塔里木盆地柯坪地区玉尔吐斯组同位素地层学研究——基于碳、锶同位素的化学地层对比与时代限定

吕心雄; 杨涛; 朱碧

doi:10.11781/sysydz2025051003

塔里木盆地柯坪地区玉尔吐斯组同位素地层学研究——基于碳、锶同位素的化学地层对比与时代限定

doi: 10.11781/sysydz2025051003

吕心雄^1,,
杨涛^1, ,,
朱碧²

1.
南京大学地球科学与工程学院关键地球物质循环与成矿全国重点实验室，南京 210023
2.
河海大学地球科学与工程学院，南京 210024

基金项目:

国家自然科学基金重点项目 41830425

中国科学院战略性先导科技专项B类子课题 XDB26000000

详细信息

作者简介:
吕心雄(2000—)，男，硕士生，从事矿物学、岩石学、矿床学相关研究。E-mail: 502022290008@smail.nju.edu.cn

通讯作者:
杨涛(1981—)，男，博士，教授，从事矿床地球化学研究。E-mail: yangtao@nju.edu.cn

中图分类号: TE121.3
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- 被引次数: 0
出版历程
- 收稿日期: 2025-02-04
- 修回日期: 2025-07-21
- 刊出日期: 2025-09-28

Isotope stratigraphy of Yurtus Formation in Keping area, Tarim Basin: chemical stratigraphic correlation and age constraints based on Carbon and Strontium isotopes

LU Hsinhsiung^1
,,
YANG Tao^{1
, ,},
ZHU Bi²

1.
State Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
2.
School of Earth Sciences and Engineering, Hohai University, Nanjing, Jiangsu 210024, China

摘要

摘要: 新元古代晚期—寒武纪早期是地质历史上的关键时期。新疆塔里木盆地柯坪地区埃迪卡拉系—寒武系地层出露较好，但化学地层学研究还相对薄弱。选取了新疆塔里木盆地柯坪地区的肖尔布拉克西沟和昆盖阔坦剖面下寒武统玉尔吐斯组碳酸盐岩为研究对象，通过碳、锶同位素的地球化学研究进行化学地层学的区域地层对比以及全球地层对比，限定了玉尔吐斯组地层的形成时代。样品的δ¹³C_carb—δ¹⁸O_carb关系性图、δ¹⁸O_carb、Mn/Sr等地球化学特征表明，绝大多数样品的δ¹³C_carb、⁸⁷Sr/⁸⁶Sr未受到后期成岩作用的改造，保留了沉积时的海水特征。样品的⁸⁷Sr/⁸⁶Sr与Sr含量、Rb含量的关系图显示溶样过程中没有大量硅酸盐组分的加入。无机碳同位素结果显示，两个剖面玉尔吐斯组碳酸盐岩中记录了两次碳同位素负漂移事件，分别位于灰岩—页岩互层段底部和上部泥质灰岩段，并能够与柯坪地区其他剖面进行对比。玉尔吐斯组碳酸盐岩⁸⁷Sr/⁸⁶Sr表现出“先下降，后上升”的变化特征，可以与摩洛哥地区和西伯利亚东南部地区的⁸⁷Sr/⁸⁶Sr在托莫特阶的变化对应。在玉尔吐斯组内未识别出全球碳同位素正异常ZHUCE事件，结合⁸⁷Sr/⁸⁶Sr变化特征和古生物资料，认为玉尔吐斯组内存在沉积间断并导致第二阶中下部地层的缺失。通过碳、锶同位素地层对比并结合前人研究资料，认为玉尔吐斯组中部白云岩段位于幸运阶与第二阶界限附近，灰岩—页岩互层段直到玉尔吐斯组顶部属于第二阶晚期到第三阶早期。
- 碳同位素 /
- 锶同位素 /
- 地层对比 /
- 玉尔吐斯组 /
- 塔里木盆地
Abstract: The Late Neoproterozoic to Early Cambrian represents a critical period in geological history. In the Keping area of the Tarim Basin, Xinjiang, the Ediacaran to Cambrian strata are well-exposed, but research on chemostratigraphy is relatively limited. This study selected the Lower Cambrian Yurtus Formation in the Xiaoerbulake Xigou and Kungaikuotan sections in the Keping area as the research subject. Carbon and Strontium isotope geochemistry were used to establish regional and global stratigraphic correlations and constrain the depositional age of the Yurtus Formation. The geochemical characteristics of the samples, including δ¹³C_carb-δ¹⁸O_carb crossplots, δ¹⁸O_carb, and Mn/Sr ratios, confirmed that the δ¹³C_carb and ⁸⁷Sr/⁸⁶Sr of most samples were not altered by later diagenesis and preserved the seawater characteristics at the time of deposition. Crossplots of ⁸⁷Sr/⁸⁶Sr versus Sr content and Rb content of the samples indicated that there was no significant addition of silicate components during the dissolution process. The inorganic carbon isotope results showed that two negative carbon isotope excursions were recorded in the carbonates from the Yurtus Formation in both sections, located at the base of limestone and shale interbeds and in the upper argillaceous limestone member, respectively, which could be correlated with other sections in the Keping area. The ⁸⁷Sr/⁸⁶Sr ratios of Yurtus Formation carbonates exhibited a "decline-rise" pattern, which could be correlated with the ⁸⁷Sr/⁸⁶Sr variations in the Tommotian Stage of Morocco and southeastern Siberia. The global positive carbon isotope excursion ZHUCE event was not identified within the Yurtus Formation. Combined with ⁸⁷Sr/⁸⁶Sr variation characteristics and paleontological data, it is inferred that there was a sedimentary hiatus within the formation, resulting in the absence of the middle and lower Stage 2 strata. Based on carbon and strontium isotope stratigraphic correlations combined with previous studies, it is concluded that the middle dolomite member of the Yurtus Formation lies near the Fortunian and Stage 2 boundary, and the upper limestone and shale interbeds to the top of the Yurtus Formation belong to the late Stage 2 and early Stage 3 of the Cambrian.
- carbon isotope /
- strontium isotope /
- stratigraphic correlation /
- Yurtus Formation /
- Tarim Basin
注释:

