新疆吾合沙鲁铜矿床含铜岩系安居安组下段砂岩粒度特征与沉积环境分析

doi:10.19657/j.geoscience.1000-8527.2023.088

摘要/Abstract

摘要：

吾合沙鲁铜矿床位于新疆西南天山乌恰前陆盆地北缘,该盆地内沉积大套中生代—新生代陆相砂体,是该区域铅锌、铜、铀等砂岩型矿床的重要含矿岩系。关于该矿床沉积学方面的研究工作薄弱,长期制约着对区域成矿规律的深入认识及对矿床勘查的有效指导。本文以吾合沙鲁铜矿床含铜岩系新近系中新统安居安组下段碎屑沉积岩为主要研究对象,以沉积学、层序地层学、岩相古地理学和碎屑岩石学理论为指导,系统采集矿区内安居安组下段砂岩粒度分析样品,采用碎屑岩粒度分析测试手段,对沉积物展开细致和深入的研究。结果表明,安居安组沉积相类型与辫状河三角洲相沉积特征一致,在各岩性段内识别出辫状河三角洲平原和辫状河三角洲前缘2种沉积亚相及分流河道砂坝、陆上天然堤、水下分流河道、分流间湾、河口砂坝及远砂坝6种沉积微相。安居安组下段为研究区主要富铜层位,其中水下分流河道微相和分流河道砂坝微相,可作为吾合沙鲁地区铜矿勘查的重点目标。研究成果可为吾合沙鲁铜矿周边及外围资源远景预测提供找矿思路,为区域探寻砂岩型铜矿提供新的借鉴。

关键词: 砂岩型铜矿, 粒度特征, 沉积环境, 安居安组, 吾合沙鲁, 乌恰盆地

Abstract:

The Wuhe Shalu copper deposit is located at the northern margin of the Wuqia foreland basin in the Tianshan Mountains, Southwest Xinjiang.Large sets of Meso-Cenozoic continental sand bodies are deposited in this basin, forming important ore-bearing rock series of lead, zinc, copper, uranium, and other sandstone-type deposits.The lack of sedimentological studies on this deposit has long restricted the understanding of regional metallogeny and hindered mineral exploration.Therefore, this paper uses the Wuhe Shalu copper deposit as a case study, focusing on the clastic sedimentary rocks of the Neogene Miocene Anju’an Formation containing copper.This study primarily uses methods from sedimentology, sequence stratigraphy, lithofacies paleogeography, and clastic petrology.Samples for grain-size analysis of the lower member of Anju’an Formation in the mining area were systematically collected.Grain-size analysis and analytical methods of clastic rock were used to conduct in-depth research on the sediments in the mining area.The results show that the sedimentary facies type of Anju’an Formation is consistent with that of braided river delta.We identified two sedimentary subfacies: braided river delta plain and braided river delta front.In addition, we recognized six sedimentary microfacies in each lithologic segment: distributary channel sand bar, natural embankment on land, underwater distributary channel, interdistributary bay, estuarine sand bar, and far sand bar.The lower part of the Anju’an Formation is the main copper-rich horizon in the study area.The microfacies of the underwater distributary channel and the distributary channel sand bar are key targets for copper exploration in the Wuhe Shalu area.The sudy results provide a prospecting strategy for resource prediction on both sides and the periphery of the Wuhe Shalu copper deposit, and also serve as an important reference for searching for sandstone copper deposits in this area.

Key words: sandstone-type copper deposit, grain size characteristic, sedimentary environment, Anju’an Formation, Wuhe Shalu, Wuqia Basin

中图分类号:

柳坤峰, 冯昌荣, 徐磊, 祁晓鹏, 蔡振锋, 谢晋, 翟黎明, 雷浩. 新疆吾合沙鲁铜矿床含铜岩系安居安组下段砂岩粒度特征与沉积环境分析[J]. 现代地质, 2024, 38(04): 1134-1146.

LIU Kunfeng, FENG Changrong, XU Lei, Qi Xiaopeng, CAI Zhenfeng, XIE Jin, ZHAI Liming, LEI Hao. Grain-sizeCharacteristics and Sedimentary Environment Analysis of the Lower Member of the Anju’an Formation, A Copper-bearing Rock Series at the Shalu Copper Deposit, Wuhe, Xinjiang[J]. Geoscience, 2024, 38(04): 1134-1146.

