杨经绥,张建新,孟繁聪,等.中国西部柴达木盆地北缘—阿尔金的超高压变质榴辉岩及其原岩性质探讨[J].地学前缘,2003,10(3):291-314.
[8] 陈鑫,郑有业,许荣科,等.柴达木盆地北缘超高压变质带折返过程对金红石成矿的制约——来自鱼卡和铁石观西地区石榴石成分换代证据[J].地球科学与环境学报,2016,38(2):143-159.
[9] 陈丹玲,孙勇,刘良,等.柴达木盆地北缘野马滩超高压榴辉岩中副片麻岩夹层的锆石U-Pb定年及其地质意义[J].岩石学报,2008,24(5):1059-1067.
[10] 张建新,杨经绥,许志琴,等.阿尔金榴辉岩中超高压变质作用证据[J].地质学报,2001,75(2)180-185.
[11] 许荣科,陈鑫,王玉山,等.青海省大柴旦行委鱼卡地区金红石矿普查2016年度工作总结及2017年工作方案[R].西宁:中国地质大学(武汉)地质调查研究院,2016.
[12] 张海青,马玉成,吴永娟,等.青海省大柴旦镇胜利口东地区榴辉岩型金红石矿预查报告[R].西宁:青海省第四地质矿产勘查院,2017.
[13] 苏小冬,许存胜,朱建立,等.青海省乌兰县丁叉叉山南坡钛矿详查报告[R].西宁:青海聚能钛业有限公司,2016.
[14] 陈丹玲,孙勇,刘良,等.柴达木盆地北缘鱼卡河榴辉岩的变质演化—石榴石成分环带及矿物反应结构的证据[J].岩石学报,2005,21(4):1039-1048.
[15] 陈丹玲,孙勇,刘良,等.柴达木盆地北缘鱼卡河榴辉岩围岩的变质时代及其地质意义[J].地学前缘,2007,14(1):108-116.