利益冲突声明/Conflict of Interests

所有作者声明不存在利益冲突。

All authors declare no relevant conflict of interests.

作者贡献/Authors’Contributions

杨涛参与实验设计；吕心雄完成实验操作；吕心雄、杨涛、朱碧参与论文写作和修改。所有作者均阅读并同意最终稿件的提交。

The study was designed by YANG Tao. The experimental operation was completed by LYU Hsinhsiung. The manuscript was drafted and revised by LYU Hsinhsiung, YANG Tao, and ZHU Bi. All authors have read the final version of the paper and consented to its submission.

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图 1 塔里木盆地北缘柯坪地区地质概况

根据参考文献[37]修改。

Figure 1. Geological sketch map of Keping area in northern Tarim Basin

下载: 全尺寸图片幻灯片

图 2 塔里木盆地柯坪地区肖西沟剖面和昆盖阔坦剖面玉尔吐斯组碳酸盐岩δ¹³C_carb和⁸⁷Sr/⁸⁶Sr数据

Figure 2. δ¹³C_carb and ⁸⁷Sr/⁸⁶Sr data of carbonates from Yurtus Formation in Xiaoxigou and Kungaikuotan sections, Keping area, Tarim Basin

下载: 全尺寸图片幻灯片

图 3 塔里木盆地柯坪地区玉尔吐斯组碳酸盐岩δ¹³C_carb—δ¹⁸O_carb关系

Figure 3. Crossplots of δ¹³C_carb vs. δ¹⁸O_carb of Yurtus Formation, Keping area, Tarim Basin

下载: 全尺寸图片幻灯片

图 4 塔里木盆地柯坪地区玉尔吐斯组碳酸盐岩Mn/Sr与δ¹³C_carb (a)、⁸⁷Sr/⁸⁶Sr(b)关系

Figure 4. Crossplots of Mn/Sr and δ¹³C_carb (a), ⁸⁷Sr/⁸⁶Sr (b) in carbonates from Yurtus Formation, Keping area, Tarim Basin

下载: 全尺寸图片幻灯片

图 5 塔里木盆地柯坪地区玉尔吐斯组碳酸盐岩⁸⁷Sr/⁸⁶Sr与Sr(a, c)、Rb(b, d)含量关系

Figure 5. Crossplots of ⁸⁷Sr/⁸⁶Sr and Sr content (a, c), Rb content (b, d) of carbonates from Yurtus Formation, Keping area, Tarim Basin