图/表 11

参考文献 35

[1]	董传奇, 胡煜昭, 任涛, 等. 塔西乌拉根铅锌矿床硫同位素地球化学特征[J]. 矿物学报, 2017, 37(5): 653-660.
[2]	何岸北. 新疆乌拉根铅锌矿克孜勒苏群五段物源分析及沉积特征研究[D]. 昆明: 昆明理工大学, 2017: 1-89.
[3]	黄普香. 西天山乌拉根超大型铅锌矿床矿石组构及地质意义[D]. 北京: 中国地质大学(北京), 2015: 1-58.
[4]	GAO R Z, XUE C J, ZHAO X B, et al. Source and possible leaching process of ore metals in the Uragen sandstone-hosted Zn-Pb deposit, Xinjiang, China: Constraints from lead isotopes and rare earth elements geochemistry[J]. Ore Geology Reviews, 2019, 106: 56-78.
[5]	王伟, 李文渊, 高满新, 等. 塔里木陆块西北缘萨热克砂岩型铜矿床构造-流体演化对成矿的制约[J]. 地质通报, 2018, 37(7): 1315-1324.
[6]	方维萱, 贾润幸, 郭玉乾, 等. 塔西地区富烃类还原性盆地流体与砂砾岩型铜铅锌-铀矿床成矿机制[J]. 地球科学与环境学报, 2016, 38(6): 727-752.
[7]	WANG L, FANG W X, JIA R X, et al. The features of sedimentary facies and copper enrichment metallogenic regularities of kuzigongsu group in sareke glutenite type copper deposits, Wuqia, Xinjiang[J]. Acta Geologica Sinica, 2017, 91: 195-196.
[8]	YU W J, FANG W X, GUO Y Q, et al. On Mineralize-halo-forming mechanism of Sareke Glutenite-type copper deposit in Xinjiang[J]. Acta Geologica Sinica, 2017, 91: 245-246.
[9]	HAN W H, FANG W X, ZHANG G S, et al. Studies on cataclastic lithofacies and copper metallogenic regularity for the Glutenite-type Sareke copper deposit, Xinjiang[J]. Acta Geologica Sinica, 2017, 91: 210-211.
[10]	张宇寒, 胡煜昭, 任涛, 等. 塔西花园砂岩型铜矿床氧化铜矿物研究[J]. 矿物学报, 2017, 37(5): 625-629.
[11]	刘敬轩. 新疆花园铜矿床地质地球化学特征[D]. 昆明: 昆明理工大学, 2018.
[12]	辛江. 新疆乌恰县杨叶砂岩型铜矿地质特征及成因浅析[J]. 矿床地质, 2010, 29(1): 393-394.
[13]	康军, 贺小鹏. 新疆乌恰县伊日库勒—吾东一带砂岩型铜矿地质特征及其成因探讨[J]. 西部探矿工程, 2016, 28(9): 136-139.
[14]	柳坤峰, 冯昌荣, 翟黎明, 等. 新疆乌恰县吾合沙鲁地区水系沉积物地球化学特征与找矿远景[J]. 现代地质, 2019, 33(4): 759-771.
[15]	柳坤峰, 冯昌荣, 雷浩, 等. 水系沉积物测量发现新疆乌恰县吾合沙鲁中型铜矿[J]. 中国地质, 2020, 47(2): 548-549.
[16]	柳坤峰, 冯昌荣, 祁晓鹏, 等. 新疆乌恰县吾合沙鲁砂岩型铜矿床地质特征及找矿标志[J]. 西北地质, 2020, 53(3): 113-126.
