Provenance Analysis and Sedimentary Facies Distribution of Jingjingzigou Formation in the Southeastern Margin of the Junggar Basin

doi:10.19657/j.geoscience.1000-8527.2025.011

Abstract

Abstract:

The Lower Permian Jingjingzigou Formation, a significant oil and gas reservoir in the southeastern margin of the Junggar Basin, has been a key research focus due to its complex sedimentary characteristics and provenance system. This study investigates the Jingjingzigou Formation exposed in the Sigonghe, Jingjingzigou, Hongyanchi, and Aiweiergou sections of the southeastern Junggar Basin. Detailed field descriptions and sedimentary facies interpretations, combined with provenance tracing techniques including heavy mineral associations, the ZTR index, Q-type cluster analysis of heavy minerals, and zircon U-Pb dating, were employed to investigate the provenance system and sedimentary characteristics of the formation in the study area. The results indicate that during the sedimentary period of the Jingjingzigou Formation in the eastern Bogda Peak area, East Bogda Mountain served as the primary provenance, with the Beisantai Uplift as the secondary source. In this region, low-relief, broad paleogeomorphic settings favored the development of distal braided river slope deposits. The Bogda Peak area, characterized by local uplifts, exhibited a primary provenance and developed proximal braided river and turbidite deposits. The Aiweiergou section was primarily sourced from Yilinheibiergen Mountain and was marked by the development of a proximal fan delta under the influence of tectonic uplift. By integrating the provenance and sedimentary system studies, this research clarifies the presence of a bidirectional (east-west) provenance system in the Jingjingzigou Formation along the southeastern margin of the Junggar Basin. This study refines the understanding of the sedimentary distribution patterns and successfully established a comprehensive tectonic-sedimentary model for this region during the Early Permian, providing a theoretical basis for oil and gas exploration in the region.

Key words: southeastern margin of Junggar Basin, Jingjingzigou Formation, provenance analysis, sedimentary characteristics, sedimentary facies

CLC Number:

WEI Chaofan, ZHANG Zhijie, WAN Li, CHENG Dawei, LI Shunli, SUN Hongwei. Provenance Analysis and Sedimentary Facies Distribution of Jingjingzigou Formation in the Southeastern Margin of the Junggar Basin[J]. Geoscience, 2025, 39(02): 327-350.

Figures/Tables 15

References 37

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剖面	重矿物分析	锆石U-Pb定年
四工河剖面	22#、26#
井井子沟剖面	28#、30#、31#	26#
红雁池剖面	45#、46#、47#、48#、49#	45#、46#
艾维尔沟剖面	40#、42#	39#、42#

剖面	重矿物分析	锆石U-Pb定年
四工河剖面	22#、26#
井井子沟剖面	28#、30#、31#	26#
红雁池剖面	45#、46#、47#、48#、49#	45#、46#
艾维尔沟剖面	40#、42#	39#、42#

样品	主要重矿物(>10%)	次要重矿物(1%~10%)	微量重矿物(<1%)	ZTR
22#	白钛石、锆石、磷灰石、铬尖晶石	锐钛矿、电气石、金红石、石榴子石、赤褐铁矿	黄铁矿	0.49
26#	角闪石、锆石、铬尖晶石	黄铁矿、磷灰石、辉锑矿	赤褐铁矿	0.32
28#	锆石	磷灰石、金红石、白钛石、黄铁矿	锐钛矿	0.93
30#	锆石	黄铁矿、白钛石	金红石、磷灰石、锐钛矿	0.99
31#	角闪石、锆石	铬尖晶石、绿帘石	钛铁矿、重晶石、黄铁矿	0.42
40#	白钛石、磷灰石、石榴子石	锆石、赤褐铁矿、重晶石	黄铁矿	0.07
42#	锆石、石榴子石	白钛石、重晶石、锐钛矿、磷灰石、铬尖晶石、黄铁矿	钛铁矿	0.47
45#	锆石、磷灰石	黄铁矿、锡石、金红石	白钛石、锐钛矿	0.63
46#	铬尖晶石、赤褐铁矿、锆石	磷灰石、钛铁矿、角闪石	白钛石、金红石、黄铁矿、石榴子石	0.18
47#	角闪石、铬尖晶石、钛铁矿	锆石、磷灰石、赤褐铁矿	锐钛矿、金红石、白钛石、黄铁矿	0.09
48#	角闪石、黄铁矿、锆石、磷灰石、铬尖晶石	赤褐铁矿、锐钛矿	方铅矿、金红石	0.19
49#	铬尖晶石、磷灰石、角闪石	锆石、黄铁矿、锐钛矿	金红石	0.09

样品	主要重矿物(>10%)	次要重矿物(1%~10%)	微量重矿物(<1%)	ZTR
22#	白钛石、锆石、磷灰石、铬尖晶石	锐钛矿、电气石、金红石、石榴子石、赤褐铁矿	黄铁矿	0.49
26#	角闪石、锆石、铬尖晶石	黄铁矿、磷灰石、辉锑矿	赤褐铁矿	0.32
28#	锆石	磷灰石、金红石、白钛石、黄铁矿	锐钛矿	0.93
30#	锆石	黄铁矿、白钛石	金红石、磷灰石、锐钛矿	0.99
31#	角闪石、锆石	铬尖晶石、绿帘石	钛铁矿、重晶石、黄铁矿	0.42
40#	白钛石、磷灰石、石榴子石	锆石、赤褐铁矿、重晶石	黄铁矿	0.07
42#	锆石、石榴子石	白钛石、重晶石、锐钛矿、磷灰石、铬尖晶石、黄铁矿	钛铁矿	0.47
45#	锆石、磷灰石	黄铁矿、锡石、金红石	白钛石、锐钛矿	0.63
46#	铬尖晶石、赤褐铁矿、锆石	磷灰石、钛铁矿、角闪石	白钛石、金红石、黄铁矿、石榴子石	0.18
47#	角闪石、铬尖晶石、钛铁矿	锆石、磷灰石、赤褐铁矿	锐钛矿、金红石、白钛石、黄铁矿	0.09
48#	角闪石、黄铁矿、锆石、磷灰石、铬尖晶石	赤褐铁矿、锐钛矿	方铅矿、金红石	0.19
49#	铬尖晶石、磷灰石、角闪石	锆石、黄铁矿、锐钛矿	金红石	0.09