下载: 全尺寸图片幻灯片

图 6 塔里木盆地柯坪地区剖面间δ¹³C_carb地层横向对比

曲线Ⅰ.肖西沟剖面；曲线Ⅱ.昆盖阔坦剖面；曲线Ⅲ.苏盖特布拉克剖面^[42-43]；曲线Ⅳ.于提希剖面^[43]；曲线Ⅴ.下寒武统全球海水碳同位素标准^[17]。相同颜色区域/边框代表可相互对比。

Figure 6. δ¹³C_carb stratigraphic correlation between sections in Keping area, Tarim Basin

下载: 全尺寸图片幻灯片

图 7 全球剖面⁸⁷Sr/⁸⁶Sr地层横向对比

曲线A.肖西沟剖面；曲线B.昆盖阔坦剖面；曲线C.摩洛哥地区^[48]；曲线D.西伯利亚东南部地区^[49]。相同颜色区域/边框代表可相互对比。

Figure 7. ⁸⁷Sr/⁸⁶Sr stratigraphic correlation between sections across globe

下载: 全尺寸图片幻灯片

图 8 塔里木盆地柯坪地区剖面间玉尔吐斯组δ¹³C_carb、⁸⁷Sr/⁸⁶Sr地层横向对比

a.全球海水锶同位素曲线；b.肖西沟剖面；c.昆盖阔坦剖面；d.全球海水碳同位素曲线^[17]。相同颜色区域/边框代表可相互对比。

Figure 8. δ¹³C_carb and ⁸⁷Sr/⁸⁶Sr stratigraphic correlation in Yurtus Formation between sections in Keping area, Tarim Basin

下载: 全尺寸图片幻灯片

表 1 塔里木盆地柯坪地区肖西沟剖面玉尔吐斯组碳酸盐岩同位素和元素含量

Table 1. Isotope and element contents of carbonates from Yurtus Formation in Xiaoxigou section, Keping area, Trim Basin