[17]	柳坤峰, 冯昌荣, 屈小相, 等. 新疆乌恰县阿克套砂岩型铜矿的发现及意义[J]. 新疆地质, 2020, 38(1): 42-47.
[18]	刘增仁, 漆树基, 田培仁, 等. 塔里木盆地西北缘中新生代砂砾岩型铅锌铜矿赋矿层位的时代厘定及意义[J]. 矿产勘查, 2014, 5(2): 149-158.
[19]	彭飚, 雷光宇. 粒度分析方法在沉积学中的应用[J]. 科技与创新, 2019(11): 156-157.
[20]	刘华健, 金若时, 肖鹏, 等. 松辽盆地北部古恰地区含铀岩系四方台组粒度特征及其沉积环境指示意义[J]. 地质调查与研究, 2018, 41(1): 40-50.
[21]	王雪木, 瞿洪宝, 熊元凯, 等. 海南昌化江入海口底表沉积物粒度特征及输运趋势[J]. 现代地质, 2022, 36(1): 88-95.
[22]	陈碧珊, 陈诗敏, 何炽鹏. 雷州半岛红树林湿地表层沉积物粒度分布特征[J]. 现代地质, 2019, 33(1): 198-205.
[23]	陈松, 陈剑, 乔春生, 等. 图解法与矩值法在金沙江上游雪隆囊古滑坡堰塞湖溃坝堆积物粒度分析中的应用[J]. 现代地质, 2017, 31(6): 1278-1283.
[24]	彭飚, 常甜甜. 几种主要粒度分析方法的优缺点[J]. 科技与创新, 2019(10): 35-36, 39.
[25]	陈麦雨, 徐守余, 张立强, 等. 动态图像法与镜下测量法粒度分布结果对比研究[J]. 沉积学报, 2019, 37(3): 502-510.
[26]	罗章, 陈沈良, 张国安, 等. 动态图像仪与激光粒度仪的测试对比及其应用[J]. 海洋技术学报, 2017, 36(2): 46-52.
[27]	高荣臻. 新疆西南天山中—新生界砂岩容矿铅锌成矿作用: 以乌拉根铅锌矿床为例[D]. 北京: 中国地质大学(北京), 2018.
[28]	XUE C J, CHI G X, LI Z D, et al. Geology, geochemistry and genesis of the Cretaceous and Paleocene sandstone-and conglomerate-hosted Uragen Zn-Pb deposit, Xinjiang, China: A review[J]. Ore Geology Reviews, 2014, 63: 328-342.
[29]	成都地质学院陕北队. 沉积岩(物)粒度分析及其应用[M]. 北京: 地质出版社, 1978.
[30]	朱筱敏. 沉积岩石学[M]. 4版. 北京: 石油工业出版社, 2008.
[31]	BLOTT S J, PYE K. GRADISTAT: A grain size distribution and statistics package for the analysis of unconsolidated sediments[J]. Earth Surface Processes and Landforms, 2001, 26(11): 1237-1248.
[32]	杨玉卿, 田洪, 孟杰, 等. 渤海湾中部南堡35-2地区新第三系河流沉积及油气勘探意义[J]. 古地理学报, 2001, 3(4): 77-84.
[33]	李亚龙, 于兴河, 单新, 等. 鄂尔多斯盆地东南部下石盒子组盒8段物源特征与沉积相[J]. 东北石油大学学报, 2016, 40(3): 51-60, 4-5.
[34]	郑浚茂, 王德发, 孙永传. 黄骅拗陷几种砂体的粒度分布特征及其水动力条件的初步分析[J]. 石油实验地质, 1980, 2(2): 9-20, 61.
[35]	SAHU B K. Transformation of weight frequency and number frequency data in size distribution studies of clastic sediments[J]. SEPM Journal of Sedimentary Research, 1964,34: 768-773.

序号	样品编号		平均粒度(M_z)
1	PM78-6-1LD	粉砂质极细砂岩		3.26		1.05	0.28	1.19	280.84	111.88
2	PM78-6-2LD	粉砂质极细砂岩		3.42		1.29	0.42	1.18	289.07	113.44
3	PM78-6-3LD	粉砂质极细砂岩		3.78		0.94	0.22	1.28	245.86	80.21
4	PM78-8-1LD	粉砂质极细砂岩		3.23		1.19	0.39	1.16	308.53	126.74
5	PM78-8-2LD	粉砂质极细砂岩		3.19		1.36	0.34	1.27	418.60	132.13
6	PM78-8-3LD	粉砂质极细砂岩		3.40		1.16	0.30	1.20	282.28	105.11
7	PM78-10-1LD	粉砂质极细砂岩		3.68		1.21	0.23	1.34	316.08	83.62
8	PM78-10-2LD	粉砂质极细砂岩		3.10		1.25	0.33	1.18	411.31	138.69
9	PM78-10-3LD	粉砂质极细砂岩		3.55		1.09	0.18	1.44	337.20	89.62
10	PM78-12LD	细砂岩		2.01		0.82	0.22	0.95	723.49	260.62
11	PM78-14-1LD	粉砂质细砂岩		2.94		1.39	0.33	1.27	422.76	152.83
12	PM78-14-2LD	粉砂质极细砂岩		3.10		1.13	0.31	1.19	414.55	133.05
13	PM78-14-3LD	粉砂质极细砂岩		3.18		1.10	0.44	1.11	291.95	131.21
14	PM78-17LD	粉砂质极细砂岩		3.08		1.13	0.38	1.22	309.83	139.66
15	PM78-18LD	粉砂质极细砂岩		3.88		1.01	0.17	1.13	288.75	73.30
16	PM78-25-1LD	粉砂质细砂岩		2.94		1.12	0.15	1.09	453.49	136.79
17	PM78-25-2LD	粉砂质细砂岩		2.93		1.02	0.25	1.18	397.21	144.59
18	PM78-25-3LD	粉砂质极细砂岩		3.02		1.00	0.36	1.15	331.49	138.69
19	PM78-30LD	砂质粗粉砂岩		4.17		1.06	0.10	1.14	275.24	57.11
20	PM78-32LD	粉砂质极细砂岩		3.21		1.08	0.40	1.13	287.39	125.00
21	PM78-34LD	粉砂质极细砂岩		3.03		1.03	0.37	1.17	332.68	137.74
22	PM11-6-1LD	粉砂质细砂岩		2.75		0.97	0.28	1.50	396.98	166.09
23	PM11-6-2LD	粉砂质极细砂岩		3.85		1.37	0.20	1.12	359.95	74.84
24	PM11-8-1LD	粉砂质极细砂岩		3.54		1.15	0.12	1.08	409.09	88.39
25	PM11-8-2LD	粉砂质细砂岩		2.91		1.10	0.37	1.42	382.50	153.89
26	PM11-10LD	粉砂质细砂岩		2.98		0.95	0.28	1.11	339.05	138.69
27	PM11-12LD	粉砂质极细砂岩		3.04		0.94	0.20	1.05	382.47	129.41
28	PM11-14-1LD	粉砂质极细砂岩		3.33		1.15	0.35	1.11	289.81	114.23
29	PM11-14-2LD	粉砂质极细砂岩		3.49		1.08	0.14	1.28	396.72	90.87
30	PM11-14-3LD	粉砂质细砂岩		2.92		1.13	0.33	1.32	400.98	150.73
31	PM11-16LD	粉砂质极细砂岩		3.00		0.83	0.32	1.00	282.42	135.84
32	PM11-18LD	粉砂质极细砂岩		3.13		1.01	0.36	1.16	286.78	125.87
33	PM11-20LD	粉砂、黏土质极细砂岩		4.07		1.68	0.38	1.09	307.95	77.48
34	PM11-25LD	粉砂、黏土质细砂岩		2.85		0.96	0.35	1.45	346.37	156.04
35	PM11-28LD	砂、黏土质粗粉砂岩		4.21		1.58	0.04	1.03	468.76	53.29
36	PM11-30LD	砂、黏土质粗粉砂岩		4.57		1.26	0.10	1.19	283.65	43.59
37	PM107-17-1LD	粉砂、黏土质极细砂岩		3.14		1.39	0.42	1.36	399.44	141.61
38	PM107-17-2LD	粉砂质细砂岩		2.62		1.10	0.20	1.17	476.52	173.14
39	PM107-17-3LD	粉砂质细砂岩		2.89		1.23	0.38	1.45	399.69	159.32
40	PM107-18-1LD	粉砂质细砂岩		2.64		0.96	0.24	1.75	397.24	173.14
41	PM107-18-2LD	粉砂质极细砂岩		3.00		0.86	0.34	1.06	282.34	135.84
42	PM107-18-3LD	粉砂质极细砂岩		3.54		1.06	0.12	1.13	345.23	88.39
43	PM107-20LD	粉砂质极细砂岩		3.19		1.07	0.27	1.14	376.58	119.91
44	PM107-22LD	砂、黏土质粗粉砂岩		4.40		1.25	0.13	1.31	286.99	49.38
45	PM107-24-1LD	粉砂质极细砂岩		3.11		1.14	0.35	1.19	375.42	134.90
序号	样品编号	岩性	平均粒度(M_z)		标准偏差(σ_i)		偏度(S_K)	峰态(K_G)	C	M
46	PM107-24-2LD	粉砂质细砂岩	2.93		1.11		0.35	1.37	390.53	148.65
47	PM107-24-3LDDD	粉砂质极细砂岩	3.56		1.14		0.21	1.53	342.67	89.62
48	PM107-26LD	粉砂质细砂岩	2.75		0.85		0.27	1.60	373.51	163.79
49	PM107-28LD	粉砂、黏土质极细砂岩	3.99		1.13		0.27	1.28	257.90	69.35
50	PM107-30LD	粉砂质细砂岩	2.80		0.93		0.25	1.28	394.81	158.22
51	PM107-31LD	粉砂质极细砂岩	3.09		1.08		0.17	1.17	440.78	124.14
52	PM107-32LD	粉砂质极细砂岩	3.08		0.91		0.21	1.09	357.05	121.58
53	PM107-34LD	粉砂质极细砂岩	3.22		1.13		0.30	1.18	381.93	119.08
54	PM107-37LD	粉砂质细砂岩	2.86		0.93		0.25	1.19	382.22	151.77
	平均值		3.25		1.11		0.27	1.22	359.50	122.84