样品号	地层	岩性	高度/cm	δ¹³C_carb/‰	δ¹⁸O_carb/‰	⁸⁷Sr/⁸⁶Sr	±σ	Ca/%	Mg/%	Mn/(μg/g)	Rb/(μg/g)	Sr/(μg/g)	Mn/Sr
xxg1-6	玉尔吐斯组	白云岩	500	-0.48	-9.67			22.11	12.78	843.59	0.29	91.64	9.21
xxg-1-7	玉尔吐斯组	白云岩	540	-0.35	-8.00	0.709 212	0.000 010	21.96	12.88	849.41	0.35	69.50	12.22
xxg-1-8	玉尔吐斯组	白云岩	570	-0.20	-9.25			22.07	12.81	743.13	0.19	130.51	5.69
xxg-1-9	玉尔吐斯组	白云岩	590	-1.21	-9.51			22.63	12.40	821.71	0.16	212.74	3.86
xxg-1-10	玉尔吐斯组	白云岩	610	-0.69	-9.22			23.00	12.15	673.42	0.37	80.97	8.32
xxg-2-1	玉尔吐斯组	灰岩	625	-3.25	-9.20	0.708 565	0.000 009	39.58	0.30	324.12	0.28	319.58	1.01
xxg-2-2	玉尔吐斯组	灰岩	805	-3.81	-7.99	0.708 817	0.000 010	39.62	0.27	283.40	0.22	365.13	0.78
xxg-2-3	玉尔吐斯组	灰岩	815	-3.66	-7.72	0.708 258	0.000 009	39.66	0.24	216.34	0.18	439.21	0.49
xxg-2-4	玉尔吐斯组	灰岩	830	-3.73	-8.32	0.708 454	0.000 010	39.53	0.34	408.82	0.30	301.11	1.36
xxg-2-5	玉尔吐斯组	灰岩	845	-3.50	-7.84	0.708 342	0.000 012	39.56	0.31	385.36	0.21	303.92	1.27
xxg-2-6	玉尔吐斯组	灰岩	855	-3.35	-8.32	0.708 523	0.000 008	39.53	0.33	362.03	0.30	341.94	1.06
xxg-2-7	玉尔吐斯组	灰岩	870	-6.66	-9.88	0.708 356	0.000 006	39.52	0.34	232.91	0.31	318.18	0.73
xxg-2-8	玉尔吐斯组	灰岩	900	-3.11	-7.92	0.708 369	0.000 007	39.00	0.72	685.15	0.19	301.14	2.28
xxg-2-9	玉尔吐斯组	灰岩	925	-3.54	-7.93	0.708 378	0.000 009	39.65	0.25	429.30	0.26	337.03	1.27
xxg-2-10	玉尔吐斯组	灰岩	960	-3.25	-8.74			39.50	0.36	530.08	0.31	405.77	1.31
xxg-2-11	玉尔吐斯组	灰岩	975	-3.35	-8.13	0.708 783	0.000 006	39.56	0.32	1 576.10	0.29	243.90	6.46
xxg-2-12	玉尔吐斯组	灰岩	985	-8.88	-8.16			39.81	0.14	522.44	0.18	174.26	3.00
xxg-2-13	玉尔吐斯组	灰岩	1 015	-4.04	-7.77	0.708 567	0.000 005	39.62	0.27	734.81	0.28	239.30	3.07
xxg-2-14	玉尔吐斯组	灰岩	1 030	-2.90	-8.00			39.54	0.33	798.17	0.22	265.42	3.01
xxg-2-15	玉尔吐斯组	灰岩	1 040	-3.11	-7.77			39.58	0.30	601.21	0.23	304.54	1.97
xxg-2-16	玉尔吐斯组	灰岩	1 050	-2.34	-8.10	0.708 285	0.000 004	39.53	0.34	370.20	0.20	406.07	0.91
xxg-2-18	玉尔吐斯组	灰岩	1 100	-2.26	-8.04	0.708 507	0.000 006	39.59	0.29	319.46	0.22	464.30	0.69
xxg-2-19	玉尔吐斯组	灰岩	1 110	-2.92	-7.94			39.49	0.36	311.61	0.26	394.53	0.79
xxg-2-20	玉尔吐斯组	灰岩	1 125	-2.03	-7.41			39.62	0.27	275.42	0.29	424.28	0.65
xxg-2-21	玉尔吐斯组	灰岩	1 138	-2.91	-7.59	0.708 386	0.000 004	39.50	0.36	337.94	0.24	385.51	0.88
xxg-2-22	玉尔吐斯组	灰岩	1 163	-2.73	-7.84			39.43	0.41	470.72	0.16	361.23	1.30
xxg-2-23	玉尔吐斯组	灰岩	1 193	-3.32	-7.49	0.708 482	0.000 007	39.55	0.32	267.84	0.27	371.27	0.72
xxg-2-24	玉尔吐斯组	灰岩	1 233	-1.75	-7.50	0.708 320	0.000 006	39.45	0.39	291.85	0.32	470.90	0.62