序号	样品编号		平均粒度(M_z)
1	PM78-6-1LD	粉砂质极细砂岩		3.26		1.05	0.28	1.19	280.84	111.88
2	PM78-6-2LD	粉砂质极细砂岩		3.42		1.29	0.42	1.18	289.07	113.44
3	PM78-6-3LD	粉砂质极细砂岩		3.78		0.94	0.22	1.28	245.86	80.21
4	PM78-8-1LD	粉砂质极细砂岩		3.23		1.19	0.39	1.16	308.53	126.74
5	PM78-8-2LD	粉砂质极细砂岩		3.19		1.36	0.34	1.27	418.60	132.13
6	PM78-8-3LD	粉砂质极细砂岩		3.40		1.16	0.30	1.20	282.28	105.11
7	PM78-10-1LD	粉砂质极细砂岩		3.68		1.21	0.23	1.34	316.08	83.62
8	PM78-10-2LD	粉砂质极细砂岩		3.10		1.25	0.33	1.18	411.31	138.69
9	PM78-10-3LD	粉砂质极细砂岩		3.55		1.09	0.18	1.44	337.20	89.62
10	PM78-12LD	细砂岩		2.01		0.82	0.22	0.95	723.49	260.62
11	PM78-14-1LD	粉砂质细砂岩		2.94		1.39	0.33	1.27	422.76	152.83
12	PM78-14-2LD	粉砂质极细砂岩		3.10		1.13	0.31	1.19	414.55	133.05
13	PM78-14-3LD	粉砂质极细砂岩		3.18		1.10	0.44	1.11	291.95	131.21
14	PM78-17LD	粉砂质极细砂岩		3.08		1.13	0.38	1.22	309.83	139.66
15	PM78-18LD	粉砂质极细砂岩		3.88		1.01	0.17	1.13	288.75	73.30
16	PM78-25-1LD	粉砂质细砂岩		2.94		1.12	0.15	1.09	453.49	136.79
17	PM78-25-2LD	粉砂质细砂岩		2.93		1.02	0.25	1.18	397.21	144.59
18	PM78-25-3LD	粉砂质极细砂岩		3.02		1.00	0.36	1.15	331.49	138.69
19	PM78-30LD	砂质粗粉砂岩		4.17		1.06	0.10	1.14	275.24	57.11
20	PM78-32LD	粉砂质极细砂岩		3.21		1.08	0.40	1.13	287.39	125.00
21	PM78-34LD	粉砂质极细砂岩		3.03		1.03	0.37	1.17	332.68	137.74
22	PM11-6-1LD	粉砂质细砂岩		2.75		0.97	0.28	1.50	396.98	166.09
23	PM11-6-2LD	粉砂质极细砂岩		3.85		1.37	0.20	1.12	359.95	74.84
24	PM11-8-1LD	粉砂质极细砂岩		3.54		1.15	0.12	1.08	409.09	88.39
25	PM11-8-2LD	粉砂质细砂岩		2.91		1.10	0.37	1.42	382.50	153.89
26	PM11-10LD	粉砂质细砂岩		2.98		0.95	0.28	1.11	339.05	138.69
27	PM11-12LD	粉砂质极细砂岩		3.04		0.94	0.20	1.05	382.47	129.41
28	PM11-14-1LD	粉砂质极细砂岩		3.33		1.15	0.35	1.11	289.81	114.23