xxg-2-25	玉尔吐斯组	灰岩	1 243	-1.14	-7.61			39.40	0.43	233.07	0.36	437.25	0.53
xxg-2-26	玉尔吐斯组	灰岩	1 250	-1.27	-8.08			39.51	0.35	239.77	0.27	426.05	0.56
xxg-2-28	玉尔吐斯组	灰岩	1 270	-1.49	-7.91	0.708 333	0.000 004	39.49	0.36	262.12	0.19	429.26	0.61
xxg-2-29	玉尔吐斯组	灰岩	1 275	-1.99	-7.65			39.34	0.47	269.61	0.25	446.59	0.60
xxg-2-30	玉尔吐斯组	灰岩	1 295	-1.83	-8.04	0.708 428	0.000 007	39.41	0.42	372.56	0.25	392.99	0.95
xxg-2-31	玉尔吐斯组	灰岩	1 310	-2.44	-8.18			39.42	0.41	672.58	0.17	352.81	1.91
xxg-2-32	玉尔吐斯组	灰岩	1 340	-0.17	-7.40			39.53	0.34	390.92	0.40	337.09	1.16
xxg-2-33	玉尔吐斯组	灰岩	1 360	-1.31	-7.72	0.708 364	0.000 006	39.46	0.39	950.54	0.28	354.90	2.68
xxg-2-34	玉尔吐斯组	灰岩	1 400	-1.56	-7.85			39.50	0.36	463.18	0.26	359.32	1.29
xxg-2-35	玉尔吐斯组	灰岩	1 430	0.71	-7.43	0.708 562	0.000 006	39.56	0.31	510.87	0.41	291.14	1.75
xxg-2-36	玉尔吐斯组	灰岩	1 445	-0.09	-7.87			39.51	0.35	1 066.16	0.22	331.78	3.21
xxg-2-37	玉尔吐斯组	灰岩	1 470	-0.90	-8.02			39.34	0.47	552.56	0.32	334.08	1.65
xxg-3-1	玉尔吐斯组	瘤状灰岩	1 510	-0.01	-7.85	0.708 518	0.000 008	39.46	0.38	2 228.02	0.29	392.53	5.68
xxg-3-2	玉尔吐斯组	瘤状灰岩	1 550	0.12	-8.13	0.708 556	0.000 005	39.51	0.35	540.57	0.26	343.17	1.58
xxg-3-3	玉尔吐斯组	瘤状灰岩	1 600	1.44	-7.55			39.41	0.42	351.21	0.34	474.54	0.74
xxg-3-4	玉尔吐斯组	瘤状灰岩	1 650	1.61	-7.70	0.708 444	0.000 005	39.41	0.42	523.38	0.30	339.35	1.54
xxg-3-5	玉尔吐斯组	瘤状灰岩	1 740	0.68	-7.89	0.708 660	0.000 005	38.46	1.10	793.91	0.25	337.39	2.35
xxg-3-6	玉尔吐斯组	瘤状灰岩	1 830	1.64	-7.97	0.708 703	0.000 005	39.46	0.38	448.01	0.28	377.56	1.19
xxg-3-7	玉尔吐斯组	泥质灰岩	1 875	1.18	-7.66			39.40	0.43	924.63	0.35	308.45	3.00
xxg-3-8	玉尔吐斯组	泥质灰岩	1 965	1.01	-5.47	0.708 739	0.000 004	38.05	1.39	579.23	0.39	285.85	2.03
xxg-3-9	玉尔吐斯组	泥质灰岩	2 015	0.76	-7.46			39.51	0.35	503.73	0.32	276.58	1.82
xxg-3-10	玉尔吐斯组	泥质灰岩	2 060	0.70	-5.87	0.708 801	0.000 006	38.62	0.99	635.00	0.43	284.02	2.24
xxg-3-11	玉尔吐斯组	泥质灰岩	2 105	-0.06	-8.99			37.77	1.59	675.56	0.61	261.56	2.58
xxg-3-12	玉尔吐斯组	泥质白云岩	2 150	-0.06	-9.10			23.18	12.02	1 469.33	0.52	101.80	14.43
xxg-3-13	玉尔吐斯组	泥质白云岩	2 210	-0.34	-8.44	0.709 751	0.000 007	22.80	12.28	1 559.40	0.37	66.09	23.59
xxg-3-14	玉尔吐斯组	泥质白云岩	2 330	-0.28	-8.07			22.07	12.80	1 212.41	0.35	58.97	20.56
xxg-3-15	玉尔吐斯组	泥质白云岩	2 370	-0.15	-8.11	0.709 432	0.000 004	22.01	12.85	763.29	0.19	67.15	11.37
xxg-3-16	肖尔布拉克组	白云岩	2 530	0.38	-8.12			21.79	13.01	382.18	0.08	51.13	7.48
xxg-3-17	肖尔布拉克组	白云岩	2 570	0.76	-7.37			22.43	12.55	249.11	0.07	53.33	4.67
xxg-3-18	肖尔布拉克组	白云岩	2 740	1.48	-7.58			23.23	11.98	255.49	0.11	77.21	3.31