29	PM11-14-2LD	粉砂质极细砂岩		3.49		1.08	0.14	1.28	396.72	90.87
30	PM11-14-3LD	粉砂质细砂岩		2.92		1.13	0.33	1.32	400.98	150.73
31	PM11-16LD	粉砂质极细砂岩		3.00		0.83	0.32	1.00	282.42	135.84
32	PM11-18LD	粉砂质极细砂岩		3.13		1.01	0.36	1.16	286.78	125.87
33	PM11-20LD	粉砂、黏土质极细砂岩		4.07		1.68	0.38	1.09	307.95	77.48
34	PM11-25LD	粉砂、黏土质细砂岩		2.85		0.96	0.35	1.45	346.37	156.04
35	PM11-28LD	砂、黏土质粗粉砂岩		4.21		1.58	0.04	1.03	468.76	53.29
36	PM11-30LD	砂、黏土质粗粉砂岩		4.57		1.26	0.10	1.19	283.65	43.59
37	PM107-17-1LD	粉砂、黏土质极细砂岩		3.14		1.39	0.42	1.36	399.44	141.61
38	PM107-17-2LD	粉砂质细砂岩		2.62		1.10	0.20	1.17	476.52	173.14
39	PM107-17-3LD	粉砂质细砂岩		2.89		1.23	0.38	1.45	399.69	159.32
40	PM107-18-1LD	粉砂质细砂岩		2.64		0.96	0.24	1.75	397.24	173.14
41	PM107-18-2LD	粉砂质极细砂岩		3.00		0.86	0.34	1.06	282.34	135.84
42	PM107-18-3LD	粉砂质极细砂岩		3.54		1.06	0.12	1.13	345.23	88.39
43	PM107-20LD	粉砂质极细砂岩		3.19		1.07	0.27	1.14	376.58	119.91
44	PM107-22LD	砂、黏土质粗粉砂岩		4.40		1.25	0.13	1.31	286.99	49.38
45	PM107-24-1LD	粉砂质极细砂岩		3.11		1.14	0.35	1.19	375.42	134.90
序号	样品编号	岩性	平均粒度(M_z)		标准偏差(σ_i)		偏度(S_K)	峰态(K_G)	C	M
46	PM107-24-2LD	粉砂质细砂岩	2.93		1.11		0.35	1.37	390.53	148.65
47	PM107-24-3LDDD	粉砂质极细砂岩	3.56		1.14		0.21	1.53	342.67	89.62
48	PM107-26LD	粉砂质细砂岩	2.75		0.85		0.27	1.60	373.51	163.79
49	PM107-28LD	粉砂、黏土质极细砂岩	3.99		1.13		0.27	1.28	257.90	69.35
50	PM107-30LD	粉砂质细砂岩	2.80		0.93		0.25	1.28	394.81	158.22
51	PM107-31LD	粉砂质极细砂岩	3.09		1.08		0.17	1.17	440.78	124.14
52	PM107-32LD	粉砂质极细砂岩	3.08		0.91		0.21	1.09	357.05	121.58
53	PM107-34LD	粉砂质极细砂岩	3.22		1.13		0.30	1.18	381.93	119.08
54	PM107-37LD	粉砂质细砂岩	2.86		0.93		0.25	1.19	382.22	151.77
	平均值		3.25		1.11		0.27	1.22	359.50	122.84

样品编号	岩性	Y₁	Y₂	样品编号	岩性	Y₁	Y₂
PM78-6-1LD	粉砂质极细砂岩	-9.52511	10.31	PM78-6-2LD	粉砂质极细砂岩	-15.0892	11.10
PM78-6-3LD	粉砂质极细砂岩	-7.12218	10.88	PM78-8-1LD	粉砂质极细砂岩	-12.8336	10.74
PM78-8-2LD	粉砂质极细砂岩	-16.3450	10.78	PM78-8-3LD	粉砂质极细砂岩	-11.7079	10.51
PM78-10-1LD	粉砂质极细砂岩	-12.2561	10.95	PM78-10-2LD	粉砂质极细砂岩	-13.8500	10.28
PM78-10-3LD	粉砂质极细砂岩	-9.58247	11.15	PM78-12LD	细砂岩	-5.93584	7.82
PM78-14-1LD	粉砂质细砂岩	-17.0901	10.48	PM78-14-2LD	粉砂质极细砂岩	-11.2453	10.31
PM78-14-3LD	粉砂质极细砂岩	-11.3111	10.85	PM78-17LD	粉砂质极细砂岩	-11.5791	10.93
PM78-18LD	粉砂质极细砂岩	-8.11709	9.77	PM78-25-1LD	粉砂质细砂岩	-10.3592	8.59
PM78-25-2LD	粉砂质细砂岩	-8.93322	9.82	PM78-25-3LD	粉砂质极细砂岩	-9.10635	10.49
PM78-30LD	砂质粗粉砂岩	-8.59374	9.54	PM78-32LD	粉砂质极细砂岩	-10.7153	10.73
PM11-6-1LD	粉砂质细砂岩	-8.10546	11.61	PM11-6-2LD	粉砂质极细砂岩	-15.7832	9.55
PM11-8-1LD	粉砂质极细砂岩	-10.6426	8.78	PM11-8-2LD	粉砂质细砂岩	-10.8962	11.81
PM11-10LD	粉砂质细砂岩	-7.89144	9.74	PM11-12LD	粉砂质极细砂岩	-7.34622	8.94
PM11-14-1LD	粉砂质极细砂岩	-11.8135	10.32	PM11-14-2LD	粉砂质极细砂岩	-9.29087	10.00
PM11-14-3LD	粉砂质细砂岩	-11.3319	10.99	PM11-16LD	粉砂质极细砂岩	-6.26326	9.53
PM11-18LD	粉砂质极细砂岩	-9.24624	10.62	PM11-20LD	黏土质极细砂岩	-24.8986	10.39
PM11-25LD	黏土质极细砂岩	-8.27448	11.90	PM11-28LD	黏土质粗粉砂岩	-20.368	8.03
PM11-30LD	黏土质粗粉砂岩	-12.5204	9.93	PM107-17-1LD	黏土质极细砂岩	-17.4301	11.72
PM107-17-2LD	粉砂质细砂岩	-10.2676	9.11	PM107-17-3LD	粉砂质细砂岩	-13.5899	11.90
PM107-18-1LD	粉砂质细砂岩	-7.65152	12.59	PM107-18-2LD	粉砂质极细砂岩	-6.77636	9.96
PM107-18-3LD	粉砂质极细砂岩	-8.8761	9.12	PM107-20LD	粉砂质极细砂岩	-9.89168	9.90
PM107-22LD	砂、粗粉砂岩	-12.4379	10.64	PM107-24-1LD	粉砂质极细砂岩	-11.6371	10.58
PM107-24-2LD	粉砂质极细砂岩	-11.0103	11.42	PM107-24-3LD	粉砂质细砂岩	-10.6598	11.79
PM107-26LD	粉砂质细砂岩	-6.09505	12.16	PM107-28LD	粉砂、极细砂岩	-10.7524	11.22
PM107-30LD	粉砂质细砂岩	-7.38465	10.31	PM107-31LD	粉砂质极细砂岩	-9.60477	9.30
PM107-32LD	粉砂质极细砂岩	-6.87826	9.27	PM107-34LD	粉砂质极细砂岩	-11.1670	10.29
PM107-37LD	粉砂质细砂岩	-7.41092	9.89