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表 2 塔里木盆地柯坪地区昆盖阔坦剖面玉尔吐斯组碳酸盐岩同位素和元素含量

Table 2. Isotope and element contents of carbonates from Yurtus Formation in Kungaikuotan section, Keping area, Tarim Basin

样品号	岩性	高度/cm	δ¹³C_carb/‰	δ¹⁸O_carb/‰	⁸⁷Sr/⁸⁶Sr	±σ	Ca/%	Mg/%	Mn/(μg/g)	Rb/(μg/g)	Sr/(μg/g)	Mn/Sr
kgkt-3-1	白云岩	410	-3.88	-7.29
kgkt-4-2	灰岩	520	-3.48	-7.54			25.08	10.66	1 274.71	1.17	146.87	8.68
kgkt-4-4	灰岩	570	-3.70	-7.80			25.29	10.51	1 290.38	1.29	142.31	9.07
kgkt-4-6	灰岩	600	-4.03	-5.87			25.75	10.18	1 316.81	2.17	165.86	7.94
kgkt-4-8	灰岩	650	-2.28	-7.62	0.708 844	0.000 003	37.33	1.91	660.77	0.63	248.54	2.66
kgkt-4-9	灰岩	690	-2.32	-7.41	0.709 136	0.000 005	36.61	2.42	901.68	0.97	224.13	4.02
kgkt-4-11	灰岩	750	-2.09	-6.94	0.708 890	0.000 006	38.03	1.41	735.33	0.66	223.42	3.29
kgkt-4-12	灰岩	770	-1.82	-7.47			38.83	0.83	1 048.20	0.66	256.80	4.08
kgkt-4-13	灰岩	780	-3.39	-7.36			38.81	0.85	993.27	0.66	225.88	4.40
kgkt-4-14	灰岩	810	-0.77	-7.23	0.708 507	0.000 005	39.41	0.42	687.01	0.42	224.52	3.06
kgkt-4-15	灰岩	830	-2.68	-7.53			39.47	0.38	2 324.77	0.57	255.41	9.10
kgkt-4-16	灰岩	865	-0.57	-7.41	0.709 146	0.000 003	39.29	0.51	1 119.21	2.43	306.52	3.65
kgkt-4-17	灰岩	875	-0.91	-7.42			39.30	0.50	1 530.37	1.20	268.35	5.70
kgkt-4-18	灰岩	895	-0.15	-7.31			39.26	0.53	847.24	0.62	269.19	3.15
kgkt-4-19	灰岩	910	-0.46	-7.38	0.709 427	0.000 004	39.14	0.61	1 263.98	0.84	251.31	5.03
kgkt-5-1	瘤状白云岩	990	-2.52	-9.66			22.96	12.17	539.37	0.16	101.91	5.29
kgkt-5-2	瘤状灰岩	1 020	0.04	-7.52	0.708 860	0.000 006	39.04	0.68	592.52	0.68	243.51	2.43
kgkt-5-3	瘤状灰岩	1 144	-1.07	-7.22	0.708 670	0.000 004	39.25	0.54	593.73	0.59	266.18	2.23
kgkt-5-4	瘤状灰岩	1 242	-1.14	-7.75	0.708 581	0.000 006	39.45	0.39	694.86	0.35	263.84	2.63
kgkt-5-5	瘤状灰岩	1 359	-1.52	-6.97	0.708 783	0.000 004	39.47	0.38	1 805.01	0.19	294.81	6.12
kgkt-5-6	瘤状灰岩	1 411	-0.70	-7.42			39.54	0.33	706.53	0.24	321.60	2.20
kgkt-5-7	泥质灰岩	1 474	-0.31	-7.97	0.709 128	0.000 007	39.42	0.41	1 418.82	2.46	340.42	4.17
kgkt-5-8	泥质灰岩	1 494	-0.66	-7.70			39.51	0.35	1 225.09	0.61	242.22	5.06
kgkt-5-9	泥质灰岩	1 524	-0.85	-7.90			39.56	0.31	1 149.80	0.51	231.35	4.97
kgkt-5-9-1	泥质灰岩	1 544	-0.90	-6.77	0.708 840	0.000 006	39.41	0.42	532.71	0.42	259.58	2.05
kgkt-5-10	泥质灰岩	1 664	-4.29	-9.71	0.708 694	0.000 008	38.80	0.85	148.84	0.15	511.09	0.29
kgkt-5-11	泥质白云岩	1 744	-2.29	-9.05	0.709 078	0.000 005	24.42	11.13	236.47	0.36	160.69	1.47
kgkt-5-12	泥质白云岩	1 844	-1.99	-9.64			22.11	12.78	211.17	0.55	96.53	2.19
kgkt-5-13	泥质白云岩	1 964	-1.42	-8.32	0.709 465	0.000 007	21.83	12.98	175.81	0.51	80.69	2.18
kgkt-5-14	泥质白云岩	2 084	-1.36	-8.19			22.26	12.67	189.82	1.00	100.91	1.88
kgkt-5-15	泥质白云岩	2 184	-0.87	-8.41	0.709 434	0.000 006	22.09	12.80	168.20	0.45	81.93	2.05
kgkt-5-16	泥质白云岩	2 234	-0.75	-8.36			22.32	12.63	181.63	2.99	90.69	2.00
kgkt-5-17	泥质白云岩	2 264	-0.61	-8.70	0.709 280	0.000 006	22.18	12.73	169.80	1.13	76.33	2.22

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