样品编号	岩性	Y₁	Y₂	样品编号	岩性	Y₁	Y₂
PM78-6-1LD	粉砂质极细砂岩	-9.52511	10.31	PM78-6-2LD	粉砂质极细砂岩	-15.0892	11.10
PM78-6-3LD	粉砂质极细砂岩	-7.12218	10.88	PM78-8-1LD	粉砂质极细砂岩	-12.8336	10.74
PM78-8-2LD	粉砂质极细砂岩	-16.3450	10.78	PM78-8-3LD	粉砂质极细砂岩	-11.7079	10.51
PM78-10-1LD	粉砂质极细砂岩	-12.2561	10.95	PM78-10-2LD	粉砂质极细砂岩	-13.8500	10.28
PM78-10-3LD	粉砂质极细砂岩	-9.58247	11.15	PM78-12LD	细砂岩	-5.93584	7.82
PM78-14-1LD	粉砂质细砂岩	-17.0901	10.48	PM78-14-2LD	粉砂质极细砂岩	-11.2453	10.31
PM78-14-3LD	粉砂质极细砂岩	-11.3111	10.85	PM78-17LD	粉砂质极细砂岩	-11.5791	10.93
PM78-18LD	粉砂质极细砂岩	-8.11709	9.77	PM78-25-1LD	粉砂质细砂岩	-10.3592	8.59
PM78-25-2LD	粉砂质细砂岩	-8.93322	9.82	PM78-25-3LD	粉砂质极细砂岩	-9.10635	10.49
PM78-30LD	砂质粗粉砂岩	-8.59374	9.54	PM78-32LD	粉砂质极细砂岩	-10.7153	10.73
PM11-6-1LD	粉砂质细砂岩	-8.10546	11.61	PM11-6-2LD	粉砂质极细砂岩	-15.7832	9.55
PM11-8-1LD	粉砂质极细砂岩	-10.6426	8.78	PM11-8-2LD	粉砂质细砂岩	-10.8962	11.81
PM11-10LD	粉砂质细砂岩	-7.89144	9.74	PM11-12LD	粉砂质极细砂岩	-7.34622	8.94
PM11-14-1LD	粉砂质极细砂岩	-11.8135	10.32	PM11-14-2LD	粉砂质极细砂岩	-9.29087	10.00
PM11-14-3LD	粉砂质细砂岩	-11.3319	10.99	PM11-16LD	粉砂质极细砂岩	-6.26326	9.53
PM11-18LD	粉砂质极细砂岩	-9.24624	10.62	PM11-20LD	黏土质极细砂岩	-24.8986	10.39
PM11-25LD	黏土质极细砂岩	-8.27448	11.90	PM11-28LD	黏土质粗粉砂岩	-20.368	8.03
PM11-30LD	黏土质粗粉砂岩	-12.5204	9.93	PM107-17-1LD	黏土质极细砂岩	-17.4301	11.72
PM107-17-2LD	粉砂质细砂岩	-10.2676	9.11	PM107-17-3LD	粉砂质细砂岩	-13.5899	11.90
PM107-18-1LD	粉砂质细砂岩	-7.65152	12.59	PM107-18-2LD	粉砂质极细砂岩	-6.77636	9.96
PM107-18-3LD	粉砂质极细砂岩	-8.8761	9.12	PM107-20LD	粉砂质极细砂岩	-9.89168	9.90
PM107-22LD	砂、粗粉砂岩	-12.4379	10.64	PM107-24-1LD	粉砂质极细砂岩	-11.6371	10.58
PM107-24-2LD	粉砂质极细砂岩	-11.0103	11.42	PM107-24-3LD	粉砂质细砂岩	-10.6598	11.79
PM107-26LD	粉砂质细砂岩	-6.09505	12.16	PM107-28LD	粉砂、极细砂岩	-10.7524	11.22
PM107-30LD	粉砂质细砂岩	-7.38465	10.31	PM107-31LD	粉砂质极细砂岩	-9.60477	9.30
PM107-32LD	粉砂质极细砂岩	-6.87826	9.27	PM107-34LD	粉砂质极细砂岩	-11.1670	10.29
PM107-37LD	粉砂质细砂岩	-7.41092	9.89